[FFmpeg-cvslog] [PATCH] IFF Amiga Continuous Bitmap (ACBM)decoder
ami_stuff
git at videolan.org
Mon Nov 21 23:45:39 CET 2011
ffmpeg | branch: master | ami_stuff <ami_stuff at o2.pl> | Mon Nov 21 20:31:47 2011 +0100| [cf14c822275301209c307fb35351d5c9833b7a3b] | committer: Michael Niedermayer
[PATCH] IFF Amiga Continuous Bitmap (ACBM)decoder
Some sample IFF ACBM files can be found here:
http://aminet.net/package/dev/basic/ABdemos
Thanks to Peter Ross for his help with this patch.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cf14c822275301209c307fb35351d5c9833b7a3b
---
Changelog | 1 +
libavcodec/iff.c | 13 ++++++++++++-
libavformat/iff.c | 5 ++++-
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index 19472d4..b781f33 100644
--- a/Changelog
+++ b/Changelog
@@ -123,6 +123,7 @@ easier to use. The changes are:
- OS X Video Decoder Acceleration (VDA) support
- compact and csv output in ffprobe
- pan audio filter
+- IFF Amiga Continuous Bitmap (ACBM) decoder
version 0.8:
diff --git a/libavcodec/iff.c b/libavcodec/iff.c
index 39fa732..c4c614e 100644
--- a/libavcodec/iff.c
+++ b/libavcodec/iff.c
@@ -440,7 +440,18 @@ static int decode_frame_ilbm(AVCodecContext *avctx,
}
s->init = 1;
- if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
+ if (avctx->codec_tag == MKTAG('A','C','B','M')) {
+ if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
+ memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
+ for (plane = 0; plane < s->bpp; plane++) {
+ for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
+ uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
+ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
+ buf += s->planesize;
+ }
+ }
+ }
+ } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
for(y = 0; y < avctx->height; y++ ) {
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
diff --git a/libavformat/iff.c b/libavformat/iff.c
index 7601d6d..a816af5 100644
--- a/libavformat/iff.c
+++ b/libavformat/iff.c
@@ -43,6 +43,7 @@
#define ID_BMHD MKTAG('B','M','H','D')
#define ID_CAMG MKTAG('C','A','M','G')
#define ID_CMAP MKTAG('C','M','A','P')
+#define ID_ACBM MKTAG('A','C','B','M')
#define ID_FORM MKTAG('F','O','R','M')
#define ID_ANNO MKTAG('A','N','N','O')
@@ -53,6 +54,7 @@
#define ID_FVER MKTAG('F','V','E','R')
#define ID_NAME MKTAG('N','A','M','E')
#define ID_TEXT MKTAG('T','E','X','T')
+#define ID_ABIT MKTAG('A','B','I','T')
#define ID_BODY MKTAG('B','O','D','Y')
#define ID_ANNO MKTAG('A','N','N','O')
@@ -118,7 +120,7 @@ static int iff_probe(AVProbeData *p)
const uint8_t *d = p->buf;
if ( AV_RL32(d) == ID_FORM &&
- (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM) )
+ (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM || AV_RL32(d+8) == ID_ACBM) )
return AVPROBE_SCORE_MAX;
return 0;
}
@@ -166,6 +168,7 @@ static int iff_read_header(AVFormatContext *s,
}
break;
+ case ID_ABIT:
case ID_BODY:
iff->body_pos = avio_tell(pb);
iff->body_size = data_size;
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