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  1. /*
  2.  * Copyright 2011 Stefano Sabatini | stefasab at gmail.com
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. /**
  22.  * @file
  23.  * libavcodec/libavfilter gluing utilities
  24.  */
  25.  
  26. #include "avcodec.h"
  27. #include "libavutil/avassert.h"
  28. #include "libavutil/channel_layout.h"
  29. #include "libavutil/opt.h"
  30.  
  31. #if FF_API_AVFILTERBUFFER
  32. FF_DISABLE_DEPRECATION_WARNINGS
  33. AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
  34.                                                             int perms)
  35. {
  36.     AVFilterBufferRef *picref =
  37.         avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
  38.                                                   frame->width, frame->height,
  39.                                                   frame->format);
  40.     if (!picref)
  41.         return NULL;
  42.     if (avfilter_copy_frame_props(picref, frame) < 0) {
  43.         picref->buf->data[0] = NULL;
  44.         avfilter_unref_bufferp(&picref);
  45.     }
  46.     return picref;
  47. }
  48.  
  49. AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
  50.                                                             int perms)
  51. {
  52.     AVFilterBufferRef *samplesref;
  53.     int channels = av_frame_get_channels(frame);
  54.     int64_t layout = av_frame_get_channel_layout(frame);
  55.  
  56.     if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) {
  57.         av_log(NULL, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
  58.         return NULL;
  59.     }
  60.  
  61.     samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels(
  62.         (uint8_t **)frame->extended_data, frame->linesize[0], perms,
  63.         frame->nb_samples, frame->format, channels, layout);
  64.     if (!samplesref)
  65.         return NULL;
  66.     if (avfilter_copy_frame_props(samplesref, frame) < 0) {
  67.         samplesref->buf->data[0] = NULL;
  68.         avfilter_unref_bufferp(&samplesref);
  69.     }
  70.     return samplesref;
  71. }
  72.  
  73. AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,
  74.                                                       const AVFrame *frame,
  75.                                                       int perms)
  76. {
  77.     switch (type) {
  78.     case AVMEDIA_TYPE_VIDEO:
  79.         return avfilter_get_video_buffer_ref_from_frame(frame, perms);
  80.     case AVMEDIA_TYPE_AUDIO:
  81.         return avfilter_get_audio_buffer_ref_from_frame(frame, perms);
  82.     default:
  83.         return NULL;
  84.     }
  85. }
  86.  
  87. int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
  88. {
  89.     int planes, nb_channels;
  90.  
  91.     if (!dst)
  92.         return AVERROR(EINVAL);
  93.     /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */
  94.     av_assert0(src);
  95.  
  96.     memcpy(dst->data, src->data, sizeof(dst->data));
  97.     memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
  98.  
  99.     dst->pts     = src->pts;
  100.     dst->format  = src->format;
  101.     av_frame_set_pkt_pos(dst, src->pos);
  102.  
  103.     switch (src->type) {
  104.     case AVMEDIA_TYPE_VIDEO:
  105.         av_assert0(src->video);
  106.         dst->width               = src->video->w;
  107.         dst->height              = src->video->h;
  108.         dst->sample_aspect_ratio = src->video->sample_aspect_ratio;
  109.         dst->interlaced_frame    = src->video->interlaced;
  110.         dst->top_field_first     = src->video->top_field_first;
  111.         dst->key_frame           = src->video->key_frame;
  112.         dst->pict_type           = src->video->pict_type;
  113.         break;
  114.     case AVMEDIA_TYPE_AUDIO:
  115.         av_assert0(src->audio);
  116.         nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
  117.         planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
  118.  
  119.         if (planes > FF_ARRAY_ELEMS(dst->data)) {
  120.             dst->extended_data = av_mallocz_array(planes, sizeof(*dst->extended_data));
  121.             if (!dst->extended_data)
  122.                 return AVERROR(ENOMEM);
  123.             memcpy(dst->extended_data, src->extended_data,
  124.                    planes * sizeof(*dst->extended_data));
  125.         } else
  126.             dst->extended_data = dst->data;
  127.         dst->nb_samples          = src->audio->nb_samples;
  128.         av_frame_set_sample_rate   (dst, src->audio->sample_rate);
  129.         av_frame_set_channel_layout(dst, src->audio->channel_layout);
  130.         av_frame_set_channels      (dst, src->audio->channels);
  131.         break;
  132.     default:
  133.         return AVERROR(EINVAL);
  134.     }
  135.  
  136.     return 0;
  137. }
  138. FF_ENABLE_DEPRECATION_WARNINGS
  139. #endif
  140.