mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
930391e598
The API it is part of has been made private long ago (see commit
b74a1da49d).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
728 lines
28 KiB
C
728 lines
28 KiB
C
/*
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* Filter layer - format negotiation
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* Copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/eval.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "formats.h"
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#define KNOWN(l) (!FF_LAYOUT2COUNT(l)) /* for readability */
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/**
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* Add all refs from a to ret and destroy a.
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*/
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#define MERGE_REF(ret, a, fmts, type, fail_statement) \
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do { \
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type ***tmp; \
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int i; \
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\
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if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \
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sizeof(*tmp)))) \
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{ fail_statement } \
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ret->refs = tmp; \
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\
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for (i = 0; i < a->refcount; i ++) { \
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ret->refs[ret->refcount] = a->refs[i]; \
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*ret->refs[ret->refcount++] = ret; \
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} \
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\
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av_freep(&a->refs); \
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av_freep(&a->fmts); \
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av_freep(&a); \
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} while (0)
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/**
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* Add all formats common to a and b to a, add b's refs to a and destroy b.
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* If check is set, nothing is modified and it is only checked whether
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* the formats are compatible.
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* If empty_allowed is set and one of a,b->nb is zero, the lists are
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* merged; otherwise, it is treated as error.
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*/
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#define MERGE_FORMATS(a, b, fmts, nb, type, check, empty_allowed) \
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do { \
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int i, j, k = 0, skip = 0; \
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\
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if (empty_allowed) { \
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if (!a->nb || !b->nb) { \
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if (check) \
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return 1; \
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if (!a->nb) \
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FFSWAP(type *, a, b); \
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skip = 1; \
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} \
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} \
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if (!skip) { \
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for (i = 0; i < a->nb; i++) \
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for (j = 0; j < b->nb; j++) \
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if (a->fmts[i] == b->fmts[j]) { \
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if (check) \
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return 1; \
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a->fmts[k++] = a->fmts[i]; \
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break; \
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} \
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/* Check that there was at least one common format. \
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* Notice that both a and b are unchanged if not. */ \
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if (!k) \
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return 0; \
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av_assert2(!check); \
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a->nb = k; \
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} \
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\
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MERGE_REF(a, b, fmts, type, return AVERROR(ENOMEM);); \
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} while (0)
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static int merge_formats_internal(AVFilterFormats *a, AVFilterFormats *b,
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enum AVMediaType type, int check)
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{
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int i, j;
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int alpha1=0, alpha2=0;
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int chroma1=0, chroma2=0;
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if (a == b)
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return 1;
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/* Do not lose chroma or alpha in merging.
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It happens if both lists have formats with chroma (resp. alpha), but
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the only formats in common do not have it (e.g. YUV+gray vs.
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RGB+gray): in that case, the merging would select the gray format,
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possibly causing a lossy conversion elsewhere in the graph.
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To avoid that, pretend that there are no common formats to force the
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insertion of a conversion filter. */
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if (type == AVMEDIA_TYPE_VIDEO)
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for (i = 0; i < a->nb_formats; i++)
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for (j = 0; j < b->nb_formats; j++) {
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const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]);
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const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]);
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alpha2 |= adesc->flags & bdesc->flags & AV_PIX_FMT_FLAG_ALPHA;
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chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1;
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if (a->formats[i] == b->formats[j]) {
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alpha1 |= adesc->flags & AV_PIX_FMT_FLAG_ALPHA;
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chroma1|= adesc->nb_components > 1;
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}
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}
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// If chroma or alpha can be lost through merging then do not merge
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if (alpha2 > alpha1 || chroma2 > chroma1)
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return 0;
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MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, check, 0);
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return 1;
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}
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int ff_can_merge_formats(const AVFilterFormats *a, const AVFilterFormats *b,
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enum AVMediaType type)
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{
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return merge_formats_internal((AVFilterFormats *)a,
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(AVFilterFormats *)b, type, 1);
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}
