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/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