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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 "avfilter.h"
AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
{
AVFilterFormats *ret;
unsigned i, j, k = 0;
ret = av_mallocz(sizeof(AVFilterFormats));
/* merge list of formats */
ret->formats = av_malloc(sizeof(int) * 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])
ret->formats[k++] = a->formats[i];
/* check that there was at least one common format */
if(!(ret->format_count = k)) {
av_free(ret->formats);
av_free(ret);
return NULL;
}
/* merge and update all the references */
ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
for(i = 0; i < a->refcount; i ++) {
ret->refs[ret->refcount] = a->refs[i];
*ret->refs[ret->refcount++] = ret;
}
for(i = 0; i < b->refcount; i ++) {
ret->refs[ret->refcount] = b->refs[i];
*ret->refs[ret->refcount++] = ret;
}
av_free(a->refs);
av_free(a->formats);
av_free(a);
av_free(b->refs);
av_free(b->formats);
av_free(b);
return ret;
}
AVFilterFormats *avfilter_make_format_list(int len, ...)
{
AVFilterFormats *ret;
int i;
va_list vl;
ret = av_mallocz(sizeof(AVFilterFormats));
ret->formats = av_malloc(sizeof(int) * len);
ret->format_count = len;
va_start(vl, len);
for(i = 0; i < len; i ++)
ret->formats[i] = va_arg(vl, int);
va_end(vl);
return ret;
}
AVFilterFormats *avfilter_all_colorspaces(void)
{
return avfilter_make_format_list(31,
PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P,
PIX_FMT_YUV411P, PIX_FMT_YUV410P,
PIX_FMT_YUYV422, PIX_FMT_UYVY422, PIX_FMT_UYYVYY411,
PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P,
PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
PIX_FMT_RGB32, PIX_FMT_BGR32,
PIX_FMT_RGB32_1, PIX_FMT_BGR32_1,
PIX_FMT_RGB24, PIX_FMT_BGR24,
PIX_FMT_RGB565, PIX_FMT_BGR565,
PIX_FMT_RGB555, PIX_FMT_BGR555,
PIX_FMT_RGB8, PIX_FMT_BGR8,
PIX_FMT_RGB4_BYTE,PIX_FMT_BGR4_BYTE,
PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
PIX_FMT_GRAY8, PIX_FMT_PAL8);
}
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;
}
void avfilter_formats_unref(AVFilterFormats **ref)
{
if(!--(*ref)->refcount) {
av_free((*ref)->formats);
av_free((*ref)->refs);
av_free(*ref);
}
*ref = NULL;
}
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