diff options
Diffstat (limited to 'libavfilter/formats.c')
-rw-r--r-- | libavfilter/formats.c | 340 |
1 files changed, 305 insertions, 35 deletions
diff --git a/libavfilter/formats.c b/libavfilter/formats.c index 24a4fab..8160429 100644 --- a/libavfilter/formats.c +++ b/libavfilter/formats.c @@ -2,29 +2,35 @@ * Filter layer - format negotiation * Copyright (c) 2007 Bobby Bingham * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * 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. */ @@ -33,8 +39,8 @@ do { \ type ***tmp; \ int i; \ \ - if (!(tmp = av_realloc(ret->refs, \ - sizeof(*tmp) * (ret->refcount + a->refcount)))) \ + if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \ + sizeof(*tmp)))) \ goto fail; \ ret->refs = tmp; \ \ @@ -60,15 +66,21 @@ do { goto fail; \ \ if (count) { \ - if (!(ret->fmts = av_malloc(sizeof(*ret->fmts) * 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 (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; \ + } \ } \ + ret->nb = k; \ /* check that there was at least one common format */ \ if (!ret->nb) \ goto fail; \ @@ -77,13 +89,41 @@ do { MERGE_REF(ret, b, fmts, type, fail); \ } while (0) -AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b) +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; @@ -127,21 +167,81 @@ 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; - if (a->nb_channel_layouts && b->nb_channel_layouts) { - MERGE_FORMATS(ret, a, b, channel_layouts, nb_channel_layouts, - AVFilterChannelLayouts, fail); - } else if (a->nb_channel_layouts) { - MERGE_REF(a, b, channel_layouts, AVFilterChannelLayouts, fail); - ret = a; - } else { + /* 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); - ret = b; + 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); @@ -155,26 +255,58 @@ int ff_fmt_is_in(int fmt, const int *fmts) { const int *p; - for (p = fmts; *p != AV_PIX_FMT_NONE; p++) { + for (p = fmts; *p != -1; p++) { if (fmt == *p) return 1; } return 0; } +#define COPY_INT_LIST(list_copy, list, type) { \ + int count = 0; \ + if (list) \ + for (count = 0; list[count] != -1; count++) \ + ; \ + list_copy = av_calloc(count+1, sizeof(type)); \ + if (list_copy) { \ + memcpy(list_copy, list, sizeof(type) * count); \ + list_copy[count] = -1; \ + } \ +} + +#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_free(formats); \ + return NULL; \ + } \ + } + AVFilterFormats *ff_make_format_list(const int *fmts) { - AVFilterFormats *formats; - int count; + MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats); + while (count--) + formats->formats[count] = fmts[count]; - for (count = 0; fmts[count] != -1; count++) - ; + return formats; +} - formats = av_mallocz(sizeof(*formats)); +AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts) +{ + MAKE_FORMAT_LIST(AVFilterChannelLayouts, + channel_layouts, nb_channel_layouts); if (count) - formats->formats = av_malloc(sizeof(*formats->formats) * count); - formats->nb_formats = count; - memcpy(formats->formats, fmts, sizeof(*formats->formats) * count); + memcpy(formats->channel_layouts, fmts, + sizeof(*formats->channel_layouts) * count); return formats; } @@ -193,17 +325,19 @@ do { \ \ (*f)->list = fmts; \ (*f)->list[(*f)->nb++] = fmt; \ - return 0; \ } while (0) -int ff_add_format(AVFilterFormats **avff, int fmt) +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) @@ -227,12 +361,22 @@ AVFilterFormats *ff_all_formats(enum AVMediaType type) 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; fmt < AV_SAMPLE_FMT_NB; fmt++) + for (fmt = 0; av_get_bytes_per_sample(fmt)>0; fmt++) if (av_sample_fmt_is_planar(fmt)) ff_add_format(&ret, fmt); @@ -248,6 +392,18 @@ AVFilterFormats *ff_all_samplerates(void) 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; } @@ -338,13 +494,13 @@ void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref) int count = 0, i; \ \ for (i = 0; i < ctx->nb_inputs; i++) { \ - if (ctx->inputs[i]) { \ + if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) { \ ref(fmts, &ctx->inputs[i]->out_fmts); \ count++; \ } \ } \ for (i = 0; i < ctx->nb_outputs; i++) { \ - if (ctx->outputs[i]) { \ + if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) { \ ref(fmts, &ctx->outputs[i]->in_fmts); \ count++; \ } \ @@ -382,7 +538,8 @@ void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats) ff_formats_ref, formats); } -int ff_default_query_formats(AVFilterContext *ctx) +static int default_query_formats_common(AVFilterContext *ctx, + AVFilterChannelLayouts *(layouts)(void)) { enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : @@ -390,9 +547,122 @@ int ff_default_query_formats(AVFilterContext *ctx) ff_set_common_formats(ctx, ff_all_formats(type)); if (type == AVMEDIA_TYPE_AUDIO) { - ff_set_common_channel_layouts(ctx, ff_all_channel_layouts()); + ff_set_common_channel_layouts(ctx, layouts()); ff_set_common_samplerates(ctx, ff_all_samplerates()); } 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, count; + + if (nret) { + count = strtol(arg, &tail, 10); + if (*tail == 'c' && !tail[1] && count > 0 && count < 63) { + *nret = count; + *ret = 0; + return 0; + } + } + chlayout = av_get_channel_layout(arg); + if (chlayout == 0) { + chlayout = strtol(arg, &tail, 10); + if (*tail || chlayout == 0) { + av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg); + return AVERROR(EINVAL); + } + } + *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]; + + for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) { + av_get_channel_layout_string(buf, sizeof(buf), -1, *cl); + printf("%s\n", buf); + } + + return 0; +} + +#endif + |