libschroedinger.c.svn-base

ffmpeg最新源码

/*
 * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
* @file libschroedinger.c
* function definitions common to libschroedingerdec.c and libschroedingerenc.c
*/

#include "libdirac_libschro.h"
#include "libschroedinger.h"

/**
* Schroedinger video preset table. Ensure that this tables matches up correctly
* with the ff_dirac_schro_video_format_info table in libdirac_libschro.c.
*/
static const SchroVideoFormatEnum ff_schro_video_formats[]={
    SCHRO_VIDEO_FORMAT_CUSTOM     ,
    SCHRO_VIDEO_FORMAT_QSIF       ,
    SCHRO_VIDEO_FORMAT_QCIF       ,
    SCHRO_VIDEO_FORMAT_SIF        ,
    SCHRO_VIDEO_FORMAT_CIF        ,
    SCHRO_VIDEO_FORMAT_4SIF       ,
    SCHRO_VIDEO_FORMAT_4CIF       ,
    SCHRO_VIDEO_FORMAT_SD480I_60  ,
    SCHRO_VIDEO_FORMAT_SD576I_50  ,
    SCHRO_VIDEO_FORMAT_HD720P_60  ,
    SCHRO_VIDEO_FORMAT_HD720P_50  ,
    SCHRO_VIDEO_FORMAT_HD1080I_60 ,
    SCHRO_VIDEO_FORMAT_HD1080I_50 ,
    SCHRO_VIDEO_FORMAT_HD1080P_60 ,
    SCHRO_VIDEO_FORMAT_HD1080P_50 ,
    SCHRO_VIDEO_FORMAT_DC2K_24    ,
    SCHRO_VIDEO_FORMAT_DC4K_24    ,
};

SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avccontext)
{
    unsigned int num_formats = sizeof(ff_schro_video_formats) /
                               sizeof(ff_schro_video_formats[0]);

    unsigned int idx = ff_dirac_schro_get_video_format_idx (avccontext);

    return (idx < num_formats) ?
                 ff_schro_video_formats[idx] : SCHRO_VIDEO_FORMAT_CUSTOM;
}

int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
                               SchroFrameFormat  *schro_frame_fmt)
{
    unsigned int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
                               sizeof(ffmpeg_schro_pixel_format_map[0]);

    int idx;

    for (idx = 0; idx < num_formats; ++idx) {
        if (ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
            *schro_frame_fmt =
                         ffmpeg_schro_pixel_format_map[idx].schro_frame_fmt;
            return 0;
        }
    }
    return -1;
}