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Diffstat (limited to '')
| -rw-r--r-- | video/img_format.c | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/video/img_format.c b/video/img_format.c new file mode 100644 index 0000000..6b7857f --- /dev/null +++ b/video/img_format.c @@ -0,0 +1,824 @@ +/* + * 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 "video/img_format.h" +#include "video/mp_image.h" +#include "video/fmt-conversion.h" + +struct mp_imgfmt_entry { + const char *name; + // Valid if flags!=0. + // This can be incomplete, and missing fields are filled in: + // - sets num_planes and bpp[], derived from comps[] (rounds to bytes) + // - sets MP_IMGFLAG_GRAY, derived from comps[] + // - sets MP_IMGFLAG_ALPHA, derived from comps[] + // - sets align_x/y if 0, derived from chroma shift + // - sets xs[]/ys[] always, derived from num_planes/chroma_shift + // - sets MP_IMGFLAG_HAS_COMPS|MP_IMGFLAG_NE if num_planes>0 + // - sets MP_IMGFLAG_TYPE_UINT if no other type set + // - sets id to mp_imgfmt_list[] implied format + struct mp_imgfmt_desc desc; +}; + +#define FRINGE_GBRP(def, dname, b) \ + [def - IMGFMT_CUST_BASE] = { \ + .name = dname, \ + .desc = { .flags = MP_IMGFLAG_COLOR_RGB, \ + .comps = { {2, 0, 8, (b) - 8}, {0, 0, 8, (b) - 8}, \ + {1, 0, 8, (b) - 8}, }, }} + +#define FLOAT_YUV(def, dname, xs, ys, a) \ + [def - IMGFMT_CUST_BASE] = { \ + .name = dname, \ + .desc = { .flags = MP_IMGFLAG_COLOR_YUV | MP_IMGFLAG_TYPE_FLOAT, \ + .chroma_xs = xs, .chroma_ys = ys, \ + .comps = { {0, 0, 32}, {1, 0, 32}, {2, 0, 32}, \ + {3 * (a), 0, 32 * (a)} }, }} + +static const struct mp_imgfmt_entry mp_imgfmt_list[] = { + // not in ffmpeg + [IMGFMT_VDPAU_OUTPUT - IMGFMT_CUST_BASE] = { + .name = "vdpau_output", + .desc = { + .flags = MP_IMGFLAG_NE | MP_IMGFLAG_RGB | MP_IMGFLAG_HWACCEL, + }, + }, + [IMGFMT_RGB30 - IMGFMT_CUST_BASE] = { + .name = "rgb30", + .desc = { + .flags = MP_IMGFLAG_RGB, + .comps = { {0, 20, 10}, {0, 10, 10}, {0, 0, 10} }, + }, + }, + [IMGFMT_YAP8 - IMGFMT_CUST_BASE] = { + .name = "yap8", + .desc = { + .flags = MP_IMGFLAG_COLOR_YUV, + .comps = { {0, 0, 8}, {0}, {0}, {1, 0, 8} }, + }, + }, + [IMGFMT_YAP16 - IMGFMT_CUST_BASE] = { + .name = "yap16", + .desc = { + .flags = MP_IMGFLAG_COLOR_YUV, + .comps = { {0, 0, 16}, {0}, {0}, {1, 0, 16} }, + }, + }, + [IMGFMT_Y1 - IMGFMT_CUST_BASE] = { + .name = "y1", + .desc = { + .flags = MP_IMGFLAG_COLOR_RGB, + .comps = { {0, 0, 8, -7} }, + }, + }, + [IMGFMT_YAPF - IMGFMT_CUST_BASE] = { + .name = "grayaf32", // try to mimic ffmpeg naming convention + .desc = { + .flags = MP_IMGFLAG_COLOR_YUV | MP_IMGFLAG_TYPE_FLOAT, + .comps = { {0, 0, 32}, {0}, {0}, {1, 0, 32} }, + }, + }, + FLOAT_YUV(IMGFMT_444PF, "yuv444pf", 0, 0, 0), + FLOAT_YUV(IMGFMT_444APF, "yuva444pf", 0, 0, 1), + FLOAT_YUV(IMGFMT_420PF, "yuv420pf", 1, 1, 0), + FLOAT_YUV(IMGFMT_420APF, "yuva420pf", 1, 1, 1), + FLOAT_YUV(IMGFMT_422PF, "yuv422pf", 1, 0, 0), + FLOAT_YUV(IMGFMT_422APF, "yuva422pf", 1, 0, 1), + FLOAT_YUV(IMGFMT_440PF, "yuv440pf", 0, 1, 0), + FLOAT_YUV(IMGFMT_440APF, "yuva440pf", 0, 1, 1), + FLOAT_YUV(IMGFMT_410PF, "yuv410pf", 2, 2, 0), + FLOAT_YUV(IMGFMT_410APF, "yuva410pf", 2, 2, 1), + FLOAT_YUV(IMGFMT_411PF, "yuv411pf", 2, 0, 0), + FLOAT_YUV(IMGFMT_411APF, "yuva411pf", 2, 0, 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 void fill_pixdesc_layout(struct mp_imgfmt_desc *desc, + enum AVPixelFormat fmt, + const AVPixFmtDescriptor *pd) +{ + if (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; + + // 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; + bool