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xianfeng |
/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/info.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/timer.h>
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/*
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* fill ring buffer with silence
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* runtime->silence_start: starting pointer to silence area
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* runtime->silence_filled: size filled with silence
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* runtime->silence_threshold: threshold from application
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* runtime->silence_size: maximal size from application
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*
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* when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately
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*/
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void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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snd_pcm_uframes_t frames, ofs, transfer;
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if (runtime->silence_size < runtime->boundary) {
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snd_pcm_sframes_t noise_dist, n;
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if (runtime->silence_start != runtime->control->appl_ptr) {
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n = runtime->control->appl_ptr - runtime->silence_start;
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if (n < 0)
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n += runtime->boundary;
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if ((snd_pcm_uframes_t)n < runtime->silence_filled)
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runtime->silence_filled -= n;
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else
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runtime->silence_filled = 0;
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runtime->silence_start = runtime->control->appl_ptr;
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}
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if (runtime->silence_filled >= runtime->buffer_size)
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return;
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noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
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if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold)
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return;
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frames = runtime->silence_threshold - noise_dist;
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if (frames > runtime->silence_size)
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frames = runtime->silence_size;
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} else {
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if (new_hw_ptr == ULONG_MAX) { /* initialization */
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snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime);
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runtime->silence_filled = avail > 0 ? avail : 0;
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runtime->silence_start = (runtime->status->hw_ptr +
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runtime->silence_filled) %
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runtime->boundary;
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} else {
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ofs = runtime->status->hw_ptr;
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frames = new_hw_ptr - ofs;
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if ((snd_pcm_sframes_t)frames < 0)
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frames += runtime->boundary;
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runtime->silence_filled -= frames;
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if ((snd_pcm_sframes_t)runtime->silence_filled < 0) {
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runtime->silence_filled = 0;
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runtime->silence_start = new_hw_ptr;
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} else {
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runtime->silence_start = ofs;
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}
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}
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frames = runtime->buffer_size - runtime->silence_filled;
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}
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snd_assert(frames <= runtime->buffer_size, return);
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if (frames == 0)
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return;
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ofs = runtime->silence_start % runtime->buffer_size;
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while (frames > 0) {
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transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames;
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if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
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runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) {
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if (substream->ops->silence) {
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int err;
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err = substream->ops->silence(substream, -1, ofs, transfer);
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snd_assert(err >= 0, );
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} else {
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char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
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snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
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}
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} else {
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unsigned int c;
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unsigned int channels = runtime->channels;
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if (substream->ops->silence) {
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for (c = 0; c < channels; ++c) {
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int err;
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err = substream->ops->silence(substream, c, ofs, transfer);
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snd_assert(err >= 0, );
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}
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} else {
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size_t dma_csize = runtime->dma_bytes / channels;
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for (c = 0; c < channels; ++c) {
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char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs);
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snd_pcm_format_set_silence(runtime->format, hwbuf, transfer);
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}
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}
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}
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runtime->silence_filled += transfer;
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frames -= transfer;
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ofs = 0;
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}
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}
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static void xrun(struct snd_pcm_substream *substream)
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{
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snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG
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if (substream->pstr->xrun_debug) {
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snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
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substream->pcm->card->number,
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substream->pcm->device,
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substream->stream ? 'c' : 'p');
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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}
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#endif
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}
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static inline snd_pcm_uframes_t snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream,
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struct snd_pcm_runtime *runtime)
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{
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snd_pcm_uframes_t pos;
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pos = substream->ops->pointer(substream);
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if (pos == SNDRV_PCM_POS_XRUN)
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return pos; /* XRUN */
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if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
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getnstimeofday((struct timespec *)&runtime->status->tstamp);
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#ifdef CONFIG_SND_DEBUG
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if (pos >= runtime->buffer_size) {
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snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size);
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}
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#endif
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pos -= pos % runtime->min_align;
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return pos;
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}
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static inline int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
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struct snd_pcm_runtime *runtime)
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{
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snd_pcm_uframes_t avail;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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avail = snd_pcm_playback_avail(runtime);
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else
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avail = snd_pcm_capture_avail(runtime);
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if (avail > runtime->avail_max)
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runtime->avail_max = avail;
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if (avail >= runtime->stop_threshold) {
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if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING)
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snd_pcm_drain_done(substream);
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else
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xrun(substream);
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return -EPIPE;
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}
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if (avail >= runtime->control->avail_min)
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wake_up(&runtime->sleep);
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return 0;
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}
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static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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snd_pcm_uframes_t pos;
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snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt;
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snd_pcm_sframes_t delta;
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pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
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if (pos == SNDRV_PCM_POS_XRUN) {
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xrun(substream);
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return -EPIPE;
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}
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if (runtime->period_size == runtime->buffer_size)
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goto __next_buf;
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new_hw_ptr = runtime->hw_ptr_base + pos;
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hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size;
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delta = hw_ptr_interrupt - new_hw_ptr;
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if (delta > 0) {
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if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG
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if (runtime->periods > 1 && substream->pstr->xrun_debug) {
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snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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}
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#endif
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return 0;
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}
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__next_buf:
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runtime->hw_ptr_base += runtime->buffer_size;
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if (runtime->hw_ptr_base == runtime->boundary)
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runtime->hw_ptr_base = 0;
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new_hw_ptr = runtime->hw_ptr_base + pos;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
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runtime->silence_size > 0)
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snd_pcm_playback_silence(substream, new_hw_ptr);
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runtime->status->hw_ptr = new_hw_ptr;
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runtime->hw_ptr_interrupt = new_hw_ptr - new_hw_ptr % runtime->period_size;
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return snd_pcm_update_hw_ptr_post(substream, runtime);
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}
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/* CAUTION: call it with irq disabled */
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int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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snd_pcm_uframes_t pos;
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snd_pcm_uframes_t old_hw_ptr, new_hw_ptr;
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snd_pcm_sframes_t delta;
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old_hw_ptr = runtime->status->hw_ptr;
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pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
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if (pos == SNDRV_PCM_POS_XRUN) {
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xrun(substream);
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return -EPIPE;
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}
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new_hw_ptr = runtime->hw_ptr_base + pos;
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delta = old_hw_ptr - new_hw_ptr;
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248 |
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if (delta > 0) {
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249 |
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if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG
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if (runtime->periods > 2 && substream->pstr->xrun_debug) {
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snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
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if (substream->pstr->xrun_debug > 1)
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dump_stack();
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255 |
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}
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#endif
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257 |
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return 0;
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258 |
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}
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259 |
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runtime->hw_ptr_base += runtime->buffer_size;
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260 |
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if (runtime->hw_ptr_base == runtime->boundary)
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runtime->hw_ptr_base = 0;
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262 |
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new_hw_ptr = runtime->hw_ptr_base + pos;
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263 |
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}
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264 |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
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265 |
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runtime->silence_size > 0)
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266 |
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snd_pcm_playback_silence(substream, new_hw_ptr);
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267 |
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268 |
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runtime->status->hw_ptr = new_hw_ptr;
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269 |
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270 |
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return snd_pcm_update_hw_ptr_post(substream, runtime);
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271 |
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}
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272 |
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273 |
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/**
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274 |
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* snd_pcm_set_ops - set the PCM operators
|
275 |
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* @pcm: the pcm instance
|
276 |
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* @direction: stream direction, SNDRV_PCM_STREAM_XXX
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277 |
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* @ops: the operator table
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278 |
|
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*
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279 |
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* Sets the given PCM operators to the pcm instance.
|
280 |
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*/
|
281 |
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void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops)
|
282 |
|
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{
|
283 |
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struct snd_pcm_str *stream = &pcm->streams[direction];
|
284 |
|
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struct snd_pcm_substream *substream;
|
285 |
|
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|
286 |
|
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for (substream = stream->substream; substream != NULL; substream = substream->next)
|
287 |
|
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substream->ops = ops;
|
288 |
|
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}
|
289 |
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|
290 |
|
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EXPORT_SYMBOL(snd_pcm_set_ops);
|
291 |
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|
292 |
|
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/**
|
293 |
|
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* snd_pcm_sync - set the PCM sync id
|
294 |
|
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* @substream: the pcm substream
|
295 |
|
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*
|
296 |
|
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* Sets the PCM sync identifier for the card.
|
297 |
|
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*/
|
298 |
|
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void snd_pcm_set_sync(struct snd_pcm_substream *substream)
|
299 |
|
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{
|
300 |
|
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struct snd_pcm_runtime *runtime = substream->runtime;
|
301 |
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|
302 |
|
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runtime->sync.id32[0] = substream->pcm->card->number;
|
303 |
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runtime->sync.id32[1] = -1;
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304 |
|
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runtime->sync.id32[2] = -1;
|
305 |
|
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runtime->sync.id32[3] = -1;
|
306 |
|
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}
|
307 |
|
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|
308 |
|
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EXPORT_SYMBOL(snd_pcm_set_sync);
|
309 |
|
|
|
310 |
|
|
/*
|
311 |
|
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* Standard ioctl routine
|
312 |
|
|
*/
|
313 |
|
|
|
314 |
|
|
static inline unsigned int div32(unsigned int a, unsigned int b,
|
315 |
|
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unsigned int *r)
|
316 |
|
|
{
|
317 |
|
|
if (b == 0) {
|
318 |
|
|
*r = 0;
|
319 |
|
|
return UINT_MAX;
|
320 |
|
|
}
|
321 |
|
|
*r = a % b;
|
322 |
|
|
return a / b;
|
323 |
|
|
}
|
324 |
|
|
|
325 |
|
|
static inline unsigned int div_down(unsigned int a, unsigned int b)
|
326 |
|
|
{
|
327 |
|
|
if (b == 0)
|
328 |
|
|
return UINT_MAX;
|
329 |
|
|
return a / b;
|
330 |
|
|
}
|
331 |
|
|
|
332 |
|
|
static inline unsigned int div_up(unsigned int a, unsigned int b)
|
333 |
|
|
{
|
334 |
|
|
unsigned int r;
|
335 |
|
|
unsigned int q;
|
336 |
|
|
if (b == 0)
|
337 |
|
|
return UINT_MAX;
|
338 |
|
|
q = div32(a, b, &r);
|
339 |
|
|
if (r)
|
340 |
|
|
++q;
|
341 |
|
|
return q;
|
342 |
|
|
}
|
343 |
|
|
|
344 |
|
|
static inline unsigned int mul(unsigned int a, unsigned int b)
|
345 |
|
|
{
|
346 |
|
|
if (a == 0)
|
347 |
|
|
return 0;
|
348 |
|
|
if (div_down(UINT_MAX, a) < b)
|
349 |
|
|
return UINT_MAX;
|
350 |
|
|
return a * b;
|
351 |
|
|
}
|
352 |
|
|
|
353 |
|
|
static inline unsigned int muldiv32(unsigned int a, unsigned int b,
|
354 |
|
|
unsigned int c, unsigned int *r)
|
355 |
|
|
{
|
356 |
|
|
u_int64_t n = (u_int64_t) a * b;
|
357 |
|
|
if (c == 0) {
|
358 |
|
|
snd_assert(n > 0, );
|
359 |
|
|
*r = 0;
|
360 |
|
|
return UINT_MAX;
|
361 |
|
|
}
|
362 |
|
|
div64_32(&n, c, r);
|
363 |
|
|
if (n >= UINT_MAX) {
|
364 |
|
|
*r = 0;
|
365 |
|
|
return UINT_MAX;
|
366 |
|
|
}
|
367 |
|
|
return n;
|
368 |
|
|
}
|
369 |
|
|
|
370 |
|
|
/**
|
371 |
|
|
* snd_interval_refine - refine the interval value of configurator
|
372 |
|
|
* @i: the interval value to refine
|
373 |
|
|
* @v: the interval value to refer to
|
374 |
|
|
*
|
375 |
|
|
* Refines the interval value with the reference value.
|
376 |
|
|
* The interval is changed to the range satisfying both intervals.
|
377 |
|
|
* The interval status (min, max, integer, etc.) are evaluated.
