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ffmpeg / libavcodec / libschroedinger.c @ 2912e87a

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/*
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 * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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* @file
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* function definitions common to libschroedingerdec.c and libschroedingerenc.c
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*/
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#include "libdirac_libschro.h"
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#include "libschroedinger.h"
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/**
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* Schroedinger video preset table. Ensure that this tables matches up correctly
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* with the ff_dirac_schro_video_format_info table in libdirac_libschro.c.
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*/
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static const SchroVideoFormatEnum ff_schro_video_formats[]={
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    SCHRO_VIDEO_FORMAT_CUSTOM     ,
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    SCHRO_VIDEO_FORMAT_QSIF       ,
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    SCHRO_VIDEO_FORMAT_QCIF       ,
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    SCHRO_VIDEO_FORMAT_SIF        ,
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    SCHRO_VIDEO_FORMAT_CIF        ,
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    SCHRO_VIDEO_FORMAT_4SIF       ,
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    SCHRO_VIDEO_FORMAT_4CIF       ,
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    SCHRO_VIDEO_FORMAT_SD480I_60  ,
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    SCHRO_VIDEO_FORMAT_SD576I_50  ,
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    SCHRO_VIDEO_FORMAT_HD720P_60  ,
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    SCHRO_VIDEO_FORMAT_HD720P_50  ,
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    SCHRO_VIDEO_FORMAT_HD1080I_60 ,
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    SCHRO_VIDEO_FORMAT_HD1080I_50 ,
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    SCHRO_VIDEO_FORMAT_HD1080P_60 ,
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    SCHRO_VIDEO_FORMAT_HD1080P_50 ,
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    SCHRO_VIDEO_FORMAT_DC2K_24    ,
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    SCHRO_VIDEO_FORMAT_DC4K_24    ,
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};
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SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avccontext)
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{
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    unsigned int num_formats = sizeof(ff_schro_video_formats) /
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                               sizeof(ff_schro_video_formats[0]);
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    unsigned int idx = ff_dirac_schro_get_video_format_idx (avccontext);
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    return (idx < num_formats) ? ff_schro_video_formats[idx] :
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                                 SCHRO_VIDEO_FORMAT_CUSTOM;
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}
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int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
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                               SchroFrameFormat  *schro_frame_fmt)
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{
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    unsigned int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
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                               sizeof(ffmpeg_schro_pixel_format_map[0]);
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    int idx;
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    for (idx = 0; idx < num_formats; ++idx) {
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        if (ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
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            *schro_frame_fmt = ffmpeg_schro_pixel_format_map[idx].schro_frame_fmt;
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            return 0;
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        }
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    }
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    return -1;
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}
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static void FreeSchroFrame(SchroFrame *frame, void *priv)
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{
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    AVPicture *p_pic = priv;
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    if (!p_pic)
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        return;
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    avpicture_free(p_pic);
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    av_freep(&p_pic);
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}
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SchroFrame *ff_create_schro_frame(AVCodecContext *avccontext,
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                                  SchroFrameFormat schro_frame_fmt)
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{
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    AVPicture *p_pic;
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    SchroFrame *p_frame;
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    int y_width, uv_width;
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    int y_height, uv_height;
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    int i;
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    y_width   = avccontext->width;
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    y_height  = avccontext->height;
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    uv_width  = y_width  >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt));
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    uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
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    p_pic = av_mallocz(sizeof(AVPicture));
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    avpicture_alloc(p_pic, avccontext->pix_fmt, y_width, y_height);
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    p_frame         = schro_frame_new();
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    p_frame->format = schro_frame_fmt;
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    p_frame->width  = y_width;
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    p_frame->height = y_height;
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    schro_frame_set_free_callback(p_frame, FreeSchroFrame, (void *)p_pic);
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    for (i = 0; i < 3; ++i) {
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        p_frame->components[i].width  = i ? uv_width : y_width;
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        p_frame->components[i].stride = p_pic->linesize[i];
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        p_frame->components[i].height = i ? uv_height : y_height;
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        p_frame->components[i].length =
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                 p_frame->components[i].stride * p_frame->components[i].height;
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        p_frame->components[i].data   = p_pic->data[i];
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        if (i) {
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            p_frame->components[i].v_shift =
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                SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format);
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            p_frame->components[i].h_shift =
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                SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format);
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        }
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    }
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    return p_frame;
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}