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 {
28 ParseContext pc;
29 } G723_1ParseContext;
30
g723_1_parse(AVCodecParserContext * s1,AVCodecContext * avctx,const uint8_t ** poutbuf,int * poutbuf_size,const uint8_t * buf,int buf_size)31 static int g723_1_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
32 const uint8_t **poutbuf, int *poutbuf_size,
33 const uint8_t *buf, int buf_size)
34 {
35 G723_1ParseContext *s = s1->priv_data;
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->ch_layout.nb_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
55 const AVCodecParser ff_g723_1_parser = {
56 .codec_ids = { AV_CODEC_ID_G723_1 },
57 .priv_data_size = sizeof(G723_1ParseContext),
58 .parser_parse = g723_1_parse,
59 .parser_close = ff_parse_close,
60 };
61