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/*
* Copyright 2007 Bobby Bingham
* Copyright Stefano Sabatini <stefasab gmail com>
* Copyright Vitor Sessak <vitor1001 gmail com>
*
* 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 <string.h>
#include <stdio.h>
#include "libavutil/buffer.h"
#include "libavutil/hwcontext.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#define BUFFER_ALIGN 32
AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
{
return ff_get_video_buffer(link->dst->outputs[0], w, h);
}
AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
{
AVFrame *frame = NULL;
int pool_width = 0;
int pool_height = 0;
int pool_align = 0;
enum AVPixelFormat pool_format = AV_PIX_FMT_NONE;
if (link->hw_frames_ctx &&
((AVHWFramesContext*)link->hw_frames_ctx->data)->format == link->format) {
int ret;
AVFrame *frame = av_frame_alloc();
if (!frame)
return NULL;
ret = av_hwframe_get_buffer(link->hw_frames_ctx, frame, 0);
if (ret < 0)
av_frame_free(&frame);
return frame;
}
if (!link->frame_pool) {
link->frame_pool = ff_frame_pool_video_init(av_buffer_allocz, w, h,
link->format, BUFFER_ALIGN);
if (!link->frame_pool)
return NULL;
} else {
if (ff_frame_pool_get_video_config(link->frame_pool,
&pool_width, &pool_height,
&pool_format, &pool_align) < 0) {
return NULL;
}
if (pool_width != w || pool_height != h ||
pool_format != link->format || pool_align != BUFFER_ALIGN) {
ff_frame_pool_uninit((FFFramePool **)&link->frame_pool);
link->frame_pool = ff_frame_pool_video_init(av_buffer_allocz, w, h,
link->format, BUFFER_ALIGN);
if (!link->frame_pool)
return NULL;
}
}
frame = ff_frame_pool_get(link->frame_pool);
if (!frame)
return NULL;
frame->sample_aspect_ratio = link->sample_aspect_ratio;
return frame;
}
AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
{
AVFrame *ret = NULL;
FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
if (link->dstpad->get_video_buffer)
ret = link->dstpad->get_video_buffer(link, w, h);
if (!ret)
ret = ff_default_get_video_buffer(link, w, h);
return ret;
}
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