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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(NULL, 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_array(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
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