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-rw-r--r--libavformat/hashenc.c262
1 files changed, 262 insertions, 0 deletions
diff --git a/libavformat/hashenc.c b/libavformat/hashenc.c
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--- /dev/null
+++ b/libavformat/hashenc.c
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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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