|
378 |
|
|
*
|
379 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
380 |
|
|
*/
|
381 |
|
|
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
|
382 |
|
|
{
|
383 |
|
|
int changed = 0;
|
384 |
|
|
snd_assert(!snd_interval_empty(i), return -EINVAL);
|
385 |
|
|
if (i->min < v->min) {
|
386 |
|
|
i->min = v->min;
|
387 |
|
|
i->openmin = v->openmin;
|
388 |
|
|
changed = 1;
|
389 |
|
|
} else if (i->min == v->min && !i->openmin && v->openmin) {
|
390 |
|
|
i->openmin = 1;
|
391 |
|
|
changed = 1;
|
392 |
|
|
}
|
393 |
|
|
if (i->max > v->max) {
|
394 |
|
|
i->max = v->max;
|
395 |
|
|
i->openmax = v->openmax;
|
396 |
|
|
changed = 1;
|
397 |
|
|
} else if (i->max == v->max && !i->openmax && v->openmax) {
|
398 |
|
|
i->openmax = 1;
|
399 |
|
|
changed = 1;
|
400 |
|
|
}
|
401 |
|
|
if (!i->integer && v->integer) {
|
402 |
|
|
i->integer = 1;
|
403 |
|
|
changed = 1;
|
404 |
|
|
}
|
405 |
|
|
if (i->integer) {
|
406 |
|
|
if (i->openmin) {
|
407 |
|
|
i->min++;
|
408 |
|
|
i->openmin = 0;
|
409 |
|
|
}
|
410 |
|
|
if (i->openmax) {
|
411 |
|
|
i->max--;
|
412 |
|
|
i->openmax = 0;
|
413 |
|
|
}
|
414 |
|
|
} else if (!i->openmin && !i->openmax && i->min == i->max)
|
415 |
|
|
i->integer = 1;
|
416 |
|
|
if (snd_interval_checkempty(i)) {
|
417 |
|
|
snd_interval_none(i);
|
418 |
|
|
return -EINVAL;
|
419 |
|
|
}
|
420 |
|
|
return changed;
|
421 |
|
|
}
|
422 |
|
|
|
423 |
|
|
EXPORT_SYMBOL(snd_interval_refine);
|
424 |
|
|
|
425 |
|
|
static int snd_interval_refine_first(struct snd_interval *i)
|
426 |
|
|
{
|
427 |
|
|
snd_assert(!snd_interval_empty(i), return -EINVAL);
|
428 |
|
|
if (snd_interval_single(i))
|
429 |
|
|
return 0;
|
430 |
|
|
i->max = i->min;
|
431 |
|
|
i->openmax = i->openmin;
|
432 |
|
|
if (i->openmax)
|
433 |
|
|
i->max++;
|
434 |
|
|
return 1;
|
435 |
|
|
}
|
436 |
|
|
|
437 |
|
|
static int snd_interval_refine_last(struct snd_interval *i)
|
438 |
|
|
{
|
439 |
|
|
snd_assert(!snd_interval_empty(i), return -EINVAL);
|
440 |
|
|
if (snd_interval_single(i))
|
441 |
|
|
return 0;
|
442 |
|
|
i->min = i->max;
|
443 |
|
|
i->openmin = i->openmax;
|
444 |
|
|
if (i->openmin)
|
445 |
|
|
i->min--;
|
446 |
|
|
return 1;
|
447 |
|
|
}
|
448 |
|
|
|
449 |
|
|
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c)
|
450 |
|
|
{
|
451 |
|
|
if (a->empty || b->empty) {
|
452 |
|
|
snd_interval_none(c);
|
453 |
|
|
return;
|
454 |
|
|
}
|
455 |
|
|
c->empty = 0;
|
456 |
|
|
c->min = mul(a->min, b->min);
|
457 |
|
|
c->openmin = (a->openmin || b->openmin);
|
458 |
|
|
c->max = mul(a->max, b->max);
|
459 |
|
|
c->openmax = (a->openmax || b->openmax);
|
460 |
|
|
c->integer = (a->integer && b->integer);
|
461 |
|
|
}
|
462 |
|
|
|
463 |
|
|
/**
|
464 |
|
|
* snd_interval_div - refine the interval value with division
|
465 |
|
|
* @a: dividend
|
466 |
|
|
* @b: divisor
|
467 |
|
|
* @c: quotient
|
468 |
|
|
*
|
469 |
|
|
* c = a / b
|
470 |
|
|
*
|
471 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
472 |
|
|
*/
|
473 |
|
|
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c)
|
474 |
|
|
{
|
475 |
|
|
unsigned int r;
|
476 |
|
|
if (a->empty || b->empty) {
|
477 |
|
|
snd_interval_none(c);
|
478 |
|
|
return;
|
479 |
|
|
}
|
480 |
|
|
c->empty = 0;
|
481 |
|
|
c->min = div32(a->min, b->max, &r);
|
482 |
|
|
c->openmin = (r || a->openmin || b->openmax);
|
483 |
|
|
if (b->min > 0) {
|
484 |
|
|
c->max = div32(a->max, b->min, &r);
|
485 |
|
|
if (r) {
|
486 |
|
|
c->max++;
|
487 |
|
|
c->openmax = 1;
|
488 |
|
|
} else
|
489 |
|
|
c->openmax = (a->openmax || b->openmin);
|
490 |
|
|
} else {
|
491 |
|
|
c->max = UINT_MAX;
|
492 |
|
|
c->openmax = 0;
|
493 |
|
|
}
|
494 |
|
|
c->integer = 0;
|
495 |
|
|
}
|
496 |
|
|
|
497 |
|
|
/**
|
498 |
|
|
* snd_interval_muldivk - refine the interval value
|
499 |
|
|
* @a: dividend 1
|
500 |
|
|
* @b: dividend 2
|
501 |
|
|
* @k: divisor (as integer)
|
502 |
|
|
* @c: result
|
503 |
|
|
*
|
504 |
|
|
* c = a * b / k
|
505 |
|
|
*
|
506 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
507 |
|
|
*/
|
508 |
|
|
void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
|
509 |
|
|
unsigned int k, struct snd_interval *c)
|
510 |
|
|
{
|
511 |
|
|
unsigned int r;
|
512 |
|
|
if (a->empty || b->empty) {
|
513 |
|
|
snd_interval_none(c);
|
514 |
|
|
return;
|
515 |
|
|
}
|
516 |
|
|
c->empty = 0;
|
517 |
|
|
c->min = muldiv32(a->min, b->min, k, &r);
|
518 |
|
|
c->openmin = (r || a->openmin || b->openmin);
|
519 |
|
|
c->max = muldiv32(a->max, b->max, k, &r);
|
520 |
|
|
if (r) {
|
521 |
|
|
c->max++;
|
522 |
|
|
c->openmax = 1;
|
523 |
|
|
} else
|
524 |
|
|
c->openmax = (a->openmax || b->openmax);
|
525 |
|
|
c->integer = 0;
|
526 |
|
|
}
|
527 |
|
|
|
528 |
|
|
/**
|
529 |
|
|
* snd_interval_mulkdiv - refine the interval value
|
530 |
|
|
* @a: dividend 1
|
531 |
|
|
* @k: dividend 2 (as integer)
|
532 |
|
|
* @b: divisor
|
533 |
|
|
* @c: result
|
534 |
|
|
*
|
535 |
|
|
* c = a * k / b
|
536 |
|
|
*
|
537 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
538 |
|
|
*/
|
539 |
|
|
void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
|
540 |
|
|
const struct snd_interval *b, struct snd_interval *c)
|
541 |
|
|
{
|
542 |
|
|
unsigned int r;
|
543 |
|
|
if (a->empty || b->empty) {
|
544 |
|
|
snd_interval_none(c);
|
545 |
|
|
return;
|
546 |
|
|
}
|
547 |
|
|
c->empty = 0;
|
548 |
|
|
c->min = muldiv32(a->min, k, b->max, &r);
|
549 |
|
|
c->openmin = (r || a->openmin || b->openmax);
|
550 |
|
|
if (b->min > 0) {
|
551 |
|
|
c->max = muldiv32(a->max, k, b->min, &r);
|
552 |
|
|
if (r) {
|
553 |
|
|
c->max++;
|
554 |
|
|
c->openmax = 1;
|
555 |
|
|
} else
|
556 |
|
|
c->openmax = (a->openmax || b->openmin);
|
557 |
|
|
} else {
|
558 |
|
|
c->max = UINT_MAX;
|
559 |
|
|
c->openmax = 0;
|
560 |
|
|
}
|
561 |
|
|
c->integer = 0;
|
562 |
|
|
}
|
563 |
|
|
|
564 |
|
|
/* ---- */
|
565 |
|
|
|
566 |
|
|
|
567 |
|
|
/**
|
568 |
|
|
* snd_interval_ratnum - refine the interval value
|
569 |
|
|
* @i: interval to refine
|
570 |
|
|
* @rats_count: number of ratnum_t
|
571 |
|
|
* @rats: ratnum_t array
|
572 |
|
|
* @nump: pointer to store the resultant numerator
|
573 |
|
|
* @denp: pointer to store the resultant denominator
|
574 |
|
|
*
|
575 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
576 |
|
|
*/
|
577 |
|
|
int snd_interval_ratnum(struct snd_interval *i,
|
578 |
|
|
unsigned int rats_count, struct snd_ratnum *rats,
|
579 |
|
|
unsigned int *nump, unsigned int *denp)
|
580 |
|
|
{
|
581 |
|
|
unsigned int best_num, best_diff, best_den;
|
582 |
|
|
unsigned int k;
|
583 |
|
|
struct snd_interval t;
|
584 |
|
|
int err;
|
585 |
|
|
|
586 |
|
|
best_num = best_den = best_diff = 0;
|
587 |
|
|
for (k = 0; k < rats_count; ++k) {
|
588 |
|
|
unsigned int num = rats[k].num;
|
589 |
|
|
unsigned int den;
|
590 |
|
|
unsigned int q = i->min;
|
591 |
|
|
int diff;
|
592 |
|
|
if (q == 0)
|
593 |
|
|
q = 1;
|
594 |
|
|
den = div_down(num, q);
|
595 |
|
|
if (den < rats[k].den_min)
|
596 |
|
|
continue;
|
597 |
|
|
if (den > rats[k].den_max)
|
598 |
|
|
den = rats[k].den_max;
|
599 |
|
|
else {
|
600 |
|
|
unsigned int r;
|
601 |
|
|
r = (den - rats[k].den_min) % rats[k].den_step;
|
602 |
|
|
if (r != 0)
|
603 |
|
|
den -= r;
|
604 |
|
|
}
|
605 |
|
|
diff = num - q * den;
|
606 |
|
|
if (best_num == 0 ||
|
607 |
|
|
diff * best_den < best_diff * den) {
|
608 |
|
|
best_diff = diff;
|
609 |
|
|
best_den = den;
|
610 |
|
|
best_num = num;
|
611 |
|
|
}
|
612 |
|
|
}
|
613 |
|
|
if (best_den == 0) {
|
614 |
|
|
i->empty = 1;
|
615 |
|
|
return -EINVAL;
|
616 |
|
|
}
|
617 |
|
|
t.min = div_down(best_num, best_den);
|
618 |
|
|
t.openmin = !!(best_num % best_den);
|
619 |
|
|
|
620 |
|
|
best_num = best_den = best_diff = 0;
|
621 |
|
|
for (k = 0; k < rats_count; ++k) {
|
622 |
|
|
unsigned int num = rats[k].num;
|
623 |
|
|
unsigned int den;
|
624 |
|
|
unsigned int q = i->max;
|
625 |
|
|
int diff;
|
626 |
|
|
if (q == 0) {
|
627 |
|
|
i->empty = 1;
|
628 |
|
|
return -EINVAL;
|
629 |
|
|
}
|
630 |
|
|
den = div_up(num, q);
|
631 |
|
|
if (den > rats[k].den_max)
|
632 |
|
|
continue;
|
633 |
|
|
if (den < rats[k].den_min)
|
634 |
|
|
den = rats[k].den_min;
|
635 |
|
|
else {
|
636 |
|
|
unsigned int r;
|
637 |
|
|
r = (den - rats[k].den_min) % rats[k].den_step;
|
638 |
|
|
if (r != 0)
|
639 |
|
|
den += rats[k].den_step - r;
|
640 |
|
|
}
|
641 |
|
|
diff = q * den - num;
|
642 |
|
|
if (best_num == 0 ||
|
643 |
|
|
diff * best_den < best_diff * den) {
|
644 |
|
|
best_diff = diff;
|
645 |
|
|
best_den = den;
|
646 |
|
|
best_num = num;
|
647 |
|
