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Palette support for newer KMVC 

Originally committed as revision 5435 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-05-31 04:52:02 +00:00
parent 74c53c2da7
commit 2d2b86c207
1 changed files with 27 additions and 4 deletions
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31
libavcodec/kmvc.c
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@ -242,8 +242,17 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
return -1;
}
header = buf[0];
buf++;
header = *buf++;
/* blocksize 127 is really palette change event */
if (buf[0] == 127) {
buf += 3;
for (i = 0; i < 127; i++) {
ctx->pal[i + (header & 0x81)] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
buf += 4;
}
buf -= 127 * 4 + 3;
}
if (header & KMVC_KEYFRAME) {
ctx->pic.key_frame = 1;
@ -253,6 +262,13 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
ctx->pic.pict_type = FF_P_TYPE;
}
/* if palette has been changed, copy it from palctrl */
if (ctx->avctx->palctrl && ctx->avctx->palctrl->palette_changed) {
memcpy(ctx->pal, ctx->avctx->palctrl->palette, AVPALETTE_SIZE);
ctx->setpal = 1;
ctx->avctx->palctrl->palette_changed = 0;
}
if (header & KMVC_PALETTE) {
ctx->pic.palette_has_changed = 1;
// palette starts from index 1 and has 127 entries
@ -272,12 +288,16 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
blocksize = *buf++;
if (blocksize != 8) {
if (blocksize != 8 && blocksize != 127) {
av_log(avctx, AV_LOG_ERROR, "Block size = %i\n", blocksize);
return -1;
}
memset(ctx->cur, 0, 320 * 200);
switch (header & KMVC_METHOD) {
case 0:
case 1: // used in palette changed event
memcpy(ctx->cur, ctx->prev, 320 * 200);
break;
case 3:
kmvc_decode_intra_8x8(ctx, buf, avctx->width, avctx->height);
break;
@ -351,11 +371,14 @@ static int decode_init(AVCodecContext * avctx)
if (avctx->extradata_size == 1036) { // palette in extradata
uint8_t *src = avctx->extradata + 12;
for (i = 0; i < c->palsize; i++) {
for (i = 0; i < 256; i++) {
c->pal[i] = LE_32(src);
src += 4;
}
c->setpal = 1;
if (c->avctx->palctrl) {
c->avctx->palctrl->palette_changed = 0;
}
}
avctx->pix_fmt = PIX_FMT_PAL8;