git.sesse.net Git - ffmpeg/blob - libavfilter/avcodec.c

   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/opt.h"
  29
  30 int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
  31 {
  32     dst->pts    = src->pts;
  33     dst->pos    = av_frame_get_pkt_pos(src);
  34     dst->format = src->format;
  35
  36     switch (dst->type) {
  37     case AVMEDIA_TYPE_VIDEO:
  38         dst->video->w                   = src->width;
  39         dst->video->h                   = src->height;
  40         dst->video->sample_aspect_ratio = src->sample_aspect_ratio;
  41         dst->video->interlaced          = src->interlaced_frame;
  42         dst->video->top_field_first     = src->top_field_first;
  43         dst->video->key_frame           = src->key_frame;
  44         dst->video->pict_type           = src->pict_type;
  45         break;
  46     case AVMEDIA_TYPE_AUDIO:
  47         dst->audio->sample_rate         = src->sample_rate;
  48         dst->audio->channel_layout      = src->channel_layout;
  49         break;
  50     default:
  51         return AVERROR(EINVAL);
  52     }
  53
  54     return 0;
  55 }
  56
  57 AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
  58                                                             int perms)
  59 {
  60     AVFilterBufferRef *picref =
  61         avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
  62                                                   frame->width, frame->height,
  63                                                   frame->format);
  64     if (!picref)
  65         return NULL;
  66     avfilter_copy_frame_props(picref, frame);
  67     return picref;
  68 }
  69
  70 AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
  71                                                             int perms)
  72 {
  73     AVFilterBufferRef *samplesref =
  74         avfilter_get_audio_buffer_ref_from_arrays((uint8_t **)frame->data, frame->linesize[0], perms,
  75                                                   frame->nb_samples, frame->format,
  76                                                   av_frame_get_channel_layout(frame));
  77     if (!samplesref)
  78         return NULL;
  79     avfilter_copy_frame_props(samplesref, frame);
  80     return samplesref;
  81 }
  82
  83 AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,
  84                                                       const AVFrame *frame,
  85                                                       int perms)
  86 {
  87     switch (type) {
  88     case AVMEDIA_TYPE_VIDEO:
  89         return avfilter_get_video_buffer_ref_from_frame(frame, perms);
  90     case AVMEDIA_TYPE_AUDIO:
  91         return avfilter_get_audio_buffer_ref_from_frame(frame, perms);
  92     default:
  93         return NULL;
  94     }
  95 }
  96
  97 int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
  98 {
  99     int planes, nb_channels;
 100
 101     if (!dst)
 102         return AVERROR(EINVAL);
 103     /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */
 104     av_assert0(src);
 105
 106     memcpy(dst->data, src->data, sizeof(dst->data));
 107     memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
 108
 109     dst->pts     = src->pts;
 110     dst->format  = src->format;
 111     av_frame_set_pkt_pos(dst, src->pos);
 112
 113     switch (src->type) {
 114     case AVMEDIA_TYPE_VIDEO:
 115         av_assert0(src->video);
 116         dst->width               = src->video->w;
 117         dst->height              = src->video->h;
 118         dst->sample_aspect_ratio = src->video->sample_aspect_ratio;
 119         dst->interlaced_frame    = src->video->interlaced;
 120         dst->top_field_first     = src->video->top_field_first;
 121         dst->key_frame           = src->video->key_frame;
 122         dst->pict_type           = src->video->pict_type;
 123         break;
 124     case AVMEDIA_TYPE_AUDIO:
 125         av_assert0(src->audio);
 126         nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
 127         planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
 128
 129         if (planes > FF_ARRAY_ELEMS(dst->data)) {
 130             dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));
 131             if (!dst->extended_data)
 132                 return AVERROR(ENOMEM);
 133             memcpy(dst->extended_data, src->extended_data,
 134                    planes * sizeof(dst->extended_data));
 135         } else
 136             dst->extended_data = dst->data;
 137         dst->nb_samples          = src->audio->nb_samples;
 138         av_frame_set_sample_rate   (dst, src->audio->sample_rate);
 139         av_frame_set_channel_layout(dst, src->audio->channel_layout);
 140         break;
 141     default:
 142         return AVERROR(EINVAL);
 143     }
 144
 145     return 0;
 146 }
 147
 148 #ifdef FF_API_FILL_FRAME
 149 int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,
 150                                               const AVFilterBufferRef *samplesref)
 151 {
 152     return avfilter_copy_buf_props(frame, samplesref);
 153 }
 154
 155 int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,
 156                                               const AVFilterBufferRef *picref)
 157 {
 158     return avfilter_copy_buf_props(frame, picref);
 159 }
 160
 161 int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
 162                                         const AVFilterBufferRef *ref)
 163 {
 164     return avfilter_copy_buf_props(frame, ref);
 165 }
 166 #endif