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2256a9e42b
mpv/video/img_format.c
wm4 2256a9e42b video: fix AV_PIX_FMT_UYYVYY411 allocation 
My previous commit added support for this format, but it was still
broken, and prevented the allocation code from working. It's unknown
whether it's correct now (because this pixfmt is so obscure and useless,
there are no known samples around), but who cares.
2020-05-18 19:29:25 +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/imgutils.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 bits!=0
struct mp_imgfmt_layout layout;
// 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}} }, }, }
#define FLOAT_YUV(def, dname, xs, ys, a_planes) \
[def - IMGFMT_CUST_BASE] = { \
.name = dname, \
.reg_desc = { .component_type = MP_COMPONENT_TYPE_FLOAT, \
.component_size = 4, .num_planes = a_planes, \
.planes = { {1, {1}}, {1, {2}}, {1, {3}}, {1, {4}} }, \
.chroma_xs = xs, .chroma_ys = ys, }}
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,
.bpp = {32},
},
.layout = { {32}, { {0, 20, 10}, {0, 10, 10}, {0, 0, 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}} },
},
},
[IMGFMT_YAPF - IMGFMT_CUST_BASE] = {
.name = "grayaf32", // try to mimic ffmpeg naming convention
.reg_desc = {
.component_type = MP_COMPONENT_TYPE_FLOAT,
.component_size = 4,
.num_planes = 2,
.planes = { {1, {1}}, {1, {4}} },
},
},
FLOAT_YUV(IMGFMT_444PF, "yuv444pf", 0, 0, 3),
FLOAT_YUV(IMGFMT_444APF, "yuva444pf", 0, 0, 4),
FLOAT_YUV(IMGFMT_420PF, "yuv420pf", 1, 1, 3),
FLOAT_YUV(IMGFMT_420APF, "yuva420pf", 1, 1, 4),
FLOAT_YUV(IMGFMT_422PF, "yuv422pf", 1, 0, 3),
FLOAT_YUV(IMGFMT_422APF, "yuva422pf", 1, 0, 4),
FLOAT_YUV(IMGFMT_440PF, "yuv440pf", 0, 1, 3),
FLOAT_YUV(IMGFMT_440APF, "yuva440pf", 0, 1, 4),
FLOAT_YUV(IMGFMT_410PF, "yuv410pf", 2, 2, 3),
FLOAT_YUV(IMGFMT_410APF, "yuva410pf", 2, 2, 4),
FLOAT_YUV(IMGFMT_411PF, "yuv411pf", 2, 0, 3),
FLOAT_YUV(IMGFMT_411APF, "yuva411pf", 2, 0, 4),
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,
};
desc.align_x = 1 << reg.chroma_xs;
desc.align_y = 1 << reg.chroma_ys;
for (int p = 0; p < reg.num_planes; p++) {
desc.bpp[p] = reg.component_size * 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;
}
void mp_imgfmt_get_layout(int mpfmt, struct mp_imgfmt_layout *p_desc)
{
const struct mp_imgfmt_entry *mpdesc = get_mp_desc(mpfmt);
if (mpdesc && mpdesc->reg_desc.component_size) {
*p_desc = (struct mp_imgfmt_layout){{0}};
return;
}
if (mpdesc && mpdesc->layout.bits) {
*p_desc = mpdesc->layout;
return;
}
enum AVPixelFormat fmt = imgfmt2pixfmt(mpfmt);
const AVPixFmtDescriptor *pd = av_pix_fmt_desc_get(fmt);
if (!pd ||
(pd->flags & AV_PIX_FMT_FLAG_PAL) ||
(pd->flags & AV_PIX_FMT_FLAG_HWACCEL))
goto fail;
bool has_alpha = pd->flags & AV_PIX_FMT_FLAG_ALPHA;
if (pd->nb_components != 1 + has_alpha &&
pd->nb_components != 3 + has_alpha)
goto fail;
struct mp_imgfmt_layout desc = {0};
// Very convenient: we assume we're always on little endian, and FFmpeg
// explicitly marks big endian formats => don't need to guess whether a
// format is little endian, or not affected by byte order.
bool is_be = pd->flags & AV_PIX_FMT_FLAG_BE;
// Packed sub-sampled YUV is very... special.
