[FFmpeg-cvslog] Write 32bit palette to Targa files.
Carl Eugen Hoyos
git at videolan.org
Tue Oct 9 10:15:06 CEST 2012
ffmpeg | branch: master | Carl Eugen Hoyos <cehoyos at ag.or.at> | Tue Oct 9 10:13:14 2012 +0200| [61a9f099b7da38722f758db38d9c89d1b39f3a87] | committer: Carl Eugen Hoyos
Write 32bit palette to Targa files.
Current ImageMagick fails to read such files,
therefore only write the 32bit palette if the
palette actually contains any transparency
information.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=61a9f099b7da38722f758db38d9c89d1b39f3a87
---
libavcodec/targaenc.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/libavcodec/targaenc.c b/libavcodec/targaenc.c
index 35e3ea5..4a71f27 100644
--- a/libavcodec/targaenc.c
+++ b/libavcodec/targaenc.c
@@ -103,16 +103,27 @@ static int targa_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
avctx->bits_per_coded_sample = av_get_bits_per_pixel(&av_pix_fmt_descriptors[avctx->pix_fmt]);
switch(avctx->pix_fmt) {
- case AV_PIX_FMT_PAL8:
+ case AV_PIX_FMT_PAL8: {
+ int pal_bpp = 24; /* Only write 32bit palette if there is transparency information */
+ for (i = 0; i < 256; i++)
+ if (AV_RN32(p->data[1] + 4 * i) >> 24 != 0xFF) {
+ pal_bpp = 32;
+ break;
+ }
pkt->data[1] = 1; /* palette present */
pkt->data[2] = TGA_PAL; /* uncompressed palettised image */
pkt->data[6] = 1; /* palette contains 256 entries */
- pkt->data[7] = 24; /* palette contains 24 bit entries */
+ pkt->data[7] = pal_bpp; /* palette contains pal_bpp bit entries */
pkt->data[16] = 8; /* bpp */
for (i = 0; i < 256; i++)
+ if (pal_bpp == 32) {
+ AV_WL32(pkt->data + 18 + 4 * i, *(uint32_t *)(p->data[1] + i * 4));
+ } else {
AV_WL24(pkt->data + 18 + 3 * i, *(uint32_t *)(p->data[1] + i * 4));
- out += 256 * 3; /* skip past the palette we just output */
+ }
+ out += 32 * pal_bpp; /* skip past the palette we just output */
break;
+ }
case AV_PIX_FMT_GRAY8:
pkt->data[2] = TGA_BW; /* uncompressed grayscale image */
avctx->bits_per_coded_sample = 0x28;
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