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mpv/video/zimg.c

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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 <math.h>
#include "common/common.h"
#include "common/msg.h"
#include "csputils.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include "video/img_format.h"
#include "zimg.h"
static_assert(MP_IMAGE_BYTE_ALIGN >= ZIMG_ALIGN, "");
static const struct m_opt_choice_alternatives mp_zimg_scalers[] = {
{"point", ZIMG_RESIZE_POINT},
{"bilinear", ZIMG_RESIZE_BILINEAR},
{"bicubic", ZIMG_RESIZE_BICUBIC},
{"spline16", ZIMG_RESIZE_SPLINE16},
{"spline36", ZIMG_RESIZE_SPLINE36},
{"lanczos", ZIMG_RESIZE_LANCZOS},
{0}
};
#define OPT_PARAM(name, var, flags) \
OPT_DOUBLE(name, var, (flags) | M_OPT_DEFAULT_NAN)
#define OPT_BASE_STRUCT struct zimg_opts
const struct m_sub_options zimg_conf = {
.opts = (struct m_option[]) {
OPT_CHOICE_C("scaler", scaler, 0, mp_zimg_scalers),
OPT_PARAM("scaler-param-a", scaler_params[0], 0),
OPT_PARAM("scaler-param-b", scaler_params[1], 0),
OPT_CHOICE_C("scaler-chroma", scaler_chroma, 0, mp_zimg_scalers),
OPT_PARAM("scaler-chroma-param-a", scaler_chroma_params[0], 0),
OPT_PARAM("scaler-chroma-param-b", scaler_chroma_params[1], 0),
OPT_CHOICE("dither", dither, 0,
({"no", ZIMG_DITHER_NONE},
{"ordered", ZIMG_DITHER_ORDERED},
{"random", ZIMG_DITHER_RANDOM},
{"error-diffusion", ZIMG_DITHER_ERROR_DIFFUSION})),
OPT_FLAG("fast", fast, 0),
{0}
},
.size = sizeof(struct zimg_opts),
.defaults = &(const struct zimg_opts){
.scaler = ZIMG_RESIZE_LANCZOS,
.scaler_params = {NAN, NAN},
.scaler_chroma_params = {NAN, NAN},
.scaler_chroma = ZIMG_RESIZE_BILINEAR,
.dither = ZIMG_DITHER_RANDOM,
.fast = 1,
},
};
struct mp_zimg_repack {
bool pack; // if false, this is for unpacking
struct mp_image_params fmt; // original mp format (possibly packed format)
int zimgfmt; // zimg equivalent unpacked format
int zplanes; // number of planes (zimgfmt)
unsigned zmask[4]; // zmask[n] = zimg_image_buffer.plane[n].mask
int z_planes[4]; // z_planes[zimg_index] = mp_index
bool pass_through_y; // luma plane optimization for e.g. nv12
// If set, the pack/unpack callback to pass to zimg.
// Called with user==mp_zimg_repack.
zimg_filter_graph_callback repack;
// For packed_repack.
int components[4]; // p2[n] = mp_image.planes[components[n]]
// pack: p1 is dst, p2 is src
// unpack: p1 is src, p2 is dst
void (*packed_repack_scanline)(void *p1, void *p2[], int x0, int x1);
// Temporary memory for slice-wise repacking. This may be set even if repack
// is not set (then it may be used to avoid alignment issues). This has
// about one slice worth of data.
struct mp_image *tmp;
// Temporary, per-call source/target frame. (Regrettably a mutable field,
// but it's not the only one, and makes the callbacks much less of a mess
// by avoiding another "closure" indirection.)
// To be used by the repack callback.
struct mp_image *mpi;
// Also temporary, per-call. use_buf[n] == plane n uses tmp (and not mpi).
