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FFmpeg/libavfilter/formats.c
Andreas Rheinhardt 41a558fea0 avfilter/formats: Constify channel_layout in ff_add_channel_layout() 
It copies, not moves the channel layout.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-05-19 20:20:38 +02:00

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/*
* 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 "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(void *va, void *vb)
{
AVFilterChannelLayouts *a = va;
AVFilterChannelLayouts *b = vb;
AVChannelLayout *channel_layouts;
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++)
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 (!(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])) {
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))
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]))
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 const AVFilterFormatsMerger mergers_video[] = {
{
.offset = offsetof(AVFilterFormatsConfig, formats),
.merge = merge_pix_fmts,
.can_merge = can_merge_pix_fmts,
},
};
static const AVFilterFormatsMerger mergers_audio[] = {
{
.offset = offsetof(AVFilterFormatsConfig, channel_layouts),
.merge = merge_channel_layouts,
.can_merge = NULL,
},
{
.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;
}
#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());
}
/**
* 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 = ctx->nb_inputs ? ctx->inputs [0]->type :
ctx->nb_outputs ? ctx->outputs[0]->type : AVMEDIA_TYPE_VIDEO;
formats = ff_all_formats(type);
break;
}
ret = ff_set_common_formats(ctx, formats);
if (ret < 0)
return ret;
if (type == AVMEDIA_TYPE_AUDIO) {
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) {
#if FF_API_OLD_CHANNEL_LAYOUT
int64_t mask;
int nb_channels;
FF_DISABLE_DEPRECATION_WARNINGS
if (av_get_extended_channel_layout(arg, &mask, &nb_channels) < 0) {
#endif
av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
return AVERROR(EINVAL);
#if FF_API_OLD_CHANNEL_LAYOUT
}
FF_ENABLE_DEPRECATION_WARNINGS
av_log(log_ctx, AV_LOG_WARNING, "Channel layout '%s' uses a deprecated syntax.\n",
arg);
if (mask)
av_channel_layout_from_mask(&chlayout, mask);
else
chlayout = (AVChannelLayout) { .order = AV_CHANNEL_ORDER_UNSPEC, .nb_channels = nb_channels };
#endif
}
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);
}
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;
}
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