/* * 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_AVFILTERBUFFERAVFilterBufferRef *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_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 #if FF_API_FILL_FRAMEint 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