bool use_buf[4];
};
static void mp_zimg_update_from_cmdline(struct mp_zimg_context *ctx)
{
m_config_cache_update(ctx->opts_cache);
struct zimg_opts *opts = ctx->opts_cache->opts;
ctx->opts = *opts;
}
static zimg_chroma_location_e mp_to_z_chroma(enum mp_chroma_location cl)
{
switch (cl) {
case MP_CHROMA_LEFT: return ZIMG_CHROMA_LEFT;
case MP_CHROMA_CENTER: return ZIMG_CHROMA_CENTER;
default: return ZIMG_CHROMA_LEFT;
}
}
static zimg_matrix_coefficients_e mp_to_z_matrix(enum mp_csp csp)
{
switch (csp) {
case MP_CSP_BT_601: return ZIMG_MATRIX_BT470_BG;
case MP_CSP_BT_709: return ZIMG_MATRIX_BT709;
case MP_CSP_SMPTE_240M: return ZIMG_MATRIX_ST240_M;
case MP_CSP_BT_2020_NC: return ZIMG_MATRIX_BT2020_NCL;
case MP_CSP_BT_2020_C: return ZIMG_MATRIX_BT2020_CL;
case MP_CSP_RGB: return ZIMG_MATRIX_RGB;
case MP_CSP_XYZ: return ZIMG_MATRIX_RGB;
case MP_CSP_YCGCO: return ZIMG_MATRIX_YCGCO;
default: return ZIMG_MATRIX_BT709;
}
}
static zimg_transfer_characteristics_e mp_to_z_trc(enum mp_csp_trc trc)
{
switch (trc) {
case MP_CSP_TRC_BT_1886: return ZIMG_TRANSFER_BT709;
case MP_CSP_TRC_SRGB: return ZIMG_TRANSFER_IEC_61966_2_1;
case MP_CSP_TRC_LINEAR: return ZIMG_TRANSFER_LINEAR;
case MP_CSP_TRC_GAMMA22: return ZIMG_TRANSFER_BT470_M;
case MP_CSP_TRC_GAMMA28: return ZIMG_TRANSFER_BT470_BG;
case MP_CSP_TRC_PQ: return ZIMG_TRANSFER_ST2084;
case MP_CSP_TRC_HLG: return ZIMG_TRANSFER_ARIB_B67;
case MP_CSP_TRC_GAMMA18: // ?
case MP_CSP_TRC_GAMMA20:
case MP_CSP_TRC_GAMMA24:
case MP_CSP_TRC_GAMMA26:
case MP_CSP_TRC_PRO_PHOTO:
case MP_CSP_TRC_V_LOG:
case MP_CSP_TRC_S_LOG1:
case MP_CSP_TRC_S_LOG2: // ?
default: return ZIMG_TRANSFER_BT709;
}
}
static zimg_color_primaries_e mp_to_z_prim(enum mp_csp_prim prim)
{
switch (prim) {
case MP_CSP_PRIM_BT_601_525:return ZIMG_PRIMARIES_ST170_M;
case MP_CSP_PRIM_BT_601_625:return ZIMG_PRIMARIES_BT470_BG;
case MP_CSP_PRIM_BT_709: return ZIMG_PRIMARIES_BT709;
case MP_CSP_PRIM_BT_2020: return ZIMG_PRIMARIES_BT2020;
case MP_CSP_PRIM_BT_470M: return ZIMG_PRIMARIES_BT470_M;
case MP_CSP_PRIM_CIE_1931: return ZIMG_PRIMARIES_ST428;
case MP_CSP_PRIM_DCI_P3: return ZIMG_PRIMARIES_ST431_2;
case MP_CSP_PRIM_DISPLAY_P3:return ZIMG_PRIMARIES_ST432_1;
case MP_CSP_PRIM_APPLE: // ?
case MP_CSP_PRIM_ADOBE:
case MP_CSP_PRIM_PRO_PHOTO:
case MP_CSP_PRIM_V_GAMUT:
case MP_CSP_PRIM_S_GAMUT: // ?
default: return ZIMG_PRIMARIES_BT709;
}
}
static void destroy_zimg(struct mp_zimg_context *ctx)
{
free(ctx->zimg_tmp);
ctx->zimg_tmp = NULL;
zimg_filter_graph_free(ctx->zimg_graph);
ctx->zimg_graph = NULL;
TA_FREEP(&ctx->zimg_src);
TA_FREEP(&ctx->zimg_dst);
}
static void free_mp_zimg(void *p)
{
struct mp_zimg_context *ctx = p;
destroy_zimg(ctx);
}
struct mp_zimg_context *mp_zimg_alloc(void)
{
struct mp_zimg_context *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (struct mp_zimg_context) {
.log = mp_null_log,
};
ctx->opts = *(struct zimg_opts *)zimg_conf.defaults;
talloc_set_destructor(ctx, free_mp_zimg);
return ctx;
}
void mp_zimg_enable_cmdline_opts(struct mp_zimg_context *ctx,
struct mpv_global *g)
{
if (ctx->opts_cache)
return;
ctx->opts_cache = m_config_cache_alloc(ctx, g, &zimg_conf);
destroy_zimg(ctx); // force update
mp_zimg_update_from_cmdline(ctx); // first update
}
static int repack_align(void *user, unsigned i, unsigned x0, unsigned x1)
{
struct mp_zimg_repack *r = user;
for (int p = 0; p < r->mpi->fmt.num_planes; p++) {
if (!r->use_buf[p])
continue;
int bpp = r->mpi->fmt.bytes[p];
int xs = r->mpi->fmt.xs[p];
int ys = r->mpi->fmt.ys[p];
// Number of lines on this plane.
