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Implement av_get_image_linesize() and use it in

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ff_get_plane_bytewidth().

The new implementation is more generic, more compact and more correct.

Originally committed as revision 24786 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-08-12 15:05:58 +00:00
parent 27014bf5a3
commit 7906e2b974
5 changed files with 35 additions and 49 deletions
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2
libavcodec/avcodec.h
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@ -31,7 +31,7 @@
#define LIBAVCODEC_VERSION_MAJOR 52
#define LIBAVCODEC_VERSION_MINOR 85
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \

48
libavcodec/imgconvert.c
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@ -796,53 +796,7 @@ void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
{
int bits;
const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
pf = &pix_fmt_info[pix_fmt];
switch(pf->pixel_type) {
case FF_PIXEL_PACKED:
switch(pix_fmt) {
case PIX_FMT_YUYV422:
case PIX_FMT_UYVY422:
case PIX_FMT_RGB565BE:
case PIX_FMT_RGB565LE:
case PIX_FMT_RGB555BE:
case PIX_FMT_RGB555LE:
case PIX_FMT_RGB444BE:
case PIX_FMT_RGB444LE:
case PIX_FMT_BGR565BE:
case PIX_FMT_BGR565LE:
case PIX_FMT_BGR555BE:
case PIX_FMT_BGR555LE:
case PIX_FMT_BGR444BE:
case PIX_FMT_BGR444LE:
bits = 16;
break;
case PIX_FMT_UYYVYY411:
bits = 12;
break;
default:
bits = pf->depth * pf->nb_channels;
break;
}
return (width * bits + 7) >> 3;
break;
case FF_PIXEL_PLANAR:
if ((pix_fmt != PIX_FMT_NV12 && pix_fmt != PIX_FMT_NV21) &&
(plane == 1 || plane == 2))
width= -((-width)>>desc->log2_chroma_w);
return (width * pf->depth + 7) >> 3;
break;
case FF_PIXEL_PALETTE:
if (plane == 0)
return width;
break;
}
return -1;
return av_get_image_linesize(pix_fmt, width, plane);
}
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],

2
libavcore/avcore.h
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@ -27,7 +27,7 @@
#include <libavutil/avutil.h>
#define LIBAVCORE_VERSION_MAJOR 0
#define LIBAVCORE_VERSION_MINOR 3
#define LIBAVCORE_VERSION_MINOR 4
#define LIBAVCORE_VERSION_MICRO 0
#define LIBAVCORE_VERSION_INT AV_VERSION_INT(LIBAVCORE_VERSION_MAJOR, \

24
libavcore/imgutils.c
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@ -24,6 +24,30 @@
#include "imgutils.h"
#include "libavutil/pixdesc.h"
int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane)
{
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
int max_step [4]; /* max pixel step for each plane */
int max_step_comp[4]; /* the component for each plane which has the max pixel step */
int s, i;
if (desc->flags & PIX_FMT_BITSTREAM)
return (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
memset(max_step , 0, sizeof(max_step ));
memset(max_step_comp, 0, sizeof(max_step_comp));
for (i = 0; i < 4; i++) {
const AVComponentDescriptor *comp = &(desc->comp[i]);
if ((comp->step_minus1+1) > max_step[comp->plane]) {
max_step [comp->plane] = comp->step_minus1+1;
max_step_comp[comp->plane] = i;
}
}
s = (max_step_comp[plane] == 1 || max_step_comp[plane] == 2) ? desc->log2_chroma_w : 0;
return max_step[plane] * (((width + (1 << s) - 1)) >> s);
}
int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
{
int i;

8
libavcore/imgutils.h
View File

@ -27,6 +27,14 @@
#include "libavutil/pixfmt.h"
#include "avcore.h"
/**
* Compute the size of an image line with format pix_fmt and width
* width for the plane plane.
*
* @return the computed size in bytes
*/
int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane);
/**
* Fill plane linesizes for an image with pixel format pix_fmt and
* width width.