is_ne = MP_SELECT_LE_BE(false, true) == is_be; + + // Packed sub-sampled YUV is very... special. + bool is_packed_ss_yuv = pd->log2_chroma_w && !pd->log2_chroma_h && + pd->comp[1].plane == 0 && pd->comp[2].plane == 0 && + pd->nb_components == 3; + + if (is_packed_ss_yuv) + desc->bpp[0] = pd->comp[1].step * 8; + + // Determine if there are any byte overlaps => relevant for determining + // access unit for endian, since pixdesc does not expose this, and assumes + // a weird model where you do separate memory fetches for each component. + bool any_shared_bytes = !!(pd->flags & AV_PIX_FMT_FLAG_BITSTREAM); + for (int c = 0; c < pd->nb_components; c++) { + for (int i = 0; i < c; i++) { + const AVComponentDescriptor *d1 = &pd->comp[c]; + const AVComponentDescriptor *d2 = &pd->comp[i]; + if (d1->plane == d2->plane) { + if (d1->offset + (d1->depth + 7) / 8u > d2->offset && + d2->offset + (d2->depth + 7) / 8u > d1->offset) + any_shared_bytes = true; + } + } + } + + 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; + + desc->num_planes = MPMAX(desc->num_planes, d->plane + 1); + + int plane_bits = desc->bpp[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->bpp[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)); + // 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 == 8) + offset += 8; + // Pixdesc's model sometimes requires accesses with varying word-sizes, + // as seen in bgr565 and other formats. Also, it makes you read some + // formats with multiple endian-dependent accesses, where accessing a + // larger unit would make more sense. (Consider X2RGB10BE, for which + // pixdesc wants you to perform 3 * 2 byte accesses, and swap each of + // the read 16 bit words. What you really want is to swap the entire 4 + // byte thing, and then extract the components with bit shifts). + // This is complete bullshit, so we transform it into word swaps before + // further processing. Care needs to be taken to not change formats like + // P010 or YA16 (prefer component accesses for them; P010 isn't even + // representable, because endian_shift is for all planes). + // As a heuristic, assume that if any components share a byte, the whole + // pixel is read as a single memory access and endian swapped at once. + int access_size = 8; + if (plane_bits > 8) { + if (any_shared_bytes) { + access_size = plane_bits; + if (is_be && word != access_size) { + // Before: offset = 8*byte_offset (with word bits of data) + // After: offset = bit_offset into swapped endian_size word + offset = access_size - word - offset; + } + } else { + access_size = word; + } + } + int endian_size = (access_size && !is_ne) ? access_size : 8; + int endian_shift = mp_log2(endian_size) - 3; + if (!MP_IS_POWER_OF_2(endian_size) || endian_shift < 0 || endian_shift > 3) + goto fail; + if (desc->endian_shift && desc->endian_shift != endian_shift) + goto fail; + desc->endian_shift = endian_shift; + + // 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 < desc->num_planes; p++) { + if (!desc->bpp[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; + 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 (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); + } + } + } + + // 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}; + } + + if (is_packed_ss_yuv) { + desc->flags |= MP_IMGFLAG_PACKED_SS_YUV; + desc->bpp[0] /= 1 << pd->log2_chroma_w; + } else if (!any_shared_bits) { + desc->flags |= MP_IMGFLAG_HAS_COMPS; + } + + return; + +fail: + for (int n = 0; n < 4; n++) + desc->comps[n] = (struct mp_imgfmt_comp_desc){0}; + // Average bit size