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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. AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
  33.                                                             int perms)
  34. {
  35.     AVFilterBufferRef *picref =
  36.         avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
  37.                                                   frame->width, frame->height,
  38.                                                   frame->format);
  39.     if (!picref)
  40.         return NULL;
  41.     if (avfilter_copy_frame_props(picref, frame) < 0) {
  42.         picref->buf->data[0] = NULL;
  43.         avfilter_unref_bufferp(&picref);
  44.     }
  45.     return picref;
  46. }
  47.  
  48. AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
  49.                                                             int perms)
  50. {
  51.     AVFilterBufferRef *samplesref;
  52.     int channels = av_frame_get_channels(frame);
  53.     int64_t layout = av_frame_get_channel_layout(frame);
  54.  
  55.     if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) {
  56.         av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
  57.         return NULL;
  58.     }
  59.  
  60.     samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels(
  61.         (uint8_t **)frame->extended_data, frame->linesize[0], perms,
  62.         frame->nb_samples, frame->format, channels, layout);
  63.     if (!samplesref)
  64.         return NULL;
  65.     if (avfilter_copy_frame_props(samplesref, frame) < 0) {
  66.         samplesref->buf->data[0] = NULL;
  67.         avfilter_unref_bufferp(&samplesref);
  68.     }
  69.     return samplesref;
  70. }
  71.  
  72. AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,
  73.                                                       const AVFrame *frame,
  74.                                                       int perms)
  75. {
  76.     switch (type) {
  77.     case AVMEDIA_TYPE_VIDEO:
  78.         return avfilter_get_video_buffer_ref_from_frame(frame, perms);
  79.     case AVMEDIA_TYPE_AUDIO:
  80.         return avfilter_get_audio_buffer_ref_from_frame(frame, perms);
  81.     default:
  82.         return NULL;
  83.     }
  84. }
  85.  
  86. int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
  87. {
  88.     int planes, nb_channels;
  89.  
  90.     if (!dst)
  91.         return AVERROR(EINVAL);
  92.     /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */
  93.     av_assert0(src);
  94.  
  95.     memcpy(dst->data, src->data, sizeof(dst->data));
  96.     memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
  97.  
  98.     dst->pts     = src->pts;
  99.     dst->format  = src->format;
  100.     av_frame_set_pkt_pos(dst, src->pos);
  101.  
  102.     switch (src->type) {
  103.     case AVMEDIA_TYPE_VIDEO:
  104.         av_assert0(src->video);
  105.         dst->width               = src->video->w;
  106.         dst->height              = src->video->h;
  107.         dst->sample_aspect_ratio = src->video->sample_aspect_ratio;
  108.         dst->interlaced_frame    = src->video->interlaced;
  109.         dst->top_field_first     = src->video->top_field_first;
  110.         dst->key_frame           = src->video->key_frame;
  111.         dst->pict_type           = src->video->pict_type;
  112.         break;
  113.     case AVMEDIA_TYPE_AUDIO:
  114.         av_assert0(src->audio);
  115.         nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
  116.         planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
  117.  
  118.         if (planes > FF_ARRAY_ELEMS(dst->data)) {
  119.             dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));
  120.             if (!dst->extended_data)
  121.                 return AVERROR(ENOMEM);
  122.             memcpy(dst->extended_data, src->extended_data,
  123.                    planes * sizeof(*dst->extended_data));
  124.         } else
  125.             dst->extended_data = dst->data;
  126.         dst->nb_samples          = src->audio->nb_samples;
  127.         av_frame_set_sample_rate   (dst, src->audio->sample_rate);
  128.         av_frame_set_channel_layout(dst, src->audio->channel_layout);
  129.         av_frame_set_channels      (dst, src->audio->channels);
  130.         break;
  131.     default:
  132.         return AVERROR(EINVAL);
  133.     }
  134.  
  135.     return 0;
  136. }
  137. #endif
  138.  
  139. #if FF_API_FILL_FRAME
  140. int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,
  141.                                               const AVFilterBufferRef *samplesref)
  142. {
  143.     return avfilter_copy_buf_props(frame, samplesref);
  144. }
  145.  
  146. int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,
  147.                                               const AVFilterBufferRef *picref)
  148. {
  149.     return avfilter_copy_buf_props(frame, picref);
  150. }
  151.  
  152. int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
  153.                                         const AVFilterBufferRef *ref)
  154. {
  155.     return avfilter_copy_buf_props(frame, ref);
  156. }
  157. #endif
  158.