bool is_packed_ss_yuv = pd->log2_chroma_w && !pd->log2_chroma_h &&
(1 << pd->log2_chroma_w) <= MP_ARRAY_SIZE(desc.extra_luma_offsets) + 1 &&
pd->comp[1].plane == 0 && pd->comp[2].plane == 0 &&
pd->nb_components == 3;
if (is_packed_ss_yuv) {
desc.extra_w = (1 << pd->log2_chroma_w) - 1;
desc.bits[0] = pd->comp[1].step * 8;
}
int num_planes = 0;
int el_bits = (pd->flags & AV_PIX_FMT_FLAG_BITSTREAM) ? 1 : 8;
for (int c = 0; c < pd->nb_components; c++) {
const AVComponentDescriptor *d = &pd->comp[c];
if (d->plane >= MP_MAX_PLANES)
goto fail;
num_planes = MPMAX(num_planes, d->plane + 1);
int plane_bits = desc.bits[d->plane];
int c_bits = d->step * el_bits;
// The first component wins, because either all components result in
// the same value, or luma wins (luma always comes before chroma).
if (plane_bits) {
if (c_bits > plane_bits)
goto fail; // inconsistent
} else {
desc.bits[d->plane] = plane_bits = c_bits;
}
int shift = d->shift;
// What the fuck: for some inexplicable reason, MONOB uses shift=7
// in pixdesc, which is basically out of bounds. Pixdesc bug?
// Make it behave like MONOW. (No, the bit-order is not different.)
if (fmt == AV_PIX_FMT_MONOBLACK)
shift = 0;
int offset = d->offset * el_bits;
// The pixdesc logic for reading and endian swapping is as follows
// (reverse engineered from av_read_image_line2()):
// - determine a word size that will include the component fully;
// this includes the "active" bits and the amount "shifted" away
// (for example shift=7/depth=18 => 32 bit word reading [31:0])
// - the same format can use different word sizes (e.g. bgr565: the R
// component at offset 0 is read as 8 bit; BG is read as 16 bits)
// - if BE flag is set, swap the word before proceeding
// - extract via shift and mask derived by depth
int word = mp_round_next_power_of_2(MPMAX(d->depth + shift, 8)) / 8;
// The purpose of this is unknown. It's an absurdity fished out of
// av_read_image_line2()'s implementation. It seems technically
// unnecessary, and provides no information. On the other hand, it
// compensates for seemingly bogus packed integer pixdescs; this
// is "why" some formats use d->offset = -1.
if (is_be && el_bits == 8 && word == 1)
offset += 8;
// Pixdesc's model requires accesses with varying word-sizes. This
// is complete bullshit, so we transform it into word swaps before
// further processing.
if (is_be && word == 1) {
// Probably packed RGB formats with varying word sizes. Assume
// the word access size is the entire pixel.
if (plane_bits % 8 || plane_bits >= 64)
goto fail;
if (!desc.endian_bytes)
desc.endian_bytes = plane_bits / 8;
if (desc.endian_bytes != plane_bits / 8)
goto fail;
offset = desc.endian_bytes * 8 - 8 - offset;
}
if (is_be && word > 1) {
if (desc.endian_bytes && desc.endian_bytes != word)
goto fail; // fortunately not needed/never happens
if (word >= 64)
goto fail;
desc.endian_bytes = word;
}
// We always use bit offsets; this doesn't lose any information,
// and pixdesc is merely more redundant.
offset += shift;
if (offset < 0 || offset >= (1 << 6))
goto fail;
if (offset + d->depth > plane_bits)
goto fail;
if (d->depth < 0 || d->depth >= (1 << 6))
goto fail;
desc.comps[c] = (struct mp_imgfmt_comp_desc){
.plane = d->plane,
.offset = offset,
.size = d->depth,
};
}
for (int p = 0; p < num_planes; p++) {
if (!desc.bits[p])
goto fail; // plane doesn't exist
}
// What the fuck: this is probably a pixdesc bug, so fix it.
if (fmt == AV_PIX_FMT_RGB8) {
desc.comps[2] = (struct mp_imgfmt_comp_desc){0, 0, 2};
desc.comps[1] = (struct mp_imgfmt_comp_desc){0, 2, 3};
desc.comps[0] = (struct mp_imgfmt_comp_desc){0, 5, 3};
}
// Overlap test. If any shared bits are happening, this is not a format we
// can represent (or it's something like Bayer: components in the same bits,
// but different alternating lines).
