63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
|
|
* 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
|
|
* XMA2 audio parser
|
|
*/
|
|
|
|
#include "parser.h"
|
|
|
|
typedef struct XMAParserContext{
|
|
int skip_packets;
|
|
} XMAParserContext;
|
|
|
|
static int xma_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
XMAParserContext *s = s1->priv_data;
|
|
|
|
if (buf_size % 2048 == 0) {
|
|
int duration = 0, packet, nb_packets = buf_size / 2048;
|
|
|
|
for (packet = 0; packet < nb_packets; packet++) {
|
|
if (s->skip_packets == 0) {
|
|
duration += buf[packet * 2048] * 128;
|
|
s->skip_packets = buf[packet * 2048 + 3] + 1;
|
|
}
|
|
s->skip_packets--;
|
|
}
|
|
|
|
s1->duration = duration;
|
|
s1->key_frame = !!duration;
|
|
}
|
|
|
|
/* always return the full packet. this parser isn't doing any splitting or
|
|
combining, only packet analysis */
|
|
*poutbuf = buf;
|
|
*poutbuf_size = buf_size;
|
|
return buf_size;
|
|
}
|
|
|
|
AVCodecParser ff_xma_parser = {
|
|
.codec_ids = { AV_CODEC_ID_XMA2 },
|
|
.priv_data_size = sizeof(XMAParserContext),
|
|
.parser_parse = xma_parse,
|
|
};
|