int h = (1 << r->mpi->fmt.chroma_ys) - (1 << ys) + 1;
for (int y = i; y < i + h; y++) {
void *a = r->mpi->planes[p] +
r->mpi->stride[p] * (ptrdiff_t)(y >> ys) +
bpp * (x0 >> xs);
void *b = r->tmp->planes[p] +
r->tmp->stride[p] * (ptrdiff_t)((y >> ys) & r->zmask[p]) +
bpp * (x0 >> xs);
size_t size = ((x1 - x0) >> xs) * bpp;
if (r->pack) {
memcpy(a, b, size);
} else {
memcpy(b, a, size);
}
}
}
return 0;
}
// PA = PAck, copy planar input to single packed array
// UN = UNpack, copy packed input to planar output
// Naming convention:
// pa_/un_ prefix to identify conversion direction.
// Left (LSB, lowest byte address) -> Right (MSB, highest byte address).
// (This is unusual; MSG to LSB is more commonly used to describe formats,
// but our convention makes more sense for byte access in little endian.)
// "c" identifies a color component.
// "z" identifies known zero padding.
// "o" identifies opaque alpha (unused/unsupported yet).
// "x" identifies uninitialized padding.
// A component is followed by its size in bits.
// Size can be omitted for multiple uniform components (c8c8c8 == ccc8).
// Unpackers will often use "x" for padding, because they ignore it, while
// packets will use "z" because they write zero.
#define PA_WORD_3(name, packed_t, plane_t, sh_c0, sh_c1, sh_c2, pad) \
static void name(void *dst, void *src[], int x0, int x1) { \
for (int x = x0; x < x1; x++) { \
((packed_t *)dst)[x] = (pad) | \
((packed_t)((plane_t *)src[0])[x] << (sh_c0)) | \
((packed_t)((plane_t *)src[1])[x] << (sh_c1)) | \
((packed_t)((plane_t *)src[2])[x] << (sh_c2)); \
} \
}
#define UN_WORD_3(name, packed_t, plane_t, sh_c0, sh_c1, sh_c2, mask) \
static void name(void *src, void *dst[], int x0, int x1) { \
for (int x = x0; x < x1; x++) { \
packed_t c = ((packed_t *)src)[x]; \
((plane_t *)dst[0])[x] = (c >> (sh_c0)) & (mask); \
((plane_t *)dst[1])[x] = (c >> (sh_c1)) & (mask); \
((plane_t *)dst[2])[x] = (c >> (sh_c2)) & (mask); \
} \
}
UN_WORD_3(un_ccc8x8, uint32_t, uint8_t, 0, 8, 16, 0xFFu)
PA_WORD_3(pa_ccc8z8, uint32_t, uint8_t, 0, 8, 16, 0)
UN_WORD_3(un_x8ccc8, uint32_t, uint8_t, 8, 16, 24, 0xFFu)
PA_WORD_3(pa_z8ccc8, uint32_t, uint8_t, 8, 16, 24, 0)
UN_WORD_3(un_ccc10x2, uint32_t, uint16_t, 0, 10, 20, 0x3FFu)
PA_WORD_3(pa_ccc10z2, uint32_t, uint16_t, 20, 10, 0, 0)
#define PA_WORD_2(name, packed_t, plane_t, sh_c0, sh_c1, pad) \
static void name(void *dst, void *src[], int x0, int x1) { \
for (int x = x0; x < x1; x++) { \
((packed_t *)dst)[x] = (pad) | \
((packed_t)((plane_t *)src[0])[x] << (sh_c0)) | \
