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8767c46873
mpv/video/img_format.c
wm4 8767c46873 img_format: add some mpv-only helper formats 
Utterly useless, but the intention is to make dealing with corner case
pixel formats (forced upon us by FFmpeg, very rarely) less of a pain.
The zimg wrapper will use them. (It already supports these formats
automatically, but it will help with its internals.)

Y1 is considered RGB, even though gray formats are generally treated as
YUV for various reasons. mpv will default all YUV formats to limited
range internally, which makes no sense for a 1 bit format, so this is a
problem. I wanted to avoid that mp_image_params_guess_csp() (which
applies the default) explicitly checks for an image format, so although
a bit janky, this seems to be a good solution, especially because I
really don't give a shit about these formats, other than having to
handle them. It's notable that AV_PIX_FMT_MONOBLACK (also 1 bit gray,
just packed) already explicitly marked itself as RGB.
2020-04-23 13:24:35 +02:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <string.h>
#include <libavcodec/avcodec.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
#include "config.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/fmt-conversion.h"
struct mp_imgfmt_entry {
const char *name;
// valid if desc.id is set
struct mp_imgfmt_desc desc;
// valid if reg_desc.component_size is set
struct mp_regular_imgfmt reg_desc;
// valid if non-0 and no reg_desc
enum mp_csp forced_csp;
enum mp_component_type ctype;
};
#define FRINGE_GBRP(def, dname, bits) \
[def - IMGFMT_CUST_BASE] = { \
.name = dname, \
.reg_desc = { .component_type = MP_COMPONENT_TYPE_UINT, \
.component_size = 1, .component_pad = bits - 8, \
.num_planes = 3, .forced_csp = MP_CSP_RGB, \
.planes = { {1, {2}}, {1, {3}}, {1, {1}} }, }, }
static const struct mp_imgfmt_entry mp_imgfmt_list[] = {
// not in ffmpeg
[IMGFMT_VDPAU_OUTPUT - IMGFMT_CUST_BASE] = {
.name = "vdpau_output",
.desc = {
.id = IMGFMT_VDPAU_OUTPUT,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BE | MP_IMGFLAG_LE | MP_IMGFLAG_RGB |
MP_IMGFLAG_HWACCEL,
},
},
[IMGFMT_RGB30 - IMGFMT_CUST_BASE] = {
.name = "rgb30",
.desc = {
.id = IMGFMT_RGB30,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BYTE_ALIGNED | MP_IMGFLAG_NE | MP_IMGFLAG_RGB,
.num_planes = 1,
.align_x = 1,
.align_y = 1,
.bytes = {4},
.bpp = {32},
.plane_bits = 30,
.component_bits = 10,
},
.forced_csp = MP_CSP_RGB,
.ctype = MP_COMPONENT_TYPE_UINT,
},
[IMGFMT_YAP8 - IMGFMT_CUST_BASE] = {
.name = "yap8",
.reg_desc = {
.component_type = MP_COMPONENT_TYPE_UINT,
.component_size = 1,
.num_planes = 2,
.planes = { {1, {1}}, {1, {4}} },
},
},
[IMGFMT_YAP16 - IMGFMT_CUST_BASE] = {
.name = "yap16",
.reg_desc = {
.component_type = MP_COMPONENT_TYPE_UINT,
.component_size = 2,
.num_planes = 2,
.planes = { {1, {1}}, {1, {4}} },
},
},
[IMGFMT_Y1 - IMGFMT_CUST_BASE] = {
.name = "y1",
.reg_desc = {
.component_type = MP_COMPONENT_TYPE_UINT,
