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