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			|  |  |  | /* | 
		
	
		
			
			|  |  |  | * 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) | 
		
	
		
			
			|  |  |  | */ | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | extern "C" { | 
		
	
		
			
			|  |  |  | #include "avcodec.h" | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | #include <stdlib.h> | 
		
	
		
			
			|  |  |  | #include <utvideo/utvideo.h> | 
		
	
		
			
			|  |  |  | #include <utvideo/Codec.h> | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | #include "get_bits.h" | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | typedef struct { | 
		
	
		
			
			|  |  |  | uint32_t version; | 
		
	
		
			
			|  |  |  | uint32_t original_format; | 
		
	
		
			
			|  |  |  | uint32_t stripes; | 
		
	
		
			
			|  |  |  | uint32_t flags; | 
		
	
		
			
			|  |  |  | } UtVideoExtra; | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | typedef struct { | 
		
	
		
			
			|  |  |  | CCodec *codec; | 
		
	
		
			
			|  |  |  | unsigned int buf_size; | 
		
	
		
			
			|  |  |  | uint8_t *output; | 
		
	
		
			
			|  |  |  | } UtVideoContext; | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | static av_cold int utvideo_decode_init(AVCodecContext *avctx) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; | 
		
	
		
			
			|  |  |  | UtVideoExtra info; | 
		
	
		
			
			|  |  |  | int defined_fourcc = 0; | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | 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.stripes = AV_RL32(avctx->extradata + 8); | 
		
	
		
			
			|  |  |  | info.flags = AV_RL32(avctx->extradata + 12); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* Try to output the original format */ | 
		
	
		
			
			|  |  |  | switch(UNFCC(info.original_format)) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | case UTVF_YV12: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_YUV420P; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_YUY2: | 
		
	
		
			
			|  |  |  | case UTVF_YUYV: | 
		
	
		
			
			|  |  |  | case UTVF_YUNV: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_YUYV422; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_UYVY: | 
		
	
		
			
			|  |  |  | case UTVF_UYNV: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_UYVY422; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_RGB24_WIN: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_BGR24; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_RGB32_WIN: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_RGB32; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_ARGB32_WIN: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_ARGB; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case 0: | 
		
	
		
			
			|  |  |  | /* Fall back on FOURCC */ | 
		
	
		
			
			|  |  |  | switch(UNFCC(avctx->codec_tag)) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | case UTVF_ULY0: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_YUV420P; | 
		
	
		
			
			|  |  |  | defined_fourcc = UTVF_YV12; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_ULY2: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_YUYV422; | 
		
	
		
			
			|  |  |  | defined_fourcc = UTVF_YUY2; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_ULRG: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_BGR24; | 
		
	
		
			
			|  |  |  | defined_fourcc = UTVF_RGB24_WIN; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case UTVF_ULRA: | 
		
	
		
			
			|  |  |  | avctx->pix_fmt = PIX_FMT_RGB32; | 
		
	
		
			
			|  |  |  | defined_fourcc = UTVF_RGB32_WIN; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | default: | 
		
	
		
			
			|  |  |  | av_log(avctx, AV_LOG_ERROR, | 
		
	
		
			
			|  |  |  | "Codec ExtraData is Corrupt or Invalid: %X\n", info.original_format); | 
		
	
		
			
			|  |  |  | return -1; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* Only allocate the buffer once */ | 
		
	
		
			
			|  |  |  | utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); | 
		
	
		
			
			|  |  |  | utv->output = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t)); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | if(utv->output == NULL) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n"); | 
		
	
		
			
			|  |  |  | return -1; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* Allocate the output frame  */ | 
		
	
		
			
			|  |  |  | avctx->coded_frame = avcodec_alloc_frame(); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* 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 */ | 
		
	
		
			
			|  |  |  | utv->codec->DecodeBegin(defined_fourcc ? defined_fourcc : UNFCC(info.original_format), | 
		
