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/*

 * Copyright 2007 Bobby Bingham

 * Copyright Stefano Sabatini 

 * Copyright Vitor Sessak 

 *

 * 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 

#include 

#include "libavutil/avassert.h"

#include "libavutil/buffer.h"

#include "libavutil/imgutils.h"

#include "libavutil/mem.h"

#include "avfilter.h"

#include "internal.h"

#include "video.h"

AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)

{

    return ff_get_video_buffer(link->dst->outputs[0], w, h);

}

/* TODO: set the buffer's priv member to a context structure for the whole

 * filter chain.  This will allow for a buffer pool instead of the constant

 * alloc & free cycle currently implemented. */

AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)

{

    AVFrame *frame = av_frame_alloc();

    int ret;

    if (!frame)

        return NULL;

    frame->width  = w;

    frame->height = h;

    frame->format = link->format;

    ret = av_frame_get_buffer(frame, 32);

    if (ret < 0)

        av_frame_free(&frame);

    return frame;

}

#if FF_API_AVFILTERBUFFER

AVFilterBufferRef *

avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,

                                          int w, int h, enum AVPixelFormat format)

{

    AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));

    AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));

    if (!pic || !picref)

        goto fail;

    picref->buf = pic;

    picref->buf->free = ff_avfilter_default_free_buffer;

    if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))

        goto fail;

    pic->w = picref->video->w = w;

    pic->h = picref->video->h = h;

    /* make sure the buffer gets read permission or it's useless for output */

    picref->perms = perms | AV_PERM_READ;

    pic->refcount = 1;

    picref->type = AVMEDIA_TYPE_VIDEO;

    pic->format = picref->format = format;

    memcpy(pic->data,        data,          4*sizeof(data[0]));

    memcpy(pic->linesize,    linesize,      4*sizeof(linesize[0]));

    memcpy(picref->data,     pic->data,     sizeof(picref->data));

    memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));

    pic->   extended_data = pic->data;

    picref->extended_data = picref->data;

    picref->pts = AV_NOPTS_VALUE;

    return picref;

fail:

    if (picref && picref->video)

        av_free(picref->video);

    av_free(picref);

    av_free(pic);

    return NULL;

}

#endif

AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)

{

    AVFrame *ret = NULL;

    av_unused char buf[16];

    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;

}