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lavf/bink: Support Monkey Island 4 (SMUSH) files.

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Fixes ticket #5410.
This commit is contained in:
Carl Eugen Hoyos 2016-04-15 21:22:10 +02:00
parent 139cbeb75e
commit 6d39132fd4
2 changed files with 20 additions and 3 deletions
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21
libavformat/bink.c
View File

@ -45,6 +45,7 @@ enum BinkAudFlags {
#define BINK_MAX_AUDIO_TRACKS 256
#define BINK_MAX_WIDTH 7680
#define BINK_MAX_HEIGHT 4800
#define SMUSH_BLOCK_SIZE 512
typedef struct BinkDemuxContext {
uint32_t file_size;
@ -55,12 +56,15 @@ typedef struct BinkDemuxContext {
int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
uint32_t remain_packet_size;
int smush_size;
} BinkDemuxContext;
static int probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
do {
if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
(b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) ||
(b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
@ -70,6 +74,8 @@ static int probe(AVProbeData *p)
AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
return AVPROBE_SCORE_MAX;
b += SMUSH_BLOCK_SIZE;
} while (smush && b < p->buf + p->buf_size - 32);
return 0;
}
@ -90,6 +96,17 @@ static int read_header(AVFormatContext *s)
return AVERROR(ENOMEM);
vst->codecpar->codec_tag = avio_rl32(pb);
if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
do {
bink->smush_size += SMUSH_BLOCK_SIZE;
avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
vst->codecpar->codec_tag = avio_rl32(pb);
} while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
if (avio_feof(pb)) {
av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
return AVERROR_INVALIDDATA;
}
}
bink->file_size = avio_rl32(pb) + 8;
vst->duration = avio_rl32(pb);
@ -195,7 +212,7 @@ static int read_header(AVFormatContext *s)
}
if (vst->index_entries)
avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
else
avio_skip(pb, 4);
@ -279,7 +296,7 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, in
return -1;
/* seek to the first frame */
if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
if (avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET) < 0)
return -1;
bink->video_pts = 0;

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 57
#define LIBAVFORMAT_VERSION_MINOR 34
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \