/* * Filter layer - format negotiation * Copyright (c) 2007 Bobby Bingham * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/eval.h" #include "libavutil/mem.h" #include "libavutil/pixdesc.h" #include "avfilter.h" #include "internal.h" #include "formats.h" /** * Add all refs from a to ret and destroy a. */ #define MERGE_REF(ret, a, fmts, type, fail_statement) \ do { \ type ***tmp; \ int i; \ \ if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \ sizeof(*tmp)))) \ { fail_statement } \ ret->refs = tmp; \ \ for (i = 0; i < a->refcount; i ++) { \ ret->refs[ret->refcount] = a->refs[i]; \ *ret->refs[ret->refcount++] = ret; \ } \ \ av_freep(&a->refs); \ av_freep(&a->fmts); \ av_freep(&a); \ } while (0) /** * Add all formats common to a and b to a, add b's refs to a and destroy b. * If check is set, nothing is modified and it is only checked whether * the formats are compatible. * If empty_allowed is set and one of a,b->nb is zero, the lists are * merged; otherwise, 0 (for nonmergeability) is returned. */ #define MERGE_FORMATS(a, b, fmts, nb, type, check, empty_allowed) \ do { \ int i, j, k = 0, skip = 0; \ \ if (empty_allowed) { \ if (!a->nb || !b->nb) { \ if (check) \ return 1; \ if (!a->nb) \ FFSWAP(type *, a, b); \ skip = 1; \ } \ } \ if (!skip) { \ for (i = 0; i < a->nb; i++) \ for (j = 0; j < b->nb; j++) \ if (a->fmts[i] == b->fmts[j]) { \ if (check) \ return 1; \ a->fmts[k++] = a->fmts[i]; \ break; \ } \ /* Check that there was at least one common format. \ * Notice that both a and b are unchanged if not. */ \ if (!k) \ return 0; \ av_assert2(!check); \ a->nb = k; \ } \ \ MERGE_REF(a, b, fmts, type, return AVERROR(ENOMEM);); \ } while (0) static int merge_formats_internal(AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type, int check) { int i, j; int alpha1=0, alpha2=0; int chroma1=0, chroma2=0; av_assert2(check || (a->refcount && b->refcount)); if (a == b) return 1; /* Do not lose chroma or alpha in merging. It happens if both lists have formats with chroma (resp. alpha), but the only formats in common do not have it (e.g. YUV+gray vs. RGB+gray): in that case, the merging would select the gray format, possibly causing a lossy conversion elsewhere in the graph. To avoid that, pretend that there are no common formats to force the insertion of a conversion filter. */ if (type == AVMEDIA_TYPE_VIDEO) for (i = 0; i < a->nb_formats; i++) { const AVPixFmtDescriptor *const adesc = av_pix_fmt_desc_get(a->formats[i]); for (j = 0; j < b->nb_formats; j++) { const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]); alpha2 |= adesc->flags & bdesc->flags & AV_PIX_FMT_FLAG_ALPHA; chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1; if (a->formats[i] == b->formats[j]) { alpha1 |= adesc->flags & AV_PIX_FMT_FLAG_ALPHA; chroma1|= adesc->nb_components > 1; } } } // If chroma or alpha can be lost through merging then do not merge if (alpha2 > alpha1 || chroma2 > chroma1) return 0; MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, check, 0); return 1; } /** * Check the formats lists for compatibility for merging without actually * merging. * * @return 1 if they are compatible, 0 if not. */ static int can_merge_pix_fmts(const void *a, const void *b) { return merge_formats_internal((AVFilterFormats *)a, (AVFilterFormats *)b, AVMEDIA_TYPE_VIDEO, 1); } /** * Merge the formats lists if they are compatible and update all the * references of a and b to point to the combined list and free the old * lists as needed. The combined list usually contains the intersection of * the lists of a and b. * * Both a and b must have owners (i.e. refcount > 0) for these functions. * * @return 1 if merging succeeded, 0 if a and b are incompatible * and negative AVERROR code on failure. * a and b are unmodified if 0 is returned. */ static int merge_pix_fmts(void *a, void *b) { return merge_formats_internal(a, b, AVMEDIA_TYPE_VIDEO, 0); } /** * See can_merge_pix_fmts(). */ static int can_merge_sample_fmts(const void *a, const void *b) { return merge_formats_internal((AVFilterFormats *)a, (AVFilterFormats *)b, AVMEDIA_TYPE_AUDIO, 1); } /** * See merge_pix_fmts(). */ static int merge_sample_fmts(void *a, void *b) { return merge_formats_internal(a, b, AVMEDIA_TYPE_AUDIO, 0); } static int merge_samplerates_internal(AVFilterFormats *a, AVFilterFormats *b, int check) { av_assert2(check || (a->refcount && b->refcount)); if (a == b) return 1; MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, check, 1); return 1; } /** * See can_merge_pix_fmts(). */ static int can_merge_samplerates(const void *a, const void *b) { return merge_samplerates_internal((AVFilterFormats *)a, (AVFilterFormats *)b, 1); } /** * See merge_pix_fmts(). */ static int merge_samplerates(void *a, void *b) { return merge_samplerates_internal(a, b, 0); } /** * See merge_pix_fmts(). */ static int merge_channel_layouts_internal(AVFilterChannelLayouts *a, AVFilterChannelLayouts *b, int check) { AVChannelLayout *channel_layouts = NULL; unsigned a_all = a->all_layouts + a->all_counts; unsigned b_all = b->all_layouts + b->all_counts; int ret_max, ret_nb = 0, i, j, round; av_assert2(a->refcount && b->refcount); if (a == b) return 1; /* Put the most generic set in a, to avoid doing everything twice */ if (a_all < b_all) { FFSWAP(AVFilterChannelLayouts *, a, b); FFSWAP(unsigned, a_all, b_all); } if (a_all) { if (a_all == 1 && !b_all) { /* keep only known layouts in b; works also for b_all = 1 */ for (i = j = 0; i < b->nb_channel_layouts; i++) if (KNOWN(&b->channel_layouts[i]) && i != j++) { if (check) return 1; av_channel_layout_copy(&b->channel_layouts[j], &b->channel_layouts[i]); } /* Not optimal: the unknown layouts of b may become known after another merge. */ if (!j) return 0; b->nb_channel_layouts = j; } MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, return AVERROR(ENOMEM);); return 1; } ret_max = a->nb_channel_layouts + b->nb_channel_layouts; if (!check && !(channel_layouts = av_calloc(ret_max, sizeof(*channel_layouts)))) return AVERROR(ENOMEM); /* a[known] intersect b[known] */ for (i = 0; i < a->nb_channel_layouts; i++) { if (!KNOWN(&a->channel_layouts[i])) continue; for (j = 0; j < b->nb_channel_layouts; j++) { if (!av_channel_layout_compare(&a->channel_layouts[i], &b->channel_layouts[j])) { if (check) return 1; av_channel_layout_copy(&channel_layouts[ret_nb++], &a->channel_layouts[i]); av_channel_layout_uninit(&a->channel_layouts[i]); av_channel_layout_uninit(&b->channel_layouts[j]); break; } } } /* 1st round: a[known] intersect b[generic] 2nd round: a[generic] intersect b[known] */ for (round = 0; round < 2; round++) { for (i = 0; i < a->nb_channel_layouts; i++) { AVChannelLayout *fmt = &a->channel_layouts[i], bfmt = { 0 }; if (!av_channel_layout_check(fmt) || !KNOWN(fmt)) continue; bfmt = FF_COUNT2LAYOUT(fmt->nb_channels); for (j = 0; j < b->nb_channel_layouts; j++) if (!av_channel_layout_compare(&b->channel_layouts[j], &bfmt)) { if (check) return 1; av_channel_layout_copy(&channel_layouts[ret_nb++], fmt); } } /* 1st round: swap to prepare 2nd round; 2nd round: put it back */ FFSWAP(AVFilterChannelLayouts *, a, b); } /* a[generic] intersect b[generic] */ for (i = 0; i < a->nb_channel_layouts; i++) { if (KNOWN(&a->channel_layouts[i])) continue; for (j = 0; j < b->nb_channel_layouts; j++) if (!av_channel_layout_compare(&a->channel_layouts[i], &b->channel_layouts[j])) { if (check) return 1; av_channel_layout_copy(&channel_layouts[ret_nb++], &a->channel_layouts[i]); } } if (!ret_nb) { av_free(channel_layouts); return 0; } if (a->refcount > b->refcount) FFSWAP(AVFilterChannelLayouts *, a, b); MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, { av_free(channel_layouts); return AVERROR(ENOMEM); }); av_freep(&b->channel_layouts); b->channel_layouts = channel_layouts; b->nb_channel_layouts = ret_nb; return 1; } static int can_merge_channel_layouts(const void *a, const void *b) { return merge_channel_layouts_internal((AVFilterChannelLayouts *)a, (AVFilterChannelLayouts *)b, 1); } static int merge_channel_layouts(void *a, void *b) { return merge_channel_layouts_internal(a, b, 0); } static int merge_generic_internal(AVFilterFormats *a, AVFilterFormats *b, int check) { av_assert2(check || (a->refcount && b->refcount)); if (a == b) return 1; MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, check, 0); return 1; } static int can_merge_generic(const void *a, const void *b) { return merge_generic_internal((AVFilterFormats *)a, (AVFilterFormats *)b, 1); } static int merge_generic(void *a, void *b) { return merge_generic_internal(a, b, 0); } static const AVFilterFormatsMerger mergers_video[] = { { .offset = offsetof(AVFilterFormatsConfig, formats), .merge = merge_pix_fmts, .can_merge = can_merge_pix_fmts, }, { .offset = offsetof(AVFilterFormatsConfig, color_spaces), .merge = merge_generic, .can_merge = can_merge_generic, }, { .offset = offsetof(AVFilterFormatsConfig, color_ranges), .merge = merge_generic, .can_merge = can_merge_generic, }, }; static const AVFilterFormatsMerger mergers_audio[] = { { .offset = offsetof(AVFilterFormatsConfig, channel_layouts), .merge = merge_channel_layouts, .can_merge = can_merge_channel_layouts, }, { .offset = offsetof(AVFilterFormatsConfig, samplerates), .merge = merge_samplerates, .can_merge = can_merge_samplerates, }, { .offset = offsetof(AVFilterFormatsConfig, formats), .merge = merge_sample_fmts, .can_merge = can_merge_sample_fmts, }, }; static const AVFilterNegotiation negotiate_video = { .nb_mergers = FF_ARRAY_ELEMS(mergers_video), .mergers = mergers_video, .conversion_filter = "scale", .conversion_opts_offset = offsetof(AVFilterGraph, scale_sws_opts), }; static const AVFilterNegotiation negotiate_audio = { .nb_mergers = FF_ARRAY_ELEMS(mergers_audio), .mergers = mergers_audio, .conversion_filter = "aresample", .conversion_opts_offset = offsetof(AVFilterGraph, aresample_swr_opts), }; const AVFilterNegotiation *ff_filter_get_negotiation(AVFilterLink *link) { switch (link->type) { case AVMEDIA_TYPE_VIDEO: return &negotiate_video; case AVMEDIA_TYPE_AUDIO: return &negotiate_audio; default: return NULL; } } int ff_fmt_is_in(int fmt, const int *fmts) { const int *p; for (p = fmts; *p != -1; p++) { if (fmt == *p) return 1; } return 0; } #define MAKE_FORMAT_LIST(type, field, count_field) \ type *formats; \ int count = 0; \ if (fmts) \ for (count = 0; fmts[count] != -1; count++) \ ; \ formats = av_mallocz(sizeof(*formats)); \ if (!formats) \ return NULL; \ formats->count_field = count; \ if (count) { \ formats->field = av_malloc_array(count, sizeof(*formats->field)); \ if (!formats->field) { \ av_freep(&formats); \ return NULL; \ } \ } AVFilterFormats *ff_make_format_list(const int *fmts) { MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats); while (count--) formats->formats[count] = fmts[count]; return