FFmpeg
g723_1_parser.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * G723_1 audio parser
22  */
23 
24 #include "parser.h"
25 #include "g723_1.h"
26 
27 typedef struct G723_1ParseContext {
30 
32  const uint8_t **poutbuf, int *poutbuf_size,
33  const uint8_t *buf, int buf_size)
34 {
36  ParseContext *pc = &s->pc;
37  int next = END_NOT_FOUND;
38 
39  if (buf_size > 0)
40  next = frame_size[buf[0] & 3] * FFMAX(1, avctx->channels);
41 
42  if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
43  *poutbuf = NULL;
44  *poutbuf_size = 0;
45  return buf_size;
46  }
47 
48  s1->duration = 240;
49 
50  *poutbuf = buf;
51  *poutbuf_size = buf_size;
52  return next;
53 }
54 
57  .priv_data_size = sizeof(G723_1ParseContext),
58  .parser_parse = g723_1_parse,
59  .parser_close = ff_parse_close,
60 };
#define NULL
Definition: coverity.c:32
int codec_ids[5]
Definition: avcodec.h:5276
int duration
Duration of the current frame.
Definition: avcodec.h:5230
AVCodecParser ff_g723_1_parser
Definition: g723_1_parser.c:55
uint8_t
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
Definition: parser.c:234
#define FFMAX(a, b)
Definition: common.h:94
void ff_parse_close(AVCodecParserContext *s)
Definition: parser.c:315
#define s(width, name)
Definition: cbs_vp9.c:257
int frame_size
Definition: mxfenc.c:2215
main external API structure.
Definition: avcodec.h:1565
G.723.1 types, functions and data tables.
void * buf
Definition: avisynth_c.h:766
#define s1
Definition: regdef.h:38
#define END_NOT_FOUND
Definition: parser.h:40
static int g723_1_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition: g723_1_parser.c:31
int channels
number of audio channels
Definition: avcodec.h:2226
ParseContext pc
Definition: g723_1_parser.c:28