386 lines
12 KiB
C
386 lines
12 KiB
C
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/*
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* Hash/MD5 encoder (for codec/format testing)
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* Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/hash.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "internal.h"
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struct HashContext {
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const AVClass *avclass;
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struct AVHashContext **hashes;
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char *hash_name;
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int per_stream;
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int format_version;
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};
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#define OFFSET(x) offsetof(struct HashContext, x)
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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#define HASH_OPT(defaulttype) \
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{ "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = defaulttype}, 0, 0, ENC }
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#define FORMAT_VERSION_OPT \
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{ "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC }
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#if CONFIG_HASH_MUXER
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static const AVOption hash_options[] = {
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HASH_OPT("sha256"),
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{ NULL },
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};
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#endif
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#if CONFIG_FRAMEHASH_MUXER
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static const AVOption framehash_options[] = {
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HASH_OPT("sha256"),
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FORMAT_VERSION_OPT,
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{ NULL },
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};
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#endif
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#if CONFIG_STREAMHASH_MUXER
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static const AVOption streamhash_options[] = {
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HASH_OPT("sha256"),
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{ NULL },
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};
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#endif
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#if CONFIG_MD5_MUXER
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static const AVOption md5_options[] = {
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HASH_OPT("md5"),
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{ NULL },
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};
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#endif
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#if CONFIG_FRAMEMD5_MUXER
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static const AVOption framemd5_options[] = {
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HASH_OPT("md5"),
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FORMAT_VERSION_OPT,
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{ NULL },
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};
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#endif
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#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER
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static int hash_init(struct AVFormatContext *s)
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{
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int res;
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struct HashContext *c = s->priv_data;
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c->per_stream = 0;
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c->hashes = av_mallocz_array(1, sizeof(*c->hashes));
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if (!c->hashes)
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return AVERROR(ENOMEM);
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res = av_hash_alloc(&c->hashes[0], c->hash_name);
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if (res < 0)
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return res;
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av_hash_init(c->hashes[0]);
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return 0;
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}
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#endif
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#if CONFIG_STREAMHASH_MUXER
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static int streamhash_init(struct AVFormatContext *s)
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{
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int res, i;
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struct HashContext *c = s->priv_data;
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c->per_stream = 1;
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c->hashes = av_mallocz_array(s->nb_streams, sizeof(*c->hashes));
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if (!c->hashes)
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return AVERROR(ENOMEM);
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for (i = 0; i < s->nb_streams; i++) {
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res = av_hash_alloc(&c->hashes[i], c->hash_name);
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if (res < 0) {
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return res;
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}
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av_hash_init(c->hashes[i]);
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}
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return 0;
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}
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#endif
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#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER || CONFIG_STREAMHASH_MUXER
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static char get_media_type_char(enum AVMediaType type)
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{
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switch (type) {
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case AVMEDIA_TYPE_VIDEO: return 'v';
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case AVMEDIA_TYPE_AUDIO: return 'a';
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case AVMEDIA_TYPE_DATA: return 'd';
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case AVMEDIA_TYPE_SUBTITLE: return 's';
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case AVMEDIA_TYPE_ATTACHMENT: return 't';
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default: return '?';
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}
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}
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static int hash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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{
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struct HashContext *c = s->priv_data;
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av_hash_update(c->hashes[c->per_stream ? pkt->stream_index : 0], pkt->data, pkt->size);
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return 0;
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}
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static int hash_write_trailer(struct AVFormatContext *s)
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{
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struct HashContext *c = s->priv_data;
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int num_hashes = c->per_stream ? s->nb_streams : 1;
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for (int i = 0; i < num_hashes; i++) {
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char buf[AV_HASH_MAX_SIZE*2+128];
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if (c->per_stream) {
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AVStream *st = s->streams[i];
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snprintf(buf, sizeof(buf) - 200, "%d,%c,%s=", i, get_media_type_char(st->codecpar->codec_type),
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av_hash_get_name(c->hashes[i]));
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} else {
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snprintf(buf, sizeof(buf) - 200, "%s=", av_hash_get_name(c->hashes[i]));
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}
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av_hash_final_hex(c->hashes[i], buf + strlen(buf), sizeof(buf) - strlen(buf));
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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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}
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return 0;
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}
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static void hash_free(struct AVFormatContext *s)
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{
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struct HashContext *c = s->priv_data;
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if (c->hashes) {
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int num_hashes = c->per_stream ? s->nb_streams : 1;
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for (int i = 0; i < num_hashes; i++) {
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av_hash_freep(&c->hashes[i]);
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}
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}
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av_freep(&c->hashes);
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}
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#endif
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#if CONFIG_HASH_MUXER
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static const AVClass hashenc_class = {
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.class_name = "hash muxer",
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.item_name = av_default_item_name,
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.option = hash_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVOutputFormat ff_hash_muxer = {
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.name = "hash",
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.long_name = NULL_IF_CONFIG_SMALL("Hash testing"),
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.priv_data_size = sizeof(struct HashContext),
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.init = hash_init,
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.write_packet = hash_write_packet,
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.write_trailer = hash_write_trailer,
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.deinit = hash_free,
