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Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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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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* AHX audio parser
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*
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* Splits packets into individual blocks.
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*/
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#include "libavutil/intreadwrite.h"
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#include "parser.h"
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#include "parser_internal.h"
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typedef struct AHXParseContext {
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ParseContext pc;
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uint32_t header;
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int size;
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} AHXParseContext;
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static int ahx_parse(AVCodecParserContext *s1,
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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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AHXParseContext *s = s1->priv_data;
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ParseContext *pc = &s->pc;
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uint32_t state = pc->state;
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int next = END_NOT_FOUND;
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for (int i = 0; i < buf_size; i++) {
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state = (state << 8) | buf[i];
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s->size++;
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if (s->size == 4 && !s->header)
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s->header = state;
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if (s->size > 4 && state == s->header) {
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next = i - 3;
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s->size = 0;
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break;
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}
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}
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pc->state = state;
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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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s1->duration = 1152;
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s1->key_frame = 1;
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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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const FFCodecParser ff_ahx_parser = {
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PARSER_CODEC_LIST(AV_CODEC_ID_AHX),
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.priv_data_size = sizeof(AHXParseContext),
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.parse = ahx_parse,
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.close = ff_parse_close,
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};
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