fallback. + desc->num_planes = av_pix_fmt_count_planes(fmt); + for (int p = 0; p < desc->num_planes; p++) { + int ls = av_image_get_linesize(fmt, 256, p); + desc->bpp[p] = ls > 0 ? ls * 8 / 256 : 0; + } +} + +static bool mp_imgfmt_get_desc_from_pixdesc(int mpfmt, struct mp_imgfmt_desc *out) +{ + enum AVPixelFormat fmt = imgfmt2pixfmt(mpfmt); + const AVPixFmtDescriptor *pd = av_pix_fmt_desc_get(fmt); + if (!pd || pd->nb_components > 4) + return false; + + struct mp_imgfmt_desc desc = { + .id = mpfmt, + .chroma_xs = pd->log2_chroma_w, + .chroma_ys = pd->log2_chroma_h, + }; + + if (pd->flags & AV_PIX_FMT_FLAG_ALPHA) + desc.flags |= MP_IMGFLAG_ALPHA; + + if (pd->flags & AV_PIX_FMT_FLAG_HWACCEL) + desc.flags |= MP_IMGFLAG_TYPE_HW; + + // Pixdesc does not provide a flag for XYZ, so this is the best we can do. + if (strncmp(pd->name, "xyz", 3) == 0) { + desc.flags |= MP_IMGFLAG_COLOR_XYZ; + } else if (pd->flags & AV_PIX_FMT_FLAG_RGB) { + desc.flags |= MP_IMGFLAG_COLOR_RGB; + } else if (fmt == AV_PIX_FMT_MONOBLACK || fmt == AV_PIX_FMT_MONOWHITE) { + desc.flags |= MP_IMGFLAG_COLOR_RGB; + } else if (fmt == AV_PIX_FMT_PAL8) { + desc.flags |= MP_IMGFLAG_COLOR_RGB | MP_IMGFLAG_TYPE_PAL8; + } + + if (pd->flags & AV_PIX_FMT_FLAG_FLOAT) + desc.flags |= MP_IMGFLAG_TYPE_FLOAT; + + // Educated guess. + if (!(desc.flags & MP_IMGFLAG_COLOR_MASK) && + !(desc.flags & MP_IMGFLAG_TYPE_HW)) + desc.flags |= MP_IMGFLAG_COLOR_YUV; + + desc.align_x = 1 << desc.chroma_xs; + desc.align_y = 1 << desc.chroma_ys; + + fill_pixdesc_layout(&desc, fmt, pd); + + if (desc.flags & (MP_IMGFLAG_HAS_COMPS | MP_IMGFLAG_PACKED_SS_YUV)) { + if (!(desc.flags & MP_IMGFLAG_TYPE_MASK)) + desc.flags |= MP_IMGFLAG_TYPE_UINT; + } + + if (desc.bpp[0] % 8u && (pd->flags & AV_PIX_FMT_FLAG_BITSTREAM)) + desc.align_x = 8 / desc.bpp[0]; // expect power of 2 + + // Very heuristical. + bool is_ne = !desc.endian_shift; + bool need_endian = (desc.comps[0].size % 8u && desc.bpp[0] > 8) || + desc.comps[0].size > 8; + + if (need_endian) { + bool is_le = MP_SELECT_LE_BE(is_ne, !is_ne); + desc.flags |= is_le ? MP_IMGFLAG_LE : MP_IMGFLAG_BE; + } else { + desc.flags |= MP_IMGFLAG_LE | MP_IMGFLAG_BE; + } + + *out = desc; + return true; +} + +bool mp_imgfmt_get_packed_yuv_locations(int imgfmt, uint8_t *luma_offsets) +{ + struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(imgfmt); + if (!(desc.flags & MP_IMGFLAG_PACKED_SS_YUV)) + return false; + + assert(desc.num_planes == 1); + + // 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 << desc.chroma_xs); lsample++) { + while (1) { + if (cur_offset + lsize > desc.bpp[0] * desc.align_x) + return false; + bool free = true; + for (int c = 0; c < 3; 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; + } + luma_offsets[lsample] = cur_offset; + cur_offset += lsize; + } + + luma_offsets[0] = desc.comps[0].offset; + return true; +} + +static bool get_native_desc(int mpfmt, struct mp_imgfmt_desc *desc) +{ + const struct mp_imgfmt_entry *p = get_mp_desc(mpfmt); + if (!p || !p->desc.flags) + return false; + + *desc = p->desc; + + // Fill in some fields mp_imgfmt_entry.desc is not required to set. + + desc->id = mpfmt; + + for (int n = 0; n < MP_NUM_COMPONENTS; n++) { + struct mp_imgfmt_comp_desc *cd = &desc->comps[n]; + if (cd->size) + desc->num_planes = MPMAX(desc->num_planes, cd->plane + 1); + desc->bpp[cd->plane] = + MPMAX(desc->bpp[cd->plane], MP_ALIGN_UP(cd->offset + cd->size, 8)); + } + + if (!desc->align_x && !desc->align_y) { + desc->align_x = 1 << desc->chroma_xs; + desc->align_y = 1 << desc->chroma_ys; + } + + if (desc->num_planes) + desc->flags |= MP_IMGFLAG_HAS_COMPS | MP_IMGFLAG_NE; + + if (!