ffmpeg/libavformat/hashenc.c

365 lines
12 KiB
C

/*
* 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 **hashes;
char *hash_name;
int per_stream;
int format_version;
};
#define OFFSET(x) offsetof(struct HashContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
#define HASH_OPT(defaulttype) \
{ "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = defaulttype}, 0, 0, ENC }
#define FORMAT_VERSION_OPT \
{ "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC }
#if CONFIG_HASH_MUXER || CONFIG_STREAMHASH_MUXER
static const AVOption hash_streamhash_options[] = {
HASH_OPT("sha256"),
{ NULL },
};
static const AVClass hash_streamhashenc_class = {
.class_name = "(stream) hash muxer",
.item_name = av_default_item_name,
.option = hash_streamhash_options,
.version = LIBAVUTIL_VERSION_INT,
};
#endif
#if CONFIG_FRAMEHASH_MUXER
static const AVOption framehash_options[] = {
HASH_OPT("sha256"),
FORMAT_VERSION_OPT,
{ NULL },
};
#endif
#if CONFIG_MD5_MUXER
static const AVOption md5_options[] = {
HASH_OPT("md5"),
{ NULL },
};
#endif
#if CONFIG_FRAMEMD5_MUXER
static const AVOption framemd5_options[] = {
HASH_OPT("md5"),
FORMAT_VERSION_OPT,
{ NULL },
};
#endif
#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER
static int hash_init(struct AVFormatContext *s)
{
int res;
struct HashContext *c = s->priv_data;
c->per_stream = 0;
c->hashes = av_mallocz_array(1, sizeof(*c->hashes));
if (!c->hashes)
return AVERROR(ENOMEM);
res = av_hash_alloc(&c->hashes[0], c->hash_name);
if (res < 0)
return res;
av_hash_init(c->hashes[0]);
return 0;
}
#endif
#if CONFIG_STREAMHASH_MUXER
static int streamhash_init(struct AVFormatContext *s)
{
int res, i;
struct HashContext *c = s->priv_data;
c->per_stream = 1;
c->hashes = av_mallocz_array(s->nb_streams, sizeof(*c->hashes));
if (!c->hashes)
return AVERROR(ENOMEM);
for (i = 0; i < s->nb_streams; i++) {
res = av_hash_alloc(&c->hashes[i], c->hash_name);
if (res < 0) {
return res;
}
av_hash_init(c->hashes[i]);
}
return 0;
}
#endif
#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER || CONFIG_STREAMHASH_MUXER
static char get_media_type_char(enum AVMediaType type)
{
switch (type) {
case AVMEDIA_TYPE_VIDEO: return 'v';
case AVMEDIA_TYPE_AUDIO: return 'a';
case AVMEDIA_TYPE_DATA: return 'd';
case AVMEDIA_TYPE_SUBTITLE: return 's';
case AVMEDIA_TYPE_ATTACHMENT: return 't';
default: return '?';
}
}
static int hash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct HashContext *c = s->priv_data;
av_hash_update(c->hashes[c->per_stream ? pkt->stream_index : 0], pkt->data, pkt->size);
return 0;
}
static int hash_write_trailer(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
int num_hashes = c->per_stream ? s->nb_streams : 1;
for (int i = 0; i < num_hashes; i++) {
char buf[AV_HASH_MAX_SIZE*2+128];
if (c->per_stream) {
AVStream *st = s->streams[i];
snprintf(buf, sizeof(buf) - 200, "%d,%c,%s=", i, get_media_type_char(st->codecpar->codec_type),
av_hash_get_name(c->hashes[i]));
} else {
snprintf(buf, sizeof(buf) - 200, "%s=", av_hash_get_name(c->hashes[i]));
}
av_hash_final_hex(c->hashes[i], buf + strlen(buf), sizeof(buf) - strlen(buf));
av_strlcatf(buf, sizeof(buf), "\n");
avio_write(s->pb, buf, strlen(buf));
}
return 0;
}
#endif
static void hash_free(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
if (c->hashes) {
int num_hashes = c->per_stream ? s->nb_streams : 1;
for (int i = 0; i < num_hashes; i++) {
av_hash_freep(&c->hashes[i]);
}
}
av_freep(&c->hashes);
}
#if CONFIG_HASH_MUXER
const 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,
.init = hash_init,
.write_packet = hash_write_packet,
.write_trailer = hash_write_trailer,
.deinit = hash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &hash_streamhashenc_class,
};
#endif
#if CONFIG_MD5_MUXER
static const AVClass md5enc_class = {
.class_name = "MD5 muxer",
.item_name = av_default_item_name,
.option = md5_options,
.version = LIBAVUTIL_VERSION_INT,
};
const 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,
.init = hash_init,
.write_packet = hash_write_packet,
.write_trailer = hash_write_trailer,
.deinit = hash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &md5enc_class,
};
#endif
#if CONFIG_STREAMHASH_MUXER
const AVOutputFormat ff_streamhash_muxer = {
.name = "streamhash",
.long_name = NULL_IF_CONFIG_SMALL("Per-stream hash testing"),
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.init = streamhash_init,
.write_packet = hash_write_packet,
.write_trailer = hash_write_trailer,
.deinit = hash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &hash_streamhashenc_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->hashes[0]);
av_hash_update(c->hashes[0], par->extradata, par->extradata_size);
av_hash_final_hex(c->hashes[0], buf, sizeof(buf));
avio_write(s->pb, buf, strlen(buf));
avio_printf(s->pb, "\n");
}
}
}
static int framehash_init(struct AVFormatContext *s)
{
int res;
struct HashContext *c = s->priv_data;
c->per_stream = 0;
c->hashes = av_mallocz_array(1, sizeof(*c->hashes));
if (!c->hashes)
return AVERROR(ENOMEM);
res = av_hash_alloc(&c->hashes[0], c->hash_name);
if (res < 0)
return res;
return 0;
}
static int framehash_write_header(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
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->hashes[0]));
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->hashes[0]);
av_hash_update(c->hashes[0], 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->hashes[0], buf + len, sizeof(buf) - len);
avio_write(s->pb, buf, strlen(buf));
if (c->format_version > 1 && pkt->side_data_elems) {
int i;
avio_printf(s->pb, ", S=%d", pkt->side_data_elems);
for (i = 0; i < pkt->side_data_elems; i++) {
av_hash_init(c->hashes[0]);
if (HAVE_BIGENDIAN && pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
for (size_t 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->hashes[0], (uint8_t *)&data, sizeof(uint32_t));
}
} else
av_hash_update(c->hashes[0], pkt->side_data[i].data, pkt->side_data[i].size);
snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1),
", %8"SIZE_SPECIFIER", ", pkt->side_data[i].size);
len = strlen(buf);
av_hash_final_hex(c->hashes[0], buf + len, sizeof(buf) - len);
avio_write(s->pb, buf, strlen(buf));
}
}
avio_printf(s->pb, "\n");
return 0;
}
#endif
#if CONFIG_FRAMEHASH_MUXER
static const AVClass framehash_class = {
.class_name = "frame hash muxer",
.item_name = av_default_item_name,
.option = framehash_options,
.version = LIBAVUTIL_VERSION_INT,
};
const 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,
.init = framehash_init,
.write_header = framehash_write_header,
.write_packet = framehash_write_packet,
.deinit = hash_free,
.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 MD5 muxer",
.item_name = av_default_item_name,
.option = framemd5_options,
.version = LIBAVUTIL_VERSION_INT,
};
const 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,
.init = framehash_init,
.write_header = framehash_write_header,
.write_packet = framehash_write_packet,
.deinit = hash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framemd5_class,
};
#endif