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Re-implement avpicture_layout() using pixdesc and imgutils API.

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The new implementation is more compact, more correct and doesn't hurt
the eyes.

Originally committed as revision 25792 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-11-21 21:25:06 +00:00
parent 6a269f35ee
commit d2cbdb17b5
1 changed files with 13 additions and 50 deletions
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63
libavcodec/imgconvert.c
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@ -490,68 +490,31 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
unsigned char *dest, int dest_size)
{
const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
int i, j, nb_planes = 0, linesizes[4];
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
int i, j, w, ow, h, oh, data_planes;
const unsigned char* s;
int size = avpicture_get_size(pix_fmt, width, height);
if (size > dest_size || size < 0)
return -1;
return AVERROR(EINVAL);
if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
if (pix_fmt == PIX_FMT_YUYV422 ||
pix_fmt == PIX_FMT_UYVY422 ||
pix_fmt == PIX_FMT_BGR565BE ||
pix_fmt == PIX_FMT_BGR565LE ||
pix_fmt == PIX_FMT_BGR555BE ||
pix_fmt == PIX_FMT_BGR555LE ||
pix_fmt == PIX_FMT_BGR444BE ||
pix_fmt == PIX_FMT_BGR444LE ||
pix_fmt == PIX_FMT_RGB565BE ||
pix_fmt == PIX_FMT_RGB565LE ||
pix_fmt == PIX_FMT_RGB555BE ||
pix_fmt == PIX_FMT_RGB555LE ||
pix_fmt == PIX_FMT_RGB444BE ||
pix_fmt == PIX_FMT_RGB444LE)
w = width * 2;
else if (pix_fmt == PIX_FMT_UYYVYY411)
w = width + width/2;
else if (pix_fmt == PIX_FMT_PAL8)
w = width;
else
w = width * (pf->depth * pf->nb_channels / 8);
for (i = 0; i < desc->nb_components; i++)
nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
nb_planes++;
data_planes = 1;
h = height;
} else {
data_planes = pf->nb_channels;
w = (width*pf->depth + 7)/8;
h = height;
}
av_image_fill_linesizes(linesizes, pix_fmt, width);
for (i = 0; i < nb_planes; i++) {
int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
h = (height + (1 << s) - 1) >> s;
ow = w;
oh = h;
for (i=0; i<data_planes; i++) {
if (i == 1) {
w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
h = -((-height) >> desc->log2_chroma_h);
if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
w <<= 1;
} else if (i == 3) {
w = ow;
h = oh;
}
s = src->data[i];
for(j=0; j<h; j++) {
memcpy(dest, s, w);
dest += w;
for (j = 0; j < h; j++) {
memcpy(dest, s, linesizes[i]);
dest += linesizes[i];
s += src->linesize[i];
}
}
if (pf->pixel_type == FF_PIXEL_PALETTE)
if (desc->flags & PIX_FMT_PAL)
memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
return size;