(desc->flags & MP_IMGFLAG_TYPE_MASK)) + desc->flags |= MP_IMGFLAG_TYPE_UINT; + + return true; +} + +int mp_imgfmt_desc_get_num_comps(struct mp_imgfmt_desc *desc) +{ + int flags = desc->flags; + if (!(flags & MP_IMGFLAG_COLOR_MASK)) + return 0; + return 3 + (flags & MP_IMGFLAG_GRAY ? -2 : 0) + !!(flags & MP_IMGFLAG_ALPHA); +} + +struct mp_imgfmt_desc mp_imgfmt_get_desc(int mpfmt) +{ + struct mp_imgfmt_desc desc; + + if (!get_native_desc(mpfmt, &desc) && + !mp_imgfmt_get_desc_from_pixdesc(mpfmt, &desc)) + return (struct mp_imgfmt_desc){0}; + + 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; + } + + bool is_ba = desc.num_planes > 0; + for (int p = 0; p < desc.num_planes; p++) + is_ba = !(desc.bpp[p] % 8u); + + if (is_ba) + desc.flags |= MP_IMGFLAG_BYTE_ALIGNED; + + if (desc.flags & MP_IMGFLAG_HAS_COMPS) { + if (desc.comps[3].size) + desc.flags |= MP_IMGFLAG_ALPHA; + + // Assuming all colors are (CCC+[A]) or (C+[A]), the latter being gray. + if (!desc.comps[1].size) + desc.flags |= MP_IMGFLAG_GRAY; + + bool bb = true; + for (int n = 0; n < MP_NUM_COMPONENTS; n++) { + if (desc.comps[n].offset % 8u || desc.comps[n].size % 8u) + bb = false; + } + if (bb) + desc.flags |= MP_IMGFLAG_BYTES; + } + + if ((desc.flags & (MP_IMGFLAG_YUV | MP_IMGFLAG_RGB)) + && (desc.flags & MP_IMGFLAG_HAS_COMPS) + && (desc.flags & MP_IMGFLAG_BYTES) + && ((desc.flags & MP_IMGFLAG_TYPE_MASK) == MP_IMGFLAG_TYPE_UINT)) + { + int cnt = mp_imgfmt_desc_get_num_comps(&desc); + bool same_depth = true; + for (int p = 0; p < desc.num_planes; p++) + same_depth &= desc.bpp[p] == desc.bpp[0]; + if (same_depth && cnt == desc.num_planes) { + if (desc.flags & MP_IMGFLAG_YUV) { + desc.flags |= MP_IMGFLAG_YUV_P; + } else { + desc.flags |= MP_IMGFLAG_RGB_P; + } + } + if (cnt == 3 && desc.num_planes == 2 && + desc.bpp[1] == desc.bpp[0] * 2 && + (desc.flags & MP_IMGFLAG_YUV)) + { + + desc.flags |= MP_IMGFLAG_YUV_NV; + } + } + + 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; +} + +static enum mp_csp get_forced_csp_from_flags(int flags) +{ + if (flags & MP_IMGFLAG_COLOR_XYZ) + return MP_CSP_XYZ; + + if (flags & MP_IMGFLAG_COLOR_RGB) + return MP_CSP_RGB; + + return MP_CSP_AUTO; +} + +enum mp_csp mp_imgfmt_get_forced_csp(int imgfmt) +{ + return get_forced_csp_from_flags(mp_imgfmt_get_desc(imgfmt).flags); +} + +static enum mp_component_type get_component_type_from_flags(int flags) +{ + if (flags & MP_IMGFLAG_TYPE_UINT) + return MP_COMPONENT_TYPE_UINT; + + if (flags & MP_IMGFLAG_TYPE_FLOAT) + return MP_COMPONENT_TYPE_FLOAT; + + return MP_COMPONENT_TYPE_UNKNOWN; +} + +enum mp_component_type mp_imgfmt_get_component_type(int imgfmt) +{ + return get_component_type_from_flags(mp_imgfmt_get_desc(imgfmt).flags); +} + +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) +{ + 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; + + if (desc.endian_shift || !(desc.flags & MP_IMGFLAG_HAS_COMPS)) + return false; + + res.component_type = get_component_type_from_flags(desc.flags); + if (!res.component_type) + return false; + + struct mp_imgfmt_comp_desc *comp0 = &desc.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 (desc.bpp[n] % comp0->size) + return false; + res.planes[n].num_components = desc.bpp[n] / comp0->size; + } + + for (int n = 0; n < MP_NUM_COMPONENTS; n++) { + struct mp_imgfmt_comp_desc *comp = &desc.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 = get_forced_csp_from_flags(desc.flags); + + 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; +} |