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lagarith: add decode support for arith rgb24 mode

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Thad Ward 2011-12-27 23:45:55 -06:00 committed by Anton Khirnov
parent 8f5216905f
commit 7af507ea99
1 changed files with 22 additions and 10 deletions
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32
libavcodec/lagarith.c
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@ -447,7 +447,7 @@ static int lag_decode_frame(AVCodecContext *avctx,
uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
int offs[4];
uint8_t *srcs[4], *dst;
int i, j;
int i, j, planes = 3;
AVFrame *picture = data;
@ -480,33 +480,39 @@ static int lag_decode_frame(AVCodecContext *avctx,
break;
case FRAME_ARITH_RGBA:
avctx->pix_fmt = PIX_FMT_RGB32;
planes = 4;
offset_ry += 4;
offs[3] = AV_RL32(buf + 9);
case FRAME_ARITH_RGB24:
if (frametype == 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] = 13;
offs[3] = AV_RL32(buf + 9);
offs[2] = offset_ry;
if (!l->rgb_planes) {
l->rgb_stride = FFALIGN(avctx->width, 16);
l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 4);
l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * planes);
if (!l->rgb_planes) {
av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
return AVERROR(ENOMEM);
}
}
for (i = 0; i < 4; i++)
for (i = 0; i < planes; i++)
srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
for (i = 0; i < 4; i++)
for (i = 0; i < planes; 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 < 4; i++)
for (i = 0; i < planes; 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++) {
@ -514,13 +520,19 @@ static int lag_decode_frame(AVCodecContext *avctx,
r = srcs[0][i];
g = srcs[1][i];
b = srcs[2][i];
a = srcs[3][i];
r += g;
b += g;
AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
if (frametype == FRAME_ARITH_RGBA) {
a = srcs[3][i];
AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
} else {
dst[i * 3 + 0] = r;
dst[i * 3 + 1] = g;
dst[i * 3 + 2] = b;
}
}
dst += p->linesize[0];
for (i = 0; i < 4; i++)
for (i = 0; i < planes; i++)
srcs[i] += l->rgb_stride;
}
break;