RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-22 07:20:45 +00:00
Code Issues Projects Releases Wiki Activity

lagarith: add some RGBA decoding support

Browse Source 
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Kostya Shishkov 2011-11-12 20:54:27 +01:00 committed by Martin Storsjö
parent 39616fc307
commit ffc638c283
1 changed files with 67 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
libavcodec/lagarith.c
View File

@ -51,6 +51,8 @@ typedef struct LagarithContext {
DSPContext dsp;
int zeros; /**< number of consecutive zero bytes encountered */
int zeros_rem; /**< number of zero bytes remaining to output */
uint8_t *rgb_planes;
int rgb_stride;
} LagarithContext;
/**
@ -443,6 +445,9 @@ static int lag_decode_frame(AVCodecContext *avctx,
AVFrame *const p = &l->picture;
uint8_t frametype = 0;
uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
int offs[4];
uint8_t *srcs[4], *dst;
int i, j;
AVFrame *picture = data;
@ -458,6 +463,67 @@ static int lag_decode_frame(AVCodecContext *avctx,
offset_bv = AV_RL32(buf + 5);
switch (frametype) {
case FRAME_SOLID_RGBA:
avctx->pix_fmt = PIX_FMT_RGB32;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
dst = p->data[0];
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++)
AV_WN32(dst + i * 4, offset_gu);
dst += p->linesize[0];
}
break;
case FRAME_ARITH_RGBA:
avctx->pix_fmt = PIX_FMT_RGB32;
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);
if (!l->rgb_planes) {
l->rgb_stride = FFALIGN(avctx->width, 16);
l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 4);
if (!l->rgb_planes) {
av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
return AVERROR(ENOMEM);
}
}
for (i = 0; i < 4; i++)
srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
for (i = 0; i < 4; 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++)
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, a;
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));
}
dst += p->linesize[0];
for (i = 0; i < 4; i++)
srcs[i] += l->rgb_stride;
}
break;
case FRAME_ARITH_YV12:
avctx->pix_fmt = PIX_FMT_YUV420P;
@ -504,6 +570,7 @@ static av_cold int lag_decode_end(AVCodecContext *avctx)
if (l->picture.data[0])
avctx->release_buffer(avctx, &l->picture);
av_freep(&l->rgb_planes);
return 0;
}