2 * Copyright (c) 2015 Ganesh Ajjanagadde
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * Splits packets into individual blocks.
28 #include "libavutil/avassert.h"
32 typedef struct G729ParseContext {
39 static int g729_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
40 const uint8_t **poutbuf, int *poutbuf_size,
41 const uint8_t *buf, int buf_size)
43 G729ParseContext *s = s1->priv_data;
44 ParseContext *pc = &s->pc;
48 /* FIXME: replace this heuristic block_size with more precise estimate */
49 s->block_size = (avctx->bit_rate < 8000) ? G729D_6K4_BLOCK_SIZE : G729_8K_BLOCK_SIZE;
50 if (avctx->codec_id == AV_CODEC_ID_ACELP_KELVIN)
52 s->block_size *= avctx->channels;
53 s->duration = avctx->frame_size;
58 *poutbuf_size = buf_size;
63 s->remaining = s->block_size;
64 if (s->remaining <= buf_size) {
69 s->remaining -= buf_size;
72 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
78 s1->duration = s->duration;
81 *poutbuf_size = buf_size;
85 const AVCodecParser ff_g729_parser = {
86 .codec_ids = { AV_CODEC_ID_G729, AV_CODEC_ID_ACELP_KELVIN },
87 .priv_data_size = sizeof(G729ParseContext),
88 .parser_parse = g729_parse,
89 .parser_close = ff_parse_close,