|
}
|
648 |
|
|
}
|
649 |
|
|
if (best_den == 0) {
|
650 |
|
|
i->empty = 1;
|
651 |
|
|
return -EINVAL;
|
652 |
|
|
}
|
653 |
|
|
t.max = div_up(best_num, best_den);
|
654 |
|
|
t.openmax = !!(best_num % best_den);
|
655 |
|
|
t.integer = 0;
|
656 |
|
|
err = snd_interval_refine(i, &t);
|
657 |
|
|
if (err < 0)
|
658 |
|
|
return err;
|
659 |
|
|
|
660 |
|
|
if (snd_interval_single(i)) {
|
661 |
|
|
if (nump)
|
662 |
|
|
*nump = best_num;
|
663 |
|
|
if (denp)
|
664 |
|
|
*denp = best_den;
|
665 |
|
|
}
|
666 |
|
|
return err;
|
667 |
|
|
}
|
668 |
|
|
|
669 |
|
|
EXPORT_SYMBOL(snd_interval_ratnum);
|
670 |
|
|
|
671 |
|
|
/**
|
672 |
|
|
* snd_interval_ratden - refine the interval value
|
673 |
|
|
* @i: interval to refine
|
674 |
|
|
* @rats_count: number of struct ratden
|
675 |
|
|
* @rats: struct ratden array
|
676 |
|
|
* @nump: pointer to store the resultant numerator
|
677 |
|
|
* @denp: pointer to store the resultant denominator
|
678 |
|
|
*
|
679 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
680 |
|
|
*/
|
681 |
|
|
static int snd_interval_ratden(struct snd_interval *i,
|
682 |
|
|
unsigned int rats_count, struct snd_ratden *rats,
|
683 |
|
|
unsigned int *nump, unsigned int *denp)
|
684 |
|
|
{
|
685 |
|
|
unsigned int best_num, best_diff, best_den;
|
686 |
|
|
unsigned int k;
|
687 |
|
|
struct snd_interval t;
|
688 |
|
|
int err;
|
689 |
|
|
|
690 |
|
|
best_num = best_den = best_diff = 0;
|
691 |
|
|
for (k = 0; k < rats_count; ++k) {
|
692 |
|
|
unsigned int num;
|
693 |
|
|
unsigned int den = rats[k].den;
|
694 |
|
|
unsigned int q = i->min;
|
695 |
|
|
int diff;
|
696 |
|
|
num = mul(q, den);
|
697 |
|
|
if (num > rats[k].num_max)
|
698 |
|
|
continue;
|
699 |
|
|
if (num < rats[k].num_min)
|
700 |
|
|
num = rats[k].num_max;
|
701 |
|
|
else {
|
702 |
|
|
unsigned int r;
|
703 |
|
|
r = (num - rats[k].num_min) % rats[k].num_step;
|
704 |
|
|
if (r != 0)
|
705 |
|
|
num += rats[k].num_step - r;
|
706 |
|
|
}
|
707 |
|
|
diff = num - q * den;
|
708 |
|
|
if (best_num == 0 ||
|
709 |
|
|
diff * best_den < best_diff * den) {
|
710 |
|
|
best_diff = diff;
|
711 |
|
|
best_den = den;
|
712 |
|
|
best_num = num;
|
713 |
|
|
}
|
714 |
|
|
}
|
715 |
|
|
if (best_den == 0) {
|
716 |
|
|
i->empty = 1;
|
717 |
|
|
return -EINVAL;
|
718 |
|
|
}
|
719 |
|
|
t.min = div_down(best_num, best_den);
|
720 |
|
|
t.openmin = !!(best_num % best_den);
|
721 |
|
|
|
722 |
|
|
best_num = best_den = best_diff = 0;
|
723 |
|
|
for (k = 0; k < rats_count; ++k) {
|
724 |
|
|
unsigned int num;
|
725 |
|
|
unsigned int den = rats[k].den;
|
726 |
|
|
unsigned int q = i->max;
|
727 |
|
|
int diff;
|
728 |
|
|
num = mul(q, den);
|
729 |
|
|
if (num < rats[k].num_min)
|
730 |
|
|
continue;
|
731 |
|
|
if (num > rats[k].num_max)
|
732 |
|
|
num = rats[k].num_max;
|
733 |
|
|
else {
|
734 |
|
|
unsigned int r;
|
735 |
|
|
r = (num - rats[k].num_min) % rats[k].num_step;
|
736 |
|
|
if (r != 0)
|
737 |
|
|
num -= r;
|
738 |
|
|
}
|
739 |
|
|
diff = q * den - num;
|
740 |
|
|
if (best_num == 0 ||
|
741 |
|
|
diff * best_den < best_diff * den) {
|
742 |
|
|
best_diff = diff;
|
743 |
|
|
best_den = den;
|
744 |
|
|
best_num = num;
|
745 |
|
|
}
|
746 |
|
|
}
|
747 |
|
|
if (best_den == 0) {
|
748 |
|
|
i->empty = 1;
|
749 |
|
|
return -EINVAL;
|
750 |
|
|
}
|
751 |
|
|
t.max = div_up(best_num, best_den);
|
752 |
|
|
t.openmax = !!(best_num % best_den);
|
753 |
|
|
t.integer = 0;
|
754 |
|
|
err = snd_interval_refine(i, &t);
|
755 |
|
|
if (err < 0)
|
756 |
|
|
return err;
|
757 |
|
|
|
758 |
|
|
if (snd_interval_single(i)) {
|
759 |
|
|
if (nump)
|
760 |
|
|
*nump = best_num;
|
761 |
|
|
if (denp)
|
762 |
|
|
*denp = best_den;
|
763 |
|
|
}
|
764 |
|
|
return err;
|
765 |
|
|
}
|
766 |
|
|
|
767 |
|
|
/**
|
768 |
|
|
* snd_interval_list - refine the interval value from the list
|
769 |
|
|
* @i: the interval value to refine
|
770 |
|
|
* @count: the number of elements in the list
|
771 |
|
|
* @list: the value list
|
772 |
|
|
* @mask: the bit-mask to evaluate
|
773 |
|
|
*
|
774 |
|
|
* Refines the interval value from the list.
|
775 |
|
|
* When mask is non-zero, only the elements corresponding to bit 1 are
|
776 |
|
|
* evaluated.
|
777 |
|
|
*
|
778 |
|
|
* Returns non-zero if the value is changed, zero if not changed.
|
779 |
|
|
*/
|
780 |
|
|
int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask)
|
781 |
|
|
{
|
782 |
|
|
unsigned int k;
|
783 |
|
|
int changed = 0;
|
784 |
|
|
|
785 |
|
|
if (!count) {
|
786 |
|
|
i->empty = 1;
|
787 |
|
|
return -EINVAL;
|
788 |
|
|
}
|
789 |
|
|
for (k = 0; k < count; k++) {
|
790 |
|
|
if (mask && !(mask & (1 << k)))
|
791 |
|
|
continue;
|
792 |
|
|
if (i->min == list[k] && !i->openmin)
|
793 |
|
|
goto _l1;
|
794 |
|
|
if (i->min < list[k]) {
|
795 |
|
|
i->min = list[k];
|
796 |
|
|
i->openmin = 0;
|
797 |
|
|
changed = 1;
|
798 |
|
|
goto _l1;
|
799 |
|
|
}
|
800 |
|
|
}
|
801 |
|
|
i->empty = 1;
|
802 |
|
|
return -EINVAL;
|
803 |
|
|
_l1:
|
804 |
|
|
for (k = count; k-- > 0;) {
|
805 |
|
|
if (mask && !(mask & (1 << k)))
|
806 |
|
|
continue;
|
807 |
|
|
if (i->max == list[k] && !i->openmax)
|
808 |
|
|
goto _l2;
|
809 |
|
|
if (i->max > list[k]) {
|
810 |
|
|
i->max = list[k];
|
811 |
|
|
i->openmax = 0;
|
812 |
|
|
changed = 1;
|
813 |
|
|
goto _l2;
|
814 |
|
|
}
|
815 |
|
|
}
|
816 |
|
|
i->empty = 1;
|
817 |
|
|
return -EINVAL;
|
818 |
|
|
_l2:
|
819 |
|
|
if (snd_interval_checkempty(i)) {
|
820 |
|
|
i->empty = 1;
|
821 |
|
|
return -EINVAL;
|
822 |
|
|
}
|
823 |
|
|
return changed;
|
824 |
|
|
}
|
825 |
|
|
|
826 |
|
|
EXPORT_SYMBOL(snd_interval_list);
|
827 |
|
|
|
828 |
|
|
static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step)
|
829 |
|
|
{
|
830 |
|
|
unsigned int n;
|
831 |
|
|
int changed = 0;
|
832 |
|
|
n = (i->min - min) % step;
|
833 |
|
|
if (n != 0 || i->openmin) {
|
834 |
|
|
i->min += step - n;
|
835 |
|
|
changed = 1;
|
836 |
|
|
}
|
837 |
|
|
n = (i->max - min) % step;
|
838 |
|
|
if (n != 0 || i->openmax) {
|
839 |
|
|
i->max -= n;
|
840 |
|
|
changed = 1;
|
841 |
|
|
}
|
842 |
|
|
if (snd_interval_checkempty(i)) {
|
843 |
|
|
i->empty = 1;
|
844 |
|
|
return -EINVAL;
|
845 |
|
|
}
|
846 |
|
|
return changed;
|
847 |
|
|
}
|
848 |
|
|
|
849 |
|
|
/* Info constraints helpers */
|
850 |
|
|
|
851 |
|
|
/**
|
852 |
|
|
* snd_pcm_hw_rule_add - add the hw-constraint rule
|
853 |
|
|
* @runtime: the pcm runtime instance
|
854 |
|
|
* @cond: condition bits
|
855 |
|
|
* @var: the variable to evaluate
|
856 |
|
|
* @func: the evaluation function
|
857 |
|
|
* @private: the private data pointer passed to function
|
858 |
|
|
* @dep: the dependent variables
|
859 |
|
|
*
|
860 |
|
|
* Returns zero if successful, or a negative error code on failure.
|
861 |
|
|
*/
|
862 |
|
|
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
|
863 |
|
|
int var,
|
864 |
|
|
snd_pcm_hw_rule_func_t func, void *private,
|
865 |
|
|
int dep, ...)
|
866 |
|
|
{
|
867 |
|
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
868 |
|
|
struct snd_pcm_hw_rule *c;
|
869 |
|
|
unsigned int k;
|
870 |
|
|
va_list args;
|
871 |
|
|
va_start(args, dep);
|
872 |
|
|
if (constrs->rules_num >= constrs->rules_all) {
|
873 |
|
|
struct snd_pcm_hw_rule *new;
|
874 |
|
|
unsigned int new_rules = constrs->rules_all + 16;
|
875 |
|
|
new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL);
|
876 |
|
|
if (!new)
|
877 |
|
|
return -ENOMEM;
|
878 |
|
|
if (constrs->rules) {
|
879 |
|
|
memcpy(new, constrs->rules,
|
880 |
|
|
constrs->rules_num * sizeof(*c));
|
881 |
|
|
kfree(constrs->rules);
|
882 |
|
|
}
|
883 |
|
|
constrs->rules = new;
|
884 |
|
|
constrs->rules_all = new_rules;
|
885 |
|
|
}
|
886 |
|
|
c = &constrs->rules[constrs->rules_num];
|
887 |
|
|
c->cond = cond;
|
888 |
|
|
c->func = func;
|
889 |
|
|
c->var = var;
|
890 |
|
|
c->private = private;
|
891 |
|
|
k = 0;
|
892 |
|
|
while (1) {
|
893 |
|
|
snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL);
|
894 |
|
|
c->deps[k++] = dep;
|
895 |
|
|
if (dep < 0)
|
896 |
|
|
break;
|
897 |
|
|
dep = va_arg(args, int);
|
898 |
|
|
}
|
899 |
|
|
constrs->rules_num++;
|
900 |
|
|
va_end(args);
|
901 |
|
|
return 0;
|
902 |
|
|
}
|
903 |
|
|
|
904 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_rule_add);
|
905 |
|
|
|
906 |
|
|
/**
|
907 |
|
|
* snd_pcm_hw_constraint_mask
|
908 |
|
|
* @runtime: PCM runtime instance
|
909 |
|
|
* @var: hw_params variable to apply the mask
|
910 |
|
|
* @mask: the bitmap mask
|
911 |
|
|
*
|
912 |
|
|
* Apply the constraint of the given bitmap mask to a mask parameter.
