/*
* Filter layer - format negotiation
* Copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "formats.h"
#define KNOWN(l) (!FF_LAYOUT2COUNT(l)) /* for readability */
/**
* Add all refs from a to ret and destroy a.
*/
#define MERGE_REF(ret, a, fmts, type, fail) \
do { \
type ***tmp; \
int i; \
\
if (!(tmp = av_realloc(ret->refs, \
sizeof(*tmp) * (ret->refcount + a->refcount)))) \
goto fail; \
ret->refs = tmp; \
\
for (i = 0; i < a->refcount; i ++) { \
ret->refs[ret->refcount] = a->refs[i]; \
*ret->refs[ret->refcount++] = ret; \
} \
\
av_freep(&a->refs); \
av_freep(&a->fmts); \
av_freep(&a); \
} while (0)
/**
* Add all formats common for a and b to ret, copy the refs and destroy
* a and b.
*/
#define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail) \
do { \
int i, j, k = 0, count = FFMIN(a->nb, b->nb); \
\
if (!(ret = av_mallocz(sizeof(*ret)))) \
goto fail; \
\
if (count) { \
if (!(ret->fmts = av_malloc(sizeof(*ret->fmts) * count))) \
goto fail; \
for (i = 0; i < a->nb; i++) \
for (j = 0; j < b->nb; j++) \
if (a->fmts[i] == b->fmts[j]) { \
if(k >= FFMIN(a->nb, b->nb)){ \
av_log(NULL, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n"); \
av_free(ret->fmts); \
av_free(ret); \
return NULL; \
} \
ret->fmts[k++] = a->fmts[i]; \
} \
} \
ret->nb = k; \
/* check that there was at least one common format */ \
if (!ret->nb) \
goto fail; \
\
MERGE_REF(ret, a, fmts, type, fail); \
MERGE_REF(ret, b, fmts, type, fail); \
} while (0)
AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
enum AVMediaType type)
{
AVFilterFormats *ret = NULL;
int i, j;
int alpha1=0, alpha2=0;
int chroma1=0, chroma2=0;
if (a == b)
return a;
/* Do not lose chroma or alpha in merging.
It happens if both lists have formats with chroma (resp. alpha), but
the only formats in common do not have it (e.g. YUV+gray vs.
RGB+gray): in that case, the merging would select the gray format,
possibly causing a lossy conversion elsewhere in the graph.
To avoid that, pretend that there are no common formats to force the
insertion of a conversion filter. */
if (type == AVMEDIA_TYPE_VIDEO)
for (i = 0; i < a->nb_formats; i++)
for (j = 0; j < b->nb_formats; j++) {
const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]);
const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]);
alpha2 |= adesc->flags & bdesc->flags & AV_PIX_FMT_FLAG_ALPHA;
chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1;
if (a->formats[i] == b->formats[j]) {
alpha1 |= adesc->flags & AV_PIX_FMT_FLAG_ALPHA;
chroma1|= adesc->nb_components > 1;
}
}
// If chroma or alpha can be lost through merging then do not merge
if (alpha2 > alpha1 || chroma2 > chroma1)
return NULL;
MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail);
return ret;
fail:
if (ret) {
av_freep(&ret->refs);
av_freep(&ret->formats);
}
av_freep(&ret);
return NULL;
}
AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a,
AVFilterFormats *b)
{
AVFilterFormats *ret = NULL;
if (a == b) return a;
if (a->nb_formats && b->nb_formats) {
MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail);
} else if (a->nb_formats) {
MERGE_REF(a, b, formats, AVFilterFormats, fail);
ret = a;
} else {
MERGE_REF(b, a, formats, AVFilterFormats, fail);
ret = b;
}
return ret;
fail:
if (ret) {
av_freep(&ret->refs);
av_freep(&ret->formats);
}
av_freep(&ret);
return NULL;
}
AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a,
AVFilterChannelLayouts *b)
{
AVFilterChannelLayouts *ret = NULL;
unsigned a_all = a->all_layouts + a->all_counts;
unsigned b_all = b->all_layouts + b->all_counts;
