diff options
Diffstat (limited to '')
| -rw-r--r-- | video/zimg.c | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/video/zimg.c b/video/zimg.c new file mode 100644 index 0000000..5ff300c --- /dev/null +++ b/video/zimg.c @@ -0,0 +1,730 @@ +/* + * 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 <libavutil/cpu.h> + +#include "common/common.h" +#include "common/msg.h" +#include "csputils.h" +#include "misc/thread_pool.h" +#include "misc/thread_tools.h" +#include "options/m_config.h" +#include "options/m_option.h" +#include "repack.h" +#include "video/fmt-conversion.h" +#include "video/img_format.h" +#include "zimg.h" +#include "config.h" + +static_assert(MP_IMAGE_BYTE_ALIGN >= ZIMG_ALIGN, ""); + +#define HAVE_ZIMG_ALPHA (ZIMG_API_VERSION >= ZIMG_MAKE_API_VERSION(2, 4)) + +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} +}; + +const struct zimg_opts zimg_opts_defaults = { + .scaler = ZIMG_RESIZE_LANCZOS, + .scaler_params = {NAN, NAN}, + .scaler_chroma_params = {NAN, NAN}, + .scaler_chroma = ZIMG_RESIZE_BILINEAR, + .dither = ZIMG_DITHER_RANDOM, + .fast = true, +}; + +#define OPT_PARAM(var) OPT_DOUBLE(var), .flags = M_OPT_DEFAULT_NAN + +#define OPT_BASE_STRUCT struct zimg_opts +const struct m_sub_options zimg_conf = { + .opts = (struct m_option[]) { + {"scaler", OPT_CHOICE_C(scaler, mp_zimg_scalers)}, + {"scaler-param-a", OPT_PARAM(scaler_params[0])}, + {"scaler-param-b", OPT_PARAM(scaler_params[1])}, + {"scaler-chroma", OPT_CHOICE_C(scaler_chroma, mp_zimg_scalers)}, + {"scaler-chroma-param-a", OPT_PARAM(scaler_chroma_params[0])}, + {"scaler-chroma-param-b", OPT_PARAM(scaler_chroma_params[1])}, + {"dither", OPT_CHOICE(dither, + {"no", ZIMG_DITHER_NONE}, + {"ordered", ZIMG_DITHER_ORDERED}, + {"random", ZIMG_DITHER_RANDOM}, + {"error-diffusion", ZIMG_DITHER_ERROR_DIFFUSION})}, + {"fast", OPT_BOOL(fast)}, + {"threads", OPT_CHOICE(threads, {"auto", 0}), M_RANGE(1, 64)}, + {0} + }, + .size = sizeof(struct zimg_opts), + .defaults = &zimg_opts_defaults, +}; + +struct mp_zimg_state { + zimg_filter_graph *graph; + void *tmp; + void *tmp_alloc; + struct mp_zimg_repack *src; + struct mp_zimg_repack *dst; + int slice_y, slice_h; // y start position, height of target slice + double scale_y; + struct mp_waiter thread_waiter; +}; + +struct mp_zimg_repack { + bool pack; // if false, this is for unpacking + struct mp_image_params fmt; // original mp format (possibly packed format, + // swapped endian) + int zimgfmt; // zimg equivalent unpacked format + int num_planes; // number of planes involved + unsigned zmask[4]; // zmask[mp_index] = zimg mask (using mp index!) + int z_planes[4]; // z_planes[zimg_index] = mp_index (or -1) + + struct mp_repack *repack; // converting to/from planar + + // 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 memory for zimg buffer. + zimg_image_buffer zbuf; + struct mp_image cropped_tmp; + + int real_w, real_h; // aligned size +}; + +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_TOPLEFT: return ZIMG_CHROMA_TOP_LEFT; + 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; +#if HAVE_ZIMG_ST428 + case MP_CSP_TRC_ST428: return ZIMG_TRANSFER_ST428; +#endif + 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_DCI_P3: return ZIMG_PRIMARIES_ST431_2; + case MP_CSP_PRIM_DISPLAY_P3:return ZIMG_PRIMARIES_ST432_1; + case MP_CSP_PRIM_EBU_3213: return ZIMG_PRIMARIES_EBU3213_E; + case MP_CSP_PRIM_FILM_C: return ZIMG_PRIMARIES_FILM; + case MP_CSP_PRIM_CIE_1931: + 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: // ? + case MP_CSP_PRIM_ACES_AP0: + case MP_CSP_PRIM_ACES_AP1: + default: return ZIMG_PRIMARIES_BT709; + } +} + +static void destroy_zimg(struct mp_zimg_context *ctx) +{ + for (int n = 0; n < ctx->num_states; n++) { + struct mp_zimg_state *st = ctx->states[n]; + talloc_free(st->tmp_alloc); + zimg_filter_graph_free(st->graph); + TA_FREEP(&st->src); + TA_FREEP(&st->dst); + talloc_free(st); + } + ctx->num_states = 0; +} + +static void free_mp_zimg(void *p) +{ + struct mp_zimg_context *ctx = p; + + destroy_zimg(ctx); + TA_FREEP(&ctx->tp); +} + +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_entrypoint(void *user, unsigned i, unsigned x0, unsigned x1) +{ + struct mp_zimg_repack *r = user; + + // If reading is not aligned, just read slightly more data. + if (!r->pack) + x0 &= ~(unsigned)(mp_repack_get_align_x(r->repack) - 1); + + // mp_repack requirements and zimg guarantees. + assert(!