|
913 |
|
|
*/
|
914 |
|
|
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
915 |
|
|
u_int32_t mask)
|
916 |
|
|
{
|
917 |
|
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
918 |
|
|
struct snd_mask *maskp = constrs_mask(constrs, var);
|
919 |
|
|
*maskp->bits &= mask;
|
920 |
|
|
memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */
|
921 |
|
|
if (*maskp->bits == 0)
|
922 |
|
|
return -EINVAL;
|
923 |
|
|
return 0;
|
924 |
|
|
}
|
925 |
|
|
|
926 |
|
|
/**
|
927 |
|
|
* snd_pcm_hw_constraint_mask64
|
928 |
|
|
* @runtime: PCM runtime instance
|
929 |
|
|
* @var: hw_params variable to apply the mask
|
930 |
|
|
* @mask: the 64bit bitmap mask
|
931 |
|
|
*
|
932 |
|
|
* Apply the constraint of the given bitmap mask to a mask parameter.
|
933 |
|
|
*/
|
934 |
|
|
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
935 |
|
|
u_int64_t mask)
|
936 |
|
|
{
|
937 |
|
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
938 |
|
|
struct snd_mask *maskp = constrs_mask(constrs, var);
|
939 |
|
|
maskp->bits[0] &= (u_int32_t)mask;
|
940 |
|
|
maskp->bits[1] &= (u_int32_t)(mask >> 32);
|
941 |
|
|
memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */
|
942 |
|
|
if (! maskp->bits[0] && ! maskp->bits[1])
|
943 |
|
|
return -EINVAL;
|
944 |
|
|
return 0;
|
945 |
|
|
}
|
946 |
|
|
|
947 |
|
|
/**
|
948 |
|
|
* snd_pcm_hw_constraint_integer
|
949 |
|
|
* @runtime: PCM runtime instance
|
950 |
|
|
* @var: hw_params variable to apply the integer constraint
|
951 |
|
|
*
|
952 |
|
|
* Apply the constraint of integer to an interval parameter.
|
953 |
|
|
*/
|
954 |
|
|
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var)
|
955 |
|
|
{
|
956 |
|
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
957 |
|
|
return snd_interval_setinteger(constrs_interval(constrs, var));
|
958 |
|
|
}
|
959 |
|
|
|
960 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
|
961 |
|
|
|
962 |
|
|
/**
|
963 |
|
|
* snd_pcm_hw_constraint_minmax
|
964 |
|
|
* @runtime: PCM runtime instance
|
965 |
|
|
* @var: hw_params variable to apply the range
|
966 |
|
|
* @min: the minimal value
|
967 |
|
|
* @max: the maximal value
|
968 |
|
|
*
|
969 |
|
|
* Apply the min/max range constraint to an interval parameter.
|
970 |
|
|
*/
|
971 |
|
|
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
972 |
|
|
unsigned int min, unsigned int max)
|
973 |
|
|
{
|
974 |
|
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
975 |
|
|
struct snd_interval t;
|
976 |
|
|
t.min = min;
|
977 |
|
|
t.max = max;
|
978 |
|
|
t.openmin = t.openmax = 0;
|
979 |
|
|
t.integer = 0;
|
980 |
|
|
return snd_interval_refine(constrs_interval(constrs, var), &t);
|
981 |
|
|
}
|
982 |
|
|
|
983 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax);
|
984 |
|
|
|
985 |
|
|
static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
|
986 |
|
|
struct snd_pcm_hw_rule *rule)
|
987 |
|
|
{
|
988 |
|
|
struct snd_pcm_hw_constraint_list *list = rule->private;
|
989 |
|
|
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask);
|
990 |
|
|
}
|
991 |
|
|
|
992 |
|
|
|
993 |
|
|
/**
|
994 |
|
|
* snd_pcm_hw_constraint_list
|
995 |
|
|
* @runtime: PCM runtime instance
|
996 |
|
|
* @cond: condition bits
|
997 |
|
|
* @var: hw_params variable to apply the list constraint
|
998 |
|
|
* @l: list
|
999 |
|
|
*
|
1000 |
|
|
* Apply the list of constraints to an interval parameter.
|
1001 |
|
|
*/
|
1002 |
|
|
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
|
1003 |
|
|
unsigned int cond,
|
1004 |
|
|
snd_pcm_hw_param_t var,
|
1005 |
|
|
struct snd_pcm_hw_constraint_list *l)
|
1006 |
|
|
{
|
1007 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
1008 |
|
|
snd_pcm_hw_rule_list, l,
|
1009 |
|
|
var, -1);
|
1010 |
|
|
}
|
1011 |
|
|
|
1012 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_list);
|
1013 |
|
|
|
1014 |
|
|
static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params,
|
1015 |
|
|
struct snd_pcm_hw_rule *rule)
|
1016 |
|
|
{
|
1017 |
|
|
struct snd_pcm_hw_constraint_ratnums *r = rule->private;
|
1018 |
|
|
unsigned int num = 0, den = 0;
|
1019 |
|
|
int err;
|
1020 |
|
|
err = snd_interval_ratnum(hw_param_interval(params, rule->var),
|
1021 |
|
|
r->nrats, r->rats, &num, &den);
|
1022 |
|
|
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
|
1023 |
|
|
params->rate_num = num;
|
1024 |
|
|
params->rate_den = den;
|
1025 |
|
|
}
|
1026 |
|
|
return err;
|
1027 |
|
|
}
|
1028 |
|
|
|
1029 |
|
|
/**
|
1030 |
|
|
* snd_pcm_hw_constraint_ratnums
|
1031 |
|
|
* @runtime: PCM runtime instance
|
1032 |
|
|
* @cond: condition bits
|
1033 |
|
|
* @var: hw_params variable to apply the ratnums constraint
|
1034 |
|
|
* @r: struct snd_ratnums constriants
|
1035 |
|
|
*/
|
1036 |
|
|
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
|
1037 |
|
|
unsigned int cond,
|
1038 |
|
|
snd_pcm_hw_param_t var,
|
1039 |
|
|
struct snd_pcm_hw_constraint_ratnums *r)
|
1040 |
|
|
{
|
1041 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
1042 |
|
|
snd_pcm_hw_rule_ratnums, r,
|
1043 |
|
|
var, -1);
|
1044 |
|
|
}
|
1045 |
|
|
|
1046 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums);
|
1047 |
|
|
|
1048 |
|
|
static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params,
|
1049 |
|
|
struct snd_pcm_hw_rule *rule)
|
1050 |
|
|
{
|
1051 |
|
|
struct snd_pcm_hw_constraint_ratdens *r = rule->private;
|
1052 |
|
|
unsigned int num = 0, den = 0;
|
1053 |
|
|
int err = snd_interval_ratden(hw_param_interval(params, rule->var),
|
1054 |
|
|
r->nrats, r->rats, &num, &den);
|
1055 |
|
|
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
|
1056 |
|
|
params->rate_num = num;
|
1057 |
|
|
params->rate_den = den;
|
1058 |
|
|
}
|
1059 |
|
|
return err;
|
1060 |
|
|
}
|
1061 |
|
|
|
1062 |
|
|
/**
|
1063 |
|
|
* snd_pcm_hw_constraint_ratdens
|
1064 |
|
|
* @runtime: PCM runtime instance
|
1065 |
|
|
* @cond: condition bits
|
1066 |
|
|
* @var: hw_params variable to apply the ratdens constraint
|
1067 |
|
|
* @r: struct snd_ratdens constriants
|
1068 |
|
|
*/
|
1069 |
|
|
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
|
1070 |
|
|
unsigned int cond,
|
1071 |
|
|
snd_pcm_hw_param_t var,
|
1072 |
|
|
struct snd_pcm_hw_constraint_ratdens *r)
|
1073 |
|
|
{
|
1074 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
1075 |
|
|
snd_pcm_hw_rule_ratdens, r,
|
1076 |
|
|
var, -1);
|
1077 |
|
|
}
|
1078 |
|
|
|
1079 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens);
|
1080 |
|
|
|
1081 |
|
|
static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
|
1082 |
|
|
struct snd_pcm_hw_rule *rule)
|
1083 |
|
|
{
|
1084 |
|
|
unsigned int l = (unsigned long) rule->private;
|
1085 |
|
|
int width = l & 0xffff;
|
1086 |
|
|
unsigned int msbits = l >> 16;
|
1087 |
|
|
struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
|
1088 |
|
|
if (snd_interval_single(i) && snd_interval_value(i) == width)
|
1089 |
|
|
params->msbits = msbits;
|
1090 |
|
|
return 0;
|
1091 |
|
|
}
|
1092 |
|
|
|
1093 |
|
|
/**
|
1094 |
|
|
* snd_pcm_hw_constraint_msbits
|
1095 |
|
|
* @runtime: PCM runtime instance
|
1096 |
|
|
* @cond: condition bits
|
1097 |
|
|
* @width: sample bits width
|
1098 |
|
|
* @msbits: msbits width
|
1099 |
|
|
*/
|
1100 |
|
|
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
|
1101 |
|
|
unsigned int cond,
|
1102 |
|
|
unsigned int width,
|
1103 |
|
|
unsigned int msbits)
|
1104 |
|
|
{
|
1105 |
|
|
unsigned long l = (msbits << 16) | width;
|
1106 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, -1,
|
1107 |
|
|
snd_pcm_hw_rule_msbits,
|
1108 |
|
|
(void*) l,
|
1109 |
|
|
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
|
1110 |
|
|
}
|
1111 |
|
|
|
1112 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits);
|
1113 |
|
|
|
1114 |
|
|
static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params,
|
1115 |
|
|
struct snd_pcm_hw_rule *rule)
|
1116 |
|
|
{
|
1117 |
|
|
unsigned long step = (unsigned long) rule->private;
|
1118 |
|
|
return snd_interval_step(hw_param_interval(params, rule->var), 0, step);
|
1119 |
|
|
}
|
1120 |
|
|
|
1121 |
|
|
/**
|
1122 |
|
|
* snd_pcm_hw_constraint_step
|
1123 |
|
|
* @runtime: PCM runtime instance
|
1124 |
|
|
* @cond: condition bits
|
1125 |
|
|
* @var: hw_params variable to apply the step constraint
|
1126 |
|
|
* @step: step size
|
1127 |
|
|
*/
|
1128 |
|
|
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
|
1129 |
|
|
unsigned int cond,
|
1130 |
|
|
snd_pcm_hw_param_t var,
|
1131 |
|
|
unsigned long step)
|
1132 |
|
|
{
|
1133 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
1134 |
|
|
snd_pcm_hw_rule_step, (void *) step,
|
1135 |
|
|
var, -1);
|
1136 |
|
|
}
|
1137 |
|
|
|
1138 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_step);
|
1139 |
|
|
|
1140 |
|
|
static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
|
1141 |
|
|
{
|
1142 |
|
|
static int pow2_sizes[] = {
|
1143 |
|
|
1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7,
|
1144 |
|
|
1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15,
|
1145 |
|
|
1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23,
|
1146 |
|
|
1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30
|
1147 |
|
|
};
|
1148 |
|
|
return snd_interval_list(hw_param_interval(params, rule->var),
|
1149 |
|
|
ARRAY_SIZE(pow2_sizes), pow2_sizes, 0);
|
1150 |
|
|
}
|
1151 |
|
|
|
1152 |
|
|
/**
|
1153 |
|
|
* snd_pcm_hw_constraint_pow2
|
1154 |
|
|
* @runtime: PCM runtime instance
|
1155 |
|
|
* @cond: condition bits
|
1156 |
|
|
* @var: hw_params variable to apply the power-of-2 constraint
|
1157 |
|
|
*/
|
1158 |
|
|
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
|
1159 |
|
|
unsigned int cond,
|
1160 |
|
|
snd_pcm_hw_param_t var)
|
1161 |
|
|
{
|
1162 |
|
|
return snd_pcm_hw_rule_add(runtime, cond, var,
|
1163 |
|
|
snd_pcm_hw_rule_pow2, NULL,
|
1164 |
|
|
var, -1);
|
1165 |
|
|
}
|
1166 |
|
|
|
1167 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
|
1168 |
|
|
|
1169 |
|
|
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params,