int ret_max, ret_nb = 0, i, j, round;
if (a == b) return a;
/* Put the most generic set in a, to avoid doing everything twice */
if (a_all < b_all) {
FFSWAP(AVFilterChannelLayouts *, a, b);
FFSWAP(unsigned, a_all, b_all);
}
if (a_all) {
if (a_all == 1 && !b_all) {
/* keep only known layouts in b; works also for b_all = 1 */
for (i = j = 0; i < b->nb_channel_layouts; i++)
if (KNOWN(b->channel_layouts[i]))
b->channel_layouts[j++] = b->channel_layouts[i];
/* Not optimal: the unknown layouts of b may become known after
another merge. */
if (!j)
return NULL;
b->nb_channel_layouts = j;
}
MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, fail);
return b;
}
ret_max = a->nb_channel_layouts + b->nb_channel_layouts;
if (!(ret = av_mallocz(sizeof(*ret))) ||
!(ret->channel_layouts = av_malloc(sizeof(*ret->channel_layouts) *
ret_max)))
goto fail;
/* a[known] intersect b[known] */
for (i = 0; i < a->nb_channel_layouts; i++) {
if (!KNOWN(a->channel_layouts[i]))
continue;
for (j = 0; j < b->nb_channel_layouts; j++) {
if (a->channel_layouts[i] == b->channel_layouts[j]) {
ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
a->channel_layouts[i] = b->channel_layouts[j] = 0;
}
}
}
/* 1st round: a[known] intersect b[generic]
2nd round: a[generic] intersect b[known] */
for (round = 0; round < 2; round++) {
for (i = 0; i < a->nb_channel_layouts; i++) {
uint64_t fmt = a->channel_layouts[i], bfmt;
if (!fmt || !KNOWN(fmt))
continue;
bfmt = FF_COUNT2LAYOUT(av_get_channel_layout_nb_channels(fmt));
for (j = 0; j < b->nb_channel_layouts; j++)
if (b->channel_layouts[j] == bfmt)
ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
}
/* 1st round: swap to prepare 2nd round; 2nd round: put it back */
FFSWAP(AVFilterChannelLayouts *, a, b);
}
/* a[generic] intersect b[generic] */
for (i = 0; i < a->nb_channel_layouts; i++) {
if (KNOWN(a->channel_layouts[i]))
continue;
for (j = 0; j < b->nb_channel_layouts; j++)
if (a->channel_layouts[i] == b->channel_layouts[j])
ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
}
ret->nb_channel_layouts = ret_nb;
if (!ret->nb_channel_layouts)
goto fail;
MERGE_REF(ret, a, channel_layouts, AVFilterChannelLayouts, fail);
MERGE_REF(ret, b, channel_layouts, AVFilterChannelLayouts, fail);
return ret;
fail:
if (ret) {
av_freep(&ret->refs);
av_freep(&ret->channel_layouts);
}
av_freep(&ret);
return NULL;
}
int ff_fmt_is_in(int fmt, const int *fmts)
{
const int *p;
for (p = fmts; *p != -1; p++) {
if (fmt == *p)
return 1;
}
return 0;
}
#define COPY_INT_LIST(list_copy, list, type) { \
int count = 0; \
if (list) \
for (count = 0; list[count] != -1; count++) \
; \
list_copy = av_calloc(count+1, sizeof(type)); \
if (list_copy) { \
memcpy(list_copy, list, sizeof(type) * count); \
list_copy[count] = -1; \
} \
}
#define MAKE_FORMAT_LIST(type, field, count_field) \
type *formats; \
int count = 0; \
if (fmts) \
for (count = 0; fmts[count] != -1; count++) \
; \
formats = av_mallocz(sizeof(*formats)); \
if (!formats) return NULL; \
formats->count_field = count; \
if (count) { \
formats->field = av_malloc(sizeof(*formats->field)*count); \
if (!formats->field) { \
av_free(formats); \
return NULL; \
} \
}
AVFilterFormats *ff_make_format_list(const int *fmts)
{
MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats);
while (count--)
formats->formats[count] = fmts[count];
return formats;
}
AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts)
{
MAKE_FORMAT_LIST(AVFilterChannelLayouts,
channel_layouts, nb_channel_layouts);
if (count)
memcpy(formats
