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| 1 | +/* |
| 2 | + * Copyright (c) 2011 Derek Buitenhuis |
| 3 | + * |
| 4 | + * This file is part of FFmpeg. |
| 5 | + * |
| 6 | + * FFmpeg is free software; you can redistribute it and/or |
| 7 | + * modify it under the terms of the GNU General Public |
| 8 | + * License as published by the Free Software Foundation; |
| 9 | + * version 2 of the License. |
| 10 | + * |
| 11 | + * FFmpeg is distributed in the hope that it will be useful, |
| 12 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | + * General Public License for more details. |
| 15 | + * |
| 16 | + * You should have received a copy of the GNU General Public |
| 17 | + * License along with FFmpeg; if not, write to the Free Software |
| 18 | + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | + */ |
| 20 | + |
| 21 | +/** |
| 22 | + * @file |
| 23 | + * Known FOURCCs: |
| 24 | + * 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA) |
| 25 | + */ |
| 26 | + |
| 27 | +extern "C" { |
| 28 | +#include "avcodec.h" |
| 29 | +} |
| 30 | + |
| 31 | +#include <stdlib.h> |
| 32 | +#include <utvideo/utvideo.h> |
| 33 | +#include <utvideo/Codec.h> |
| 34 | + |
| 35 | +#include "get_bits.h" |
| 36 | + |
| 37 | +typedef struct { |
| 38 | + uint32_t version; |
| 39 | + uint32_t original_format; |
| 40 | + uint32_t stripes; |
| 41 | + uint32_t flags; |
| 42 | +} UtVideoExtra; |
| 43 | + |
| 44 | +typedef struct { |
| 45 | + CCodec *codec; |
| 46 | + unsigned int buf_size; |
| 47 | + uint8_t *output; |
| 48 | +} UtVideoContext; |
| 49 | + |
| 50 | +static av_cold int utvideo_decode_init(AVCodecContext *avctx) |
| 51 | +{ |
| 52 | + UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 53 | + UtVideoExtra info; |
| 54 | + int defined_fourcc = 0; |
| 55 | + |
| 56 | + if(avctx->extradata_size != 4*4) |
| 57 | + { |
| 58 | + av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n"); |
| 59 | + return -1; |
| 60 | + } |
| 61 | + |
| 62 | + /* Read extradata */ |
| 63 | + info.version = AV_RL32(avctx->extradata); |
| 64 | + info.original_format = AV_RL32(avctx->extradata + 4); |
| 65 | + info.stripes = AV_RL32(avctx->extradata + 8); |
| 66 | + info.flags = AV_RL32(avctx->extradata + 12); |
| 67 | + |
| 68 | + /* Try to output the original format */ |
| 69 | + switch(UNFCC(info.original_format)) |
| 70 | + { |
| 71 | + case UTVF_YV12: |
| 72 | + avctx->pix_fmt = PIX_FMT_YUV420P; |
| 73 | + break; |
| 74 | + case UTVF_YUY2: |
| 75 | + case UTVF_YUYV: |
| 76 | + case UTVF_YUNV: |
| 77 | + avctx->pix_fmt = PIX_FMT_YUYV422; |
| 78 | + break; |
| 79 | + case UTVF_UYVY: |
| 80 | + case UTVF_UYNV: |
| 81 | + avctx->pix_fmt = PIX_FMT_UYVY422; |
| 82 | + break; |
| 83 | + case UTVF_RGB24_WIN: |
| 84 | + avctx->pix_fmt = PIX_FMT_BGR24; |
| 85 | + break; |
| 86 | + case UTVF_RGB32_WIN: |
| 87 | + avctx->pix_fmt = PIX_FMT_RGB32; |
| 88 | + break; |
| 89 | + case UTVF_ARGB32_WIN: |
| 90 | + avctx->pix_fmt = PIX_FMT_ARGB; |
| 91 | + break; |
| 92 | + case 0: |
| 93 | + /* Fall back on FOURCC */ |
| 94 | + switch(UNFCC(avctx->codec_tag)) |
| 95 | + { |
