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avformat/hashenc: use an array of hashes

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Only the first element of the array is used currently, the other
elements are in preparation for a new muxer calculating multiple
hashes.

Also move alloc/init code from the write_header() functions to
dedicated init() functions, and the cleanup code from the
write_trailer() functions to dedicated deinit() functions.

hash_free() and framehash_free() turn out to be identical here,
but will differ in the subsequent commit, so they are not consolidated.

Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Moritz Barsnick 2019-09-12 11:23:05 +02:00 committed by Michael Niedermayer
parent d214f21611
commit 666b427881
1 changed files with 55 additions and 29 deletions
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84
libavformat/hashenc.c
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@ -29,7 +29,7 @@
struct HashContext {
const AVClass *avclass;
struct AVHashContext *hash;
struct AVHashContext **hashes;
char *hash_name;
int format_version;
};
@ -72,20 +72,24 @@ static const AVOption framemd5_options[] = {
#endif
#if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER
static int hash_write_header(struct AVFormatContext *s)
static int hash_init(struct AVFormatContext *s)
{
int res;
struct HashContext *c = s->priv_data;
int res = av_hash_alloc(&c->hash, c->hash_name);
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->hash);
av_hash_init(c->hashes[0]);
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);
av_hash_update(c->hashes[0], pkt->data, pkt->size);
return 0;
}
@ -93,16 +97,23 @@ 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));
snprintf(buf, sizeof(buf) - 200, "%s=", av_hash_get_name(c->hashes[0]));
av_hash_final_hex(c->hash, buf + strlen(buf), sizeof(buf) - strlen(buf));
av_hash_final_hex(c->hashes[0], 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;
}
static void hash_free(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
if (c->hashes)
av_hash_freep(&c->hashes[0]);
av_freep(&c->hashes);
}
#endif
#if CONFIG_HASH_MUXER
@ -119,9 +130,10 @@ AVOutputFormat ff_hash_muxer = {
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = hash_write_header,
.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 = &hashenc_class,
@ -142,9 +154,10 @@ AVOutputFormat ff_md5_muxer = {
.priv_data_size = sizeof(struct HashContext),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = hash_write_header,
.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,
@ -164,24 +177,34 @@ static void framehash_print_extradata(struct AVFormatContext *s)
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));
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->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;
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));
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");
@ -193,30 +216,30 @@ 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);
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->hash, buf + len, sizeof(buf) - len);
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, 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);
av_hash_init(c->hashes[0]);
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));
av_hash_update(c->hashes[0], (uint8_t *)&data, sizeof(uint32_t));
}
} else
av_hash_update(c->hash, pkt->side_data[i].data, pkt->side_data[i].size);
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), ", %8d, ", pkt->side_data[i].size);
len = strlen(buf);
av_hash_final_hex(c->hash, buf + len, sizeof(buf) - len);
av_hash_final_hex(c->hashes[0], buf + len, sizeof(buf) - len);
avio_write(s->pb, buf, strlen(buf));
}
}
@ -226,11 +249,12 @@ static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
return 0;
}
static int framehash_write_trailer(struct AVFormatContext *s)
static void framehash_free(struct AVFormatContext *s)
{
struct HashContext *c = s->priv_data;
av_hash_freep(&c->hash);
return 0;
if (c->hashes)
av_hash_freep(&c->hashes[0]);
av_freep(&c->hashes);
}
#endif
@ -248,9 +272,10 @@ AVOutputFormat ff_framehash_muxer = {
.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,
.write_trailer = framehash_write_trailer,
.deinit = framehash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framehash_class,
@ -271,9 +296,10 @@ AVOutputFormat ff_framemd5_muxer = {
.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,
.write_trailer = framehash_write_trailer,
.deinit = framehash_free,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framemd5_class,