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/*

 * Copyright 2011 Stefano Sabatini | stefasab at 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

 */

/**

 * @file

 * libavcodec/libavfilter gluing utilities

 */

#include "avcodec.h"

#include "libavutil/avassert.h"

#include "libavutil/channel_layout.h"

#include "libavutil/opt.h"

#if FF_API_AVFILTERBUFFER

AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,

                                                            int perms)

{

    AVFilterBufferRef *picref =

        avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,

                                                  frame->width, frame->height,

                                                  frame->format);

    if (!picref)

        return NULL;

    if (avfilter_copy_frame_props(picref, frame) < 0) {

        picref->buf->data[0] = NULL;

        avfilter_unref_bufferp(&picref);

    }

    return picref;

}

AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,

                                                            int perms)

{

    AVFilterBufferRef *samplesref;

    int channels = av_frame_get_channels(frame);

    int64_t layout = av_frame_get_channel_layout(frame);

    if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) {

        av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");

        return NULL;

    }

    samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels(

        (uint8_t **)frame->extended_data, frame->linesize[0], perms,

        frame->nb_samples, frame->format, channels, layout);

    if (!samplesref)

        return NULL;

    if (avfilter_copy_frame_props(samplesref, frame) < 0) {

        samplesref->buf->data[0] = NULL;

        avfilter_unref_bufferp(&samplesref);

    }

    return samplesref;

}

AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,

                                                      const AVFrame *frame,

                                                      int perms)

{

    switch (type) {

    case AVMEDIA_TYPE_VIDEO:

        return avfilter_get_video_buffer_ref_from_frame(frame, perms);

    case AVMEDIA_TYPE_AUDIO:

        return avfilter_get_audio_buffer_ref_from_frame(frame, perms);

    default:

        return NULL;

    }

}

int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)

{

    int planes, nb_channels;

    if (!dst)

        return AVERROR(EINVAL);

    /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */

    av_assert0(src);

    memcpy(dst->data, src->data, sizeof(dst->data));

    memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));

    dst->pts     = src->pts;

    dst->format  = src->format;

    av_frame_set_pkt_pos(dst, src->pos);

    switch (src->type) {

    case AVMEDIA_TYPE_VIDEO:

        av_assert0(src->video);

        dst->width               = src->video->w;

        dst->height              = src->video->h;

        dst->sample_aspect_ratio = src->video->sample_aspect_ratio;

        dst->interlaced_frame    = src->video->interlaced;

        dst->top_field_first     = src->video->top_field_first;

        dst->key_frame           = src->video->key_frame;

        dst->pict_type           = src->video->pict_type;

        break;

    case AVMEDIA_TYPE_AUDIO:

        av_assert0(src->audio);

        nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);

        planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;

        if (planes > FF_ARRAY_ELEMS(dst->data)) {

            dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));

            if (!dst->extended_data)

                return AVERROR(ENOMEM);

            memcpy(dst->extended_data, src->extended_data,

                   planes * sizeof(*dst->extended_data));

        } else

            dst->extended_data = dst->data;

        dst->nb_samples          = src->audio->nb_samples;

        av_frame_set_sample_rate   (dst, src->audio->sample_rate);

        av_frame_set_channel_layout(dst, src->audio->channel_layout);

        av_frame_set_channels      (dst, src->audio->channels);

        break;

    default:

        return AVERROR(EINVAL);

    }

    return 0;

}

#endif

#if FF_API_FILL_FRAME

int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,

                                              const AVFilterBufferRef *samplesref)

{

    return avfilter_copy_buf_props(frame, samplesref);

}

int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,

                                              const AVFilterBufferRef *picref)

{

    return avfilter_copy_buf_props(frame, picref);

}

int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,

                                        const AVFilterBufferRef *ref)

{

    return avfilter_copy_buf_props(frame, ref);

}

#endif