.component_size = 1,
.component_pad = -7,
.num_planes = 1,
.forced_csp = MP_CSP_RGB,
.planes = { {1, {1}} },
},
},
FRINGE_GBRP(IMGFMT_GBRP1, "gbrp1", 1),
FRINGE_GBRP(IMGFMT_GBRP2, "gbrp2", 2),
FRINGE_GBRP(IMGFMT_GBRP3, "gbrp3", 3),
FRINGE_GBRP(IMGFMT_GBRP4, "gbrp4", 4),
FRINGE_GBRP(IMGFMT_GBRP5, "gbrp5", 5),
FRINGE_GBRP(IMGFMT_GBRP6, "gbrp6", 6),
// in FFmpeg, but FFmpeg names have an annoying "_vld" suffix
[IMGFMT_VIDEOTOOLBOX - IMGFMT_CUST_BASE] = {
.name = "videotoolbox",
},
[IMGFMT_VAAPI - IMGFMT_CUST_BASE] = {
.name = "vaapi",
},
};
static const struct mp_imgfmt_entry *get_mp_desc(int imgfmt)
{
if (imgfmt < IMGFMT_CUST_BASE)
return NULL;
int index = imgfmt - IMGFMT_CUST_BASE;
if (index >= MP_ARRAY_SIZE(mp_imgfmt_list))
return NULL;
const struct mp_imgfmt_entry *e = &mp_imgfmt_list[index];
return e->name ? e : NULL;
}
char **mp_imgfmt_name_list(void)
{
int count = IMGFMT_END - IMGFMT_START;
char **list = talloc_zero_array(NULL, char *, count + 1);
int num = 0;
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
const char *name = mp_imgfmt_to_name(n);
if (strcmp(name, "unknown") != 0)
list[num++] = talloc_strdup(list, name);
}
return list;
}
int mp_imgfmt_from_name(bstr name)
{
if (bstr_equals0(name, "none"))
return 0;
for (int n = 0; n < MP_ARRAY_SIZE(mp_imgfmt_list); n++) {
const struct mp_imgfmt_entry *p = &mp_imgfmt_list[n];
if (p->name && bstr_equals0(name, p->name))
return IMGFMT_CUST_BASE + n;
}
return pixfmt2imgfmt(av_get_pix_fmt(mp_tprintf(80, "%.*s", BSTR_P(name))));
}
char *mp_imgfmt_to_name_buf(char *buf, size_t buf_size, int fmt)
{
const struct mp_imgfmt_entry *p = get_mp_desc(fmt);
const char *name = p ? p->name : NULL;
if (!name) {
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(imgfmt2pixfmt(fmt));
if (pixdesc)
name = pixdesc->name;
}
if (!name)
name = "unknown";
snprintf(buf, buf_size, "%s", name);
int len = strlen(buf);
if (len > 2 && buf[len - 2] == MP_SELECT_LE_BE('l', 'b') && buf[len - 1] == 'e')
buf[len - 2] = '\0';
return buf;
}
static struct mp_imgfmt_desc to_legacy_desc(int fmt, struct mp_regular_imgfmt reg)
{
struct mp_imgfmt_desc desc = {
.id = fmt,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BYTE_ALIGNED | MP_IMGFLAG_NE |
(reg.forced_csp ? MP_IMGFLAG_RGB | MP_IMGFLAG_RGB_P
: MP_IMGFLAG_YUV | MP_IMGFLAG_YUV_P),
.num_planes = reg.num_planes,
.chroma_xs = reg.chroma_xs,
.chroma_ys = reg.chroma_ys,
.component_bits = reg.component_size * 8 - abs(reg.component_pad),
};
desc.align_x = 1 << reg.chroma_xs;
desc.align_y = 1 << reg.chroma_ys;
desc.plane_bits = desc.component_bits;
for (int p = 0; p < reg.num_planes; p++) {
desc.bytes[p] = reg.component_size;
desc.bpp[p] = desc.bytes[p] * 8;
desc.xs[p] = p == 1 || p == 2 ? desc.chroma_xs : 0;
desc.ys[p] = p == 1 || p == 2 ? desc.chroma_ys : 0;
for (int c = 0; c < reg.planes[p].num_components; c++) {
if (reg.planes[p].components[c] == 4)
desc.flags |= MP_IMGFLAG_ALPHA;
}
}
return desc;
}
struct mp_imgfmt_desc mp_imgfmt_get_desc(int mpfmt)
