/* * 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/pixdesc.h" #include "libavutil/parseutils.h" #include "avfilter.h" #include "internal.h" #include "formats.h" #define KNOWN(l) (!FF_LAYOUT2COUNT(l)) /* for readability */ /** * Add all refs from a to ret and destroy a. */ #define MERGE_REF(ret, a, fmts, type, fail) \ do { \ type ***tmp; \ int i; \ \ if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \ sizeof(*tmp)))) \ goto fail; \ 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 for a and b to ret, copy the refs and destroy * a and b. */ #define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail) \ do { \ int i, j, k = 0, count = FFMIN(a->nb, b->nb); \ \ if (!(ret = av_mallocz(sizeof(*ret)))) \ goto fail; \ \ if (count) { \ if (!(ret->fmts = av_malloc_array(count, sizeof(*ret->fmts)))) \ goto fail; \ for (i = 0; i < a->nb; i++) \ for (j = 0; j < b->nb; j++) \ if (a->fmts[i] == b->fmts[j]) { \ if(k >= FFMIN(a->nb, b->nb)){ \ av_log(NULL, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n"); \ av_free(ret->fmts); \ av_free(ret); \ return NULL; \ } \ ret->fmts[k++] = a->fmts[i]; \ } \ } \ ret->nb = k; \ /* check that there was at least one common format */ \ if (!ret->nb) \ goto fail; \ \ MERGE_REF(ret, a, fmts, type, fail); \ MERGE_REF(ret, b, fmts, type, fail); \ } while (0) AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type) { AVFilterFormats *ret = NULL; int i, j; int alpha1=0, alpha2=0; int chroma1=0, chroma2=0; if (a == b) return a; /* 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++) for (j = 0; j < b->nb_formats; j++) { const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]); 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 NULL; MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail); return ret; fail: if (ret) { av_freep(&ret->refs); av_freep(&ret->formats); } av_freep(&ret); return NULL; } AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b) { AVFilterFormats *ret = NULL; if (a == b) return a; if (a->nb_formats && b->nb_formats) { MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail); } else if (a->nb_formats) { MERGE_REF(a, b, formats, AVFilterFormats, fail); ret = a; } else { MERGE_REF(b, a, formats, AVFilterFormats, fail); ret = b; } return ret; fail: if (ret) { av_freep(&ret->refs); av_freep(&ret->formats); } av_freep(&ret); return NULL; } AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a, AVFilterChannelLayouts *b) { AVFilterChannelLayouts *ret = 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; if (a == b) return a; /* 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])) b->channel_layouts[j++] = b->channel_layouts[i]; /* Not optimal: the unknown layouts of b may become known after another merge. */ if (!j) return NULL; b->nb_channel_layouts = j; } MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, fail); return b; } ret_max = a->nb_channel_layouts + b->nb_channel_layouts; if (!(ret = av_mallocz(sizeof(*ret))) || !(ret->channel_layouts = av_malloc_array(ret_max, sizeof(*ret->channel_layouts)))) goto fail; /* 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 (a->channel_layouts[i] == b->channel_layouts[j]) { ret->channel_layouts[ret_nb++] = a->channel_layouts[i]; a->channel_layouts[i] = b->channel_layouts[j] = 0; } } } /* 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++) { uint64_t fmt = a->channel_layouts[i], bfmt; if (!fmt || !KNOWN(fmt)) continue; bfmt = FF_COUNT2LAYOUT(av_get_channel_layout_nb_channels(fmt)); for (j = 0; j < b->nb_channel_layouts; j++) if (b->channel_layouts[j] == bfmt) ret->channel_layouts[ret_nb++] = a->channel_layouts[i]; } /* 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 (a->channel_layouts[i] == b->channel_layouts[j]) ret->channel_layouts[ret_nb++] = a->channel_layouts[i]; } ret->nb_channel_layouts = ret_nb; if (!ret->nb_channel_layouts) goto fail; MERGE_REF(ret, a, channel_layouts, AVFilterChannelLayouts, fail); MERGE_REF(ret, b, channel_layouts, AVFilterChannelLayouts, fail); return ret; fail: if (ret) { av_freep(&ret->refs); av_freep(&ret->channel_layouts); } av_freep(&ret); 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 *avfilter_make_format64_list(const int64_t *fmts) { MAKE_FORMAT_LIST(AVFilterChannelLayouts, channel_layouts, nb_channel_layouts); if (count) memcpy(formats->channel_layouts, fmts, sizeof(*formats->channel_layouts) * count); return formats; } #define ADD_FORMAT(f, fmt, type, list, nb) \ do { \ type *fmts; \ void *oldf = *f; \ \ if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) \ return AVERROR(ENOMEM); \ \ fmts = av_realloc_array((*f)->list, (*f)->nb + 1, \ sizeof(*(*f)->list)); \ if (!fmts) { \ if (!oldf) \ av_freep(f); \ return AVERROR(ENOMEM); \ } \ \ (*f)->list = fmts; \ (*f)->list[(*f)->nb++] = fmt; \ } while (0) int ff_add_format(AVFilterFormats **avff, int64_t fmt) { ADD_FORMAT(avff, fmt, int, formats, nb_formats); return 0; } int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout) { av_assert1(!