((packed_t)((plane_t *)src[1])[x] << (sh_c1)); \
} \
}
#define UN_WORD_2(name, packed_t, plane_t, sh_c0, sh_c1, mask) \
static void name(void *src, void *dst[], int x0, int x1) { \
for (int x = x0; x < x1; x++) { \
packed_t c = ((packed_t *)src)[x]; \
((plane_t *)dst[0])[x] = (c >> (sh_c0)) & (mask); \
((plane_t *)dst[1])[x] = (c >> (sh_c1)) & (mask); \
} \
}
UN_WORD_2(un_cc8, uint16_t, uint8_t, 0, 8, 0xFFu)
PA_WORD_2(pa_cc8, uint16_t, uint8_t, 0, 8, 0)
UN_WORD_2(un_cc16, uint32_t, uint16_t, 0, 16, 0xFFFFu)
PA_WORD_2(pa_cc16, uint32_t, uint16_t, 0, 16, 0)
#define PA_SEQ_3(name, comp_t) \
static void name(void *dst, void *src[], int x0, int x1) { \
comp_t *r = dst; \
for (int x = x0; x < x1; x++) { \
*r++ = ((comp_t *)src[0])[x]; \
*r++ = ((comp_t *)src[1])[x]; \
*r++ = ((comp_t *)src[2])[x]; \
} \
}
#define UN_SEQ_3(name, comp_t) \
static void name(void *src, void *dst[], int x0, int x1) { \
comp_t *r = src; \
for (int x = x0; x < x1; x++) { \
((comp_t *)dst[0])[x] = *r++; \
((comp_t *)dst[1])[x] = *r++; \
((comp_t *)dst[2])[x] = *r++; \
} \
}
UN_SEQ_3(un_ccc8, uint8_t)
PA_SEQ_3(pa_ccc8, uint8_t)
UN_SEQ_3(un_ccc16, uint16_t)
PA_SEQ_3(pa_ccc16, uint16_t)
// "regular": single packed plane, all components have same width (except padding)
struct regular_repacker {
int packed_width; // number of bits of the packed pixel
int component_width; // number of bits for a single component
int prepadding; // number of bits of LSB padding
int num_components; // number of components that can be accessed
void (*pa_scanline)(void *p1, void *p2[], int x0, int x1);
void (*un_scanline)(void *p1, void *p2[], int x0, int x1);
};
static const struct regular_repacker regular_repackers[] = {
{32, 8, 0, 3, pa_ccc8z8, un_ccc8x8},
{32, 8, 8, 3, pa_z8ccc8, un_x8ccc8},
{24, 8, 0, 3, pa_ccc8, un_ccc8},
{48, 16, 0, 3, pa_ccc16, un_ccc16},
{16, 8, 0, 2, pa_cc8, un_cc8},
{32, 16, 0, 2, pa_cc16, un_cc16},
{32, 10, 0, 3, pa_ccc10z2, un_ccc10x2},
};
static int packed_repack(void *user, unsigned i, unsigned x0, unsigned x1)
{
struct mp_zimg_repack *r = user;
uint32_t *p1 =
(void *)(r->mpi->planes[0] + r->mpi->stride[0] * (ptrdiff_t)i);
void *p2[3];
for (int p = 0; p < 3; p++) {
int s = r->components[p];
p2[p] = r->tmp->planes[s] +
r->tmp->stride[s] * (ptrdiff_t)(i & r->zmask[s]);
}
r->packed_repack_scanline(p1, p2, x0, x1);
return 0;
}
static int repack_nv(void *user, unsigned i, unsigned x0, unsigned x1)
{
struct mp_zimg_repack *r = user;
int xs = r->mpi->fmt.chroma_xs;
int ys = r->mpi->fmt.chroma_ys;
if (r->use_buf[0]) {
// Copy Y.