formats; } AVFilterChannelLayouts *ff_make_channel_layout_list(const AVChannelLayout *fmts) { AVFilterChannelLayouts *ch_layouts; int count = 0; if (fmts) for (count = 0; fmts[count].nb_channels; count++) ; ch_layouts = av_mallocz(sizeof(*ch_layouts)); if (!ch_layouts) return NULL; ch_layouts->nb_channel_layouts = count; if (count) { ch_layouts->channel_layouts = av_calloc(count, sizeof(*ch_layouts->channel_layouts)); if (!ch_layouts->channel_layouts) { av_freep(&ch_layouts); return NULL; } for (int i = 0; i < count; i++) { int ret = av_channel_layout_copy(&ch_layouts->channel_layouts[i], &fmts[i]); if (ret < 0) goto fail; } } return ch_layouts; fail: for (int i = 0; i < count; i++) av_channel_layout_uninit(&ch_layouts->channel_layouts[i]); av_free(ch_layouts->channel_layouts); av_freep(&ch_layouts); return NULL; } #define ADD_FORMAT(f, fmt, unref_fn, type, list, nb) \ do { \ type *fmts; \ \ if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) { \ return AVERROR(ENOMEM); \ } \ \ fmts = av_realloc_array((*f)->list, (*f)->nb + 1, \ sizeof(*(*f)->list)); \ if (!fmts) { \ unref_fn(f); \ return AVERROR(ENOMEM); \ } \ \ (*f)->list = fmts; \ ASSIGN_FMT(f, fmt, list, nb); \ } while (0) #define ASSIGN_FMT(f, fmt, list, nb) \ do { \ (*f)->list[(*f)->nb++] = fmt; \ } while (0) int ff_add_format(AVFilterFormats **avff, int64_t fmt) { ADD_FORMAT(avff, fmt, ff_formats_unref, int, formats, nb_formats); return 0; } #undef ASSIGN_FMT #define ASSIGN_FMT(f, fmt, list, nb) \ do { \ int ret; \ memset((*f)->list + (*f)->nb, 0, sizeof(*(*f)->list)); \ ret = av_channel_layout_copy(&(*f)->list[(*f)->nb], fmt); \ if (ret < 0) \ return ret; \ (*f)->nb++; \ } while (0) int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout) { av_assert1(!(*l && (*l)->all_layouts)); ADD_FORMAT(l, channel_layout, ff_channel_layouts_unref, AVChannelLayout, channel_layouts, nb_channel_layouts); return 0; } AVFilterFormats *ff_make_formats_list_singleton(int fmt) { int fmts[2] = { fmt, -1 }; return ff_make_format_list(fmts); } AVFilterFormats *ff_all_formats(enum AVMediaType type) { AVFilterFormats *ret = NULL; if (type == AVMEDIA_TYPE_VIDEO) { return ff_formats_pixdesc_filter(0, 0); } else if (type == AVMEDIA_TYPE_AUDIO) { enum AVSampleFormat fmt = 0; while (av_get_sample_fmt_name(fmt)) { if (ff_add_format(&ret, fmt) < 0) return NULL; fmt++; } } return ret; } AVFilterFormats *ff_formats_pixdesc_filter(unsigned want, unsigned rej) { unsigned nb_formats, fmt, flags; AVFilterFormats *formats = NULL; while (1) { nb_formats = 0; for (fmt = 0;; fmt++) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); if (!desc) break; flags = desc->flags; if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL) && !(desc->flags & AV_PIX_FMT_FLAG_PLANAR) && (desc->log2_chroma_w || desc->log2_chroma_h)) flags |= FF_PIX_FMT_FLAG_SW_FLAT_SUB; if ((flags & (want | rej)) != want) continue; if (formats) formats->formats[nb_formats] = fmt; nb_formats++; } if (formats) { av_assert0(formats->nb_formats == nb_formats); return formats; } formats = av_mallocz(sizeof(*formats)); if (!formats) return NULL; formats->nb_formats = nb_formats; if (nb_formats) { formats->formats = av_malloc_array(nb_formats, sizeof(*formats->formats)); if (!formats->formats) { av_freep(&formats); return NULL; } } } } AVFilterFormats *ff_planar_sample_fmts(void) { AVFilterFormats *ret = NULL; int fmt; for (fmt = 0; av_get_bytes_per_sample(fmt)>0; fmt++) if (av_sample_fmt_is_planar(fmt)) if (ff_add_format(&ret, fmt) < 0) return NULL; return ret; } AVFilterFormats *ff_all_samplerates(void) { AVFilterFormats *ret = av_mallocz(sizeof(*ret)); return ret; } AVFilterChannelLayouts *ff_all_channel_layouts(void) { AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret)); if (!ret) return NULL; ret->all_layouts = 1; return ret; } AVFilterChannelLayouts *ff_all_channel_counts(void) { AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret)); if (!ret) return NULL; ret->all_layouts = ret->all_counts = 1; return ret; } AVFilterFormats *ff_all_color_spaces(void) { AVFilterFormats *ret = NULL; if (ff_add_format(&ret, AVCOL_SPC_UNSPECIFIED) < 0) return NULL; for (int csp = 0; csp < AVCOL_SPC_NB; csp++) { if (csp == AVCOL_SPC_RESERVED || csp == AVCOL_SPC_UNSPECIFIED) continue; if (ff_add_format(&ret, csp) < 0) return NULL; } return ret; } AVFilterFormats *ff_all_color_ranges(void) { AVFilterFormats *ret = NULL; for (int range = 0; range < AVCOL_RANGE_NB; range++) { if (ff_add_format(&ret, range) < 0) return NULL; } return ret; } #define FORMATS_REF(f, ref, unref_fn) \ void *tmp; \ \ if (!f) \ return AVERROR(ENOMEM); \ \ tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1); \ if (!tmp) { \ unref_fn(&f); \ return AVERROR(ENOMEM); \ } \ f->refs = tmp; \ f->refs[f->refcount++] = ref; \ *ref = f; \ return 0 int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref) { FORMATS_REF(f, ref, ff_channel_layouts_unref); } int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref) { FORMATS_REF(f, ref, ff_formats_unref); } #define FIND_REF_INDEX(ref, idx) \ do { \ int i; \ for (i = 0; i < (*ref)->refcount; i ++) \ if((*ref)->refs[i] == ref) { \ idx = i; \ break; \ } \ } while (0) #define FORMATS_UNREF(ref, list) \ do { \ int idx = -1; \ \ if (!*ref) \ return; \ \ FIND_REF_INDEX(ref, idx); \ \ if (idx >= 0) { \ memmove((*ref)->refs + idx, (*ref)->refs + idx + 1, \ sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \ --(*ref)->refcount; \ } \ if (!(*ref)->refcount) { \ FREE_LIST(ref, list); \ av_free((*ref)->list); \ av_free((*ref)->refs); \ av_free(*ref); \ } \ *ref = NULL; \ } while (0) #define FREE_LIST(ref, list) do { } while(0) void ff_formats_unref(AVFilterFormats **ref) { FORMATS_UNREF(ref, formats); } #undef FREE_LIST #define FREE_LIST(ref, list) \ do { \ for (int i = 0; i < (*ref)->nb_channel_layouts; i++) \ av_channel_layout_uninit(&(*ref)->list[i]); \ } while(0) void ff_channel_layouts_unref(AVFilterChannelLayouts **ref) { FORMATS_UNREF(ref, channel_layouts); } #define FORMATS_CHANGEREF(oldref, newref) \ do { \ int idx = -1; \ \ FIND_REF_INDEX(oldref, idx); \ \ if (idx >= 0) { \ (*oldref)->refs[idx] = newref; \ *newref = *oldref; \ *oldref = NULL; \ } \ } while (0) void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref) { FORMATS_CHANGEREF(oldref, newref); } void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref) { FORMATS_CHANGEREF(oldref, newref); } #define SET_COMMON_FORMATS(ctx, fmts, media_type, ref_fn, unref_fn) \ int i; \ \ if (!fmts) \ return AVERROR(ENOMEM); \ \ for (i = 0; i < ctx->nb_inputs; i++) { \ AVFilterLink *const link = ctx->inputs[i]; \ if (link && !link->outcfg.fmts && \ (media_type == AVMEDIA_TYPE_UNKNOWN || link->type == media_type)) { \ int ret = ref_fn(fmts, &ctx->inputs[i]->outcfg.fmts); \ if (ret < 0) { \ return ret; \ } \ } \ } \ for (i = 0; i < ctx->nb_outputs; i++) { \ AVFilterLink *const link = ctx->outputs[i]; \ if (link && !link->incfg.fmts && \ (media_type == AVMEDIA_TYPE_UNKNOWN || link->type == media_type)) { \ int ret = ref_fn(fmts, &ctx->outputs[i]->incfg.fmts); \ if (ret < 0) { \ return ret; \ } \ } \ } \ \ if (!fmts->refcount) \ unref_fn(&fmts); \ \ return 