|
1170 |
|
|
snd_pcm_hw_param_t var)
|
1171 |
|
|
{
|
1172 |
|
|
if (hw_is_mask(var)) {
|
1173 |
|
|
snd_mask_any(hw_param_mask(params, var));
|
1174 |
|
|
params->cmask |= 1 << var;
|
1175 |
|
|
params->rmask |= 1 << var;
|
1176 |
|
|
return;
|
1177 |
|
|
}
|
1178 |
|
|
if (hw_is_interval(var)) {
|
1179 |
|
|
snd_interval_any(hw_param_interval(params, var));
|
1180 |
|
|
params->cmask |= 1 << var;
|
1181 |
|
|
params->rmask |= 1 << var;
|
1182 |
|
|
return;
|
1183 |
|
|
}
|
1184 |
|
|
snd_BUG();
|
1185 |
|
|
}
|
1186 |
|
|
|
1187 |
|
|
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params)
|
1188 |
|
|
{
|
1189 |
|
|
unsigned int k;
|
1190 |
|
|
memset(params, 0, sizeof(*params));
|
1191 |
|
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++)
|
1192 |
|
|
_snd_pcm_hw_param_any(params, k);
|
1193 |
|
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
|
1194 |
|
|
_snd_pcm_hw_param_any(params, k);
|
1195 |
|
|
params->info = ~0U;
|
1196 |
|
|
}
|
1197 |
|
|
|
1198 |
|
|
EXPORT_SYMBOL(_snd_pcm_hw_params_any);
|
1199 |
|
|
|
1200 |
|
|
/**
|
1201 |
|
|
* snd_pcm_hw_param_value
|
1202 |
|
|
* @params: the hw_params instance
|
1203 |
|
|
* @var: parameter to retrieve
|
1204 |
|
|
* @dir: pointer to the direction (-1,0,1) or NULL
|
1205 |
|
|
*
|
1206 |
|
|
* Return the value for field PAR if it's fixed in configuration space
|
1207 |
|
|
* defined by PARAMS. Return -EINVAL otherwise
|
1208 |
|
|
*/
|
1209 |
|
|
int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
|
1210 |
|
|
snd_pcm_hw_param_t var, int *dir)
|
1211 |
|
|
{
|
1212 |
|
|
if (hw_is_mask(var)) {
|
1213 |
|
|
const struct snd_mask *mask = hw_param_mask_c(params, var);
|
1214 |
|
|
if (!snd_mask_single(mask))
|
1215 |
|
|
return -EINVAL;
|
1216 |
|
|
if (dir)
|
1217 |
|
|
*dir = 0;
|
1218 |
|
|
return snd_mask_value(mask);
|
1219 |
|
|
}
|
1220 |
|
|
if (hw_is_interval(var)) {
|
1221 |
|
|
const struct snd_interval *i = hw_param_interval_c(params, var);
|
1222 |
|
|
if (!snd_interval_single(i))
|
1223 |
|
|
return -EINVAL;
|
1224 |
|
|
if (dir)
|
1225 |
|
|
*dir = i->openmin;
|
1226 |
|
|
return snd_interval_value(i);
|
1227 |
|
|
}
|
1228 |
|
|
return -EINVAL;
|
1229 |
|
|
}
|
1230 |
|
|
|
1231 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_value);
|
1232 |
|
|
|
1233 |
|
|
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params,
|
1234 |
|
|
snd_pcm_hw_param_t var)
|
1235 |
|
|
{
|
1236 |
|
|
if (hw_is_mask(var)) {
|
1237 |
|
|
snd_mask_none(hw_param_mask(params, var));
|
1238 |
|
|
params->cmask |= 1 << var;
|
1239 |
|
|
params->rmask |= 1 << var;
|
1240 |
|
|
} else if (hw_is_interval(var)) {
|
1241 |
|
|
snd_interval_none(hw_param_interval(params, var));
|
1242 |
|
|
params->cmask |= 1 << var;
|
1243 |
|
|
params->rmask |= 1 << var;
|
1244 |
|
|
} else {
|
1245 |
|
|
snd_BUG();
|
1246 |
|
|
}
|
1247 |
|
|
}
|
1248 |
|
|
|
1249 |
|
|
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
|
1250 |
|
|
|
1251 |
|
|
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
|
1252 |
|
|
snd_pcm_hw_param_t var)
|
1253 |
|
|
{
|
1254 |
|
|
int changed;
|
1255 |
|
|
if (hw_is_mask(var))
|
1256 |
|
|
changed = snd_mask_refine_first(hw_param_mask(params, var));
|
1257 |
|
|
else if (hw_is_interval(var))
|
1258 |
|
|
changed = snd_interval_refine_first(hw_param_interval(params, var));
|
1259 |
|
|
else
|
1260 |
|
|
return -EINVAL;
|
1261 |
|
|
if (changed) {
|
1262 |
|
|
params->cmask |= 1 << var;
|
1263 |
|
|
params->rmask |= 1 << var;
|
1264 |
|
|
}
|
1265 |
|
|
return changed;
|
1266 |
|
|
}
|
1267 |
|
|
|
1268 |
|
|
|
1269 |
|
|
/**
|
1270 |
|
|
* snd_pcm_hw_param_first
|
1271 |
|
|
* @pcm: PCM instance
|
1272 |
|
|
* @params: the hw_params instance
|
1273 |
|
|
* @var: parameter to retrieve
|
1274 |
|
|
* @dir: pointer to the direction (-1,0,1) or NULL
|
1275 |
|
|
*
|
1276 |
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
1277 |
|
|
* values > minimum. Reduce configuration space accordingly.
|
1278 |
|
|
* Return the minimum.
|
1279 |
|
|
*/
|
1280 |
|
|
int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
|
1281 |
|
|
struct snd_pcm_hw_params *params,
|
1282 |
|
|
snd_pcm_hw_param_t var, int *dir)
|
1283 |
|
|
{
|
1284 |
|
|
int changed = _snd_pcm_hw_param_first(params, var);
|
1285 |
|
|
if (changed < 0)
|
1286 |
|
|
return changed;
|
1287 |
|
|
if (params->rmask) {
|
1288 |
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
1289 |
|
|
snd_assert(err >= 0, return err);
|
1290 |
|
|
}
|
1291 |
|
|
return snd_pcm_hw_param_value(params, var, dir);
|
1292 |
|
|
}
|
1293 |
|
|
|
1294 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_first);
|
1295 |
|
|
|
1296 |
|
|
static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
|
1297 |
|
|
snd_pcm_hw_param_t var)
|
1298 |
|
|
{
|
1299 |
|
|
int changed;
|
1300 |
|
|
if (hw_is_mask(var))
|
1301 |
|
|
changed = snd_mask_refine_last(hw_param_mask(params, var));
|
1302 |
|
|
else if (hw_is_interval(var))
|
1303 |
|
|
changed = snd_interval_refine_last(hw_param_interval(params, var));
|
1304 |
|
|
else
|
1305 |
|
|
return -EINVAL;
|
1306 |
|
|
if (changed) {
|
1307 |
|
|
params->cmask |= 1 << var;
|
1308 |
|
|
params->rmask |= 1 << var;
|
1309 |
|
|
}
|
1310 |
|
|
return changed;
|
1311 |
|
|
}
|
1312 |
|
|
|
1313 |
|
|
|
1314 |
|
|
/**
|
1315 |
|
|
* snd_pcm_hw_param_last
|
1316 |
|
|
* @pcm: PCM instance
|
1317 |
|
|
* @params: the hw_params instance
|
1318 |
|
|
* @var: parameter to retrieve
|
1319 |
|
|
* @dir: pointer to the direction (-1,0,1) or NULL
|
1320 |
|
|
*
|
1321 |
|
|
* Inside configuration space defined by PARAMS remove from PAR all
|
1322 |
|
|
* values < maximum. Reduce configuration space accordingly.
|
1323 |
|
|
* Return the maximum.
|
1324 |
|
|
*/
|
1325 |
|
|
int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
|
1326 |
|
|
struct snd_pcm_hw_params *params,
|
1327 |
|
|
snd_pcm_hw_param_t var, int *dir)
|
1328 |
|
|
{
|
1329 |
|
|
int changed = _snd_pcm_hw_param_last(params, var);
|
1330 |
|
|
if (changed < 0)
|
1331 |
|
|
return changed;
|
1332 |
|
|
if (params->rmask) {
|
1333 |
|
|
int err = snd_pcm_hw_refine(pcm, params);
|
1334 |
|
|
snd_assert(err >= 0, return err);
|
1335 |
|
|
}
|
1336 |
|
|
return snd_pcm_hw_param_value(params, var, dir);
|
1337 |
|
|
}
|
1338 |
|
|
|
1339 |
|
|
EXPORT_SYMBOL(snd_pcm_hw_param_last);
|
1340 |
|
|
|
1341 |
|
|
/**
|
1342 |
|
|
* snd_pcm_hw_param_choose
|
1343 |
|
|
* @pcm: PCM instance
|
1344 |
|
|
* @params: the hw_params instance
|
1345 |
|
|
*
|
1346 |
|
|
* Choose one configuration from configuration space defined by PARAMS
|
1347 |
|
|
* The configuration chosen is that obtained fixing in this order:
|
1348 |
|
|
* first access, first format, first subformat, min channels,
|
1349 |
|
|
* min rate, min period time, max buffer size, min tick time
|
1350 |
|
|
*/
|
1351 |
|
|
int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
|
1352 |
|
|
struct snd_pcm_hw_params *params)
|
1353 |
|
|
{
|
1354 |
|
|
static int vars[] = {
|
1355 |
|
|
SNDRV_PCM_HW_PARAM_ACCESS,
|
1356 |
|
|
SNDRV_PCM_HW_PARAM_FORMAT,
|
1357 |
|
|
SNDRV_PCM_HW_PARAM_SUBFORMAT,
|
1358 |
|
|
SNDRV_PCM_HW_PARAM_CHANNELS,
|
1359 |
|
|
SNDRV_PCM_HW_PARAM_RATE,
|
1360 |
|
|
SNDRV_PCM_HW_PARAM_PERIOD_TIME,
|
1361 |
|
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
1362 |
|
|
SNDRV_PCM_HW_PARAM_TICK_TIME,
|
1363 |
|
|
-1
|
1364 |
|
|
};
|
1365 |
|
|
int err, *v;
|
1366 |
|
|
|
1367 |
|
|
for (v = vars; *v != -1; v++) {
|
1368 |
|
|
if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
|
1369 |
|
|
err = snd_pcm_hw_param_first(pcm, params, *v, NULL);
|
1370 |
|
|
else
|
1371 |
|
|
err = snd_pcm_hw_param_last(pcm, params, *v, NULL);
|
1372 |
|
|
snd_assert(err >= 0, return err);
|
1373 |
|
|
}
|
1374 |
|
|
return 0;
|
1375 |
|
|
}
|
1376 |
|
|
|
1377 |
|
|
static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream,
|
1378 |
|
|
void *arg)
|
1379 |
|
|
{
|
1380 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1381 |
|
|
unsigned long flags;
|
1382 |
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
1383 |
|
|
if (snd_pcm_running(substream) &&
|
1384 |
|
|
snd_pcm_update_hw_ptr(substream) >= 0)
|
1385 |
|
|
runtime->status->hw_ptr %= runtime->buffer_size;
|
1386 |
|
|
else
|
1387 |
|
|
runtime->status->hw_ptr = 0;
|
1388 |
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
1389 |
|
|
return 0;
|
1390 |
|
|
}
|
1391 |
|
|
|
1392 |
|
|
static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream,
|
1393 |
|
|
void *arg)
|
1394 |
|
|
{
|
1395 |
|
|
struct snd_pcm_channel_info *info = arg;
|
1396 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1397 |
|
|
int width;
|
1398 |
|
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) {
|
1399 |
|
|
info->offset = -1;
|
1400 |
|
|
return 0;
|
1401 |
|
|
}
|
1402 |
|
|
width = snd_pcm_format_physical_width(runtime->format);
|
1403 |
|
|
if (width < 0)
|
1404 |
|
|
return width;
|
1405 |
|
|
info->offset = 0;
|
1406 |
|
|
switch (runtime->access) {
|
1407 |
|
|
case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED:
|
1408 |
|
|
case SNDRV_PCM_ACCESS_RW_INTERLEAVED:
|
1409 |
|
|
info->first = info->channel * width;
|
1410 |
|
|
info->step = runtime->channels * width;
|
1411 |
|
|
break;
|
1412 |
|
|
case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED:
|
1413 |
|
|
case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED:
|
1414 |
|
|
{
|
1415 |
|
|
size_t size = runtime->dma_bytes / runtime->channels;
|
1416 |
|
|
info->first = info->channel * size * 8;
|
1417 |
|
|
info->step = width;
|
1418 |
|
|
break;
|
1419 |
|
|
}
|
1420 |
|
|
default:
|
1421 |
|
|
snd_BUG();
|
1422 |
|
|
break;
|
1423 |
|
|
}
|
1424 |
|
|
return 0;
|
1425 |
|
|
}
|
1426 |
|
|
|
1427 |
|
|
/**
|
1428 |
|
|
* snd_pcm_lib_ioctl - a generic PCM ioctl callback
|
1429 |
|
|
* @substream: the pcm substream instance
|
1430 |
|
|
* @cmd: ioctl command
|
1431 |
|
|
* @arg: ioctl argument
|
1432 |
|
|
*
|
1433 |
|
|
* Processes the generic ioctl commands for PCM.
|
1434 |
|
|
* Can be passed as the ioctl callback for PCM ops.
|
1435 |
|
|
*
|
1436 |
|
|
* Returns zero if successful, or a negative error code on failure.
|
1437 |
|
|
*/
|
1438 |
|
|
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
|
1439 |
|
|
unsigned int cmd, void *arg)
|
1440 |
|
|
{
|
1441 |
|
|
switch (cmd) {
|
1442 |
|
|
case SNDRV_PCM_IOCTL1_INFO:
|
1443 |
|
|
return 0;
|
1444 |
|
|
case SNDRV_PCM_IOCTL1_RESET:
|
1445 |
|
|
return snd_pcm_lib_ioctl_reset(substream, arg);
|
1446 |
|
|
case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
|
1447 |
|
|
return snd_pcm_lib_ioctl_channel_info(substream, arg);
|
1448 |
|
|
}
|
1449 |
|
|
return -ENXIO;
|
1450 |
|
|
}
|
1451 |
|
|
|
1452 |
|
|
EXPORT_SYMBOL(snd_pcm_lib_ioctl);
|
1453 |
|
|
|
1454 |
|
|
/*
|
1455 |
|
|
* Conditions
|
1456 |
|
|
*/
|
1457 |
|
|
|
1458 |
|
|
static void snd_pcm_system_tick_set(struct snd_pcm_substream *substream,
|
1459 |
|
|
unsigned long ticks)
|
1460 |
|
|
{
|
1461 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1462 |
|
|
if (ticks == 0)
|
1463 |
|
|
del_timer(&runtime->tick_timer);
|
1464 |
|
|
else {
|
1465 |
|
|
ticks += (1000000 / HZ) - 1;
|
1466 |
|
|
ticks /= (1000000 / HZ);
|
1467 |
|
|
mod_timer(&runtime->tick_timer, jiffies + ticks);
|
1468 |
|
|
}
|
1469 |
|
|
}
|
1470 |
|
|
|
1471 |
|
|
/* Temporary alias */
|
1472 |
|
|
void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks)
|
1473 |
|
|
{
|
1474 |
|
|
snd_pcm_system_tick_set(substream, ticks);
|
1475 |
|
|
}
|
1476 |
|
|
|
1477 |
|
|
void snd_pcm_tick_prepare(struct snd_pcm_substream *substream)
|
1478 |
|
|
{
|
1479 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1480 |
|
|
snd_pcm_uframes_t frames = ULONG_MAX;
|
1481 |
|
|
snd_pcm_uframes_t avail, dist;
|
1482 |
|
|
unsigned int ticks;
|
1483 |
|
|
u_int64_t n;
|
1484 |
|
|
u_int32_t r;
|
1485 |
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
1486 |
|
|
if (runtime->silence_size >= runtime->boundary) {
|
1487 |
|
|
frames = 1;
|
1488 |
|
|
} else if (runtime->silence_size > 0 &&
|
1489 |
|
|
runtime->silence_filled < runtime->buffer_size) {
|
1490 |
|
|
snd_pcm_sframes_t noise_dist;
|
1491 |
|
|
noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
|
1492 |
|
|
if (noise_dist > (snd_pcm_sframes_t)runtime->silence_threshold)
|
1493 |
|
|
frames = noise_dist - runtime->silence_threshold;
|
1494 |
|
|
}
|
1495 |
|
|
avail = snd_pcm_playback_avail(runtime);
|
1496 |
|
|
} else {
|
1497 |
|
|
avail = snd_pcm_capture_avail(runtime);
|
1498 |
|
|
}
|
1499 |
|
|
if (avail < runtime->control->avail_min) {
|
1500 |
|
|
snd_pcm_sframes_t n = runtime->control->avail_min - avail;
|
1501 |
|
|
if (n > 0 && frames > (snd_pcm_uframes_t)n)
|
1502 |
|
|
frames = n;
|
1503 |
|
|
}
|
1504 |
|
|
if (avail < runtime->buffer_size) {
|
1505 |
|
|
snd_pcm_sframes_t n = runtime->buffer_size - avail;
|
1506 |
|
|
if (n > 0 && frames > (snd_pcm_uframes_t)n)
|
1507 |
|
|
frames = n;
|
1508 |
|
|
}
|
1509 |
|
|
if (frames == ULONG_MAX) {
|
1510 |
|
|
snd_pcm_tick_set(substream, 0);
|
1511 |
|
|
return;
|
1512 |
|
|
}
|
1513 |
|
|
dist = runtime->status->hw_ptr - runtime->hw_ptr_base;
|
1514 |
|
|
/* Distance to next interrupt */
|
1515 |
|
|
dist = runtime->period_size - dist % runtime->period_size;
|
1516 |
|
|
if (dist <= frames) {
|
1517 |
|
|
snd_pcm_tick_set(substream, 0);
|
1518 |
|
|
return;
|
1519 |
|
|
}
|
1520 |
|
|
/* the base time is us */
|
1521 |
|
|
n = frames;
|
1522 |
|
|
n *= 1000000;
|
1523 |
|
|
div64_32(&n, runtime->tick_time * runtime->rate, &r);
|
1524 |
|
|
ticks = n + (r > 0 ? 1 : 0);
|
1525 |
|
|
if (ticks < runtime->sleep_min)
|
1526 |
|
|
ticks = runtime->sleep_min;
|
1527 |
|
|
snd_pcm_tick_set(substream, (unsigned long) ticks);
|
1528 |
|
|
}
|
1529 |
|
|
|
1530 |
|
|
void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream)
|
1531 |
|
|
{
|
1532 |
|
|
struct snd_pcm_runtime *runtime;
|
1533 |
|
|
unsigned long flags;
|
1534 |
|
|
|
1535 |
|
|
snd_assert(substream != NULL, return);
|
1536 |
|
|
runtime = substream->runtime;
|
1537 |
|
|
snd_assert(runtime != NULL, return);
|
1538 |
|
|
|
1539 |
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
1540 |
|
|
if (!snd_pcm_running(substream) ||
|
1541 |
|
|
snd_pcm_update_hw_ptr(substream) < 0)
|
1542 |
|
|
goto _end;
|
1543 |
|
|
if (runtime->sleep_min)
|
1544 |
|
|
snd_pcm_tick_prepare(substream);
|
1545 |
|
|
_end:
|
1546 |
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
1547 |
|
|
}
|
1548 |
|
|
|
1549 |
|
|
/**
|
1550 |
|
|
* snd_pcm_period_elapsed - update the pcm status for the next period
|
1551 |
|
|
* @substream: the pcm substream instance
|
1552 |
|
|
*
|
1553 |
|
|
* This function is called from the interrupt handler when the
|
1554 |
|
|
* PCM has processed the period size. It will update the current
|
1555 |
|
|
* pointer, set up the tick, wake up sleepers, etc.
|
1556 |
|
|
*
|
1557 |
|
|
* Even if more than one periods have elapsed since the last call, you
|
1558 |
|
|
* have to call this only once.
