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/*
* Filter layer - format negotiation |
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* Copyright (c) 2007 Bobby Bingham |
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*
* 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
*/
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#include "libavutil/pixdesc.h" |
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#include "libavutil/audioconvert.h" |
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#include "avfilter.h"
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/**
* Add all refs from a to ret and destroy a.
*/ |
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static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
{
int i; |
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|
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for(i = 0; i < a->refcount; i ++) {
ret->refs[ret->refcount] = a->refs[i];
*ret->refs[ret->refcount++] = ret;
} |
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av_free(a->refs);
av_free(a->formats);
av_free(a); |
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}
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AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
{
AVFilterFormats *ret;
unsigned i, j, k = 0;
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if (a == b) return a;
|
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ret = av_mallocz(sizeof(AVFilterFormats));
/* merge list of formats */ |
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ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count,
b->format_count)); |
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for(i = 0; i < a->format_count; i ++)
for(j = 0; j < b->format_count; j ++)
if(a->formats[i] == b->formats[j])
ret->formats[k++] = a->formats[i];
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ret->format_count = k; |
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/* check that there was at least one common format */ |
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if(!ret->format_count) { |
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av_free(ret->formats);
av_free(ret);
return NULL;
}
ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount)); |
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merge_ref(ret, a);
merge_ref(ret, b); |
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return ret;
}
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#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; \
} \
}
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AVFilterFormats *avfilter_make_format_list(const int *fmts) |
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{ |
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MAKE_FORMAT_LIST();
while (count--)
formats->formats[count] = fmts[count]; |
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|
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return formats;
} |
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|
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AVFilterFormats *avfilter_make_format64_list(const int64_t *fmts)
{
MAKE_FORMAT_LIST();
if (count) |
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memcpy(formats->formats, fmts, sizeof(*formats->formats) * count); |
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return formats;
}
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int avfilter_add_format(AVFilterFormats **avff, int64_t fmt) |
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{ |
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int64_t *fmts; |
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|
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if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
return AVERROR(ENOMEM);
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fmts = av_realloc((*avff)->formats, |
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sizeof(*(*avff)->formats) * ((*avff)->format_count+1)); |
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if (!fmts) |
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return AVERROR(ENOMEM);
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(*avff)->formats = fmts;
(*avff)->formats[(*avff)->format_count++] = fmt; |
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return 0;
}
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AVFilterFormats *avfilter_all_formats(enum AVMediaType type) |
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{ |
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AVFilterFormats *ret = NULL; |
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int fmt; |
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int num_formats = type == AVMEDIA_TYPE_VIDEO ? PIX_FMT_NB : |
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type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0; |
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|
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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); |
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return ret; |
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}
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AVFilterFormats *avfilter_all_channel_layouts(void)
{
static int64_t chlayouts[] = {
AV_CH_LAYOUT_MONO,
AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_4POINT0,
AV_CH_LAYOUT_QUAD,
AV_CH_LAYOUT_5POINT0,
AV_CH_LAYOUT_5POINT0_BACK,
AV_CH_LAYOUT_5POINT1,
AV_CH_LAYOUT_5POINT1_BACK,
AV_CH_LAYOUT_5POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX,
AV_CH_LAYOUT_7POINT1,
AV_CH_LAYOUT_7POINT1_WIDE,
AV_CH_LAYOUT_7POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX,
-1,
};
return avfilter_make_format64_list(chlayouts);
}
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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;
}
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static int find_ref_index(AVFilterFormats **ref) |
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{
int i;
for(i = 0; i < (*ref)->refcount; i ++)
if((*ref)->refs[i] == ref)
return i;
return -1;
}
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void avfilter_formats_unref(AVFilterFormats **ref)
{ |
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int idx;
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if (!*ref)
return;
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idx = find_ref_index(ref); |
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if(idx >= 0) |
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memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
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if(!--(*ref)->refcount) {
av_free((*ref)->formats);
av_free((*ref)->refs);
av_free(*ref);
}
*ref = NULL;
}
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void avfilter_formats_changeref(AVFilterFormats **oldref,
AVFilterFormats **newref)
{ |
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int idx = find_ref_index(oldref); |
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if(idx >= 0) { |
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(*oldref)->refs[idx] = newref;
*newref = *oldref;
*oldref = NULL;
}
}
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