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[/] [funbase_ip_library/] [trunk/] [TUT/] [ip.application/] [h.263_encoder_main/] [1.0/] [src/] [yuv.c] - Blame information for rev 145

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/*---------------------------------------------------------------------------
*
*  Course:   System Design II
*
*  Module:   yuv.c
*
*  Purpose:  YUV raw-file handling functions  for H.263 encoder
*
*  Notes:
*
*  Author:   Tero Kangas and Olli Lehtoranta
*
*  History:  31/10/2002: + Original version ready
*
**---------------------------------------------------------------------------
*/
#include "headers.h"
 
 
 
/*---------------------------------------------------------------------------
*
*  Function: yuvOpenInputFile
*
*  Input:    file_name = name of file to be opened
*            frame_count = frame counter (to be initialized)
*
*  Return:   Pointer to file opened
*
*  Purpose:  To open a raw YUV file and compute its frame count
*
**---------------------------------------------------------------------------
*/
FILE* yuvOpenInputFile( const vchar *file_name, sint32 *frame_count) {
 
  FILE *file;
  vlong  file_size;
 
  file = fopen(file_name,"rb");
  if( file == NULL ){
    printf("yuvOpenInputFile: Could not open the file %s\n", file_name);
    return NULL;
  }
 
  /* Check the file size */
  fseek(file,0,SEEK_END);
  file_size = ftell(file);
  *frame_count = ( file_size / 38016 );
 
  /* Set the file position back to the beginning of the file */
  fseek(file,0,SEEK_SET);
  return file;
}
 
 
/*---------------------------------------------------------------------------
*
*  Function: yuvReadFrame
*
*  Input:    file = data structure modeling YUV-file
*            target_buffer = target memory buffer where to the image is read
*
*  Return:   V_TRUE, if a frame read operation does not fail
*
*  Purpose:  Can be used to read frames from raw YUV-file
*
**---------------------------------------------------------------------------
*/
vbool yuvReadFrame( FILE * const file,
                    uint8 * const target_buffer ){
 
  if( fread(target_buffer,38016,1,file) != 1 ){
    printf("yuvReadFrame: The read was failed!\n");
    return V_FALSE;
  }
 
  return V_TRUE;
}
 
/*---------------------------------------------------------------------------
*
*  Function: yuvWriteFrame
*
*  Input:    file = data structure modeling YUV-file
*            source_buffer = source memory buffer from where image data
*                            is stored to file
*
*  Return:   V_FALSE, if the write operation fails
*
*  Purpose:  To write singe YUV-frame to the disk. Concatenated after
*            existing file.
*
**---------------------------------------------------------------------------
*/
vbool yuvWriteFrame( FILE * const file, const uint8 * const source_buffer ) {
 
  if( file != NULL ){
    if( fwrite(source_buffer,38016,1,file) != 1 ){
      return V_FALSE;
    }
  }
  return V_TRUE;
}
 
 

Line No.	Rev	Author	Line
1	145	lanttu	`/*---------------------------------------------------------------------------`
2			`*`
3			`* Course: System Design II`
4			`*`
5			`* Module: yuv.c`
6			`*`
7			`* Purpose: YUV raw-file handling functions for H.263 encoder`
8			`*`
9			`* Notes:`
10			`*`
11			`* Author: Tero Kangas and Olli Lehtoranta`
12			`*`
13			`* History: 31/10/2002: + Original version ready`
14			`*`
15			`**---------------------------------------------------------------------------`
16			`*/`
17			`#include "headers.h"`
18
19
20
21			`/*---------------------------------------------------------------------------`
22			`*`
23			`* Function: yuvOpenInputFile`
24			`*`
25			`* Input: file_name = name of file to be opened`
26			`* frame_count = frame counter (to be initialized)`
27			`*`
28			`* Return: Pointer to file opened`
29			`*`
30			`* Purpose: To open a raw YUV file and compute its frame count`
31			`*`
32			`**---------------------------------------------------------------------------`
33			`*/`
34			`FILE* yuvOpenInputFile( const vchar file_name, sint32 frame_count) {`
35
36			`FILE *file;`
37			`vlong file_size;`
38
39			`file = fopen(file_name,"rb");`
40			`if( file == NULL ){`
41			`printf("yuvOpenInputFile: Could not open the file %s\n", file_name);`
42			`return NULL;`
43			`}`
44
45			`/* Check the file size */`
46			`fseek(file,0,SEEK_END);`
47			`file_size = ftell(file);`
48			`*frame_count = ( file_size / 38016 );`
49
50			`/* Set the file position back to the beginning of the file */`
51			`fseek(file,0,SEEK_SET);`
52			`return file;`
53			`}`
54
55
56			`/*---------------------------------------------------------------------------`
57			`*`
58			`* Function: yuvReadFrame`
59			`*`
60			`* Input: file = data structure modeling YUV-file`
61			`* target_buffer = target memory buffer where to the image is read`
62			`*`
63			`* Return: V_TRUE, if a frame read operation does not fail`
64			`*`
65			`* Purpose: Can be used to read frames from raw YUV-file`
66			`*`
67			`**---------------------------------------------------------------------------`
68			`*/`
69			`vbool yuvReadFrame( FILE * const file,`
70			`uint8 * const target_buffer ){`
71
72			`if( fread(target_buffer,38016,1,file) != 1 ){`
73			`printf("yuvReadFrame: The read was failed!\n");`
74			`return V_FALSE;`
75			`}`
76
77			`return V_TRUE;`
78			`}`
79
80			`/*---------------------------------------------------------------------------`
81			`*`
82			`* Function: yuvWriteFrame`
83			`*`
84			`* Input: file = data structure modeling YUV-file`
85			`* source_buffer = source memory buffer from where image data`
86			`* is stored to file`
87			`*`
88			`* Return: V_FALSE, if the write operation fails`
89			`*`
90			`* Purpose: To write singe YUV-frame to the disk. Concatenated after`
91			`* existing file.`
92			`*`
93			`**---------------------------------------------------------------------------`
94			`*/`
95			`vbool yuvWriteFrame( FILE * const file, const uint8 * const source_buffer ) {`
96
97			`if( file != NULL ){`
98			`if( fwrite(source_buffer,38016,1,file) != 1 ){`
99			`return V_FALSE;`
100			`}`
101			`}`
102			`return V_TRUE;`
103			`}`
104
105

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[/] [funbase_ip_library/] [trunk/] [TUT/] [ip.application/] [h.263_encoder_main/] [1.0/] [src/] [yuv.c] - Blame information for rev 145