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.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
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AVFMT_TS_NEGATIVE,
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.priv_class = &hashenc_class,
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};
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#endif
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#if CONFIG_MD5_MUXER
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static const AVClass md5enc_class = {
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.class_name = "MD5 muxer",
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.item_name = av_default_item_name,
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.option = md5_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVOutputFormat ff_md5_muxer = {
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.name = "md5",
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.long_name = NULL_IF_CONFIG_SMALL("MD5 testing"),
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.priv_data_size = sizeof(struct HashContext),
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.init = hash_init,
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.write_packet = hash_write_packet,
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.write_trailer = hash_write_trailer,
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.deinit = hash_free,
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.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
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AVFMT_TS_NEGATIVE,
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.priv_class = &md5enc_class,
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};
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#endif
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#if CONFIG_STREAMHASH_MUXER
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static const AVClass streamhashenc_class = {
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.class_name = "stream hash muxer",
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.item_name = av_default_item_name,
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.option = streamhash_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVOutputFormat ff_streamhash_muxer = {
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.name = "streamhash",
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.long_name = NULL_IF_CONFIG_SMALL("Per-stream hash testing"),
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.priv_data_size = sizeof(struct HashContext),
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.init = streamhash_init,
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.write_packet = hash_write_packet,
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.write_trailer = hash_write_trailer,
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.deinit = hash_free,
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.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
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AVFMT_TS_NEGATIVE,
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.priv_class = &streamhashenc_class,
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};
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#endif
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#if CONFIG_FRAMEHASH_MUXER || CONFIG_FRAMEMD5_MUXER
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static void framehash_print_extradata(struct AVFormatContext *s)
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{
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int i;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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AVCodecParameters *par = st->codecpar;
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if (par->extradata) {
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struct HashContext *c = s->priv_data;
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char buf[AV_HASH_MAX_SIZE*2+1];
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avio_printf(s->pb, "#extradata %d, %31d, ", i, par->extradata_size);
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av_hash_init(c->hashes[0]);
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av_hash_update(c->hashes[0], par->extradata, par->extradata_size);
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av_hash_final_hex(c->hashes[0], buf, sizeof(buf));
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avio_write(s->pb, buf, strlen(buf));
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avio_printf(s->pb, "\n");
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}
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}
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}
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static int framehash_init(struct AVFormatContext *s)
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{
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int res;
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struct HashContext *c = s->priv_data;
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c->per_stream = 0;
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c->hashes = av_mallocz_array(1, sizeof(*c->hashes));
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if (!c->hashes)
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return AVERROR(ENOMEM);
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res = av_hash_alloc(&c->hashes[0], c->hash_name);
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if (res < 0)
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return res;
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return 0;
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}
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static int framehash_write_header(struct AVFormatContext *s)
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{
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struct HashContext *c = s->priv_data;
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avio_printf(s->pb, "#format: frame checksums\n");
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avio_printf(s->pb, "#version: %d\n", c->format_version);
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avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hashes[0]));
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framehash_print_extradata(s);
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ff_framehash_write_header(s);
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avio_printf(s->pb, "#stream#, dts, pts, duration, size, hash\n");
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return 0;
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}
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static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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{
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struct HashContext *c = s->priv_data;
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char buf[AV_HASH_MAX_SIZE*2+128];
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int len;
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av_hash_init(c->hashes[0]);
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av_hash_update(c->hashes[0], pkt->data, pkt->size);
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snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, ",
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pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
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len = strlen(buf);
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av_hash_final_hex(c->hashes[0], buf + len, sizeof(buf) - len);
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avio_write(s->pb, buf, strlen(buf));
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if (c->format_version > 1 && pkt->side_data_elems) {
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int i, j;
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avio_printf(s->pb, ", S=%d", pkt->side_data_elems);
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for (i = 0; i < pkt->side_data_elems; i++) {
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av_hash_init(c->hashes[0]);
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if (HAVE_BIGENDIAN && pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
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for (j = 0; j < pkt->side_data[i].size; j += sizeof(uint32_t)) {
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uint32_t data = AV_RL32(pkt->side_data[i].data + j);
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av_hash_update(c->hashes[0], (uint8_t *)&data, sizeof(uint32_t));
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}
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} else
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av_hash_update(c->hashes[0], pkt->side_data[i].data, pkt->side_data[i].size);
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snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), ", %8d, ", pkt->side_data[i].size);
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len = strlen(buf);
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av_hash_final_hex(c->hashes[0], buf + len, sizeof(buf) - len);
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avio_write(s->pb, buf, strlen(buf));
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}
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}
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avio_printf(s->pb, "\n");
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return 0;
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}
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static void framehash_free(struct AVFormatContext *s)
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{
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struct HashContext *c = s->priv_data;
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if (c->hashes)
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av_hash_freep(&c->hashes[0]);
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av_freep(&c->hashes);
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}
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#endif
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#if CONFIG_FRAMEHASH_MUXER
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static const AVClass framehash_class = {
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.class_name = "frame hash muxer",
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.item_name = av_default_item_name,
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.option = framehash_options,
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.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,
|
||
|
|
.init = framehash_init,
|
||
|
|
.write_header = framehash_write_header,
|
||
|
|
.write_packet = framehash_write_packet,
|
||
|
|
.deinit = framehash_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,
|
||
|
|
};
|
||
|
|
|
||
|
|
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 = framehash_free,
|
||
|
|
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
|
||
|
|
AVFMT_TS_NEGATIVE,
|
||
|
|
.priv_class = &framemd5_class,
|
||
|
|
};
|
||
|
|
#endif
|