int l_h = 1 << ys;
for (int y = i; y < i + l_h; y++) {
ptrdiff_t bpp = r->mpi->fmt.bytes[0];
void *a = r->mpi->planes[0] +
r->mpi->stride[0] * (ptrdiff_t)y + bpp * x0;
void *b = r->tmp->planes[0] +
r->tmp->stride[0] * (ptrdiff_t)(y & r->zmask[0]) + bpp * x0;
size_t size = (x1 - x0) * bpp;
if (r->pack) {
memcpy(a, b, size);
} else {
memcpy(b, a, size);
}
}
}
uint32_t *p1 =
(void *)(r->mpi->planes[1] + r->mpi->stride[1] * (ptrdiff_t)(i >> ys));
void *p2[2];
for (int p = 0; p < 2; p++) {
int s = r->components[p];
p2[p] = r->tmp->planes[s] +
r->tmp->stride[s] * (ptrdiff_t)((i >> ys) & r->zmask[s]);
}
r->packed_repack_scanline(p1, p2, x0 >> xs, x1 >> xs);
return 0;
}
static void wrap_buffer(struct mp_zimg_repack *r,
zimg_image_buffer *buf,
zimg_filter_graph_callback *cb,
struct mp_image *mpi)
{
*buf = (zimg_image_buffer){ZIMG_API_VERSION};
bool plane_aligned[4] = {0};
for (int n = 0; n < r->zplanes; n++) {
plane_aligned[n] = !((uintptr_t)mpi->planes[n] % ZIMG_ALIGN) &&
!(mpi->stride[n] % ZIMG_ALIGN);
}
for (int n = 0; n < r->zplanes; n++) {
int mplane = r->z_planes[n];
r->use_buf[mplane] = !plane_aligned[n];
if (!(r->pass_through_y && mplane == 0))
r->use_buf[mplane] |= !!r->repack;
struct mp_image *tmpi = r->use_buf[mplane] ? r->tmp : mpi;
buf->plane[n].data = tmpi->planes[mplane];
buf->plane[n].stride = tmpi->stride[mplane];
buf->plane[n].mask = r->use_buf[mplane] ? r->zmask[n] : ZIMG_BUFFER_MAX;
}
*cb = r->repack ? r->repack : repack_align;
r->mpi = mpi;
}
static void setup_nv_packer(struct mp_zimg_repack *r)
{
struct mp_regular_imgfmt desc;
if (!mp_get_regular_imgfmt(&desc, r->zimgfmt))
return;
// Check for NV.
if (desc.num_planes != 2)
return;
if (desc.planes[0].num_components != 1 || desc.planes[0].components[0] != 1)
return;
if (desc.planes[1].num_components != 2)
return;
int cr0 = desc.planes[1].components[0];
int cr1 = desc.planes[1].components[1];
if (cr0 > cr1)
MPSWAP(int, cr0, cr1);
if (cr0 != 2 || cr1 != 3)
return;
// Construct equivalent planar format.
struct mp_regular_imgfmt desc2 = desc;
desc2.num_planes = 3;
desc2.planes[1].num_components = 1;
desc2.planes[1].components[0] = 2;
desc2.planes[2].num_components = 1;
desc2.planes[2].components[0] = 3;
// For P010. Strangely this concept exists only for the NV format.
if (desc2.component_pad > 0)
desc2.component_pad = 0;
int planar_fmt = mp_find_regular_imgfmt(&desc2);
if (!planar_fmt)
return;
for (int i = 0; i < MP_ARRAY_SIZE(regular_repackers); i++) {
const struct regular_repacker *pa = &regular_repackers[i];
void (*repack_cb)(void *p1, void *p2[], int x0, int x1) =
r->pack ? pa->pa_scanline : pa->un_scanline;
if (pa->packed_width != desc.component_size * 2 * 8 ||
pa->component_width != desc.component_size * 8 ||
pa->num_components != 2 ||
pa->prepadding != 0 ||
!repack_cb)
continue;
r->repack = repack_nv;
r->pass_through_y = true;
r->packed_repack_scanline = repack_cb;
r->zimgfmt = planar_fmt;
r->components[0] = desc.planes[1].components[0] - 1;
r->components[1] = desc.planes[1].components[1] - 1;
return;
}
}
static void setup_misc_packer(struct mp_zimg_repack *r)
{
// Although it's in regular_repackers[], the generic mpv imgfmt metadata
// can't handle it yet.
if (r->zimgfmt == IMGFMT_RGB30) {
struct mp_regular_imgfmt planar10 = {
.component_type = MP_COMPONENT_TYPE_UINT,
.component_size = 2,
.component_pad = -6,
.num_planes = 3,
.planes = {
{1, {1}},
{1, {2}},
{1, {3}},
},
.chroma_w = 1,
.chroma_h = 1,
};
int planar_fmt = mp_find_regular_imgfmt(&planar10);
if (!planar_fmt)
return;
r->zimgfmt = planar_fmt;
r->repack = packed_repack;
r->packed_repack_scanline = r->pack ? pa_ccc10z2 : un_ccc10x2;
static int c_order[] = {3, 2, 1};
for (int n = 0; n < 3; n++)
r->components[n] = c_order[n] - 1;
}
}
// Tries to set a packer/unpacker for component-wise byte aligned RGB formats.
