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     av_dict_free(&dst->metadata);
  37     av_dict_copy(&dst->metadata, av_frame_get_metadata(src), 0);
  38
  39     switch (dst->type) {
  40     case AVMEDIA_TYPE_VIDEO:
  41         dst->video->w                   = src->width;
  42         dst->video->h                   = src->height;
  43         dst->video->sample_aspect_ratio = src->sample_aspect_ratio;
  44         dst->video->interlaced          = src->interlaced_frame;
  45         dst->video->top_field_first     = src->top_field_first;
  46         dst->video->key_frame           = src->key_frame;
  47         dst->video->pict_type           = src->pict_type;
  48         av_freep(&dst->video->qp_table);
  49         dst->video->qp_table_linesize = 0;
  50         if (src->qscale_table) {
  51             int qsize = src->qstride ? src->qstride * ((src->height+15)/16) : (src->width+15)/16;
  52             dst->video->qp_table = av_malloc(qsize);
  53             if (!dst->video->qp_table)
  54                 return AVERROR(ENOMEM);
  55             dst->video->qp_table_linesize = src->qstride;
  56             dst->video->qp_table_size     = qsize;
  57             memcpy(dst->video->qp_table, src->qscale_table, qsize);
  58         }
  59         break;
  60     case AVMEDIA_TYPE_AUDIO:
  61         dst->audio->sample_rate         = src->sample_rate;
  62         dst->audio->channel_layout      = src->channel_layout;
  63         dst->audio->channels            = src->channels;
  64         if(src->channels != av_get_channel_layout_nb_channels(src->channel_layout)) {
  65             av_log(0, AV_LOG_ERROR, "libavfilter does not support this channel layout\n");
  66             return AVERROR(EINVAL);
  67         }
  68         break;
  69     default:
  70         return AVERROR(EINVAL);
  71     }
  72
  73     return 0;
  74 }
  75
  76 AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
  77                                                             int perms)
  78 {
  79     AVFilterBufferRef *picref =
  80         avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
  81                                                   frame->width, frame->height,
  82                                                   frame->format);
  83     if (!picref)
  84         return NULL;
  85     if (avfilter_copy_frame_props(picref, frame) < 0) {
  86         picref->buf->data[0] = NULL;
  87         avfilter_unref_bufferp(&picref);
  88     }
  89     return picref;
  90 }
  91
  92 AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
  93                                                             int perms)
  94 {
  95     AVFilterBufferRef *samplesref =
  96         avfilter_get_audio_buffer_ref_from_arrays((uint8_t **)frame->data, frame->linesize[0], perms,
  97                                                   frame->nb_samples, frame->format,
  98                                                   av_frame_get_channel_layout(frame));
  99     if (!samplesref)
 100         return NULL;
 101     if (avfilter_copy_frame_props(samplesref, frame) < 0) {
 102         samplesref->buf->data[0] = NULL;
 103         avfilter_unref_bufferp(&samplesref);
 104     }
 105     return samplesref;
 106 }
 107
 108 AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,
 109                                                       const AVFrame *frame,
 110                                                       int perms)
 111 {
 112     switch (type) {
 113     case AVMEDIA_TYPE_VIDEO:
 114         return avfilter_get_video_buffer_ref_from_frame(frame, perms);
 115     case AVMEDIA_TYPE_AUDIO:
 116         return avfilter_get_audio_buffer_ref_from_frame(frame, perms);
 117     default:
 118         return NULL;
 119     }
 120 }
 121
 122 int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
 123 {
 124     int planes, nb_channels;
 125
 126     if (!dst)
 127         return AVERROR(EINVAL);
 128     /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */
 129     av_assert0(src);
 130
 131     memcpy(dst->data, src->data, sizeof(dst->data));
 132     memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
 133
 134     dst->pts     = src->pts;
 135     dst->format  = src->format;
 136     av_frame_set_pkt_pos(dst, src->pos);
 137
 138     switch (src->type) {
 139     case AVMEDIA_TYPE_VIDEO:
 140         av_assert0(src->video);
 141         dst->width               = src->video->w;
 142         dst->height              = src->video->h;
 143         dst->sample_aspect_ratio = src->video->sample_aspect_ratio;
 144         dst->interlaced_frame    = src->video->interlaced;
 145         dst->top_field_first     = src->video->top_field_first;
 146         dst->key_frame           = src->video->key_frame;
 147         dst->pict_type           = src->video->pict_type;
 148         break;
 149     case AVMEDIA_TYPE_AUDIO:
 150         av_assert0(src->audio);
 151         nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
 152         planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
 153
 154         if (planes > FF_ARRAY_ELEMS(dst->data)) {
 155             dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));
 156             if (!dst->extended_data)
 157                 return AVERROR(ENOMEM);
 158             memcpy(dst->extended_data, src->extended_data,
 159                    planes * sizeof(*dst->extended_data));
 160         } else
 161             dst->extended_data = dst->data;
 162         dst->nb_samples          = src->audio->nb_samples;
 163         av_frame_set_sample_rate   (dst, src->audio->sample_rate);
 164         av_frame_set_channel_layout(dst, src->audio->channel_layout);
 165         av_frame_set_channels      (dst, src->audio->channels);
 166         break;
 167     default:
 168         return AVERROR(EINVAL);
 169     }
 170
 171     return 0;
 172 }
 173
 174 #ifdef FF_API_FILL_FRAME
 175 int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,
 176                                               const AVFilterBufferRef *samplesref)
 177 {
 178     return avfilter_copy_buf_props(frame, samplesref);
 179 }
 180
 181 int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,
 182                                               const AVFilterBufferRef *picref)
 183 {
 184     return avfilter_copy_buf_props(frame, picref);
 185 }
 186
 187 int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
 188                                         const AVFilterBufferRef *ref)
 189 {
 190     return avfilter_copy_buf_props(frame, ref);
 191 }
 192 #endif