(*l && (*l)->all_layouts)); ADD_FORMAT(l, channel_layout, uint64_t, channel_layouts, nb_channel_layouts); return 0; } AVFilterFormats *ff_all_formats(enum AVMediaType type) { AVFilterFormats *ret = NULL; if (type == AVMEDIA_TYPE_VIDEO) { const AVPixFmtDescriptor *desc = NULL; while ((desc = av_pix_fmt_desc_next(desc))) { if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) ff_add_format(&ret, av_pix_fmt_desc_get_id(desc)); } } else if (type == AVMEDIA_TYPE_AUDIO) { enum AVSampleFormat fmt = 0; while (av_get_sample_fmt_name(fmt)) { ff_add_format(&ret, fmt); fmt++; } } return ret; } const int64_t avfilter_all_channel_layouts[] = { #include "all_channel_layouts.inc" -1 }; // AVFilterFormats *avfilter_make_all_channel_layouts(void) // { // return avfilter_make_format64_list(avfilter_all_channel_layouts); // } 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)) ff_add_format(&ret, fmt); 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; } #define FORMATS_REF(f, ref) \ void *tmp; \ \ if (!ref) \ return AVERROR_BUG; \ \ tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1); \ if (!tmp) \ 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); } int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref) { FORMATS_REF(f, ref); } #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)); \ \ if(!--(*ref)->refcount) { \ av_free((*ref)->list); \ av_free((*ref)->refs); \ av_free(*ref); \ } \ *ref = NULL; \ } while (0) void ff_formats_unref(AVFilterFormats **ref) { FORMATS_UNREF(ref, formats); } 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, in_fmts, out_fmts, ref, list) \ int count = 0, i; \ \ if (!fmts) \ return AVERROR_BUG; \ \ for (i = 0; i < ctx->nb_inputs; i++) { \ if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) { \ int ret = ref(fmts, &ctx->inputs[i]->out_fmts); \ if (ret < 0) \ return ret; \ count++; \ } \ } \ for (i = 0; i < ctx->nb_outputs; i++) { \ if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) { \ int ret = ref(fmts, &ctx->outputs[i]->in_fmts); \ if (ret < 0) \ return ret; \ count++; \ } \ } \ \ if (!count) { \ av_freep(&fmts->list); \ av_freep(&fmts->refs); \ av_freep(&fmts); \ } \ \ return 0; int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts) { SET_COMMON_FORMATS(ctx, layouts, in_channel_layouts, out_channel_layouts, ff_channel_layouts_ref, channel_layouts); } int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates) { SET_COMMON_FORMATS(ctx, samplerates, in_samplerates, out_samplerates, ff_formats_ref, formats); } /** * 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, in_formats, out_formats, ff_formats_ref, formats); } static int default_query_formats_common(AVFilterContext *ctx, AVFilterChannelLayouts *(layouts)(void)) { int ret; enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : AVMEDIA_TYPE_VIDEO; ret = ff_set_common_formats(ctx, ff_all_formats(type)); if (ret < 0) return ret; if (type == AVMEDIA_TYPE_AUDIO) { ret = ff_set_common_channel_layouts(ctx, layouts()); if (ret < 0) return ret; ret = ff_set_common_samplerates(ctx, ff_all_samplerates()); if (ret < 0) return ret; } return 0; } int ff_default_query_formats(AVFilterContext *ctx) { return default_query_formats_common(ctx, ff_all_channel_layouts); } int ff_query_formats_all(AVFilterContext *ctx) { return default_query_formats_common(ctx, ff_all_channel_counts); } /* 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_format(int *ret, const char *arg, void *log_ctx) { char *tail; int sfmt = av_get_sample_fmt(arg); if (sfmt == AV_SAMPLE_FMT_NONE) { sfmt = strtol(arg, &tail, 0); if (*tail || av_get_bytes_per_sample(sfmt)<=0) { av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg); return AVERROR(EINVAL); } } *ret = sfmt; return 0; } int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx) { AVRational r; if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0 ||r.den<=0) { av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg); return AVERROR(EINVAL); } *ret = r; 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(int64_t *ret, int *nret, const char *arg, void *log_ctx) { char *tail; int64_t chlayout; chlayout = av_get_channel_layout(arg); if (chlayout == 0) { chlayout = strtol(arg, &tail, 10); if (!(*tail == '\0' || *tail == 'c' && *(tail + 1) == '\0') || chlayout <= 0 || chlayout > 63) { av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg); return AVERROR(EINVAL); } if (nret) { *nret = chlayout; *ret = 0; return 0; } } *ret = chlayout; if (nret) *nret = av_get_channel_layout_nb_channels(chlayout); return 0; } #ifdef TEST #undef printf int main(void) { const int64_t *cl; char buf[512]; int i; const char *teststrings[] ={ "blah", "1", "2", "-1", "60", "65", "1c", "2c", "-1c", "60c", "65c", "5.1", "stereo", "1+1+1+1", "1c+1c+1c+1c", "2c+1c", "0x3", }; for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) { av_get_channel_layout_string(buf, sizeof(buf), -1, *cl); printf("%s\n", buf); } for ( i = 0; i<FF_ARRAY_ELEMS(teststrings); i++) { int64_t layout = -1; int count = -1; int ret; ret = ff_parse_channel_layout(&layout, &count, teststrings[i], NULL); printf ("%d = ff_parse_channel_layout(%016"PRIX64", %2d, %s);\n", ret ? -1 : 0, layout, count, teststrings[i]); } return 0; } #endif