static void setup_regular_rgb_packer(struct mp_zimg_repack *r)
{
struct mp_regular_imgfmt desc;
if (!mp_get_regular_imgfmt(&desc, r->zimgfmt))
return;
if (desc.num_planes != 1 || desc.planes[0].num_components < 3)
return;
struct mp_regular_imgfmt_plane *p = &desc.planes[0];
for (int n = 0; n < p->num_components; n++) {
if (p->components[n] >= 4) // no alpha
return;
}
// padding must be in MSB or LSB
if (p->components[0] && p->components[3])
return;
int depth = desc.component_size * 8 + MPMIN(0, desc.component_pad);
// Find a physically compatible planar format (typically IMGFMT_420P).
struct mp_regular_imgfmt desc2 = desc;
desc2.forced_csp = 0;
if (desc2.component_pad > 0)
desc2.component_pad = 0;
desc2.num_planes = 3;
for (int n = 0; n < desc2.num_planes; n++) {
desc2.planes[n].num_components = 1;
desc2.planes[n].components[0] = n + 1;
}
int planar_fmt = mp_find_regular_imgfmt(&desc2);
if (!planar_fmt)
return;
for (int i = 0; i < MP_ARRAY_SIZE(regular_repackers); i++) {
const struct regular_repacker *pa = &regular_repackers[i];
// The following may assume little endian (because some repack backends
// use word access, while the metadata here uses byte access).
int prepad = p->components[0] ? 0 : 8;
int first_comp = p->components[0] ? 0 : 1;
void (*repack_cb)(void *p1, void *p2[], int x0, int x1) =
r->pack ? pa->pa_scanline : pa->un_scanline;
if (pa->packed_width != desc.component_size * p->num_components * 8 ||
pa->component_width != depth ||
pa->num_components != 3 ||
pa->prepadding != prepad ||
!repack_cb)
continue;
r->repack = packed_repack;
r->packed_repack_scanline = repack_cb;
r->zimgfmt = planar_fmt;
for (int n = 0; n < 3; n++)
r->components[n] = p->components[first_comp + n] - 1;
return;
}
}
// (ctx can be NULL for the sake of probing.)
static bool setup_format(zimg_image_format *zfmt, struct mp_zimg_repack *r,
struct mp_zimg_context *ctx)
{
zimg_image_format_default(zfmt, ZIMG_API_VERSION);
struct mp_image_params fmt = r->fmt;
mp_image_params_guess_csp(&fmt);
r->zimgfmt = fmt.imgfmt;
if (!r->repack)
setup_nv_packer(r);
if (!r->repack)
setup_misc_packer(r);
if (!r->repack)
setup_regular_rgb_packer(r);
struct mp_regular_imgfmt desc;
if (!mp_get_regular_imgfmt(&desc, r->zimgfmt))
return false;
// no alpha plane, no odd chroma subsampling
if (desc.num_planes > 3 || !MP_IS_POWER_OF_2(desc.chroma_w) ||
!MP_IS_POWER_OF_2(desc.chroma_h))
return false;
// Accept only true planar formats.
for (int n = 0; n < desc.num_planes; n++) {
if (desc.planes[n].num_components != 1)
return false;
int c = desc.planes[n].components[0];
if (c < 1 || c > 3)
return false;
// Unfortunately, ffmpeg prefers GBR order for planar RGB, while zimg
// is sane. This makes it necessary to determine and fix the order.
r->z_planes[c - 1] = n;
}
r->zplanes = desc.num_planes;
// Note: formats with subsampled chroma may have odd width or height in mpv
// and FFmpeg. This is because the width/height is actually a cropping
// rectangle. Reconstruct the image allocation size and set the cropping.
