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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* AHX audio parser
*
* Splits packets into individual blocks.
*/
#include "libavutil/intreadwrite.h"
#include "parser.h"
#include "parser_internal.h"
typedef struct AHXParseContext {
ParseContext pc;
uint32_t header;
int size;
} AHXParseContext;
static int ahx_parse(AVCodecParserContext *s1,
AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
AHXParseContext *s = s1->priv_data;
ParseContext *pc = &s->pc;
uint32_t state = pc->state;
int next = END_NOT_FOUND;
for (int i = 0; i < buf_size; i++) {
state = (state << 8) | buf[i];
s->size++;
if (s->size == 4 && !s->header)
s->header = state;
if (s->size > 4 && state == s->header) {
next = i - 3;
s->size = 0;
break;
}
}
pc->state = state;
if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
s1->duration = 1152;
s1->key_frame = 1;
*poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}
const FFCodecParser ff_ahx_parser = {
PARSER_CODEC_LIST(AV_CODEC_ID_AHX),
.priv_data_size = sizeof(AHXParseContext),
.parse = ahx_parse,
.close = ff_parse_close,
};
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