/*
* 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/eval.h"
#include "libavutil/pixdesc.h"
#include "libavutil/audioconvert.h"
#include "avfilter.h"
#include "internal.h"
/**
* Add all refs from a to ret and destroy a.
*/
static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
{
int i;
for (i = 0; i < a->refcount; i++) {
ret->refs[ret->refcount] = a->refs[i];
*ret->refs[ret->refcount++] = ret;
}
av_free(a->refs);
av_free(a->formats);
av_free(a);
}
AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
{
AVFilterFormats *ret;
unsigned i, j, k = 0;
if (a == b) return a;
ret = av_mallocz(sizeof(AVFilterFormats));
/* merge list of formats */
ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count,
b->format_count));
for (i = 0; i < a->format_count; i++)
for (j = 0; j < b->format_count; j++)
if (a->formats[i] == b->formats[j]){
if(k >= FFMIN(a->format_count, b->format_count)){
av_log(0, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n");
av_free(ret->formats);
av_free(ret);
return NULL;
}
ret->formats[k++] = a->formats[i];
}
ret->format_count = k;
/* check that there was at least one common format */
if (!ret->format_count) {
av_free(ret->formats);
av_free(ret);
return NULL;
}
ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
merge_ref(ret, a);
merge_ref(ret, b);
return ret;
}
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() \
AVFilterFormats *formats; \
int count = 0; \
if (fmts) \
for (count = 0; fmts[count] != -1; count++) \
; \
formats = av_mallocz(sizeof(AVFilterFormats)); \
if (!formats) return NULL; \
formats->format_count = count; \
if (count) { \
formats->formats = av_malloc(sizeof(*formats->formats)*count); \
if (!formats->formats) { \
av_free(formats); \
return NULL; \
} \
}
AVFilterFormats *avfilter_make_format_list(const int *fmts)
{
MAKE_FORMAT_LIST();
while (count--)
formats->formats[count] = fmts[count];
return formats;
}
AVFilterFormats *avfilter_make_format64_list(const int64_t *fmts)
{
MAKE_FORMAT_LIST();
if (count)
memcpy(formats->formats, fmts, sizeof(*formats->formats) * count);
return formats;
}
int avfilter_add_format(AVFilterFormats **avff, int64_t fmt)
{
int64_t *fmts;
if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
return AVERROR(ENOMEM);
fmts = av_realloc((*avff)->formats,
sizeof(*(*avff)->formats) * ((*avff)->format_count+1));
if (!fmts)
return AVERROR(ENOMEM);
(*avff)->formats = fmts;
(*avff)->formats[(*avff)->format_count++] = fmt;
return 0;
}
#if FF_API_OLD_ALL_FORMATS_API
AVFilterFormats *avfilter_all_formats(enum AVMediaType type)
{
return avfilter_make_all_formats(type);
}
#endif
AVFilterFormats *avfilter_make_all_formats(enum AVMediaType type)
{
AVFilterFormats *ret = NULL;
int fmt;
int num_formats = type == AVMEDIA_TYPE_VIDEO ? PIX_FMT_NB :
type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
for (fmt = 0; fmt < num_formats; fmt++)
if ((type != AVMEDIA_TYPE_VIDEO) ||
(type == AVMEDIA_TYPE_VIDEO && !(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_HWACCEL)))
avfilter_add_format(&ret, fmt);
return ret;
}
const int64_t avfilter_all_channel_layouts[] = {
#include "all_channel_layouts.h"
-1
};
AVFilterFormats *avfilter_make_all_channel_layouts(void)
{
return avfilter_make_format64_list(avfilter_all_channel_layouts);
}
AVFilterFormats *avfilter_make_all_packing_formats(void)
{
static const int packing[] = {
AVFILTER_PACKED,
AVFILTER_PLANAR,
-1,
};
return avfilter_make_format_list(packing);
}
void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
{
*ref = f;
f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount);
f->refs[f->refcount-1] = ref;
}
static int find_ref_index(AVFilterFormats **ref)
{
int i;
for (i = 0; i < (*ref)->refcount; i++)
if ((*ref)->refs[i] == ref)
return i;
return -1;
}
void avfilter_formats_unref(AVFilterFormats **ref)
{
int idx;
if (!*ref)
return;
idx = find_ref_index(ref);
if (idx >= 0)
memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
if (!--(*ref)->refcount) {
av_free((*ref)->formats);
av_free((*ref)->refs);
av_free(*ref);
}
*ref = NULL;
}
void avfilter_formats_changeref(AVFilterFormats **oldref,
AVFilterFormats **newref)
{
int idx = find_ref_index(oldref);
if (idx >= 0) {
(*oldref)->refs[idx] = newref;
*newref = *oldref;
*oldref = NULL;
}
}
/* internal functions for parsing audio format arguments */
int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx)
{
char *tail;
int pix_fmt = av_get_pix_fmt(arg);
if (pix_fmt == PIX_FMT_NONE) {
pix_fmt = strtol(arg, &tail, 0);
if (*tail || (unsigned)pix_fmt >= 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) {
sfmt = strtol(arg, &tail, 0);
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_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;
}
int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx)
{
char *tail;
int planar = strtol(arg, &tail, 10);
if (*tail) {
planar = !strcmp(arg, "packed") ? 0:
!strcmp(arg, "planar") ? 1: -1;
}
if (planar != 0 && planar != 1) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid packing format '%s'\n", arg);
return AVERROR(EINVAL);
}
*ret = planar;
return 0;
}
#ifdef TEST
#undef printf
int main(void)
{
const int64_t *cl;
char buf[512];
for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
printf("%s\n", buf);
}
return 0;
}
#endif