zfmt->width = MP_ALIGN_UP(fmt.w, desc.chroma_w);
zfmt->height = MP_ALIGN_UP(fmt.h, desc.chroma_h);
if (zfmt->width != fmt.w)
zfmt->active_region.width = fmt.w;
if (zfmt->height != fmt.h)
zfmt->active_region.height = fmt.h;
zfmt->subsample_w = mp_log2(desc.chroma_w);
zfmt->subsample_h = mp_log2(desc.chroma_h);
zfmt->color_family = ZIMG_COLOR_YUV;
if (desc.num_planes == 1) {
zfmt->color_family = ZIMG_COLOR_GREY;
} else if (fmt.color.space == MP_CSP_RGB || fmt.color.space == MP_CSP_XYZ) {
zfmt->color_family = ZIMG_COLOR_RGB;
}
if (desc.component_type == MP_COMPONENT_TYPE_UINT &&
desc.component_size == 1)
{
zfmt->pixel_type = ZIMG_PIXEL_BYTE;
} else if (desc.component_type == MP_COMPONENT_TYPE_UINT &&
desc.component_size == 2)
{
zfmt->pixel_type = ZIMG_PIXEL_WORD;
} else if (desc.component_type == MP_COMPONENT_TYPE_FLOAT &&
desc.component_size == 2)
{
zfmt->pixel_type = ZIMG_PIXEL_HALF;
} else if (desc.component_type == MP_COMPONENT_TYPE_FLOAT &&
desc.component_size == 4)
{
zfmt->pixel_type = ZIMG_PIXEL_FLOAT;
} else {
return false;
}
// (Formats like P010 are basically reported as P016.)
zfmt->depth = desc.component_size * 8 + MPMIN(0, desc.component_pad);
zfmt->pixel_range = fmt.color.levels == MP_CSP_LEVELS_PC ?
ZIMG_RANGE_FULL : ZIMG_RANGE_LIMITED;
zfmt->matrix_coefficients = mp_to_z_matrix(fmt.color.space);
zfmt->transfer_characteristics = mp_to_z_trc(fmt.color.gamma);
zfmt->color_primaries = mp_to_z_prim(fmt.color.primaries);
zfmt->chroma_location = mp_to_z_chroma(fmt.chroma_location);
if (ctx && ctx->opts.fast) {
// mpv's default for RGB output slows down zimg significantly.
if (zfmt->transfer_characteristics == ZIMG_TRANSFER_IEC_61966_2_1 &&
zfmt->color_family == ZIMG_COLOR_RGB)
zfmt->transfer_characteristics = ZIMG_TRANSFER_BT709;
}
return true;
}
static bool allocate_buffer(struct mp_zimg_context *ctx,
struct mp_zimg_repack *r)
{
unsigned lines = 0;
int err;
if (r->pack) {
err = zimg_filter_graph_get_output_buffering(ctx->zimg_graph, &lines);
} else {
err = zimg_filter_graph_get_input_buffering(ctx->zimg_graph, &lines);
}
if (err)
return false;
r->zmask[0] = zimg_select_buffer_mask(lines);
// Either ZIMG_BUFFER_MAX, or a power-of-2 slice buffer.
assert(r->zmask[0] == ZIMG_BUFFER_MAX || MP_IS_POWER_OF_2(r->zmask[0] + 1));
int h = r->zmask[0] == ZIMG_BUFFER_MAX ? r->fmt.h : r->zmask[0] + 1;
if (h >= r->fmt.h) {
h = r->fmt.h;
r->zmask[0] = ZIMG_BUFFER_MAX;
}
r->tmp = mp_image_alloc(r->zimgfmt, r->fmt.w, h);
talloc_steal(r, r->tmp);
if (r->tmp) {
for (int n = 1; n < r->tmp->fmt.num_planes; n++) {
r->zmask[n] = r->zmask[0];
if (r->zmask[0] != ZIMG_BUFFER_MAX)
r->zmask[n] = r->zmask[n] >> r->tmp->fmt.ys[n];
}
}
return !!r->tmp;
}
bool mp_zimg_config(struct mp_zimg_context *ctx)
{
struct zimg_opts *opts = &ctx->opts;
destroy_zimg(ctx);
if (ctx->opts_cache)
mp_zimg_update_from_cmdline(ctx);
ctx->zimg_src = talloc_zero(NULL, struct mp_zimg_repack);
ctx->zimg_src->pack = false;
ctx->zimg_src->fmt = ctx->src;
ctx->zimg_dst = talloc_zero(NULL, struct mp_zimg_repack);
ctx->zimg_dst->pack = true;
ctx->zimg_dst->fmt = ctx->dst;