->channel_layouts
, fmts
, sizeof(*formats->channel_layouts) * count);
return formats;
}
#define ADD_FORMAT(f, fmt, type, list, nb) \
do { \
type *fmts; \
\
if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) \
return AVERROR(ENOMEM); \
\
fmts = av_realloc((*f)->list, \
sizeof(*(*f)->list) * ((*f)->nb + 1));\
if (!fmts) \
return AVERROR(ENOMEM); \
\
(*f)->list = fmts; \
(*f)->list[(*f)->nb++] = fmt; \
} while (0)
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
{
ADD_FORMAT(avff, fmt, int, formats, nb_formats);
return 0;
}
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
{
av_assert1(!(*l && (*l)->all_layouts));
ADD_FORMAT(l, channel_layout, uint64_t, channel_layouts, nb_channel_layouts);
return 0;
}
AVFilterFormats *ff_all_formats(enum AVMediaType type)
{
AVFilterFormats *ret = NULL;
int fmt;
int num_formats = type == AVMEDIA_TYPE_VIDEO ? AV_PIX_FMT_NB :
type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
for (fmt = 0; fmt < num_formats; fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if ((type != AVMEDIA_TYPE_VIDEO) ||
(type == AVMEDIA_TYPE_VIDEO && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)))
ff_add_format(&ret, fmt);
}
return ret;
}
const int64_t avfilter_all_channel_layouts[] = {
#include "all_channel_layouts.inc"
-1
};
// AVFilterFormats *avfilter_make_all_channel_layouts(void)
// {
// return avfilter_make_format64_list(avfilter_all_channel_layouts);
// }
AVFilterFormats *ff_planar_sample_fmts(void)
{
AVFilterFormats *ret = NULL;
int fmt;
for (fmt = 0; fmt < AV_SAMPLE_FMT_NB; fmt++)
if (av_sample_fmt_is_planar(fmt))
ff_add_format(&ret, fmt);
return ret;
}
AVFilterFormats *ff_all_samplerates(void)
{
AVFilterFormats *ret = av_mallocz(sizeof(*ret));
return ret;
}
AVFilterChannelLayouts *ff_all_channel_layouts(void)
{
AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
if (!ret)
return NULL;
ret->all_layouts = 1;
return ret;
}
AVFilterChannelLayouts *ff_all_channel_counts(void)
{
AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
if (!ret)
return NULL;
ret->all_layouts = ret->all_counts = 1;
return ret;
}
#define FORMATS_REF(f, ref) \
do { \
*ref = f; \
f->refs = av_realloc(f->refs, sizeof(*f->refs) * ++f->refcount); \
f->refs[f->refcount-1] = ref; \
} while (0)
void ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
{
FORMATS_REF(f, ref);
}
void ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
{
FORMATS_REF(f, ref);
}
#define FIND_REF_INDEX(ref, idx) \
do { \
int i; \
for (i = 0; i < (*ref)->refcount; i ++) \
if((*ref)->refs[i] == ref) { \
idx = i; \
break; \
} \
} while (0)
#define FORMATS_UNREF(ref, list) \
do { \
int idx = -1; \
\
if (!*ref) \
return; \
\
FIND_REF_INDEX(ref, idx); \
\
if (idx >= 0) \
memmove((*ref)->refs + idx, (*ref)->refs + idx + 1, \
sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \
\
if(!--(*ref)->refcount) { \
av_free((*ref)->list); \
av_free((*ref)->refs); \
av_free(*ref); \
} \
*ref = NULL; \
} while (0)
void ff_formats_unref(AVFilterFormats **ref)
{
FORMATS_UNREF(ref, formats);
}
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
{
FORMATS_UNREF(ref, channel_layouts);
}
#define FORMATS_CHANGEREF(oldref, newref) \
do { \
int idx = -1; \
\
FIND_REF_INDEX(oldref, idx); \
\
if (idx >= 0) { \
(*oldref)->refs[idx] = newref; \
*newref = *oldref; \
*oldref = NULL; \
} \
} while (0)
void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref,
AVFilterChannelLayouts **newref)
{
FORMATS_CHANGEREF(oldref, newref);
}
void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
