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avformat/img2dec: add GEM Raster image demuxer

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Signed-off-by: Peter Ross <pross@xvid.org>
This commit is contained in:
Peter Ross
2021-09-15 20:15:42 +10:00
parent 60a9d3778f
commit 4ff8840697
4 changed files with 28 additions and 2 deletions
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22
libavformat/img2dec.c
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@@ -1105,6 +1105,27 @@ static int photocd_probe(const AVProbeData *p)
return AVPROBE_SCORE_MAX - 1;
}
static int gem_probe(const AVProbeData *p)
{
const uint8_t *b = p->buf;
int ret = 0;
if ( AV_RB16(b ) >= 1 && AV_RB16(b ) <= 3 &&
AV_RB16(b + 2) >= 8 && AV_RB16(b + 2) <= 779 &&
(AV_RB16(b + 4) > 0 || AV_RB16(b + 4) <= 8) &&
(AV_RB16(b + 6) > 0 || AV_RB16(b + 6) <= 8) &&
AV_RB16(b + 8) &&
AV_RB16(b + 10) &&
AV_RB16(b + 12) &&
AV_RB16(b + 14)) {
ret = AVPROBE_SCORE_EXTENSION / 4;
if (AV_RN32(b + 16) == AV_RN32("STTT") ||
AV_RN32(b + 16) == AV_RN32("TIMG") ||
AV_RN32(b + 16) == AV_RN32("XIMG"))
ret += 1;
}
return ret;
}
#define IMAGEAUTO_DEMUXER(imgname, codecid)\
const AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
.name = AV_STRINGIFY(imgname) "_pipe",\
@@ -1123,6 +1144,7 @@ IMAGEAUTO_DEMUXER(cri, AV_CODEC_ID_CRI)
IMAGEAUTO_DEMUXER(dds, AV_CODEC_ID_DDS)
IMAGEAUTO_DEMUXER(dpx, AV_CODEC_ID_DPX)
IMAGEAUTO_DEMUXER(exr, AV_CODEC_ID_EXR)
IMAGEAUTO_DEMUXER(gem, AV_CODEC_ID_GEM)
IMAGEAUTO_DEMUXER(gif, AV_CODEC_ID_GIF)
IMAGEAUTO_DEMUXER(j2k, AV_CODEC_ID_JPEG2000)
IMAGEAUTO_DEMUXER(jpeg, AV_CODEC_ID_MJPEG)