|
1559 |
|
|
*/
|
1560 |
|
|
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
|
1561 |
|
|
{
|
1562 |
|
|
struct snd_pcm_runtime *runtime;
|
1563 |
|
|
unsigned long flags;
|
1564 |
|
|
|
1565 |
|
|
snd_assert(substream != NULL, return);
|
1566 |
|
|
runtime = substream->runtime;
|
1567 |
|
|
snd_assert(runtime != NULL, return);
|
1568 |
|
|
|
1569 |
|
|
if (runtime->transfer_ack_begin)
|
1570 |
|
|
runtime->transfer_ack_begin(substream);
|
1571 |
|
|
|
1572 |
|
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
1573 |
|
|
if (!snd_pcm_running(substream) ||
|
1574 |
|
|
snd_pcm_update_hw_ptr_interrupt(substream) < 0)
|
1575 |
|
|
goto _end;
|
1576 |
|
|
|
1577 |
|
|
if (substream->timer_running)
|
1578 |
|
|
snd_timer_interrupt(substream->timer, 1);
|
1579 |
|
|
if (runtime->sleep_min)
|
1580 |
|
|
snd_pcm_tick_prepare(substream);
|
1581 |
|
|
_end:
|
1582 |
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
1583 |
|
|
if (runtime->transfer_ack_end)
|
1584 |
|
|
runtime->transfer_ack_end(substream);
|
1585 |
|
|
kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
|
1586 |
|
|
}
|
1587 |
|
|
|
1588 |
|
|
EXPORT_SYMBOL(snd_pcm_period_elapsed);
|
1589 |
|
|
|
1590 |
|
|
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
|
1591 |
|
|
unsigned int hwoff,
|
1592 |
|
|
unsigned long data, unsigned int off,
|
1593 |
|
|
snd_pcm_uframes_t frames)
|
1594 |
|
|
{
|
1595 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1596 |
|
|
int err;
|
1597 |
|
|
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
|
1598 |
|
|
if (substream->ops->copy) {
|
1599 |
|
|
if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0)
|
1600 |
|
|
return err;
|
1601 |
|
|
} else {
|
1602 |
|
|
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
|
1603 |
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
1604 |
|
|
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
|
1605 |
|
|
return -EFAULT;
|
1606 |
|
|
}
|
1607 |
|
|
return 0;
|
1608 |
|
|
}
|
1609 |
|
|
|
1610 |
|
|
typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff,
|
1611 |
|
|
unsigned long data, unsigned int off,
|
1612 |
|
|
snd_pcm_uframes_t size);
|
1613 |
|
|
|
1614 |
|
|
static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
|
1615 |
|
|
unsigned long data,
|
1616 |
|
|
snd_pcm_uframes_t size,
|
1617 |
|
|
int nonblock,
|
1618 |
|
|
transfer_f transfer)
|
1619 |
|
|
{
|
1620 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1621 |
|
|
snd_pcm_uframes_t xfer = 0;
|
1622 |
|
|
snd_pcm_uframes_t offset = 0;
|
1623 |
|
|
int err = 0;
|
1624 |
|
|
|
1625 |
|
|
if (size == 0)
|
1626 |
|
|
return 0;
|
1627 |
|
|
if (size > runtime->xfer_align)
|
1628 |
|
|
size -= size % runtime->xfer_align;
|
1629 |
|
|
|
1630 |
|
|
snd_pcm_stream_lock_irq(substream);
|
1631 |
|
|
switch (runtime->status->state) {
|
1632 |
|
|
case SNDRV_PCM_STATE_PREPARED:
|
1633 |
|
|
case SNDRV_PCM_STATE_RUNNING:
|
1634 |
|
|
case SNDRV_PCM_STATE_PAUSED:
|
1635 |
|
|
break;
|
1636 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
1637 |
|
|
err = -EPIPE;
|
1638 |
|
|
goto _end_unlock;
|
1639 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
1640 |
|
|
err = -ESTRPIPE;
|
1641 |
|
|
goto _end_unlock;
|
1642 |
|
|
default:
|
1643 |
|
|
err = -EBADFD;
|
1644 |
|
|
goto _end_unlock;
|
1645 |
|
|
}
|
1646 |
|
|
|
1647 |
|
|
while (size > 0) {
|
1648 |
|
|
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
|
1649 |
|
|
snd_pcm_uframes_t avail;
|
1650 |
|
|
snd_pcm_uframes_t cont;
|
1651 |
|
|
if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
1652 |
|
|
snd_pcm_update_hw_ptr(substream);
|
1653 |
|
|
avail = snd_pcm_playback_avail(runtime);
|
1654 |
|
|
if (((avail < runtime->control->avail_min && size > avail) ||
|
1655 |
|
|
(size >= runtime->xfer_align && avail < runtime->xfer_align))) {
|
1656 |
|
|
wait_queue_t wait;
|
1657 |
|
|
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
|
1658 |
|
|
long tout;
|
1659 |
|
|
|
1660 |
|
|
if (nonblock) {
|
1661 |
|
|
err = -EAGAIN;
|
1662 |
|
|
goto _end_unlock;
|
1663 |
|
|
}
|
1664 |
|
|
|
1665 |
|
|
init_waitqueue_entry(&wait, current);
|
1666 |
|
|
add_wait_queue(&runtime->sleep, &wait);
|
1667 |
|
|
while (1) {
|
1668 |
|
|
if (signal_pending(current)) {
|
1669 |
|
|
state = SIGNALED;
|
1670 |
|
|
break;
|
1671 |
|
|
}
|
1672 |
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
1673 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
1674 |
|
|
tout = schedule_timeout(10 * HZ);
|
1675 |
|
|
snd_pcm_stream_lock_irq(substream);
|
1676 |
|
|
if (tout == 0) {
|
1677 |
|
|
if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
|
1678 |
|
|
runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
|
1679 |
|
|
state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
|
1680 |
|
|
break;
|
1681 |
|
|
}
|
1682 |
|
|
}
|
1683 |
|
|
switch (runtime->status->state) {
|
1684 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
1685 |
|
|
case SNDRV_PCM_STATE_DRAINING:
|
1686 |
|
|
state = ERROR;
|
1687 |
|
|
goto _end_loop;
|
1688 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
1689 |
|
|
state = SUSPENDED;
|
1690 |
|
|
goto _end_loop;
|
1691 |
|
|
case SNDRV_PCM_STATE_SETUP:
|
1692 |
|
|
state = DROPPED;
|
1693 |
|
|
goto _end_loop;
|
1694 |
|
|
default:
|
1695 |
|
|
break;
|
1696 |
|
|
}
|
1697 |
|
|
avail = snd_pcm_playback_avail(runtime);
|
1698 |
|
|
if (avail >= runtime->control->avail_min) {
|
1699 |
|
|
state = READY;
|
1700 |
|
|
break;
|
1701 |
|
|
}
|
1702 |
|
|
}
|
1703 |
|
|
_end_loop:
|
1704 |
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
1705 |
|
|
|
1706 |
|
|
switch (state) {
|
1707 |
|
|
case ERROR:
|
1708 |
|
|
err = -EPIPE;
|
1709 |
|
|
goto _end_unlock;
|
1710 |
|
|
case SUSPENDED:
|
1711 |
|
|
err = -ESTRPIPE;
|
1712 |
|
|
goto _end_unlock;
|
1713 |
|
|
case SIGNALED:
|
1714 |
|
|
err = -ERESTARTSYS;
|
1715 |
|
|
goto _end_unlock;
|
1716 |
|
|
case EXPIRED:
|
1717 |
|
|
snd_printd("playback write error (DMA or IRQ trouble?)\n");
|
1718 |
|
|
err = -EIO;
|
1719 |
|
|
goto _end_unlock;
|
1720 |
|
|
case DROPPED:
|
1721 |
|
|
err = -EBADFD;
|
1722 |
|
|
goto _end_unlock;
|
1723 |
|
|
default:
|
1724 |
|
|
break;
|
1725 |
|
|
}
|
1726 |
|
|
}
|
1727 |
|
|
if (avail > runtime->xfer_align)
|
1728 |
|
|
avail -= avail % runtime->xfer_align;
|
1729 |
|
|
frames = size > avail ? avail : size;
|
1730 |
|
|
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
|
1731 |
|
|
if (frames > cont)
|
1732 |
|
|
frames = cont;
|
1733 |
|
|
snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
|
1734 |
|
|
appl_ptr = runtime->control->appl_ptr;
|
1735 |
|
|
appl_ofs = appl_ptr % runtime->buffer_size;
|
1736 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
1737 |
|
|
if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0)
|
1738 |
|
|
goto _end;
|
1739 |
|
|
snd_pcm_stream_lock_irq(substream);
|
1740 |
|
|
switch (runtime->status->state) {
|
1741 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
1742 |
|
|
err = -EPIPE;
|
1743 |
|
|
goto _end_unlock;
|
1744 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
1745 |
|
|
err = -ESTRPIPE;
|
1746 |
|
|
goto _end_unlock;
|
1747 |
|
|
default:
|
1748 |
|
|
break;
|
1749 |
|
|
}
|
1750 |
|
|
appl_ptr += frames;
|
1751 |
|
|
if (appl_ptr >= runtime->boundary)
|
1752 |
|
|
appl_ptr -= runtime->boundary;
|
1753 |
|
|
runtime->control->appl_ptr = appl_ptr;
|
1754 |
|
|
if (substream->ops->ack)
|
1755 |
|
|
substream->ops->ack(substream);
|
1756 |
|
|
|
1757 |
|
|
offset += frames;
|
1758 |
|
|
size -= frames;
|
1759 |
|
|
xfer += frames;
|
1760 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED &&
|
1761 |
|
|
snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) {
|
1762 |
|
|
err = snd_pcm_start(substream);
|
1763 |
|
|
if (err < 0)
|
1764 |
|
|
goto _end_unlock;
|
1765 |
|
|
}
|
1766 |
|
|
if (runtime->sleep_min &&
|
1767 |
|
|
runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
1768 |
|
|
snd_pcm_tick_prepare(substream);
|
1769 |
|
|
}
|
1770 |
|
|
_end_unlock:
|
1771 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
1772 |
|
|
_end:
|
1773 |
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
|
1774 |
|
|
}
|
1775 |
|
|
|
1776 |
|
|
snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
|
1777 |
|
|
{
|
1778 |
|
|
struct snd_pcm_runtime *runtime;
|
1779 |
|
|
int nonblock;
|
1780 |
|
|
|
1781 |
|
|
snd_assert(substream != NULL, return -ENXIO);
|
1782 |
|
|
runtime = substream->runtime;
|
1783 |
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
1784 |
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
1785 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
1786 |
|
|
return -EBADFD;
|
1787 |
|
|
|
1788 |
|
|
nonblock = !!(substream->f_flags & O_NONBLOCK);
|
1789 |
|
|
|
1790 |
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
|
1791 |
|
|
runtime->channels > 1)
|
1792 |
|
|
return -EINVAL;
|
1793 |
|
|
return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock,
|
1794 |
|
|
snd_pcm_lib_write_transfer);
|
1795 |
|
|
}
|
1796 |
|
|
|
1797 |
|
|
EXPORT_SYMBOL(snd_pcm_lib_write);
|
1798 |
|
|
|
1799 |
|
|
static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
|
1800 |
|
|
unsigned int hwoff,
|
1801 |
|
|
unsigned long data, unsigned int off,
|
1802 |
|
|
snd_pcm_uframes_t frames)
|
1803 |
|
|
{
|
1804 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1805 |
|
|
int err;
|
1806 |
|
|
void __user **bufs = (void __user **)data;
|
1807 |
|
|
int channels = runtime->channels;
|
1808 |
|
|
int c;
|
1809 |
|
|
if (substream->ops->copy) {
|
1810 |
|
|
snd_assert(substream->ops->silence != NULL, return -EINVAL);
|
1811 |
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
1812 |
|
|
if (*bufs == NULL) {
|
1813 |
|
|
if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0)
|
1814 |
|
|
return err;
|
1815 |
|
|
} else {
|
1816 |
|
|
char __user *buf = *bufs + samples_to_bytes(runtime, off);
|
1817 |
|
|
if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0)
|
1818 |
|
|
return err;
|
1819 |
|
|
}
|
1820 |
|
|
}
|
1821 |
|
|
} else {
|
1822 |
|
|
/* default transfer behaviour */
|
1823 |
|
|
size_t dma_csize = runtime->dma_bytes / channels;
|
1824 |
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
1825 |
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
1826 |
|
|
char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
|
1827 |
|
|
if (*bufs == NULL) {
|
1828 |
|
|
snd_pcm_format_set_silence(runtime->format, hwbuf, frames);
|
1829 |
|
|
} else {
|
1830 |
|
|
char __user *buf = *bufs + samples_to_bytes(runtime, off);
|
1831 |
|
|
if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames)))
|
1832 |
|
|
return -EFAULT;
|
1833 |
|
|
}
|
1834 |
|
|
}
|
1835 |
|
|
}
|
1836 |
|
|
return 0;
|
1837 |
|
|
}
|
1838 |
|
|
|
1839 |
|
|
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
|
1840 |
|
|
void __user **bufs,
|
1841 |
|
|
snd_pcm_uframes_t frames)
|
1842 |
|
|
{
|
1843 |
