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  1. /*
  2.  * Copyright Stefano Sabatini <stefasab gmail com>
  3.  * Copyright Anton Khirnov <anton khirnov net>
  4.  * Copyright Michael Niedermayer <michaelni gmx at>
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "libavutil/channel_layout.h"
  24. #include "libavutil/avassert.h"
  25. #include "libavutil/common.h"
  26. #include "libavutil/imgutils.h"
  27. #include "libavcodec/avcodec.h"
  28.  
  29. #include "avfilter.h"
  30. #include "internal.h"
  31. #include "audio.h"
  32. #include "avcodec.h"
  33. #include "version.h"
  34.  
  35. #if FF_API_AVFILTERBUFFER
  36. void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
  37. {
  38.     if (ptr->extended_data != ptr->data)
  39.         av_freep(&ptr->extended_data);
  40.     av_free(ptr->data[0]);
  41.     av_free(ptr);
  42. }
  43.  
  44. static void copy_video_props(AVFilterBufferRefVideoProps *dst, AVFilterBufferRefVideoProps *src) {
  45.     *dst = *src;
  46.     if (src->qp_table) {
  47.         int qsize = src->qp_table_size;
  48.         dst->qp_table = av_malloc(qsize);
  49.         memcpy(dst->qp_table, src->qp_table, qsize);
  50.     }
  51. }
  52.  
  53. AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
  54. {
  55.     AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
  56.     if (!ret)
  57.         return NULL;
  58.     *ret = *ref;
  59.  
  60.     ret->metadata = NULL;
  61.     av_dict_copy(&ret->metadata, ref->metadata, 0);
  62.  
  63.     if (ref->type == AVMEDIA_TYPE_VIDEO) {
  64.         ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
  65.         if (!ret->video) {
  66.             av_free(ret);
  67.             return NULL;
  68.         }
  69.         copy_video_props(ret->video, ref->video);
  70.         ret->extended_data = ret->data;
  71.     } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
  72.         ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
  73.         if (!ret->audio) {
  74.             av_free(ret);
  75.             return NULL;
  76.         }
  77.         *ret->audio = *ref->audio;
  78.  
  79.         if (ref->extended_data && ref->extended_data != ref->data) {
  80.             int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
  81.             if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) *
  82.                                                  nb_channels))) {
  83.                 av_freep(&ret->audio);
  84.                 av_freep(&ret);
  85.                 return NULL;
  86.             }
  87.             memcpy(ret->extended_data, ref->extended_data,
  88.                    sizeof(*ret->extended_data) * nb_channels);
  89.         } else
  90.             ret->extended_data = ret->data;
  91.     }
  92.     ret->perms &= pmask;
  93.     ret->buf->refcount ++;
  94.     return ret;
  95. }
  96.  
  97. void avfilter_unref_buffer(AVFilterBufferRef *ref)
  98. {
  99.     if (!ref)
  100.         return;
  101.     av_assert0(ref->buf->refcount > 0);
  102.     if (!(--ref->buf->refcount))
  103.         ref->buf->free(ref->buf);
  104.     if (ref->extended_data != ref->data)
  105.         av_freep(&ref->extended_data);
  106.     if (ref->video)
  107.         av_freep(&ref->video->qp_table);
  108.     av_freep(&ref->video);
  109.     av_freep(&ref->audio);
  110.     av_dict_free(&ref->metadata);
  111.     av_free(ref);
  112. }
  113.  
  114. void avfilter_unref_bufferp(AVFilterBufferRef **ref)
  115. {
  116.     avfilter_unref_buffer(*ref);
  117.     *ref = NULL;
  118. }
  119.  
  120. int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
  121. {
  122.     dst->pts    = src->pts;
  123.     dst->pos    = av_frame_get_pkt_pos(src);
  124.     dst->format = src->format;
  125.  
  126.     av_dict_free(&dst->metadata);
  127.     av_dict_copy(&dst->metadata, av_frame_get_metadata(src), 0);
  128.  
  129.     switch (dst->type) {
  130.     case AVMEDIA_TYPE_VIDEO:
  131.         dst->video->w                   = src->width;
  132.         dst->video->h                   = src->height;
  133.         dst->video->sample_aspect_ratio = src->sample_aspect_ratio;
  134.         dst->video->interlaced          = src->interlaced_frame;
  135.         dst->video->top_field_first     = src->top_field_first;
  136.         dst->video->key_frame           = src->key_frame;
  137.         dst->video->pict_type           = src->pict_type;
  138.         break;
  139.     case AVMEDIA_TYPE_AUDIO:
  140.         dst->audio->sample_rate         = src->sample_rate;
  141.         dst->audio->channel_layout      = src->channel_layout;
  142.         break;
  143.     default:
  144.         return AVERROR(EINVAL);
  145.     }
  146.  
  147.     return 0;
  148. }
  149.  
  150. void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src)
  151. {
  152.     // copy common properties
  153.     dst->pts             = src->pts;
  154.     dst->pos             = src->pos;
  155.  
  156.     switch (src->type) {
  157.     case AVMEDIA_TYPE_VIDEO: {
  158.         if (dst->video->qp_table)
  159.             av_freep(&dst->video->qp_table);
  160.         copy_video_props(dst->video, src->video);
  161.         break;
  162.     }
  163.     case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;
  164.     default: break;
  165.     }
  166.  
  167.     av_dict_free(&dst->metadata);
  168.     av_dict_copy(&dst->metadata, src->metadata, 0);
  169. }
  170. #endif /* FF_API_AVFILTERBUFFER */
  171.