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/*
* Hash/MD5 encoder (for codec/format testing)
* Copyright (c) 2009 Reimar Döffinger, based on crcenc (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 "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/hash.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
struct HashContext {
const AVClass *avclass;
struct AVHashContext *hash;
char *hash_name;
int format_version;
};
#define OFFSET(x) offsetof(struct HashContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
#if CONFIG_HASH_MUXER || CONFIG_FRAMEHASH_MUXER
static const AVOption hash_options[] = {
{ "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "sha256"}, 0, 0, ENC },
{ "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC },
{ NULL },
};
#endif
#if CONFIG_MD5_MUXER || CONFIG_FRAMEMD5_MUXER
static const AVOption md5_options[] = {
{ "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "md5"}, 0, 0, ENC },
{ "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC },
{ NULL },
};
#endif
#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER
static int hash_write_header(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
int res = av_hash_alloc(&c->hash, c->hash_name);
if (res < 0)
return res;
av_hash_init(c->hash);
return 0;
}
static int hash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct HashContext *c = s->priv_data;
av_hash_update(c->hash, pkt->data, pkt->size);
return 0;
}
static int hash_write_trailer(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
char buf[AV_HASH_MAX_SIZE*2+128];
snprintf(buf, sizeof(buf) - 200, "%s=", av_hash_get_name(c->hash));
av_hash_final_hex(c->hash, buf + strlen(buf), sizeof(buf) - strlen(buf));
av_strlcatf(buf, sizeof(buf), "\n");
avio_write(s->pb, buf, strlen(buf));
avio_flush(s->pb);
av_hash_freep(&c->hash);
return 0;
}
#endif
#if CONFIG_HASH_MUXER
static const AVClass hashenc_class = {
.class_name = "hash encoder class",
.item_name = av_default_item_name,
.option = hash_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_hash_muxer = {
.name = "hash",
.long_name = NULL_IF_CONFIG_SMALL("Hash testing"),
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = hash_write_header,
.write_packet = hash_write_packet,
.write_trailer = hash_write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &hashenc_class,
};
#endif
#if CONFIG_MD5_MUXER
static const AVClass md5enc_class = {
.class_name = "MD5 encoder class",
.item_name = av_default_item_name,
.option = md5_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_md5_muxer = {
.name = "md5",
.long_name = NULL_IF_CONFIG_SMALL("MD5 testing"),
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = hash_write_header,
.write_packet = hash_write_packet,
.write_trailer = hash_write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &md5enc_class,
};
#endif
#if CONFIG_FRAMEHASH_MUXER || CONFIG_FRAMEMD5_MUXER
static void framehash_print_extradata(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) {
struct HashContext *c = s->priv_data;
char buf[AV_HASH_MAX_SIZE*2+1];
avio_printf(s->pb, "#extradata %d, %31d, ", i, par->extradata_size);
av_hash_init(c->hash);
av_hash_update(c->hash, par->extradata, par->extradata_size);
av_hash_final_hex(c->hash, buf, sizeof(buf));
avio_write(s->pb, buf, strlen(buf));
avio_printf(s->pb, "\n");
}
}
}
static int framehash_write_header(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
int res = av_hash_alloc(&c->hash, c->hash_name);
if (res < 0)
return res;
avio_printf(s->pb, "#format: frame checksums\n");
avio_printf(s->pb, "#version: %d\n", c->format_version);
avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hash));
framehash_print_extradata(s);
ff_framehash_write_header(s);
avio_printf(s->pb, "#stream#, dts, pts, duration, size, hash\n");
return 0;
}
static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct HashContext *c = s->priv_data;
char buf[AV_HASH_MAX_SIZE*2+128];
int len;
av_hash_init(c->hash);
av_hash_update(c->hash, pkt->data, pkt->size);
snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, ",
pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
len = strlen(buf);
av_hash_final_hex(c->hash, buf + len, sizeof(buf) - len);
avio_write(s->pb, buf, strlen(buf));
if (c->format_version > 1 && pkt->side_data_elems) {
int i, j;
avio_printf(s->pb, ", S=%d", pkt->side_data_elems);
for (i = 0; i < pkt->side_data_elems; i++) {
av_hash_init(c->hash);
if (HAVE_BIGENDIAN && pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
for (j = 0; j < pkt->side_data[i].size; j += sizeof(uint32_t)) {
uint32_t data = AV_RL32(pkt->side_data[i].data + j);
av_hash_update(c->hash, (uint8_t *)&data, sizeof(uint32_t));
}
} else
av_hash_update(c->hash, pkt->side_data[i].data, pkt->side_data[i].size);
snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), ", %8d, ", pkt->side_data[i].size);
len = strlen(buf);
av_hash_final_hex(c->hash, buf + len, sizeof(buf) - len);
avio_write(s->pb, buf, strlen(buf));
}
}
avio_printf(s->pb, "\n");
avio_flush(s->pb);
return 0;
}
static int framehash_write_trailer(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
av_hash_freep(&c->hash);
return 0;
}
#endif
#if CONFIG_FRAMEHASH_MUXER
static const AVClass framehash_class = {
.class_name = "frame hash encoder class",
.item_name = av_default_item_name,
.option = hash_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_framehash_muxer = {
.name = "framehash",
.long_name = NULL_IF_CONFIG_SMALL("Per-frame hash testing"),
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = framehash_write_header,
.write_packet = framehash_write_packet,
.write_trailer = framehash_write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framehash_class,
};
#endif
#if CONFIG_FRAMEMD5_MUXER
static const AVClass framemd5_class = {
.class_name = "frame hash encoder class",
.item_name = av_default_item_name,
.option = md5_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_framemd5_muxer = {
.name = "framemd5",
.long_name = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = framehash_write_header,
.write_packet = framehash_write_packet,
.write_trailer = framehash_write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framemd5_class,
};
#endif
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