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libavcodec/libschroedinger.c

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00001 /*
00002  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00026 #include "libdirac_libschro.h"
00027 #include "libschroedinger.h"
00028 
00033 static const SchroVideoFormatEnum ff_schro_video_formats[]={
00034     SCHRO_VIDEO_FORMAT_CUSTOM     ,
00035     SCHRO_VIDEO_FORMAT_QSIF       ,
00036     SCHRO_VIDEO_FORMAT_QCIF       ,
00037     SCHRO_VIDEO_FORMAT_SIF        ,
00038     SCHRO_VIDEO_FORMAT_CIF        ,
00039     SCHRO_VIDEO_FORMAT_4SIF       ,
00040     SCHRO_VIDEO_FORMAT_4CIF       ,
00041     SCHRO_VIDEO_FORMAT_SD480I_60  ,
00042     SCHRO_VIDEO_FORMAT_SD576I_50  ,
00043     SCHRO_VIDEO_FORMAT_HD720P_60  ,
00044     SCHRO_VIDEO_FORMAT_HD720P_50  ,
00045     SCHRO_VIDEO_FORMAT_HD1080I_60 ,
00046     SCHRO_VIDEO_FORMAT_HD1080I_50 ,
00047     SCHRO_VIDEO_FORMAT_HD1080P_60 ,
00048     SCHRO_VIDEO_FORMAT_HD1080P_50 ,
00049     SCHRO_VIDEO_FORMAT_DC2K_24    ,
00050     SCHRO_VIDEO_FORMAT_DC4K_24    ,
00051 };
00052 
00053 SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avccontext)
00054 {
00055     unsigned int num_formats = sizeof(ff_schro_video_formats) /
00056                                sizeof(ff_schro_video_formats[0]);
00057 
00058     unsigned int idx = ff_dirac_schro_get_video_format_idx (avccontext);
00059 
00060     return (idx < num_formats) ? ff_schro_video_formats[idx] :
00061                                  SCHRO_VIDEO_FORMAT_CUSTOM;
00062 }
00063 
00064 int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
00065                                SchroFrameFormat  *schro_frame_fmt)
00066 {
00067     unsigned int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
00068                                sizeof(ffmpeg_schro_pixel_format_map[0]);
00069 
00070     int idx;
00071 
00072     for (idx = 0; idx < num_formats; ++idx) {
00073         if (ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
00074             *schro_frame_fmt = ffmpeg_schro_pixel_format_map[idx].schro_frame_fmt;
00075             return 0;
00076         }
00077     }
00078     return -1;
00079 }
00080 
00081 static void FreeSchroFrame(SchroFrame *frame, void *priv)
00082 {
00083     AVPicture *p_pic = priv;
00084 
00085     if (!p_pic)
00086         return;
00087 
00088     avpicture_free(p_pic);
00089     av_freep(&p_pic);
00090 }
00091 
00092 SchroFrame *ff_create_schro_frame(AVCodecContext *avccontext,
00093                                   SchroFrameFormat schro_frame_fmt)
00094 {
00095     AVPicture *p_pic;
00096     SchroFrame *p_frame;
00097     int y_width, uv_width;
00098     int y_height, uv_height;
00099     int i;
00100 
00101     y_width   = avccontext->width;
00102     y_height  = avccontext->height;
00103     uv_width  = y_width  >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt));
00104     uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
00105 
00106     p_pic = av_mallocz(sizeof(AVPicture));
00107     avpicture_alloc(p_pic, avccontext->pix_fmt, y_width, y_height);
00108 
00109     p_frame         = schro_frame_new();
00110     p_frame->format = schro_frame_fmt;
00111     p_frame->width  = y_width;
00112     p_frame->height = y_height;
00113     schro_frame_set_free_callback(p_frame, FreeSchroFrame, (void *)p_pic);
00114 
00115     for (i = 0; i < 3; ++i) {
00116         p_frame->components[i].width  = i ? uv_width : y_width;
00117         p_frame->components[i].stride = p_pic->linesize[i];
00118         p_frame->components[i].height = i ? uv_height : y_height;
00119         p_frame->components[i].length =
00120                  p_frame->components[i].stride * p_frame->components[i].height;
00121         p_frame->components[i].data   = p_pic->data[i];
00122 
00123         if (i) {
00124             p_frame->components[i].v_shift =
00125                 SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format);
00126             p_frame->components[i].h_shift =
00127                 SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format);
00128         }
00129     }
00130 
00131     return p_frame;
00132 }

Generated on Fri Sep 16 2011 17:17:38 for FFmpeg by  doxygen 1.7.1