aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* frame CRC encoder (for codec/format testing)
* Copyright (c) 2002 Fabrice Bellard
*
* 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
*/
#include <inttypes.h>
#include "libavutil/adler32.h"
#include "libavutil/avstring.h"
#include "avformat.h"
#include "internal.h"
static int framecrc_write_header(struct AVFormatContext *s)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
AVCodecParameters *par = st->codecpar;
if (par->extradata) {
uint32_t crc = av_adler32_update(0, par->extradata, par->extradata_size);
avio_printf(s->pb, "#extradata %d: %8d, 0x%08"PRIx32"\n",
i, par->extradata_size, crc);
}
}
return ff_framehash_write_header(s);
}
static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
char buf[256];
snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08"PRIx32,
pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
if (pkt->flags != AV_PKT_FLAG_KEY)
av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
if (pkt->side_data_elems) {
int i, j;
av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
for (i=0; i<pkt->side_data_elems; i++) {
uint32_t side_data_crc = 0;
if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) {
for (j=0; j<pkt->side_data[i].size; j++) {
side_data_crc = av_adler32_update(side_data_crc,
pkt->side_data[i].data + (j^3),
1);
}
} else {
side_data_crc = av_adler32_update(0,
pkt->side_data[i].data,
pkt->side_data[i].size);
}
av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08"PRIx32, pkt->side_data[i].size, side_data_crc);
}
}
av_strlcatf(buf, sizeof(buf), "\n");
avio_write(s->pb, buf, strlen(buf));
return 0;
}
AVOutputFormat ff_framecrc_muxer = {
.name = "framecrc",
.long_name = NULL_IF_CONFIG_SMALL("framecrc testing"),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = framecrc_write_header,
.write_packet = framecrc_write_packet,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
};
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