{
const struct mp_imgfmt_entry *mpdesc = get_mp_desc(mpfmt);
if (mpdesc && mpdesc->desc.id)
return mpdesc->desc;
if (mpdesc && mpdesc->reg_desc.component_size)
return to_legacy_desc(mpfmt, mpdesc->reg_desc);
enum AVPixelFormat fmt = imgfmt2pixfmt(mpfmt);
const AVPixFmtDescriptor *pd = av_pix_fmt_desc_get(fmt);
if (!pd || pd->nb_components > 4 || fmt == AV_PIX_FMT_NONE ||
fmt == AV_PIX_FMT_UYYVYY411)
return (struct mp_imgfmt_desc) {0};
enum mp_component_type is_uint =
mp_imgfmt_get_component_type(mpfmt) == MP_COMPONENT_TYPE_UINT;
struct mp_imgfmt_desc desc = {
.id = mpfmt,
.avformat = fmt,
.chroma_xs = pd->log2_chroma_w,
.chroma_ys = pd->log2_chroma_h,
};
int planedepth[4] = {0};
int el_size = (pd->flags & AV_PIX_FMT_FLAG_BITSTREAM) ? 1 : 8;
bool need_endian = false; // single component is spread over >1 bytes
int shift = -1; // shift for all components, or -1 if not uniform
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
// multiple components per plane -> Y is definitive, ignore chroma
if (!desc.bpp[d.plane])
desc.bpp[d.plane] = d.step * el_size;
planedepth[d.plane] += d.depth;
need_endian |= (d.depth + d.shift) > 8;
if (c == 0)
desc.component_bits = d.depth;
if (d.depth != desc.component_bits)
desc.component_bits = 0;
if (c == 0)
shift = d.shift;
if (shift != d.shift)
shift = -1;
}
for (int p = 0; p < 4; p++) {
if (desc.bpp[p])
desc.num_planes++;
}
desc.plane_bits = planedepth[0];
// Check whether any components overlap other components (per plane).
// We're cheating/simplifying here: we assume that this happens if a shift
// is set - which is wrong in general (could be needed for padding, instead
// of overlapping bits of another component - use the "< 8" test to exclude
// "normal" formats which use this for padding, like p010).
// Needed for rgb444le/be.
bool component_byte_overlap = false;
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
component_byte_overlap |= d.shift > 0 && planedepth[d.plane] > 8 &&
desc.component_bits < 8;
}
// If every component sits in its own byte, or all components are within
// a single byte, no endian-dependent access is needed. If components
// stride bytes (like with packed 2 byte RGB formats), endian-dependent
// access is needed.
need_endian |= component_byte_overlap;
if (!need_endian) {
desc.flags |= MP_IMGFLAG_LE | MP_IMGFLAG_BE;
} else {
desc.flags |= (pd->flags & AV_PIX_FMT_FLAG_BE)
? MP_IMGFLAG_BE : MP_IMGFLAG_LE;
}
if ((pd->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
desc.flags |= MP_IMGFLAG_HWACCEL;
} else if (fmt == AV_PIX_FMT_XYZ12LE || fmt == AV_PIX_FMT_XYZ12BE) {
/* nothing */
} else if (!(pd->flags & AV_PIX_FMT_FLAG_RGB) &&
fmt != AV_PIX_FMT_MONOBLACK &&
fmt != AV_PIX_FMT_PAL8)
{
desc.flags |= MP_IMGFLAG_YUV;
} else {
desc.flags |= MP_IMGFLAG_RGB;
}
if (pd->flags & AV_PIX_FMT_FLAG_ALPHA)
desc.flags |= MP_IMGFLAG_ALPHA;
if (!(pd->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
!(pd->flags & AV_PIX_FMT_FLAG_BITSTREAM))
{
desc.flags |= MP_IMGFLAG_BYTE_ALIGNED;
