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jeremybenn |
/*gst_native_data_line.c - Implements the native methods of GstNativeDataLine
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Copyright (C) 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath 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, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include <jni.h>
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#include <gst/gst.h>
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#include "jcl.h"
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#include "gnu_javax_sound_sampled_gstreamer_lines_GstNativeDataLine.h"
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#include "gst_peer.h"
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#include "gst_classpath_src.h"
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#include "gst_native_pipeline.h"
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static jfieldID pointerDataFID = NULL;
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/* ************************************************************************** */
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static GstElement *setup_pipeline (GstNativePipeline *jpipeline, int fd);
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static void
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gst_newpad (GstElement *decodebin, GstPad *pad, gboolean last, gpointer data);
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/* ************************************************************************** */
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JNIEXPORT void JNICALL
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Java_gnu_javax_sound_sampled_gstreamer_lines_GstNativeDataLine_init_1id_1cache
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(JNIEnv *env __attribute__ ((unused)), jclass clazz __attribute__ ((unused)))
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{
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jclass pointerClass = NULL;
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#if SIZEOF_VOID_P == 8
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pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer64");
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if (pointerClass != NULL)
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{
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pointerDataFID = (*env)->GetFieldID (env, pointerClass, "data", "J");
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}
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#else
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# if SIZEOF_VOID_P == 4
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pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer32");
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if (pointerClass != NULL)
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{
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pointerDataFID = (*env)->GetFieldID(env, pointerClass, "data", "I");
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}
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# else
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# error "Pointer size is not supported."
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# endif /* SIZEOF_VOID_P == 4 */
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#endif /* SIZEOF_VOID_P == 8 */
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}
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JNIEXPORT jboolean JNICALL
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Java_gnu_javax_sound_sampled_gstreamer_lines_GstNativeDataLine_setup_1sink_1pipeline
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(JNIEnv *env, jclass clazz __attribute__ ((unused)),
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jobject pointer)
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{
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GstNativePipeline *jpipeline = NULL;
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GstElement *pipeline = NULL;
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GstElement *sink = NULL;
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GstElement *audioconv= NULL;
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GstElement *resample = NULL;
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GstElement *audio = NULL;
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GstElement *decodebin = NULL;
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GstPad *audiopad = NULL;
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gst_init (NULL, NULL);
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/* get the pipeline from the pointer, then create it if needed */
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jpipeline = (GstNativePipeline *) get_object_from_pointer (env, pointer,
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pointerDataFID);
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if (jpipeline == NULL)
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return JNI_FALSE;
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pipeline = setup_pipeline (jpipeline,
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gst_native_pipeline_get_pipeline_fd (jpipeline));
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if (pipeline == NULL)
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return JNI_FALSE;
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/* add the audio sink to the pipeline */
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/* TODO: hardcoded values */
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sink = gst_element_factory_make ("autoaudiosink", "alsa-output");
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if (sink == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(sink));
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g_warning ("unable to create sink\n");
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return JNI_FALSE;
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}
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audioconv = gst_element_factory_make ("audioconvert", "aconv");
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if (audioconv == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(sink));
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gst_object_unref(GST_OBJECT(decodebin));
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g_warning ("unable to create audioconv\n");
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return JNI_FALSE;
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}
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audio = gst_bin_new ("audiobin");
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if (audio == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(sink));
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gst_object_unref(GST_OBJECT(decodebin));
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g_warning ("unable to create audioconv\n");
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return JNI_FALSE;
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}
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resample = gst_element_factory_make ("audioresample", "audioresample");
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if (audioconv == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(sink));
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gst_object_unref(GST_OBJECT(decodebin));
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gst_object_unref(GST_OBJECT(audio));
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g_warning ("unable to create resample\n");
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return JNI_FALSE;
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}
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audiopad = gst_element_get_pad (audioconv, "sink");
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gst_bin_add_many (GST_BIN (audio), audioconv, resample, sink, NULL);
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gst_element_link (audioconv, sink);
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gst_element_add_pad (audio, gst_ghost_pad_new ("sink", audiopad));
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gst_object_unref (audiopad);
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gst_bin_add (GST_BIN (pipeline), audio);
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decodebin = gst_bin_get_by_name (GST_BIN (pipeline), "decodebin");
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g_signal_connect (decodebin, "new-decoded-pad", G_CALLBACK (gst_newpad),
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audio);
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gst_native_pipeline_set_pipeline (jpipeline, pipeline);
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return JNI_TRUE;
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}
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/* ************************************************************************** */
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static GstElement *setup_pipeline (GstNativePipeline *jpipeline, int fd)
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{
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GstElement *decodebin = NULL;
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GstElement *source = NULL;
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GstElement *pipeline = NULL;
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if (fd < 0)
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return NULL;
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pipeline = gst_pipeline_new ("java sound pipeline");
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if (pipeline == NULL)
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return NULL;
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decodebin = gst_element_factory_make ("decodebin", "decodebin");
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if (decodebin == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(source));
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g_warning ("unable to create decodebin\n");
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return NULL;
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}
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source = gst_element_factory_make ("fdsrc", "source");
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if (source == NULL)
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{
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gst_object_unref(GST_OBJECT(pipeline));
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gst_object_unref(GST_OBJECT(source));
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gst_object_unref(GST_OBJECT(decodebin));
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g_warning ("unable to create a source");
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return JNI_FALSE;
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}
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g_object_set (G_OBJECT (source), "fd", fd, NULL);
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gst_bin_add_many (GST_BIN (pipeline), source, decodebin, NULL);
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gst_element_link (source, decodebin);
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return pipeline;
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}
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static void
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gst_newpad (GstElement *decodebin, GstPad *pad, gboolean last, gpointer data)
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{
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GstCaps *caps;
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GstStructure *str;
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GstPad *audiopad;
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GstElement *audio = (GstElement *) data;
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/* only link once */
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audiopad = gst_element_get_pad (audio, "sink");
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if (GST_PAD_IS_LINKED (audiopad))
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{
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g_object_unref (audiopad);
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return;
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}
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/* check media type */
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caps = gst_pad_get_caps (pad);
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str = gst_caps_get_structure (caps, 0);
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if (!g_strrstr (gst_structure_get_name (str), "audio"))
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{
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gst_caps_unref (caps);
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gst_object_unref (audiopad);
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return;
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}
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gst_caps_unref (caps);
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/* link'n'play */
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gst_pad_link (pad, audiopad);
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}
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