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lagarith: rgb24 support

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-18 00:09:26 +01:00
parent 21dfd1591e
commit 0db7b30700
1 changed files with 44 additions and 0 deletions
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44
libavcodec/lagarith.c
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@ -524,6 +524,50 @@ static int lag_decode_frame(AVCodecContext *avctx,
srcs[i] += l->rgb_stride;
}
break;
case FRAME_ARITH_RGB24:
avctx->pix_fmt = PIX_FMT_RGB24;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
offs[0] = offset_bv;
offs[1] = offset_gu;
offs[2] = 9;
if (!l->rgb_planes) {
l->rgb_stride = FFALIGN(avctx->width, 16);
l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 3);
if (!l->rgb_planes) {
av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
return AVERROR(ENOMEM);
}
}
for (i = 0; i < 3; i++)
srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
for (i = 0; i < 3; i++)
lag_decode_arith_plane(l, srcs[i],
avctx->width, avctx->height,
-l->rgb_stride, buf + offs[i],
buf_size);
dst = p->data[0];
for (i = 0; i < 3; i++)
srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++) {
uint8_t r, g, b;
r = srcs[0][i];
g = srcs[1][i];
b = srcs[2][i];
dst[3*i+0] = r+g;
dst[3*i+1] = g;
dst[3*i+2] = b+g;
}
dst += p->linesize[0];
for (i = 0; i < 3; i++)
srcs[i] += l->rgb_stride;
}
break;
case FRAME_ARITH_YV12:
avctx->pix_fmt = PIX_FMT_YUV420P;