	
		
			
			|  |  |  | avctx->width, avctx->height, CBGROSSWIDTH_WINDOWS, &info, | 
		
	
		
			
			|  |  |  | sizeof(UtVideoExtra)); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | return 0; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | static int utvideo_decode_frame(AVCodecContext *avctx, void *data, | 
		
	
		
			
			|  |  |  | int *data_size, AVPacket *avpkt) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; | 
		
	
		
			
			|  |  |  | AVFrame *pic = avctx->coded_frame; | 
		
	
		
			
			|  |  |  | unsigned 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->output, avpkt->data, true); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* Set the output data depending on the colorspace */ | 
		
	
		
			
			|  |  |  | switch(avctx->pix_fmt) | 
		
	
		
			
			|  |  |  | { | 
		
	
		
			
			|  |  |  | case PIX_FMT_YUV420P: | 
		
	
		
			
			|  |  |  | pic->linesize[0] = w; | 
		
	
		
			
			|  |  |  | pic->linesize[1] = pic->linesize[2] = w / 2; | 
		
	
		
			
			|  |  |  | pic->data[0] = utv->output; | 
		
	
		
			
			|  |  |  | pic->data[2] = utv->output + (w * h); | 
		
	
		
			
			|  |  |  | pic->data[1] = pic->data[2] + (w * h / 4); | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case PIX_FMT_YUYV422: | 
		
	
		
			
			|  |  |  | case PIX_FMT_UYVY422: | 
		
	
		
			
			|  |  |  | pic->linesize[0] = w * 2; | 
		
	
		
			
			|  |  |  | pic->data[0] = utv->output; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | case PIX_FMT_BGR24: | 
		
	
		
			
			|  |  |  | case PIX_FMT_RGB32: | 
		
	
		
			
			|  |  |  | /* Make the linesize negative, since Ut Video uses bottom-up BGR */ | 
		
	
		
			
			|  |  |  | pic->linesize[0] = -1 * w * (avctx->pix_fmt == PIX_FMT_BGR24 ? 3 : 4); | 
		
	
		
			
			|  |  |  | pic->data[0] = utv->output + utv->buf_size + pic->linesize[0]; | 
		
	
		
			
			|  |  |  | break; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | *data_size = sizeof(AVFrame); | 
		
	
		
			
			|  |  |  | *(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->output); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | /* Finish decoding and clean up the instance */ | 
		
	
		
			
			|  |  |  | utv->codec->DecodeEnd(); | 
		
	
		
			
			|  |  |  | CCodec::DeleteInstance(utv->codec); | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | return 0; | 
		
	
		
			
			|  |  |  | } | 
		
	
		
			
			|  |  |  | 
 | 
		
	
		
			
			|  |  |  | AVCodec ff_libutvideo_decoder = { | 
		
	
		
			
			|  |  |  | "utvideo", | 
		
	
		
			
			|  |  |  | AVMEDIA_TYPE_VIDEO, | 
		
	
		
			
			|  |  |  | CODEC_ID_UTVIDEO, | 
		
	
		
			
			|  |  |  | sizeof(UtVideoContext), | 
		
	
		
			
			|  |  |  | utvideo_decode_init, | 
		
	
		
			
			|  |  |  | NULL, | 
		
	
		
			
			|  |  |  | utvideo_decode_close, | 
		
	
		
			
			|  |  |  | utvideo_decode_frame, | 
		
	
		
			
			|  |  |  | CODEC_CAP_LOSSLESS, | 
		
	
		
			
			|  |  |  | NULL, | 
		
	
		
			
			|  |  |  | NULL, | 
		
	
		
			
			|  |  |  | NULL, | 
		
	
		
			
			|  |  |  | NULL, | 
		
	
		
			
			|  |  |  | NULL_IF_CONFIG_SMALL("Ut Video"), | 
		
	
		
			
			|  |  |  | }; |