for (int p = 0; p < desc.num_planes; p++)
desc.bytes[p] = desc.bpp[p] / 8;
}
if (pd->flags & AV_PIX_FMT_FLAG_PAL)
desc.flags |= MP_IMGFLAG_PAL;
if ((desc.flags & (MP_IMGFLAG_YUV | MP_IMGFLAG_RGB))
&& (desc.flags & MP_IMGFLAG_BYTE_ALIGNED)
&& !(pd->flags & AV_PIX_FMT_FLAG_PAL)
&& !component_byte_overlap
&& shift >= 0 && is_uint)
{
bool same_depth = true;
for (int p = 0; p < desc.num_planes; p++) {
same_depth &= planedepth[p] == planedepth[0] &&
desc.bpp[p] == desc.bpp[0];
}
if (same_depth && pd->nb_components == desc.num_planes) {
if (desc.flags & MP_IMGFLAG_YUV) {
desc.flags |= MP_IMGFLAG_YUV_P;
} else {
desc.flags |= MP_IMGFLAG_RGB_P;
}
}
if (pd->nb_components == 3 && desc.num_planes == 2 &&
planedepth[1] == planedepth[0] * 2 &&
desc.bpp[1] == desc.bpp[0] * 2 &&
(desc.flags & MP_IMGFLAG_YUV))
{
desc.flags |= MP_IMGFLAG_YUV_NV;
}
if (desc.flags & (MP_IMGFLAG_YUV_P | MP_IMGFLAG_RGB_P | MP_IMGFLAG_YUV_NV))
desc.component_bits += shift;
}
for (int p = 0; p < desc.num_planes; p++) {
desc.xs[p] = (p == 1 || p == 2) ? desc.chroma_xs : 0;
desc.ys[p] = (p == 1 || p == 2) ? desc.chroma_ys : 0;
}
desc.align_x = 1 << desc.chroma_xs;
desc.align_y = 1 << desc.chroma_ys;
if ((desc.bpp[0] % 8) != 0)
desc.align_x = 8 / desc.bpp[0]; // expect power of 2
if (desc.flags & MP_IMGFLAG_HWACCEL) {
desc.component_bits = 0;
desc.plane_bits = 0;
}
return desc;
}
static bool validate_regular_imgfmt(const struct mp_regular_imgfmt *fmt)
{
bool present[MP_NUM_COMPONENTS] = {0};
int n_comp = 0;
for (int n = 0; n < fmt->num_planes; n++) {
const struct mp_regular_imgfmt_plane *plane = &fmt->planes[n];
n_comp += plane->num_components;
if (n_comp > MP_NUM_COMPONENTS)
return false;
if (!plane->num_components)
return false; // no empty planes in between allowed
bool pad_only = true;
int chroma_luma = 0; // luma: 1, chroma: 2, both: 3
for (int i = 0; i < plane->num_components; i++) {
int comp = plane->components[i];
if (comp > MP_NUM_COMPONENTS)
return false;
if (comp == 0)
continue;
pad_only = false;
if (present[comp - 1])
return false; // no duplicates
present[comp - 1] = true;
chroma_luma |= (comp == 2 || comp == 3) ? 2 : 1;
}
if (pad_only)
return false; // no planes with only padding allowed
if ((fmt->chroma_xs > 0 || fmt->chroma_ys > 0) && chroma_luma == 3)
return false; // separate chroma/luma planes required
}
if (!(present[0] || present[3]) || // at least component 1 or alpha needed
(present[1] && !present[0]) || // component 2 requires component 1
(present[2] && !present[1])) // component 3 requires component 2
return false;
return true;
}
enum mp_csp mp_imgfmt_get_forced_csp(int imgfmt)
{
const struct mp_imgfmt_entry *p = get_mp_desc(imgfmt);
if (p && p->reg_desc.component_size)
return p->reg_desc.forced_csp;
if (p && p->forced_csp)
return p->forced_csp;
enum AVPixelFormat pixfmt = imgfmt2pixfmt(imgfmt);
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(pixfmt);
// FFmpeg does not provide a flag for XYZ, so this is the best we can do.