bool any_shared_bits = false;
bool any_shared_bytes = false;
for (int c = 0; c < pd->nb_components; c++) {
for (int i = 0; i < c; i++) {
struct mp_imgfmt_comp_desc *c1 = &desc.comps[c];
struct mp_imgfmt_comp_desc *c2 = &desc.comps[i];
if (c1->plane == c2->plane) {
if (c1->offset + c1->size > c2->offset &&
c2->offset + c2->size > c1->offset)
any_shared_bits = true;
if ((c1->offset + c1->size + 7) / 8u > c2->offset / 8u &&
(c2->offset + c2->size + 7) / 8u > c1->offset / 8u)
any_shared_bytes = true;
}
}
}
if (any_shared_bits) {
for (int c = 0; c < pd->nb_components; c++)
desc.comps[c] = (struct mp_imgfmt_comp_desc){0};
}
// Many important formats have padding within an access word. For example
// yuv420p10 has the upper 6 bit cleared to 0; P010 has the lower 6 bits
// cleared to 0. Pixdesc cannot represent that these bits are 0. There are
// other formats where padding is not guaranteed to be 0, but they are
// described in the same way.
// Apply a heuristic that is supposed to identify formats which use
// guaranteed 0 padding. This could fail, but nobody said this pixdesc crap
// is robust.
for (int c = 0; c < pd->nb_components; c++) {
struct mp_imgfmt_comp_desc *cd = &desc.comps[c];
// Note: rgb444 would defeat our heuristic if we checked only per comp.
// also, exclude "bitstream" formats due to monow/monob
int fsize = MP_ALIGN_UP(cd->size, 8);
if (!any_shared_bytes && el_bits == 8 && fsize != cd->size &&
fsize - cd->size <= (1 << 3))
{
if (!(cd->offset % 8u)) {
cd->pad = -(fsize - cd->size);
cd->size = fsize;
} else if (!((cd->offset + cd->size) % 8u)) {
cd->pad = fsize - cd->size;
cd->size = fsize;
cd->offset = MP_ALIGN_DOWN(cd->offset, 8);
}
}
}
if (is_packed_ss_yuv) {
if (num_planes > 1)
goto fail;
// Guess at which positions the additional luma samples are. We iterate
// starting with the first byte, and then put a luma sample at places
// not covered by other luma/chroma.
// Pixdesc does not and can not provide this information. This heuristic
// may fail in certain cases. What a load of bullshit, right?
int lsize = desc.comps[0].size;
int cur_offset = 0;
for (int lsample = 1; lsample < (1 << pd->log2_chroma_w); lsample++) {
while (1) {
if (cur_offset + lsize > desc.bits[0])
goto fail;
bool free = true;
for (int c = 0; c < pd->nb_components; c++) {
struct mp_imgfmt_comp_desc *cd = &desc.comps[c];
if (!cd->size)
continue;
if (cd->offset + cd->size > cur_offset &&
cur_offset + lsize > cd->offset)
{
free = false;
break;
}
}
if (free)
break;
cur_offset += lsize;
}
desc.extra_luma_offsets[lsample - 1] = cur_offset;
cur_offset += lsize;
}
}
// The alpha component always has ID 4 (index 3) in our representation, so
// move the alpha component to there.
if (has_alpha && pd->nb_components < 4) {
desc.comps[3] = desc.comps[pd->nb_components - 1];
desc.comps[pd->nb_components - 1] = (struct mp_imgfmt_comp_desc){0};
}
*p_desc = desc;
return;
fail:
*p_desc = (struct mp_imgfmt_layout){{0}};
// Average bit size fallback.