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int ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
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enum AVMediaType type)
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{
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av_assert2(a->refcount && b->refcount);
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return merge_formats_internal(a, b, type, 0);
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}
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static int merge_samplerates_internal(AVFilterFormats *a,
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AVFilterFormats *b, int check)
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{
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if (a == b) return 1;
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MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, check, 1);
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return 1;
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}
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int ff_can_merge_samplerates(const AVFilterFormats *a, const AVFilterFormats *b)
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{
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return merge_samplerates_internal((AVFilterFormats *)a, (AVFilterFormats *)b, 1);
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}
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int ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b)
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{
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av_assert2(a->refcount && b->refcount);
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return merge_samplerates_internal(a, b, 0);
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}
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int ff_merge_channel_layouts(AVFilterChannelLayouts *a,
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AVFilterChannelLayouts *b)
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{
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uint64_t *channel_layouts;
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unsigned a_all = a->all_layouts + a->all_counts;
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unsigned b_all = b->all_layouts + b->all_counts;
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int ret_max, ret_nb = 0, i, j, round;
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av_assert2(a->refcount && b->refcount);
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if (a == b) return 1;
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/* Put the most generic set in a, to avoid doing everything twice */
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if (a_all < b_all) {
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FFSWAP(AVFilterChannelLayouts *, a, b);
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FFSWAP(unsigned, a_all, b_all);
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}
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if (a_all) {
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if (a_all == 1 && !b_all) {
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/* keep only known layouts in b; works also for b_all = 1 */
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for (i = j = 0; i < b->nb_channel_layouts; i++)
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if (KNOWN(b->channel_layouts[i]))
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b->channel_layouts[j++] = b->channel_layouts[i];
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/* Not optimal: the unknown layouts of b may become known after
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another merge. */
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if (!j)
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return 0;
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b->nb_channel_layouts = j;
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}
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MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, return AVERROR(ENOMEM););
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return 1;
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}
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ret_max = a->nb_channel_layouts + b->nb_channel_layouts;
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if (!(channel_layouts = av_malloc_array(ret_max, sizeof(*channel_layouts))))
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return AVERROR(ENOMEM);
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/* a[known] intersect b[known] */
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for (i = 0; i < a->nb_channel_layouts; i++) {
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if (!KNOWN(a->channel_layouts[i]))
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continue;
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for (j = 0; j < b->nb_channel_layouts; j++) {
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if (a->channel_layouts[i] == b->channel_layouts[j]) {
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channel_layouts[ret_nb++] = a->channel_layouts[i];
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a->channel_layouts[i] = b->channel_layouts[j] = 0;
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break;
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}
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}
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}
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/* 1st round: a[known] intersect b[generic]
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2nd round: a[generic] intersect b[known] */
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for (round = 0; round < 2; round++) {
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for (i = 0; i < a->nb_channel_layouts; i++) {
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uint64_t fmt = a->channel_layouts[i], bfmt;
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if (!fmt || !KNOWN(fmt))
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continue;
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bfmt = FF_COUNT2LAYOUT(av_get_channel_layout_nb_channels(fmt));
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for (j = 0; j < b->nb_channel_layouts; j++)
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if (b->channel_layouts[j] == bfmt)
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channel_layouts[ret_nb++] = a->channel_layouts[i];
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}
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/* 1st round: swap to prepare 2nd round; 2nd round: put it back */
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FFSWAP(AVFilterChannelLayouts *, a, b);
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}
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/* a[generic] intersect b[generic] */
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for (i = 0; i < a->nb_channel_layouts; i++) {
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if (KNOWN(a->channel_layouts[i]))
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continue;
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for (j = 0; j < b->nb_channel_layouts; j++)
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if (a->channel_layouts[i] == b->channel_layouts[j])
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channel_layouts[ret_nb++] = a->channel_layouts[i];
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}
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if (!ret_nb) {
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av_free(channel_layouts);
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return 0;
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}
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if (a->refcount > b->refcount)
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FFSWAP(AVFilterChannelLayouts *, a, b);
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MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts,
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{ av_free(channel_layouts); return AVERROR(ENOMEM); });
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av_freep(&b->channel_layouts);
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b->channel_layouts = channel_layouts;
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b->nb_channel_layouts = ret_nb;
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return 1;
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}
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int ff_fmt_is_in(int fmt, const int *fmts)
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{
