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mpv/video/sws_utils.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <assert.h>
#include <libavutil/opt.h>
#include "sws_utils.h"
#include "video/mp_image.h"
#include "video/img_format.h"
#include "fmt-conversion.h"
#include "csputils.h"
#include "core/mp_msg.h"
//global sws_flags from the command line
int sws_flags = 2;
float sws_lum_gblur = 0.0;
float sws_chr_gblur = 0.0;
int sws_chr_vshift = 0;
int sws_chr_hshift = 0;
float sws_chr_sharpen = 0.0;
float sws_lum_sharpen = 0.0;
//global srcFilter
static SwsFilter *src_filter = NULL;
void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam,
SwsFilter **dstFilterParam)
{
static int firstTime = 1;
*flags = 0;
if (firstTime) {
firstTime = 0;
*flags = SWS_PRINT_INFO;
} else if (mp_msg_test(MSGT_VFILTER, MSGL_DBG2))
*flags = SWS_PRINT_INFO;
if (src_filter)
sws_freeFilter(src_filter);
src_filter = sws_getDefaultFilter(
sws_lum_gblur, sws_chr_gblur,
sws_lum_sharpen, sws_chr_sharpen,
sws_chr_hshift, sws_chr_vshift, verbose > 1);
switch (sws_flags) {
case 0: *flags |= SWS_FAST_BILINEAR;
break;
case 1: *flags |= SWS_BILINEAR;
break;
case 2: *flags |= SWS_BICUBIC;
break;
case 3: *flags |= SWS_X;
break;
case 4: *flags |= SWS_POINT;
break;
case 5: *flags |= SWS_AREA;
break;
case 6: *flags |= SWS_BICUBLIN;
break;
case 7: *flags |= SWS_GAUSS;
break;
case 8: *flags |= SWS_SINC;
break;
case 9: *flags |= SWS_LANCZOS;
break;
case 10: *flags |= SWS_SPLINE;
break;
default: *flags |= SWS_BILINEAR;
break;
}
*srcFilterParam = src_filter;
*dstFilterParam = NULL;
}
// will use sws_flags & src_filter (from cmd line)
static struct SwsContext *sws_getContextFromCmdLine2(int srcW, int srcH,
int srcFormat, int dstW,
int dstH, int dstFormat,
int extraflags)
{
int flags;
SwsFilter *dstFilterParam, *srcFilterParam;
enum PixelFormat dfmt, sfmt;
dfmt = imgfmt2pixfmt(dstFormat);
sfmt = imgfmt2pixfmt(srcFormat);
if (srcFormat == IMGFMT_RGB8 || srcFormat == IMGFMT_BGR8)
sfmt = PIX_FMT_PAL8;
sws_getFlagsAndFilterFromCmdLine(&flags, &srcFilterParam, &dstFilterParam);
return sws_getContext(srcW, srcH, sfmt, dstW, dstH, dfmt, flags |
extraflags, srcFilterParam, dstFilterParam,
NULL);
}
struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat,
int dstW, int dstH,
int dstFormat)
{
return sws_getContextFromCmdLine2(srcW, srcH, srcFormat, dstW, dstH,
dstFormat,
0);
}
struct SwsContext *sws_getContextFromCmdLine_hq(int srcW, int srcH,
int srcFormat, int dstW,
int dstH,
int dstFormat)
{
return sws_getContextFromCmdLine2(
srcW, srcH, srcFormat, dstW, dstH, dstFormat,
SWS_FULL_CHR_H_INT | SWS_FULL_CHR_H_INP |
SWS_ACCURATE_RND | SWS_BITEXACT);
}
bool mp_sws_supported_format(int imgfmt)
{
enum PixelFormat av_format = imgfmt2pixfmt(imgfmt);
return av_format != PIX_FMT_NONE && sws_isSupportedInput(av_format)
&& sws_isSupportedOutput(av_format);
}
static int mp_csp_to_sws_colorspace(enum mp_csp csp)
{
switch (csp) {
