/* * Copyright (c) 2011 Derek Buitenhuis * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; * version 2 of the License. * * 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 * General Public License for more details. * * You should have received a copy of the GNU 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 * Known FOURCCs: *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA), *     'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709) */ extern "C" {#include "avcodec.h"} #include "libutvideo.h"#include "get_bits.h" static av_cold int utvideo_decode_init(AVCodecContext *avctx){    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;    UtVideoExtra info;    int format;    int begin_ret;     if (avctx->extradata_size != 4*4) {        av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n");        return -1;    }     /* Read extradata */    info.version = AV_RL32(avctx->extradata);    info.original_format = AV_RL32(avctx->extradata + 4);    info.frameinfo_size = AV_RL32(avctx->extradata + 8);    info.flags = AV_RL32(avctx->extradata + 12);     /* Pick format based on FOURCC */    switch (avctx->codec_tag) {#ifdef UTV_BT709    case MKTAG('U', 'L', 'H', '0'):        avctx->pix_fmt = AV_PIX_FMT_YUV420P;        avctx->colorspace = AVCOL_SPC_BT709;        format = UTVF_YV12;        break;    case MKTAG('U', 'L', 'H', '2'):        avctx->pix_fmt = AV_PIX_FMT_YUYV422;        avctx->colorspace = AVCOL_SPC_BT709;        format = UTVF_YUY2;        break;#endif    case MKTAG('U', 'L', 'Y', '0'):        avctx->pix_fmt = AV_PIX_FMT_YUV420P;        format = UTVF_YV12;        break;    case MKTAG('U', 'L', 'Y', '2'):        avctx->pix_fmt = AV_PIX_FMT_YUYV422;        format = UTVF_YUY2;        break;    case MKTAG('U', 'L', 'R', 'G'):        avctx->pix_fmt = AV_PIX_FMT_BGR24;        format = UTVF_NFCC_BGR_BU;        break;    case MKTAG('U', 'L', 'R', 'A'):        avctx->pix_fmt = AV_PIX_FMT_RGB32;        format = UTVF_NFCC_BGRA_BU;        break;    default:        av_log(avctx, AV_LOG_ERROR,              "Not a Ut Video FOURCC: %X\n", avctx->codec_tag);        return -1;    }     /* Only allocate the buffer once */    utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);    utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t));     if (utv->buffer == NULL) {        av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");        return -1;    }     /* Allocate the output frame */    avctx->coded_frame = av_frame_alloc();     /* Ut Video only supports 8-bit */    avctx->bits_per_raw_sample = 8;     /* Is it interlaced? */    avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;     /* Apparently Ut Video doesn't store this info... */    avctx->coded_frame->top_field_first = 1;     /*     * Create a Ut Video instance. Since the function wants     * an "interface name" string, pass it the name of the lib.     */    utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");     /* Initialize Decoding */    begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,                            CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));     /* Check to see if the decoder initlized properly */    if (begin_ret != 0) {        av_log(avctx, AV_LOG_ERROR,               "Could not initialize decoder: %d\n", begin_ret);        return -1;    }     return 0;} static int utvideo_decode_frame(AVCodecContext *avctx, void *data,                                int *got_frame, AVPacket *avpkt){    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;    AVFrame *pic = avctx->coded_frame;    int w = avctx->width, h = avctx->height;     /* Set flags */    pic->reference = 0;    pic->pict_type = AV_PICTURE_TYPE_I;    pic->key_frame = 1;     /* Decode the frame */    utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);     /* Set the output data depending on the colorspace */    switch (avctx->pix_fmt) {    case AV_PIX_FMT_YUV420P:        pic->linesize[0] = w;        pic->linesize[1] = pic->linesize[2] = w / 2;        pic->data[0] = utv->buffer;        pic->data[2] = utv->buffer + (w * h);        pic->data[1] = pic->data[2] + (w * h / 4);        break;    case AV_PIX_FMT_YUYV422:        pic->linesize[0] = w * 2;        pic->data[0] = utv->buffer;        break;    case AV_PIX_FMT_BGR24:    case AV_PIX_FMT_RGB32:        /* Make the linesize negative, since Ut Video uses bottom-up BGR */        pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);        pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];        break;    }     *got_frame = 1;    *(AVFrame *)data = *pic;     return avpkt->size;} static av_cold int utvideo_decode_close(AVCodecContext *avctx){    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;     /* Free output */    av_freep(&avctx->coded_frame);    av_freep(&utv->buffer);     /* Finish decoding and clean up the instance */    utv->codec->DecodeEnd();    CCodec::DeleteInstance(utv->codec);     return 0;} AVCodec ff_libutvideo_decoder = {    "libutvideo",    NULL_IF_CONFIG_SMALL("Ut Video"),    AVMEDIA_TYPE_VIDEO,    AV_CODEC_ID_UTVIDEO,    0,    //capabilities    NULL, //supported_framerates    NULL, //pix_fmts    NULL, //supported_samplerates    NULL, //sample_fmts    NULL, //channel_layouts    0,    //max_lowres    NULL, //priv_class    NULL, //profiles    sizeof(UtVideoContext),    NULL, //next    NULL, //init_thread_copy    NULL, //update_thread_context    NULL, //defaults    NULL, //init_static_data    utvideo_decode_init,    NULL, //encode    NULL, //encode2    utvideo_decode_frame,    utvideo_decode_close,};