0; int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts) { SET_COMMON_FORMATS(ctx, channel_layouts, AVMEDIA_TYPE_AUDIO, ff_channel_layouts_ref, ff_channel_layouts_unref); } int ff_set_common_channel_layouts_from_list(AVFilterContext *ctx, const AVChannelLayout *fmts) { return ff_set_common_channel_layouts(ctx, ff_make_channel_layout_list(fmts)); } int ff_set_common_all_channel_counts(AVFilterContext *ctx) { return ff_set_common_channel_layouts(ctx, ff_all_channel_counts()); } int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates) { SET_COMMON_FORMATS(ctx, samplerates, AVMEDIA_TYPE_AUDIO, ff_formats_ref, ff_formats_unref); } int ff_set_common_samplerates_from_list(AVFilterContext *ctx, const int *samplerates) { return ff_set_common_samplerates(ctx, ff_make_format_list(samplerates)); } int ff_set_common_all_samplerates(AVFilterContext *ctx) { return ff_set_common_samplerates(ctx, ff_all_samplerates()); } int ff_set_common_color_spaces(AVFilterContext *ctx, AVFilterFormats *color_spaces) { SET_COMMON_FORMATS(ctx, color_spaces, AVMEDIA_TYPE_VIDEO, ff_formats_ref, ff_formats_unref); } int ff_set_common_color_spaces_from_list(AVFilterContext *ctx, const int *color_ranges) { return ff_set_common_color_spaces(ctx, ff_make_format_list(color_ranges)); } int ff_set_common_all_color_spaces(AVFilterContext *ctx) { return ff_set_common_color_spaces(ctx, ff_all_color_spaces()); } int ff_set_common_color_ranges(AVFilterContext *ctx, AVFilterFormats *color_ranges) { SET_COMMON_FORMATS(ctx, color_ranges, AVMEDIA_TYPE_VIDEO, ff_formats_ref, ff_formats_unref); } int ff_set_common_color_ranges_from_list(AVFilterContext *ctx, const int *color_ranges) { return ff_set_common_color_ranges(ctx, ff_make_format_list(color_ranges)); } int ff_set_common_all_color_ranges(AVFilterContext *ctx) { return ff_set_common_color_ranges(ctx, ff_all_color_ranges()); } /** * A helper for query_formats() which sets all links to the same list of * formats. If there are no links hooked to this filter, the list of formats is * freed. */ int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats) { SET_COMMON_FORMATS(ctx, formats, AVMEDIA_TYPE_UNKNOWN, ff_formats_ref, ff_formats_unref); } int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts) { return ff_set_common_formats(ctx, ff_make_format_list(fmts)); } int ff_default_query_formats(AVFilterContext *ctx) { const AVFilter *const f = ctx->filter; AVFilterFormats *formats; enum AVMediaType type; int ret; switch (f->formats_state) { case FF_FILTER_FORMATS_PIXFMT_LIST: type = AVMEDIA_TYPE_VIDEO; formats = ff_make_format_list(f->formats.pixels_list); break; case FF_FILTER_FORMATS_SAMPLEFMTS_LIST: type = AVMEDIA_TYPE_AUDIO; formats = ff_make_format_list(f->formats.samples_list); break; case FF_FILTER_FORMATS_SINGLE_PIXFMT: type = AVMEDIA_TYPE_VIDEO; formats = ff_make_formats_list_singleton(f->formats.pix_fmt); break; case FF_FILTER_FORMATS_SINGLE_SAMPLEFMT: type = AVMEDIA_TYPE_AUDIO; formats = ff_make_formats_list_singleton(f->formats.sample_fmt); break; default: av_assert2(!"Unreachable"); /* Intended fallthrough */ case FF_FILTER_FORMATS_PASSTHROUGH: case FF_FILTER_FORMATS_QUERY_FUNC: type = AVMEDIA_TYPE_UNKNOWN; formats = ff_all_formats(ctx->nb_inputs ? ctx->inputs [0]->type : ctx->nb_outputs ? ctx->outputs[0]->type : AVMEDIA_TYPE_VIDEO); break; } ret = ff_set_common_formats(ctx, formats); if (ret < 0) return ret; if (type != AVMEDIA_TYPE_AUDIO) { ret = ff_set_common_all_color_spaces(ctx); if (ret < 0) return ret; ret = ff_set_common_all_color_ranges(ctx); if (ret < 0) return ret; } if (type != AVMEDIA_TYPE_VIDEO) { ret = ff_set_common_all_channel_counts(ctx); if (ret < 0) return ret; ret = ff_set_common_all_samplerates(ctx); if (ret < 0) return ret; } return 0; } /* internal functions for parsing audio format arguments */ int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx) { char *tail; int pix_fmt = av_get_pix_fmt(arg); if (pix_fmt == AV_PIX_FMT_NONE) { pix_fmt = strtol(arg, &tail, 0); if (*tail || !av_pix_fmt_desc_get(pix_fmt)) { av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg); return AVERROR(EINVAL); } } *ret = pix_fmt; return 0; } int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx) { char *tail; double srate = av_strtod(arg, &tail); if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) { av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg); return AVERROR(EINVAL); } *ret = srate; return 0; } int ff_parse_channel_layout(AVChannelLayout *ret, int *nret, const char *arg, void *log_ctx) { AVChannelLayout chlayout = { 0 }; int res; res = av_channel_layout_from_string(&chlayout, arg); if (res < 0) { av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg); return AVERROR(EINVAL); } if (chlayout.order == AV_CHANNEL_ORDER_UNSPEC && !nret) { av_log(log_ctx, AV_LOG_ERROR, "Unknown channel layout '%s' is not supported.\n", arg); return AVERROR(EINVAL); } *ret = chlayout; if (nret) *nret = chlayout.nb_channels; return 0; } static int check_list(void *log, const char *name, const AVFilterFormats *fmts) { unsigned i, j; if (!fmts) return 0; if (!fmts->nb_formats) { av_log(log, AV_LOG_ERROR, "Empty %s list\n", name); return AVERROR(EINVAL); } for (i = 0; i < fmts->nb_formats; i++) { for (j = i + 1; j < fmts->nb_formats; j++) { if (fmts->formats[i] == fmts->formats[j]) { av_log(log, AV_LOG_ERROR, "Duplicated %s\n", name); return AVERROR(EINVAL); } } } return 0; } int ff_formats_check_pixel_formats(void *log, const AVFilterFormats *fmts) { return check_list(log, "pixel format", fmts); } int ff_formats_check_sample_formats(void *log, const AVFilterFormats *fmts) { return check_list(log, "sample format", fmts); } int ff_formats_check_sample_rates(void *log, const AVFilterFormats *fmts) { if (!fmts || !fmts->nb_formats) return 0; return check_list(log, "sample rate", fmts); } int ff_formats_check_color_spaces(void *log, const AVFilterFormats *fmts) { for (int i = 0; fmts && i < fmts->nb_formats; i++) { if (fmts->formats[i] == AVCOL_SPC_RESERVED) { av_log(log, AV_LOG_ERROR, "Invalid color range\n"); return AVERROR(EINVAL); } } return check_list(log, "color space", fmts); } int ff_formats_check_color_ranges(void *log, const AVFilterFormats *fmts) { return check_list(log, "color range", fmts); } static int layouts_compatible(const AVChannelLayout *a, const AVChannelLayout *b) { return !av_channel_layout_compare(a, b) || (KNOWN(a) && !KNOWN(b) && a->nb_channels == b->nb_channels) || (KNOWN(b) && !KNOWN(a) && b->nb_channels == a->nb_channels); } int ff_formats_check_channel_layouts(void *log, const AVFilterChannelLayouts *fmts) { unsigned i, j; if (!fmts) return 0; if (fmts->all_layouts < fmts->all_counts) { av_log(log, AV_LOG_ERROR, "Inconsistent generic list\n"); return AVERROR(EINVAL); } if (!fmts->all_layouts && !fmts->nb_channel_layouts) { av_log(log, AV_LOG_ERROR, "Empty channel layout list\n"); return AVERROR(EINVAL); } for (i = 0; i < fmts->nb_channel_layouts; i++) { for (j = i + 1; j < fmts->nb_channel_layouts; j++) { if (layouts_compatible(&fmts->channel_layouts[i], &fmts->channel_layouts[j])) { av_log(log, AV_LOG_ERROR, "Duplicated or redundant channel layout\n"); return AVERROR(EINVAL); } } } return 0; }