if (pixdesc && strncmp(pixdesc->name, "xyz", 3) == 0)
return MP_CSP_XYZ;
if (pixdesc && (pixdesc->flags & AV_PIX_FMT_FLAG_RGB))
return MP_CSP_RGB;
if (pixfmt == AV_PIX_FMT_PAL8 || pixfmt == AV_PIX_FMT_MONOBLACK)
return MP_CSP_RGB;
return MP_CSP_AUTO;
}
enum mp_component_type mp_imgfmt_get_component_type(int imgfmt)
{
const struct mp_imgfmt_entry *p = get_mp_desc(imgfmt);
if (p && p->reg_desc.component_size)
return p->reg_desc.component_type;
if (p && p->ctype)
return p->ctype;
const AVPixFmtDescriptor *pixdesc =
av_pix_fmt_desc_get(imgfmt2pixfmt(imgfmt));
if (!pixdesc || (pixdesc->flags & AV_PIX_FMT_FLAG_HWACCEL))
return MP_COMPONENT_TYPE_UNKNOWN;
if (pixdesc->flags & AV_PIX_FMT_FLAG_FLOAT)
return MP_COMPONENT_TYPE_FLOAT;
return MP_COMPONENT_TYPE_UINT;
}
int mp_find_other_endian(int imgfmt)
{
return pixfmt2imgfmt(av_pix_fmt_swap_endianness(imgfmt2pixfmt(imgfmt)));
}
static bool is_native_endian(const AVPixFmtDescriptor *pixdesc)
{
enum AVPixelFormat pixfmt = av_pix_fmt_desc_get_id(pixdesc);
enum AVPixelFormat other = av_pix_fmt_swap_endianness(pixfmt);
if (other == AV_PIX_FMT_NONE || other == pixfmt)
return true; // no endian nonsense
bool is_le = *(char *)&(uint32_t){1};
return pixdesc && (is_le != !!(pixdesc->flags & AV_PIX_FMT_FLAG_BE));
}
bool mp_get_regular_imgfmt(struct mp_regular_imgfmt *dst, int imgfmt)
{
struct mp_regular_imgfmt res = {0};
const AVPixFmtDescriptor *pixdesc =
av_pix_fmt_desc_get(imgfmt2pixfmt(imgfmt));
if (!pixdesc) {
const struct mp_imgfmt_entry *p = get_mp_desc(imgfmt);
if (p && p->reg_desc.component_size) {
*dst = p->reg_desc;
return true;
}
return false;
}
if ((pixdesc->flags & AV_PIX_FMT_FLAG_BITSTREAM) ||
(pixdesc->flags & AV_PIX_FMT_FLAG_HWACCEL) ||
(pixdesc->flags & AV_PIX_FMT_FLAG_PAL) ||
pixdesc->nb_components < 1 ||
pixdesc->nb_components > MP_NUM_COMPONENTS ||
!is_native_endian(pixdesc))
return false;
res.component_type = mp_imgfmt_get_component_type(imgfmt);
if (!res.component_type)
return false;
const AVComponentDescriptor *comp0 = &pixdesc->comp[0];
int depth = comp0->depth + comp0->shift;
if (depth < 1 || depth > 64)
return false;
res.component_size = (depth + 7) / 8;
for (int n = 0; n < pixdesc->nb_components; n++) {
const AVComponentDescriptor *comp = &pixdesc->comp[n];
if (comp->plane < 0 || comp->plane >= MP_MAX_PLANES)
return false;
res.num_planes = MPMAX(res.num_planes, comp->plane + 1);
// We support uniform depth only.
if (comp->depth != comp0->depth || comp->shift != comp0->shift)
return false;
// Uniform component size; even the padding must have same size.
int ncomp = comp->step / res.component_size;
if (!ncomp || ncomp * res.component_size != comp->step)
return false;
struct mp_regular_imgfmt_plane *plane = &res.planes[comp->plane];
if (plane->num_components && plane->num_components != ncomp)
return false;
plane->num_components = ncomp;
int pos = comp->offset / res.component_size;
if (pos < 0 || pos >= ncomp || ncomp > MP_NUM_COMPONENTS)
return false;
if (plane->components[pos])
return false;
plane->components[pos] = n + 1;
}
// Make sure alpha is always component 4.
