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/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but 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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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Sipr audio parser |
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*/ |
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#include "parser.h" |
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typedef struct SiprParserContext{ |
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ParseContext pc; |
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} SiprParserContext; |
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static int sipr_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size) |
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{ |
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int next; |
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✓✗ |
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switch (avctx->block_align) { |
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case 20: |
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case 19: |
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case 29: |
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case 37: next = avctx->block_align; break; |
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default: |
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if (avctx->bit_rate > 12200) next = 20; |
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else if (avctx->bit_rate > 7500 ) next = 19; |
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else if (avctx->bit_rate > 5750 ) next = 29; |
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else next = 37; |
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} |
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return FFMIN(next, buf_size); |
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} |
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static int sipr_parse(AVCodecParserContext *s1, AVCodecContext *avctx, |
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const uint8_t **poutbuf, int *poutbuf_size, |
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const uint8_t *buf, int buf_size) |
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{ |
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SiprParserContext *s = s1->priv_data; |
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ParseContext *pc = &s->pc; |
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int next; |
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next = sipr_split(avctx, buf, buf_size); |
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✗✓ |
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if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) { |
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*poutbuf = NULL; |
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*poutbuf_size = 0; |
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return buf_size; |
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} |
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*poutbuf = buf; |
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*poutbuf_size = buf_size; |
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return next; |
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} |
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AVCodecParser ff_sipr_parser = { |
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.codec_ids = { AV_CODEC_ID_SIPR }, |
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.priv_data_size = sizeof(SiprParserContext), |
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.parser_parse = sipr_parse, |
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.parser_close = ff_parse_close, |
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}; |