avformat: add hash and framehash muxers

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 231 insertions, 0 deletions

diff --git a/libavformat/hashenc.c b/libavformat/hashenc.c
new file mode 100644
index 0000000000..ef886a04a0
--- /dev/null
+++ b/libavformat/hashenc.c
@@ -0,0 +1,231 @@
+/*
+ * 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/opt.h"
+#include "avformat.h"
+#include "internal.h"
+
+struct HashContext {
+    const AVClass *avclass;
+    struct AVHashContext *hash;
+    char *hash_name;
+    int format_version;
+};
+
+static void hash_finish(struct AVFormatContext *s, char *buf)
+{
+    struct HashContext *c = s->priv_data;
+    uint8_t hash[AV_HASH_MAX_SIZE];
+    int i, offset = strlen(buf);
+    int len = av_hash_get_size(c->hash);
+    av_assert0(len > 0 && len <= sizeof(hash));
+    av_hash_final(c->hash, hash);
+    for (i = 0; i < len; i++) {
+        snprintf(buf + offset, 3, "%02"PRIx8, hash[i]);
+        offset += 2;
+    }
+    buf[offset] = '\n';
+    buf[offset+1] = 0;
+
+    avio_write(s->pb, buf, strlen(buf));
+    avio_flush(s->pb);
+}
+
+#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 = 1}, 1, 1, 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 = 1}, 1, 1, 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[256];
+    av_strlcpy(buf, av_hash_get_name(c->hash), sizeof(buf) - 200);
+    av_strlcat(buf, "=", sizeof(buf) - 200);
+
+    hash_finish(s, buf);
+
+    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 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));
+    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[256];
+    av_hash_init(c->hash);
+    av_hash_update(c->hash, pkt->data, pkt->size);
+
+    snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, ",
+             pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
+    hash_finish(s, buf);
+    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