zimg_image_format src_fmt, dst_fmt;
if (!setup_format(&src_fmt, ctx->zimg_src, ctx) ||
!setup_format(&dst_fmt, ctx->zimg_dst, ctx))
goto fail;
zimg_graph_builder_params params;
zimg_graph_builder_params_default(&params, ZIMG_API_VERSION);
params.resample_filter = opts->scaler;
params.filter_param_a = opts->scaler_params[0];
params.filter_param_b = opts->scaler_params[1];
params.resample_filter_uv = opts->scaler_chroma;
params.filter_param_a_uv = opts->scaler_chroma_params[0];
params.filter_param_b_uv = opts->scaler_chroma_params[1];
params.dither_type = opts->dither;
params.cpu_type = ZIMG_CPU_AUTO_64B;
if (opts->fast)
params.allow_approximate_gamma = 1;
if (ctx->src.color.sig_peak > 0)
params.nominal_peak_luminance = ctx->src.color.sig_peak;
ctx->zimg_graph = zimg_filter_graph_build(&src_fmt, &dst_fmt, &params);
if (!ctx->zimg_graph) {
char err[128] = {0};
zimg_get_last_error(err, sizeof(err) - 1);
MP_ERR(ctx, "zimg_filter_graph_build: %s \n", err);
goto fail;
}
size_t tmp_size;
if (!zimg_filter_graph_get_tmp_size(ctx->zimg_graph, &tmp_size)) {
tmp_size = MP_ALIGN_UP(tmp_size, ZIMG_ALIGN);
ctx->zimg_tmp = aligned_alloc(ZIMG_ALIGN, tmp_size);
}
if (!ctx->zimg_tmp)
goto fail;
if (!allocate_buffer(ctx, ctx->zimg_src) ||
!allocate_buffer(ctx, ctx->zimg_dst))
goto fail;
return true;
fail:
destroy_zimg(ctx);
return false;
}
bool mp_zimg_config_image_params(struct mp_zimg_context *ctx)
{
if (ctx->zimg_src && mp_image_params_equal(&ctx->src, &ctx->zimg_src->fmt) &&
ctx->zimg_dst && mp_image_params_equal(&ctx->dst, &ctx->zimg_dst->fmt) &&
(!ctx->opts_cache || !m_config_cache_update(ctx->opts_cache)) &&
ctx->zimg_graph)
return true;
return mp_zimg_config(ctx);
}
bool mp_zimg_convert(struct mp_zimg_context *ctx, struct mp_image *dst,
struct mp_image *src)
{
ctx->src = src->params;
ctx->dst = dst->params;
if (!mp_zimg_config_image_params(ctx)) {
MP_ERR(ctx, "zimg initialization failed.\n");
return false;
}
assert(ctx->zimg_graph);
zimg_image_buffer zsrc, zdst;
zimg_filter_graph_callback cbsrc, cbdst;
wrap_buffer(ctx->zimg_src, &zsrc, &cbsrc, src);
wrap_buffer(ctx->zimg_dst, &zdst, &cbdst, dst);
// An annoyance.
zimg_image_buffer_const zsrc_c = {ZIMG_API_VERSION};
for (int n = 0; n < 3; n++) {
zsrc_c.plane[n].data = zsrc.plane[n].data;
zsrc_c.plane[n].stride = zsrc.plane[n].stride;
zsrc_c.plane[n].mask = zsrc.plane[n].mask;
}
// (The API promises to succeed if no user callbacks fail, so no need
// to check the return value.)
zimg_filter_graph_process(ctx->zimg_graph, &zsrc_c, &zdst,
ctx->zimg_tmp,
cbsrc, ctx->zimg_src,
cbdst, ctx->zimg_dst);
ctx->zimg_src->mpi = NULL;
ctx->zimg_dst->mpi = NULL;
return true;
}
static bool supports_format(int imgfmt, bool out)
{
struct mp_zimg_repack t = {
.pack = out,
.fmt = {
.imgfmt = imgfmt,
},
};
zimg_image_format fmt;
return setup_format(&fmt, &t, NULL);
}
bool mp_zimg_supports_in_format(int imgfmt)
{
return supports_format(imgfmt, false);
}
bool mp_zimg_supports_out_format(int imgfmt)
{
return supports_format(imgfmt, true);
}
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