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FFmpeg/libavfilter/formats.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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