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Code Issues Releases Activity

avformat/framehash: add sidedata checksum

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2016-04-13 17:58:40 -03:00
parent 2ea5ab6fc6
commit 868bce48f6
1 changed files with 29 additions and 3 deletions
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32
libavformat/hashenc.c
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@ -22,6 +22,7 @@
#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"
@ -189,13 +190,38 @@ static int framehash_write_header(struct AVFormatContext *s)
static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct HashContext *c = s->priv_data;
char buf[256];
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) - 64, "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, ",
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);
hash_finish(s, buf);
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;
}