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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 "config.h"
#include "libavutil/adler32.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavcodec/avcodec.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 av_unused void inline bswap(char *buf, int offset, int size)
{
if (size == 8) {
uint64_t val = AV_RN64(buf + offset);
AV_WN64(buf + offset, av_bswap64(val));
} else if (size == 4) {
uint32_t val = AV_RN32(buf + offset);
AV_WN32(buf + offset, av_bswap32(val));
}
}
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;
av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
for (i=0; i<pkt->side_data_elems; i++) {
const AVPacketSideData *const sd = &pkt->side_data[i];
const uint8_t *data = sd->data;
uint32_t side_data_crc = 0;
switch (sd->type) {
#if HAVE_BIGENDIAN
uint8_t bswap_buf[FFMAX(sizeof(AVCPBProperties),
sizeof(AVProducerReferenceTime))];
case AV_PKT_DATA_PALETTE:
case AV_PKT_DATA_REPLAYGAIN:
case AV_PKT_DATA_DISPLAYMATRIX:
case AV_PKT_DATA_STEREO3D:
case AV_PKT_DATA_AUDIO_SERVICE_TYPE:
case AV_PKT_DATA_FALLBACK_TRACK:
case AV_PKT_DATA_MASTERING_DISPLAY_METADATA:
case AV_PKT_DATA_SPHERICAL:
case AV_PKT_DATA_CONTENT_LIGHT_LEVEL:
case AV_PKT_DATA_S12M_TIMECODE:
for (size_t j = 0; j < sd->size / 4; j++) {
uint8_t buf[4];
AV_WL32(buf, AV_RB32(sd->data + 4 * j));
side_data_crc = av_adler32_update(side_data_crc, buf, 4);
}
break;
case AV_PKT_DATA_CPB_PROPERTIES:
#define BSWAP(struct, field) bswap(bswap_buf, offsetof(struct, field), sizeof(((struct){0}).field))
if (sd->size == sizeof(AVCPBProperties)) {
memcpy(bswap_buf, sd->data, sizeof(AVCPBProperties));
data = bswap_buf;
BSWAP(AVCPBProperties, max_bitrate);
BSWAP(AVCPBProperties, min_bitrate);
BSWAP(AVCPBProperties, avg_bitrate);
BSWAP(AVCPBProperties, buffer_size);
BSWAP(AVCPBProperties, vbv_delay);
}
goto pod;
case AV_PKT_DATA_PRFT:
if (sd->size == sizeof(AVProducerReferenceTime)) {
memcpy(bswap_buf, sd->data, sizeof(AVProducerReferenceTime));
data = bswap_buf;
BSWAP(AVProducerReferenceTime, wallclock);
BSWAP(AVProducerReferenceTime, flags);
}
goto pod;
pod:
#endif
default:
side_data_crc = av_adler32_update(0, data, sd->size);
}
av_strlcatf(buf, sizeof(buf), ", %8"SIZE_SPECIFIER", 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;
}
const 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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