(i & (mp_repack_get_align_y(r->repack) - 1))); + assert(!(x0 & (mp_repack_get_align_x(r->repack) - 1))); + + unsigned i_src = i & (r->pack ? r->zmask[0] : ZIMG_BUFFER_MAX); + unsigned i_dst = i & (r->pack ? ZIMG_BUFFER_MAX : r->zmask[0]); + + repack_line(r->repack, x0, i_dst, x0, i_src, x1 - x0); + + return 0; +} + +static bool wrap_buffer(struct mp_zimg_state *st, struct mp_zimg_repack *r, + struct mp_image *a_mpi) +{ + zimg_image_buffer *buf = &r->zbuf; + *buf = (zimg_image_buffer){ZIMG_API_VERSION}; + + struct mp_image *mpi = a_mpi; + if (r->pack) { + mpi = &r->cropped_tmp; + *mpi = *a_mpi; + int y1 = st->slice_y + st->slice_h; + // Due to subsampling we may assume the image to be bigger than it + // actually is (see real_h in setup_format). + if (mpi->h < y1) { + assert(y1 - mpi->h < 4); + mp_image_set_size(mpi, mpi->w, y1); + } + mp_image_crop(mpi, 0, st->slice_y, mpi->w, y1); + } + + bool direct[MP_MAX_PLANES] = {0}; + + for (int p = 0; p < mpi->num_planes; p++) { + // If alignment is good, try to avoid copy. + direct[p] = !((uintptr_t)mpi->planes[p] % ZIMG_ALIGN) && + !(mpi->stride[p] % ZIMG_ALIGN); + } + + if (!repack_config_buffers(r->repack, 0, r->pack ? mpi : r->tmp, + 0, r->pack ? r->tmp : mpi, direct)) + return false; + + for (int n = 0; n < MP_ARRAY_SIZE(buf->plane); n++) { + // Note: this is really the only place we have to care about plane + // permutation (zimg_image_buffer may have a different plane order + // than the shadow mpi like r->tmp). We never use the zimg indexes + // in other places. + int mplane = r->z_planes[n]; + if (mplane < 0) + continue; + + struct mp_image *tmpi = direct[mplane] ? mpi : r->tmp; + buf->plane[n].data = tmpi->planes[mplane]; + buf->plane[n].stride = tmpi->stride[mplane]; + buf->plane[n].mask = direct[mplane] ? ZIMG_BUFFER_MAX : r->zmask[mplane]; + } + + return true; +} + +// (ctx and st can be NULL for probing.) +static bool setup_format(zimg_image_format *zfmt, struct mp_zimg_repack *r, + bool pack, struct mp_image_params *user_fmt, + struct mp_zimg_context *ctx, + struct mp_zimg_state *st) +{ + r->fmt = *user_fmt; + r->pack = pack; + + zimg_image_format_default(zfmt, ZIMG_API_VERSION); + + int rp_flags = 0; + + // For e.g. RGB565, go to lowest depth on pack for less weird dithering. + if (r->pack) { + rp_flags |= REPACK_CREATE_ROUND_DOWN; + } else { + rp_flags |= REPACK_CREATE_EXPAND_8BIT; + } + + r->repack = mp_repack_create_planar(r->fmt.imgfmt, r->pack, rp_flags); + if (!r->repack) + return false; + + int align_x = mp_repack_get_align_x(r->repack); + + r->zimgfmt = r->pack ? mp_repack_get_format_src(r->repack) + : mp_repack_get_format_dst(r->repack); + + if (ctx) { + talloc_steal(r, r->repack); + } else { + TA_FREEP(&r->repack); + } + + struct mp_image_params fmt = r->fmt; + mp_image_params_guess_csp(&fmt); + + struct mp_regular_imgfmt desc; + if (!mp_get_regular_imgfmt(&desc, r->zimgfmt)) + return false; + + // Relies on zimg callbacks reading on 64 byte alignment. + if (!MP_IS_POWER_OF_2(align_x) || align_x > 64 / desc.component_size) + return false; + + // no weird stuff + if (desc.num_planes > 4) + return false; + + for (int n = 0; n < 4; n++) + r->z_planes[n] = -1; + + 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 > 4) + return false; + if (c < 4) { + // 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; + } else { + r->z_planes[3] = n; // alpha, always plane 4 in zimg + +#if HAVE_ZIMG_ALPHA + zfmt->alpha = fmt.alpha == MP_ALPHA_PREMUL + ? ZIMG_ALPHA_PREMULTIPLIED : ZIMG_ALPHA_STRAIGHT; +#else + return false; +#endif + } + } + + r->num_planes = desc.num_planes; + + // Take care of input/output size, including slicing. + // 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 = r->real_w = MP_ALIGN_UP(fmt.w, 1 << desc.chroma_xs); + zfmt->height = r->real_h = MP_ALIGN_UP(fmt.h, 1 << desc.chroma_ys); + if (st) { + if (r->pack) { + zfmt->height = r->real_h = st->slice_h = + MPMIN(st->slice_y + st->slice_h, r->real_h) - st->slice_y; + + assert(MP_IS_ALIGNED(r->real_h, 1 << desc.chroma_ys)); + } else { + // Relies on st->dst being initialized first. + struct mp_zimg_repack *dst = st->dst; + + zfmt->active_region.width = dst->real_w * (double)fmt.w / dst->fmt.w; + zfmt->active_region.height = dst->real_h * st->scale_y; + + zfmt->active_region.top = st->slice_y * st->scale_y; + } + } + + zfmt->subsample_w = desc.chroma_xs; + zfmt->subsample_h = desc.chroma_ys; + + zfmt->color_family = ZIMG_COLOR_YUV; + if (desc.num_planes <= 2) { + 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); + // For MP_CSP_XYZ only valid primaries are defined in ST 428-1 + zfmt->color_primaries = fmt.color.space == MP_CSP_XYZ + ? ZIMG_PRIMARIES_ST428 + : 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; + } + + // mpv treats _some_ gray formats as RGB; zimg doesn't like this. + if (zfmt->color_family == ZIMG_COLOR_GREY && + zfmt->matrix_coefficients == ZIMG_MATRIX_RGB) + zfmt->matrix_coefficients = ZIMG_MATRIX_BT470_BG; + + return true; +} + +static bool allocate_buffer(struct mp_zimg_state *st, struct mp_zimg_repack *r) +{ + unsigned lines = 0; + int err; + if (r->pack) { + err = zimg_filter_graph_get_output_buffering(st->graph, &lines); + } else { + err = zimg_filter_graph_get_input_buffering(st->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->real_h : r->zmask[0] + 1; + if (h >= r->real_h) { + h = r->real_h; + r->zmask[0] = ZIMG_BUFFER_MAX; + } + + r->tmp = mp_image_alloc(r->zimgfmt, r->real_w, h); + talloc_steal(r, r->tmp); + + if (!r->tmp) + return false; + + // Note: although zimg doesn't require that the chroma plane's zmask is + // divided by the full size zmask, the repack callback requires it, + // since mp_repack can handle only proper slices. + 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 true; +} + +static bool mp_zimg_state_init(struct mp_zimg_context *ctx, + struct mp_zimg_state *st, + int slice_y, int slice_h) +{ + struct zimg_opts *opts = &ctx->opts; + + st->src = talloc_zero(NULL, struct mp_zimg_repack); + st->dst = talloc_zero(NULL, struct mp_zimg_repack); + + st->scale_y = ctx->src.h / (double)ctx->dst.h; + st->slice_y = slice_y; + st->slice_h = slice_h; + + zimg_image_format src_fmt, dst_fmt; + + // Note: do dst first, because src uses fields from dst. + if (!setup_format(&dst_fmt, st->dst, true, &ctx->dst, ctx, st) || + !setup_format(&src_fmt, st->src, false, &ctx->src, ctx, st)) + return false; + + zimg_graph_builder_params params; + zimg_graph_builder_params_default(¶ms, 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; + + // leave at default for SDR, which means 100 cd/m^2 for zimg + if (ctx->dst.color.hdr.max_luma > 0 && mp_trc_is_hdr(ctx->dst.color.gamma)) + params.nominal_peak_luminance = ctx->dst.color.hdr.max_luma; + + st->graph = zimg_filter_graph_build(&src_fmt, &dst_fmt, ¶ms); + if (!st->graph) { + char err[128] = {0}; + zimg_get_last_error(err, sizeof(err) - 1); + MP_ERR(ctx, "zimg_filter_graph_build: %s \n", err); + return false; + } + + size_t tmp_size; + if (!zimg_filter_graph_get_tmp_size(st->graph, &tmp_size)) { + tmp_size = MP_ALIGN_UP(tmp_size, ZIMG_ALIGN) + ZIMG_ALIGN; + st->tmp_alloc = ta_alloc_size(NULL, tmp_size); + if (st->tmp_alloc) + st->tmp = (void *)MP_ALIGN_UP((uintptr_t)st->tmp_alloc, ZIMG_ALIGN); + } + + if (!st->tmp_alloc) + return false; + + if (!allocate_buffer(st, st->src) || !allocate_buffer(st, st->dst)) + return false; + + return true; +} + +bool mp_zimg_config(struct mp_zimg_context *ctx) +{ + destroy_zimg(ctx); + + if (ctx->opts_cache) + mp_zimg_update_from_cmdline(ctx); + + int slices = ctx->opts.threads; + if (slices < 1) + slices = av_cpu_count(); + slices = MPCLAMP(slices, 1, 64); + + struct mp_imgfmt_desc dstfmt = mp_imgfmt_get_desc(ctx->dst.imgfmt); + if (!dstfmt.align_y) + goto fail; + int full_h = MP_ALIGN_UP(ctx->dst.h, dstfmt.align_y); + int slice_h = (full_h + slices - 1) / slices; + slice_h = MP_ALIGN_UP(slice_h, dstfmt.align_y); + slice_h = MP_ALIGN_UP(slice_h, 64); // for dithering and minimum slice size + slices = (full_h + slice_h - 1) / slice_h; + + int threads = slices - 1; + if (threads != ctx->current_thread_count) { + // Just destroy and recreate all - dumb and costly, but rarely happens. + TA_FREEP(&ctx->tp); + ctx->current_thread_count = 0; + if (threads) { + MP_VERBOSE(ctx, "using %d threads for scaling\n", threads); + ctx->tp = mp_thread_pool_create(NULL, threads, threads, threads); + if (!ctx->tp) + goto fail; + ctx->current_thread_count = threads; + } + } + + for (int n = 0; n < slices; n++) { + struct mp_zimg_state *st = talloc_zero(NULL, struct mp_zimg_state); + MP_TARRAY_APPEND(ctx, ctx->states, ctx->num_states, st); + + if (!mp_zimg_state_init(ctx, st, n * slice_h, slice_h)) + goto fail; + } + + assert(ctx->num_states == slices); + + return true; + +fail: + destroy_zimg(ctx); + return false; +} + +bool mp_zimg_config_image_params(struct mp_zimg_context *ctx) +{ + if (ctx->num_states) { + // All states are the same, so checking only one of them is sufficient. + struct mp_zimg_state *st = ctx->states[0]; + if (st->src && mp_image_params_equal(&ctx->src, &st->src->fmt) && + st->dst && mp_image_params_equal(&ctx->dst, &st->dst->fmt) && + (!ctx->opts_cache || !m_config_cache_update(ctx->opts_cache)) && + st->graph) + return true; + } + return mp_zimg_config(ctx); +} + +static void do_convert(struct mp_zimg_state *st) +{ + assert(st->graph); + + // An annoyance. + zimg_image_buffer *zsrc = &st->src->zbuf; + zimg_image_buffer_const zsrc_c = {ZIMG_API_VERSION}; + for (int n = 0; n < MP_ARRAY_SIZE(zsrc_c.plane); 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(st->graph, &zsrc_c, &st->dst->zbuf, st->tmp, + repack_entrypoint, st->src, + repack_entrypoint, st->dst); +} + +static void do_convert_thread(void *ptr) +{ + struct mp_zimg_state *st = ptr; + + do_convert(st); + mp_waiter_wakeup(&st->thread_waiter, 0); +} + +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; + } + + for (int n = 0; n < ctx->num_states; n++) { + struct mp_zimg_state *st = ctx->states[n]; + + if (!wrap_buffer(st, st->src, src) || !wrap_buffer(st, st->dst, dst)) { + MP_ERR(ctx, "zimg repacker initialization failed.\n"); + return false; + } + } + + for (int n = 1; n < ctx->num_states; n++) { + struct mp_zimg_state *st = ctx->states[n]; + + st->thread_waiter = (struct mp_waiter)MP_WAITER_INITIALIZER; + + bool r = mp_thread_pool_run(ctx->tp, do_convert_thread, st); + // This is guaranteed by the API; and unrolling would be inconvenient. + assert(r); + } + + do_convert(ctx->states[0]); + + for (int n = 1; n < ctx->num_states; n++) { + struct mp_zimg_state *st = ctx->states[n]; + + mp_waiter_wait(&st->thread_waiter); + } + + return true; +} + +static bool supports_format(int imgfmt, bool out) +{ + struct mp_image_params fmt = {.imgfmt = imgfmt}; + struct mp_zimg_repack t; + zimg_image_format zfmt; + return setup_format(&zfmt, &t, out, &fmt, NULL, 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); +} |