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