|
|
struct snd_pcm_runtime *runtime;
|
1844 |
|
|
int nonblock;
|
1845 |
|
|
|
1846 |
|
|
snd_assert(substream != NULL, return -ENXIO);
|
1847 |
|
|
runtime = substream->runtime;
|
1848 |
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
1849 |
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
1850 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
1851 |
|
|
return -EBADFD;
|
1852 |
|
|
|
1853 |
|
|
nonblock = !!(substream->f_flags & O_NONBLOCK);
|
1854 |
|
|
|
1855 |
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
1856 |
|
|
return -EINVAL;
|
1857 |
|
|
return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames,
|
1858 |
|
|
nonblock, snd_pcm_lib_writev_transfer);
|
1859 |
|
|
}
|
1860 |
|
|
|
1861 |
|
|
EXPORT_SYMBOL(snd_pcm_lib_writev);
|
1862 |
|
|
|
1863 |
|
|
static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream,
|
1864 |
|
|
unsigned int hwoff,
|
1865 |
|
|
unsigned long data, unsigned int off,
|
1866 |
|
|
snd_pcm_uframes_t frames)
|
1867 |
|
|
{
|
1868 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1869 |
|
|
int err;
|
1870 |
|
|
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
|
1871 |
|
|
if (substream->ops->copy) {
|
1872 |
|
|
if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0)
|
1873 |
|
|
return err;
|
1874 |
|
|
} else {
|
1875 |
|
|
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
|
1876 |
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
1877 |
|
|
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
|
1878 |
|
|
return -EFAULT;
|
1879 |
|
|
}
|
1880 |
|
|
return 0;
|
1881 |
|
|
}
|
1882 |
|
|
|
1883 |
|
|
static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
|
1884 |
|
|
unsigned long data,
|
1885 |
|
|
snd_pcm_uframes_t size,
|
1886 |
|
|
int nonblock,
|
1887 |
|
|
transfer_f transfer)
|
1888 |
|
|
{
|
1889 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
1890 |
|
|
snd_pcm_uframes_t xfer = 0;
|
1891 |
|
|
snd_pcm_uframes_t offset = 0;
|
1892 |
|
|
int err = 0;
|
1893 |
|
|
|
1894 |
|
|
if (size == 0)
|
1895 |
|
|
return 0;
|
1896 |
|
|
if (size > runtime->xfer_align)
|
1897 |
|
|
size -= size % runtime->xfer_align;
|
1898 |
|
|
|
1899 |
|
|
snd_pcm_stream_lock_irq(substream);
|
1900 |
|
|
switch (runtime->status->state) {
|
1901 |
|
|
case SNDRV_PCM_STATE_PREPARED:
|
1902 |
|
|
if (size >= runtime->start_threshold) {
|
1903 |
|
|
err = snd_pcm_start(substream);
|
1904 |
|
|
if (err < 0)
|
1905 |
|
|
goto _end_unlock;
|
1906 |
|
|
}
|
1907 |
|
|
break;
|
1908 |
|
|
case SNDRV_PCM_STATE_DRAINING:
|
1909 |
|
|
case SNDRV_PCM_STATE_RUNNING:
|
1910 |
|
|
case SNDRV_PCM_STATE_PAUSED:
|
1911 |
|
|
break;
|
1912 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
1913 |
|
|
err = -EPIPE;
|
1914 |
|
|
goto _end_unlock;
|
1915 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
1916 |
|
|
err = -ESTRPIPE;
|
1917 |
|
|
goto _end_unlock;
|
1918 |
|
|
default:
|
1919 |
|
|
err = -EBADFD;
|
1920 |
|
|
goto _end_unlock;
|
1921 |
|
|
}
|
1922 |
|
|
|
1923 |
|
|
while (size > 0) {
|
1924 |
|
|
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
|
1925 |
|
|
snd_pcm_uframes_t avail;
|
1926 |
|
|
snd_pcm_uframes_t cont;
|
1927 |
|
|
if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
1928 |
|
|
snd_pcm_update_hw_ptr(substream);
|
1929 |
|
|
__draining:
|
1930 |
|
|
avail = snd_pcm_capture_avail(runtime);
|
1931 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
|
1932 |
|
|
if (avail < runtime->xfer_align) {
|
1933 |
|
|
err = -EPIPE;
|
1934 |
|
|
goto _end_unlock;
|
1935 |
|
|
}
|
1936 |
|
|
} else if ((avail < runtime->control->avail_min && size > avail) ||
|
1937 |
|
|
(size >= runtime->xfer_align && avail < runtime->xfer_align)) {
|
1938 |
|
|
wait_queue_t wait;
|
1939 |
|
|
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
|
1940 |
|
|
long tout;
|
1941 |
|
|
|
1942 |
|
|
if (nonblock) {
|
1943 |
|
|
err = -EAGAIN;
|
1944 |
|
|
goto _end_unlock;
|
1945 |
|
|
}
|
1946 |
|
|
|
1947 |
|
|
init_waitqueue_entry(&wait, current);
|
1948 |
|
|
add_wait_queue(&runtime->sleep, &wait);
|
1949 |
|
|
while (1) {
|
1950 |
|
|
if (signal_pending(current)) {
|
1951 |
|
|
state = SIGNALED;
|
1952 |
|
|
break;
|
1953 |
|
|
}
|
1954 |
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
1955 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
1956 |
|
|
tout = schedule_timeout(10 * HZ);
|
1957 |
|
|
snd_pcm_stream_lock_irq(substream);
|
1958 |
|
|
if (tout == 0) {
|
1959 |
|
|
if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
|
1960 |
|
|
runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
|
1961 |
|
|
state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
|
1962 |
|
|
break;
|
1963 |
|
|
}
|
1964 |
|
|
}
|
1965 |
|
|
switch (runtime->status->state) {
|
1966 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
1967 |
|
|
state = ERROR;
|
1968 |
|
|
goto _end_loop;
|
1969 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
1970 |
|
|
state = SUSPENDED;
|
1971 |
|
|
goto _end_loop;
|
1972 |
|
|
case SNDRV_PCM_STATE_DRAINING:
|
1973 |
|
|
goto __draining;
|
1974 |
|
|
case SNDRV_PCM_STATE_SETUP:
|
1975 |
|
|
state = DROPPED;
|
1976 |
|
|
goto _end_loop;
|
1977 |
|
|
default:
|
1978 |
|
|
break;
|
1979 |
|
|
}
|
1980 |
|
|
avail = snd_pcm_capture_avail(runtime);
|
1981 |
|
|
if (avail >= runtime->control->avail_min) {
|
1982 |
|
|
state = READY;
|
1983 |
|
|
break;
|
1984 |
|
|
}
|
1985 |
|
|
}
|
1986 |
|
|
_end_loop:
|
1987 |
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
1988 |
|
|
|
1989 |
|
|
switch (state) {
|
1990 |
|
|
case ERROR:
|
1991 |
|
|
err = -EPIPE;
|
1992 |
|
|
goto _end_unlock;
|
1993 |
|
|
case SUSPENDED:
|
1994 |
|
|
err = -ESTRPIPE;
|
1995 |
|
|
goto _end_unlock;
|
1996 |
|
|
case SIGNALED:
|
1997 |
|
|
err = -ERESTARTSYS;
|
1998 |
|
|
goto _end_unlock;
|
1999 |
|
|
case EXPIRED:
|
2000 |
|
|
snd_printd("capture read error (DMA or IRQ trouble?)\n");
|
2001 |
|
|
err = -EIO;
|
2002 |
|
|
goto _end_unlock;
|
2003 |
|
|
case DROPPED:
|
2004 |
|
|
err = -EBADFD;
|
2005 |
|
|
goto _end_unlock;
|
2006 |
|
|
default:
|
2007 |
|
|
break;
|
2008 |
|
|
}
|
2009 |
|
|
}
|
2010 |
|
|
if (avail > runtime->xfer_align)
|
2011 |
|
|
avail -= avail % runtime->xfer_align;
|
2012 |
|
|
frames = size > avail ? avail : size;
|
2013 |
|
|
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
|
2014 |
|
|
if (frames > cont)
|
2015 |
|
|
frames = cont;
|
2016 |
|
|
snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
|
2017 |
|
|
appl_ptr = runtime->control->appl_ptr;
|
2018 |
|
|
appl_ofs = appl_ptr % runtime->buffer_size;
|
2019 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
2020 |
|
|
if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0)
|
2021 |
|
|
goto _end;
|
2022 |
|
|
snd_pcm_stream_lock_irq(substream);
|
2023 |
|
|
switch (runtime->status->state) {
|
2024 |
|
|
case SNDRV_PCM_STATE_XRUN:
|
2025 |
|
|
err = -EPIPE;
|
2026 |
|
|
goto _end_unlock;
|
2027 |
|
|
case SNDRV_PCM_STATE_SUSPENDED:
|
2028 |
|
|
err = -ESTRPIPE;
|
2029 |
|
|
goto _end_unlock;
|
2030 |
|
|
default:
|
2031 |
|
|
break;
|
2032 |
|
|
}
|
2033 |
|
|
appl_ptr += frames;
|
2034 |
|
|
if (appl_ptr >= runtime->boundary)
|
2035 |
|
|
appl_ptr -= runtime->boundary;
|
2036 |
|
|
runtime->control->appl_ptr = appl_ptr;
|
2037 |
|
|
if (substream->ops->ack)
|
2038 |
|
|
substream->ops->ack(substream);
|
2039 |
|
|
|
2040 |
|
|
offset += frames;
|
2041 |
|
|
size -= frames;
|
2042 |
|
|
xfer += frames;
|
2043 |
|
|
if (runtime->sleep_min &&
|
2044 |
|
|
runtime->status->state == SNDRV_PCM_STATE_RUNNING)
|
2045 |
|
|
snd_pcm_tick_prepare(substream);
|
2046 |
|
|
}
|
2047 |
|
|
_end_unlock:
|
2048 |
|
|
snd_pcm_stream_unlock_irq(substream);
|
2049 |
|
|
_end:
|
2050 |
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
|
2051 |
|
|
}
|
2052 |
|
|
|
2053 |
|
|
snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size)
|
2054 |
|
|
{
|
2055 |
|
|
struct snd_pcm_runtime *runtime;
|
2056 |
|
|
int nonblock;
|
2057 |
|
|
|
2058 |
|
|
snd_assert(substream != NULL, return -ENXIO);
|
2059 |
|
|
runtime = substream->runtime;
|
2060 |
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
2061 |
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
2062 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
2063 |
|
|
return -EBADFD;
|
2064 |
|
|
|
2065 |
|
|
nonblock = !!(substream->f_flags & O_NONBLOCK);
|
2066 |
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
|
2067 |
|
|
return -EINVAL;
|
2068 |
|
|
return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer);
|
2069 |
|
|
}
|
2070 |
|
|
|
2071 |
|
|
EXPORT_SYMBOL(snd_pcm_lib_read);
|
2072 |
|
|
|
2073 |
|
|
static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
|
2074 |
|
|
unsigned int hwoff,
|
2075 |
|
|
unsigned long data, unsigned int off,
|
2076 |
|
|
snd_pcm_uframes_t frames)
|
2077 |
|
|
{
|
2078 |
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
2079 |
|
|
int err;
|
2080 |
|
|
void __user **bufs = (void __user **)data;
|
2081 |
|
|
int channels = runtime->channels;
|
2082 |
|
|
int c;
|
2083 |
|
|
if (substream->ops->copy) {
|
2084 |
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
2085 |
|
|
char __user *buf;
|
2086 |
|
|
if (*bufs == NULL)
|
2087 |
|
|
continue;
|
2088 |
|
|
buf = *bufs + samples_to_bytes(runtime, off);
|
2089 |
|
|
if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0)
|
2090 |
|
|
return err;
|
2091 |
|
|
}
|
2092 |
|
|
} else {
|
2093 |
|
|
snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
|
2094 |
|
|
snd_assert(runtime->dma_area, return -EFAULT);
|
2095 |
|
|
for (c = 0; c < channels; ++c, ++bufs) {
|
2096 |
|
|
char *hwbuf;
|
2097 |
|
|
char __user *buf;
|
2098 |
|
|
if (*bufs == NULL)
|
2099 |
|
|
continue;
|
2100 |
|
|
|
2101 |
|
|
hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
|
2102 |
|
|
buf = *bufs + samples_to_bytes(runtime, off);
|
2103 |
|
|
if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames)))
|
2104 |
|
|
return -EFAULT;
|
2105 |
|
|
}
|
2106 |
|
|
}
|
2107 |
|
|
return 0;
|
2108 |
|
|
}
|
2109 |
|
|
|
2110 |
|
|
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
|
2111 |
|
|
void __user **bufs,
|
2112 |
|
|
snd_pcm_uframes_t frames)
|
2113 |
|
|
{
|
2114 |
|
|
struct snd_pcm_runtime *runtime;
|
2115 |
|
|
int nonblock;
|
2116 |
|
|
|
2117 |
|
|
snd_assert(substream != NULL, return -ENXIO);
|
2118 |
|
|
runtime = substream->runtime;
|
2119 |
|
|
snd_assert(runtime != NULL, return -ENXIO);
|
2120 |
|
|
snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
|
2121 |
|
|
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
|
2122 |
|
|
return -EBADFD;
|
2123 |
|
|
|
2124 |
|
|
nonblock = !!(substream->f_flags & O_NONBLOCK);
|
2125 |
|
|
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
2126 |
|
|
return -EINVAL;
|
2127 |
|
|
return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer);
|
2128 |
|
|
}
|
2129 |
|
|
|
2130 |
|
|
EXPORT_SYMBOL(snd_pcm_lib_readv);
|