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const int *p;
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for (p = fmts; *p != -1; p++) {
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if (fmt == *p)
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return 1;
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}
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return 0;
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}
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#define MAKE_FORMAT_LIST(type, field, count_field) \
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type *formats; \
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int count = 0; \
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if (fmts) \
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for (count = 0; fmts[count] != -1; count++) \
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; \
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formats = av_mallocz(sizeof(*formats)); \
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if (!formats) \
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return NULL; \
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formats->count_field = count; \
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if (count) { \
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formats->field = av_malloc_array(count, sizeof(*formats->field)); \
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if (!formats->field) { \
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av_freep(&formats); \
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return NULL; \
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} \
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}
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AVFilterFormats *ff_make_format_list(const int *fmts)
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{
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MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats);
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while (count--)
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formats->formats[count] = fmts[count];
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return formats;
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}
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AVFilterChannelLayouts *ff_make_format64_list(const int64_t *fmts)
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{
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MAKE_FORMAT_LIST(AVFilterChannelLayouts,
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channel_layouts, nb_channel_layouts);
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if (count)
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memcpy(formats->channel_layouts, fmts,
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sizeof(*formats->channel_layouts) * count);
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return formats;
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}
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#define ADD_FORMAT(f, fmt, unref_fn, type, list, nb) \
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do { \
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type *fmts; \
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\
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if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) { \
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return AVERROR(ENOMEM); \
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} \
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\
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fmts = av_realloc_array((*f)->list, (*f)->nb + 1, \
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sizeof(*(*f)->list)); \
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if (!fmts) { \
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unref_fn(f); \
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return AVERROR(ENOMEM); \
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} \
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\
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(*f)->list = fmts; \
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(*f)->list[(*f)->nb++] = fmt; \
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} while (0)
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int ff_add_format(AVFilterFormats **avff, int64_t fmt)
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{
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ADD_FORMAT(avff, fmt, ff_formats_unref, int, formats, nb_formats);
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return 0;
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}
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int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
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{
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av_assert1(!(*l && (*l)->all_layouts));
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ADD_FORMAT(l, channel_layout, ff_channel_layouts_unref, uint64_t, channel_layouts, nb_channel_layouts);
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return 0;
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}
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AVFilterFormats *ff_all_formats(enum AVMediaType type)
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{
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AVFilterFormats *ret = NULL;
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if (type == AVMEDIA_TYPE_VIDEO) {
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const AVPixFmtDescriptor *desc = NULL;
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while ((desc = av_pix_fmt_desc_next(desc))) {
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if (ff_add_format(&ret, av_pix_fmt_desc_get_id(desc)) < 0)
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return NULL;
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}
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} else if (type == AVMEDIA_TYPE_AUDIO) {
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enum AVSampleFormat fmt = 0;
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while (av_get_sample_fmt_name(fmt)) {
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if (ff_add_format(&ret, fmt) < 0)
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return NULL;
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fmt++;
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}
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}
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return ret;
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}
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int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
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{
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unsigned nb_formats, fmt, flags;
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AVFilterFormats *formats = NULL;
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while (1) {
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nb_formats = 0;
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for (fmt = 0;; fmt++) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
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if (!desc)
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break;
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flags = desc->flags;
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
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!(desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
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(desc->log2_chroma_w || desc->log2_chroma_h))
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flags |= FF_PIX_FMT_FLAG_SW_FLAT_SUB;
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if ((flags & (want | rej)) != want)
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continue;
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if (formats)
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formats->formats[nb_formats] = fmt;
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nb_formats++;
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}
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if (formats) {
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av_assert0(formats->nb_formats == nb_formats);
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*rfmts = formats;
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return 0;
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}
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formats = av_mallocz(sizeof(*formats));
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if (!formats)