{
FORMATS_CHANGEREF(oldref, newref);
}
#define SET_COMMON_FORMATS(ctx, fmts, in_fmts, out_fmts, ref, list) \
{ \
int count = 0, i; \
\
for (i = 0; i < ctx->nb_inputs; i++) { \
if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) { \
ref(fmts, &ctx->inputs[i]->out_fmts); \
count++; \
} \
} \
for (i = 0; i < ctx->nb_outputs; i++) { \
if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) { \
ref(fmts, &ctx->outputs[i]->in_fmts); \
count++; \
} \
} \
\
if (!count) { \
av_freep(&fmts->list); \
av_freep(&fmts->refs); \
av_freep(&fmts); \
} \
}
void ff_set_common_channel_layouts(AVFilterContext *ctx,
AVFilterChannelLayouts *layouts)
{
SET_COMMON_FORMATS(ctx, layouts, in_channel_layouts, out_channel_layouts,
ff_channel_layouts_ref, channel_layouts);
}
void ff_set_common_samplerates(AVFilterContext *ctx,
AVFilterFormats *samplerates)
{
SET_COMMON_FORMATS(ctx, samplerates, in_samplerates, out_samplerates,
ff_formats_ref, formats);
}
/**
* A helper for query_formats() which sets all links to the same list of
* formats. If there are no links hooked to this filter, the list of formats is
* freed.
*/
void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
{
SET_COMMON_FORMATS(ctx, formats, in_formats, out_formats,
ff_formats_ref, formats);
}
static int default_query_formats_common(AVFilterContext *ctx,
AVFilterChannelLayouts *(layouts)(void))
{
enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
AVMEDIA_TYPE_VIDEO;
ff_set_common_formats(ctx, ff_all_formats(type));
if (type == AVMEDIA_TYPE_AUDIO) {
ff_set_common_channel_layouts(ctx, layouts());
ff_set_common_samplerates(ctx, ff_all_samplerates());
}
return 0;
}
int ff_default_query_formats(AVFilterContext *ctx)
{
return default_query_formats_common(ctx, ff_all_channel_layouts);
}
int ff_query_formats_all(AVFilterContext *ctx)
{
return default_query_formats_common(ctx, ff_all_channel_counts);
}
/* internal functions for parsing audio format arguments */
int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx)
{
char *tail;
int pix_fmt = av_get_pix_fmt(arg);
if (pix_fmt == AV_PIX_FMT_NONE) {
pix_fmt
= strtol(arg
, &tail
, 0); if (*tail || (unsigned)pix_fmt >= AV_PIX_FMT_NB) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg);
return AVERROR(EINVAL);
}
}
*ret = pix_fmt;
return 0;
}
int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx)
{
char *tail;
int sfmt = av_get_sample_fmt(arg);
if (sfmt == AV_SAMPLE_FMT_NONE) {
if (*tail || (unsigned)sfmt >= AV_SAMPLE_FMT_NB) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
return AVERROR(EINVAL);
}
}
*ret = sfmt;
return 0;
}
int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx)
{
AVRational r;
if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0 ||r.den<=0) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg);
return AVERROR(EINVAL);
}
*ret = r;
return 0;
}
int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
{
char *tail;
double srate = av_strtod(arg, &tail);
if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg);
return AVERROR(EINVAL);
}
*ret = srate;
return 0;
}
int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx)
{
char *tail;
int64_t chlayout = av_get_channel_layout(arg);
if (chlayout == 0) {
chlayout
= strtol(arg
, &tail
, 10); if (*tail || chlayout == 0) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
return AVERROR(EINVAL);
}
}
*ret = chlayout;
return 0;
}
#ifdef TEST
#undef printf
int main(void)
{
const int64_t *cl;
char buf[512];
for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
}
return 0;
}
#endif