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| author | Roberto Togni <r_togni@tiscali.it> | 2003-11-02 21:55:38 +0000 |
|---|---|---|
| committer | Roberto Togni <r_togni@tiscali.it> | 2003-11-02 21:55:38 +0000 |
| commit | 5e29abf8b7efe6cfeee41d9f5e5f9fc98c1fcb93 (patch) | |
| tree | 286cb4fe2a1fd0f2daae9bdb55806875449f80f7 /libavformat/asf.c | |
| parent | 2e99641b1a366142e71f6816c1e7fcfeba8eca7b (diff) | |
| download | ffmpeg-5e29abf8b7efe6cfeee41d9f5e5f9fc98c1fcb93.tar.gz | |
Make avi and asf demuxer export palette in palctrl
Originally committed as revision 2465 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/asf.c')
| -rw-r--r-- | libavformat/asf.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libavformat/asf.c b/libavformat/asf.c index 044ba72d9b..b069b1d086 100644 --- a/libavformat/asf.c +++ b/libavformat/asf.c @@ -908,6 +908,22 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) st->codec.extradata = av_mallocz(st->codec.extradata_size); get_buffer(pb, st->codec.extradata, st->codec.extradata_size); } + + /* Extract palette from extradata if bpp <= 8 */ + /* This code assumes that extradata contains only palette */ + /* This is true for all paletted codecs implemented in ffmpeg */ + if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) { + st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl)); +#ifdef WORDS_BIGENDIAN + for (i = 0; i < FFMIN(st->codec.extradata_size / 4, 256); i++) + st->codec.palctrl->palette[i] = bswap_32(st->codec.extradata)[i * 4]); +#else + memcpy(st->codec.palctrl->palette, st->codec.extradata, + FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)); +#endif + st->codec.palctrl->palette_changed = 1; + } + st->codec.codec_tag = tag1; st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1); } @@ -1226,6 +1242,7 @@ static int asf_read_close(AVFormatContext *s) AVStream *st = s->streams[i]; av_free(st->priv_data); av_free(st->codec.extradata); + av_free(st->codec.palctrl); } return 0; } |