int num_av_planes = av_pix_fmt_count_planes(fmt);
for (int p = 0; p < num_av_planes; p++) {
int ls = av_image_get_linesize(fmt, 256, p);
if (ls > 0)
p_desc->bits[p] = ls * 8 / 256;
}
}
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)
return (struct mp_imgfmt_desc) {0};
bool 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,
};
for (int c = 0; c < pd->nb_components; c++)
desc.num_planes = MPMAX(desc.num_planes, pd->comp[c].plane + 1);
struct mp_imgfmt_layout layout;
mp_imgfmt_get_layout(mpfmt, &layout);
bool is_ba = desc.num_planes > 0;
for (int p = 0; p < desc.num_planes; p++) {
desc.bpp[p] = layout.bits[p] / (layout.extra_w + 1);
is_ba = !(desc.bpp[p] % 8u);
}
if (is_ba)
desc.flags |= MP_IMGFLAG_BYTE_ALIGNED;
// Very heuristical.
bool is_be = layout.endian_bytes > 0;
bool need_endian = (layout.comps[0].size % 8u && layout.bits[0] > 8) ||
layout.comps[0].size > 8;
if (need_endian) {
desc.flags |= is_be ? MP_IMGFLAG_BE : MP_IMGFLAG_LE;
} else {
desc.flags |= MP_IMGFLAG_LE | MP_IMGFLAG_BE;
}
enum mp_csp csp = mp_imgfmt_get_forced_csp(mpfmt);
if ((pd->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
desc.flags |= MP_IMGFLAG_HWACCEL;
} else if (csp == MP_CSP_XYZ) {
/* nothing */
} else if (csp == MP_CSP_RGB) {
desc.flags |= MP_IMGFLAG_RGB;
} else {
desc.flags |= MP_IMGFLAG_YUV;
}
if (pd->flags & AV_PIX_FMT_FLAG_ALPHA)
desc.flags |= MP_IMGFLAG_ALPHA;
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)
&& is_uint)
{
bool same_depth = true;
for (int p = 0; p < desc.num_planes; p++) {
same_depth &= layout.bits[p] == layout.bits[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 &&
desc.bpp[1] == desc.bpp[0] * 2 &&
(desc.flags & MP_IMGFLAG_YUV))
{
desc.flags |= MP_IMGFLAG_YUV_NV;
}
}
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] * (layout.extra_w + 1) % 8) != 0)
desc.align_x = 8 / desc.bpp[0]; // expect power of 2
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);
if (pixdesc && (pixdesc->flags & AV_PIX_FMT_FLAG_HWACCEL))
return MP_CSP_AUTO;
// 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 ||
pixfmt == AV_PIX_FMT_MONOWHITE)
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)));
}
bool mp_get_regular_imgfmt(struct mp_regular_imgfmt *dst, int imgfmt)
{
const struct mp_imgfmt_entry *p = get_mp_desc(imgfmt);
if (p && p->reg_desc.component_size) {
*dst = p->reg_desc;
return true;
}
struct mp_regular_imgfmt res = {0};
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(imgfmt);
if (!desc.num_planes)
return false;
res.num_planes = desc.num_planes;
struct mp_imgfmt_layout layout;
mp_imgfmt_get_layout(imgfmt, &layout);
if (layout.endian_bytes || layout.extra_w)
return false;
res.component_type = mp_imgfmt_get_component_type(imgfmt);
if (!res.component_type)
return false;
struct mp_imgfmt_comp_desc *comp0 = &layout.comps[0];
if (comp0->size < 1 || comp0->size > 64 || (comp0->size % 8u))
return false;
res.component_size = comp0->size / 8u;
res.component_pad = comp0->pad;
for (int n = 0; n < res.num_planes; n++) {
if (layout.bits[n] % comp0->size)
return false;
res.planes[n].num_components = layout.bits[n] / comp0->size;
}
for (int n = 0; n < MP_NUM_COMPONENTS; n++) {
struct mp_imgfmt_comp_desc *comp = &layout.comps[n];
if (!comp->size)
continue;
struct mp_regular_imgfmt_plane *plane = &res.planes[comp->plane];
res.num_planes = MPMAX(res.num_planes, comp->plane + 1);
// We support uniform depth only.
if (comp->size != comp0->size || comp->pad != comp0->pad)
return false;
// Size-aligned only.
int pos = comp->offset / comp->size;
if (comp->offset != pos * comp->size || pos >= MP_NUM_COMPONENTS)
return false;
if (plane->components[pos])
return false;
plane->components[pos] = n + 1;
}
res.chroma_xs = desc.chroma_xs;
res.chroma_ys = desc.chroma_ys;
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;
}
// 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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