if (pixdesc->nb_components == 2 && (pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA)) {
for (int n = 0; n < res.num_planes; n++) {
for (int i = 0; i < res.planes[n].num_components; i++) {
if (res.planes[n].components[i] == 2)
res.planes[n].components[i] = 4;
}
}
}
res.component_pad = comp0->depth - res.component_size * 8;
if (comp0->shift) {
// We support padding only on 1 side.
if (comp0->shift + comp0->depth != res.component_size * 8)
return false;
res.component_pad = -res.component_pad;
}
res.chroma_xs = pixdesc->log2_chroma_w;
res.chroma_ys = pixdesc->log2_chroma_h;
if (pixdesc->flags & AV_PIX_FMT_FLAG_BAYER)
return false; // it's satan himself
res.forced_csp = mp_imgfmt_get_forced_csp(imgfmt);
if (!validate_regular_imgfmt(&res))
return false;
*dst = res;
return true;
}
static bool regular_imgfmt_equals(struct mp_regular_imgfmt *a,
struct mp_regular_imgfmt *b)
{
if (a->component_type != b->component_type ||
a->component_size != b->component_size ||
a->num_planes != b->num_planes ||
a->component_pad != b->component_pad ||
a->forced_csp != b->forced_csp ||
a->chroma_xs != b->chroma_xs ||
a->chroma_ys != b->chroma_ys)
return false;
for (int n = 0; n < a->num_planes; n++) {
int num_comps = a->planes[n].num_components;
if (num_comps != b->planes[n].num_components)
return false;
for (int i = 0; i < num_comps; i++) {
if (a->planes[n].components[i] != b->planes[n].components[i])
return false;
}
}
return true;
}
// Find a format that matches this one exactly.
int mp_find_regular_imgfmt(struct mp_regular_imgfmt *src)
{
for (int n = IMGFMT_START + 1; n < IMGFMT_END; n++) {
struct mp_regular_imgfmt f;
if (mp_get_regular_imgfmt(&f, n) && regular_imgfmt_equals(src, &f))
return n;
}
return 0;
}
// Find a format that has the given flags set with the following configuration.
int mp_imgfmt_find(int xs, int ys, int planes, int component_bits, int flags)
{
for (int n = IMGFMT_START + 1; n < IMGFMT_END; n++) {
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(n);
if (desc.id && ((desc.flags & flags) == flags)) {
if (desc.num_planes == planes && desc.chroma_xs == xs &&
desc.chroma_ys == ys && desc.plane_bits == component_bits &&
(desc.flags & MP_IMGFLAG_NE))
return desc.id;
}
}
return 0;
}
// Compare the dst image formats, and return the one which can carry more data
// (e.g. higher depth, more color components, lower chroma subsampling, etc.),
// with respect to what is required to keep most of the src format.
// Returns the imgfmt, or 0 on error.
int mp_imgfmt_select_best(int dst1, int dst2, int src)
{
enum AVPixelFormat dst1pxf = imgfmt2pixfmt(dst1);
enum AVPixelFormat dst2pxf = imgfmt2pixfmt(dst2);
enum AVPixelFormat srcpxf = imgfmt2pixfmt(src);
enum AVPixelFormat dstlist[] = {dst1pxf, dst2pxf, AV_PIX_FMT_NONE};
return pixfmt2imgfmt(avcodec_find_best_pix_fmt_of_list(dstlist, srcpxf, 1, 0));
}
// Same as mp_imgfmt_select_best(), but with a list of dst formats.
int mp_imgfmt_select_best_list(int *dst, int num_dst, int src)
{
int best = 0;
for (int n = 0; n < num_dst; n++)
best = best ? mp_imgfmt_select_best(best, dst[n], src) : dst[n];
return best;
}
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