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return AVERROR(ENOMEM);
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formats->nb_formats = nb_formats;
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if (nb_formats) {
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formats->formats = av_malloc_array(nb_formats, sizeof(*formats->formats));
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if (!formats->formats) {
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av_freep(&formats);
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return AVERROR(ENOMEM);
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}
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}
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}
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}
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AVFilterFormats *ff_planar_sample_fmts(void)
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{
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AVFilterFormats *ret = NULL;
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int fmt;
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for (fmt = 0; av_get_bytes_per_sample(fmt)>0; fmt++)
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if (av_sample_fmt_is_planar(fmt))
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if (ff_add_format(&ret, fmt) < 0)
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return NULL;
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return ret;
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}
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AVFilterFormats *ff_all_samplerates(void)
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{
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AVFilterFormats *ret = av_mallocz(sizeof(*ret));
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return ret;
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}
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AVFilterChannelLayouts *ff_all_channel_layouts(void)
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{
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AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
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if (!ret)
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return NULL;
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ret->all_layouts = 1;
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return ret;
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}
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AVFilterChannelLayouts *ff_all_channel_counts(void)
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{
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AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
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if (!ret)
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return NULL;
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ret->all_layouts = ret->all_counts = 1;
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return ret;
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}
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#define FORMATS_REF(f, ref, unref_fn) \
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void *tmp; \
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\
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if (!f) \
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return AVERROR(ENOMEM); \
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\
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tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1); \
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if (!tmp) { \
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unref_fn(&f); \
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return AVERROR(ENOMEM); \
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} \
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f->refs = tmp; \
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f->refs[f->refcount++] = ref; \
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*ref = f; \
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return 0
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int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
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{
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FORMATS_REF(f, ref, ff_channel_layouts_unref);
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}
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int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
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{
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FORMATS_REF(f, ref, ff_formats_unref);
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}
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#define FIND_REF_INDEX(ref, idx) \
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do { \
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int i; \
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for (i = 0; i < (*ref)->refcount; i ++) \
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if((*ref)->refs[i] == ref) { \
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idx = i; \
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break; \
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} \
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} while (0)
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#define FORMATS_UNREF(ref, list) \
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do { \
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int idx = -1; \
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\
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if (!*ref) \
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return; \
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\
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FIND_REF_INDEX(ref, idx); \
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\
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if (idx >= 0) { \
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memmove((*ref)->refs + idx, (*ref)->refs + idx + 1, \
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sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \
|
|
--(*ref)->refcount; \
|
|
} \
|
|
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, ref_fn, unref_fn) \
|
|
int count = 0, i; \
|
|
\
|
|
if (!fmts) \
|
|
return AVERROR(ENOMEM); \
|
|
\
|
|
for (i = 0; i < ctx->nb_inputs; i++) { \
|
|
if (ctx->inputs[i] && !ctx->inputs[i]->outcfg.fmts) { \
|
|
int ret = ref_fn(fmts, &ctx->inputs[i]->outcfg.fmts); \
|
|
if (ret < 0) { \
|
|
return ret; \
|
|
} \
|
|
count++; \
|
|
} \
|
|
} \
|
|
for (i = 0; i < ctx->nb_outputs; i++) { \
|
|
if (ctx->outputs[i] && !ctx->outputs[i]->incfg.fmts) { \
|
|
int ret = ref_fn(fmts, &ctx->outputs[i]->incfg.fmts); \
|
|
if (ret < 0) { \
|
|
return ret; \
|
|
} \
|
|
count++; \
|
|
} \
|
|
} \
|
|
\
|
|
if (!count) { \
|
|
unref_fn(&fmts); \
|
|
} \
|
|
\
|
|
return 0;
|
|
|
|
int ff_set_common_channel_layouts(AVFilterContext *ctx,
|
|
AVFilterChannelLayouts *channel_layouts)
|
|
{
|
|
SET_COMMON_FORMATS(ctx, channel_layouts,
|
|
ff_channel_layouts_ref, ff_channel_layouts_unref);
|
|
}
|
|
|
|
int ff_set_common_samplerates(AVFilterContext *ctx,
|
|
AVFilterFormats *samplerates)
|
|
{
|
|
SET_COMMON_FORMATS(ctx, samplerates,
|
|
ff_formats_ref, ff_formats_unref);
|
|
}
|
|
|
|
/**
|
|
* 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,
|
|
ff_formats_ref, ff_formats_unref);
|
|
}
|
|
|
|
int ff_default_query_formats(AVFilterContext *ctx)
|
|
{
|
|
int ret;
|
|
enum AVMediaType type = ctx->nb_inputs ? ctx->inputs [0]->type :
|
|
ctx->nb_outputs ? 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, ff_all_channel_counts());
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = ff_set_common_samplerates(ctx, ff_all_samplerates());
|
|
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(int64_t *ret, int *nret, const char *arg,
|
|
void *log_ctx)
|
|
{
|
|
int64_t chlayout;
|
|
int nb_channels;
|
|
|
|
if (av_get_extended_channel_layout(arg, &chlayout, &nb_channels) < 0) {
|
|
av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (!chlayout && !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 = 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);
|
|
}
|
|
|
|
static int layouts_compatible(uint64_t a, uint64_t b)
|
|
{
|
|
return a == b ||
|
|
(KNOWN(a) && !KNOWN(b) && av_get_channel_layout_nb_channels(a) == FF_LAYOUT2COUNT(b)) ||
|
|
(KNOWN(b) && !KNOWN(a) && av_get_channel_layout_nb_channels(b) == FF_LAYOUT2COUNT(a));
|
|
}
|
|
|
|
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;
|
|
}
|