case MP_CSP_BT_601: return SWS_CS_ITU601;
case MP_CSP_BT_709: return SWS_CS_ITU709;
case MP_CSP_SMPTE_240M: return SWS_CS_SMPTE240M;
default: return SWS_CS_DEFAULT;
}
}
// component_offset[]: byte index of each r (0), g (1), b (2), a (3) component
static void planarize32(struct mp_image *dst, struct mp_image *src,
int component_offset[4])
{
for (int y = 0; y < dst->h; y++) {
for (int p = 0; p < 3; p++) {
uint8_t *d_line = dst->planes[p] + y * dst->stride[p];
uint8_t *s_line = src->planes[0] + y * src->stride[0];
s_line += component_offset[(p + 1) % 3]; // GBR => RGB
for (int x = 0; x < dst->w; x++) {
d_line[x] = s_line[x * 4];
}
}
}
}
#define SET_COMPS(comp, r, g, b, a) \
{ (comp)[0] = (r); (comp)[1] = (g); (comp)[2] = (b); (comp)[3] = (a); }
static void to_gbrp(struct mp_image *dst, struct mp_image *src,
int my_sws_flags)
{
struct mp_image *temp = NULL;
int comp[4];
switch (src->imgfmt) {
case IMGFMT_ABGR: SET_COMPS(comp, 3, 2, 1, 0); break;
case IMGFMT_BGRA: SET_COMPS(comp, 2, 1, 0, 3); break;
case IMGFMT_ARGB: SET_COMPS(comp, 1, 2, 3, 0); break;
case IMGFMT_RGBA: SET_COMPS(comp, 0, 1, 2, 3); break;
default:
temp = alloc_mpi(dst->w, dst->h, IMGFMT_RGBA);
mp_image_swscale(temp, src, my_sws_flags);
src = temp;
SET_COMPS(comp, 0, 1, 2, 3);
}
planarize32(dst, src, comp);
talloc_free(temp);
}
void mp_image_swscale(struct mp_image *dst, struct mp_image *src,
int my_sws_flags)
{
if (dst->imgfmt == IMGFMT_GBRP)
return to_gbrp(dst, src, my_sws_flags);
enum PixelFormat s_fmt = imgfmt2pixfmt(src->imgfmt);
if (src->imgfmt == IMGFMT_RGB8 || src->imgfmt == IMGFMT_BGR8)
s_fmt = PIX_FMT_PAL8;
int s_csp = mp_csp_to_sws_colorspace(mp_image_csp(src));
int s_range = mp_image_levels(src) == MP_CSP_LEVELS_PC;
enum PixelFormat d_fmt = imgfmt2pixfmt(dst->imgfmt);
int d_csp = mp_csp_to_sws_colorspace(mp_image_csp(dst));
int d_range = mp_image_levels(dst) == MP_CSP_LEVELS_PC;
// Work around libswscale bug #1852 (fixed in ffmpeg commit 8edf9b1fa):
// setting range flags for RGB gives random bogus results.
// Newer libswscale always ignores range flags for RGB.
bool s_yuv = src->flags & MP_IMGFLAG_YUV;
bool d_yuv = dst->flags & MP_IMGFLAG_YUV;
s_range = s_range && s_yuv;
d_range = d_range && d_yuv;
struct SwsContext *sws = sws_alloc_context();
av_opt_set_int(sws, "sws_flags", my_sws_flags, 0);
av_opt_set_int(sws, "srcw", src->w, 0);
av_opt_set_int(sws, "srch", src->h, 0);
av_opt_set_int(sws, "src_format", s_fmt, 0);
av_opt_set_int(sws, "dstw", dst->w, 0);
av_opt_set_int(sws, "dsth", dst->h, 0);
av_opt_set_int(sws, "dst_format", d_fmt, 0);
sws_setColorspaceDetails(sws, sws_getCoefficients(s_csp), s_range,
sws_getCoefficients(d_csp), d_range,
0, 1 << 16, 1 << 16);
int res = sws_init_context(sws, NULL, NULL);
assert(res >= 0);
sws_scale(sws, (const uint8_t *const *) src->planes, src->stride,
0, src->h, dst->planes, dst->stride);
sws_freeContext(sws);
}
// vim: ts=4 sw=4 et tw=80
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