| 96 | + case UTVF_ULY0: |
| 97 | + avctx->pix_fmt = PIX_FMT_YUV420P; |
| 98 | + defined_fourcc = UTVF_YV12; |
| 99 | + break; |
| 100 | + case UTVF_ULY2: |
| 101 | + avctx->pix_fmt = PIX_FMT_YUYV422; |
| 102 | + defined_fourcc = UTVF_YUY2; |
| 103 | + break; |
| 104 | + case UTVF_ULRG: |
| 105 | + avctx->pix_fmt = PIX_FMT_BGR24; |
| 106 | + defined_fourcc = UTVF_RGB24_WIN; |
| 107 | + break; |
| 108 | + case UTVF_ULRA: |
| 109 | + avctx->pix_fmt = PIX_FMT_RGB32; |
| 110 | + defined_fourcc = UTVF_RGB32_WIN; |
| 111 | + break; |
| 112 | + } |
| 113 | + break; |
| 114 | + default: |
| 115 | + av_log(avctx, AV_LOG_ERROR, |
| 116 | + "Codec ExtraData is Corrupt or Invalid: %X\n", info.original_format); |
| 117 | + return -1; |
| 118 | + } |
| 119 | + |
| 120 | + /* Only allocate the buffer once */ |
| 121 | + utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); |
| 122 | + utv->output = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t)); |
| 123 | + |
| 124 | + if(utv->output == NULL) |
| 125 | + { |
| 126 | + av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n"); |
| 127 | + return -1; |
| 128 | + } |
| 129 | + |
| 130 | + /* Allocate the output frame */ |
| 131 | + avctx->coded_frame = avcodec_alloc_frame(); |
| 132 | + |
| 133 | + /* Ut Video only supports 8-bit */ |
| 134 | + avctx->bits_per_raw_sample = 8; |
| 135 | + |
| 136 | + /* Is it interlaced? */ |
| 137 | + avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0; |
| 138 | + |
| 139 | + /* Apparently Ut Video doesn't store this info... */ |
| 140 | + avctx->coded_frame->top_field_first = 1; |
| 141 | + |
| 142 | + /* |
| 143 | + * Create a Ut Video instance. Since the function wants |
| 144 | + * an "interface name" string, pass it the name of the lib. |
| 145 | + */ |
| 146 | + utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec"); |
| 147 | + |
| 148 | + /* Initialize Decoding */ |
| 149 | + utv->codec->DecodeBegin(defined_fourcc ? defined_fourcc : UNFCC(info.original_format), |
| 150 | + avctx->width, avctx->height, CBGROSSWIDTH_WINDOWS, &info, |
| 151 | + sizeof(UtVideoExtra)); |
| 152 | + |
| 153 | + return 0; |
| 154 | +} |
| 155 | + |
| 156 | +static int utvideo_decode_frame(AVCodecContext *avctx, void *data, |
| 157 | + int *data_size, AVPacket *avpkt) |
| 158 | +{ |
| 159 | + UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 160 | + AVFrame *pic = avctx->coded_frame; |
| 161 | + unsigned int w = avctx->width, h = avctx->height; |
| 162 | + |
| 163 | + /* Set flags */ |
| 164 | + pic->reference = 0; |
| 165 | + pic->pict_type = AV_PICTURE_TYPE_I; |
| 166 | + pic->key_frame = 1; |
| 167 | + |
| 168 | + /* Decode the frame */ |
| 169 | + utv->codec->DecodeFrame(utv->output, avpkt->data, true); |
| 170 | + |
| 171 | + /* Set the output data depending on the colorspace */ |
| 172 | + switch(avctx->pix_fmt) |
| 173 | + { |
| 174 | + case PIX_FMT_YUV420P: |
| 175 | + pic->linesize[0] = w; |
| 176 | + pic->linesize[1] = pic->linesize[2] = w / 2; |
| 177 | + pic->data[0] = utv->output; |
| 178 | + pic->data[2] = utv->output + (w * h); |
| 179 | + pic->data[1] = pic->data[2] + (w * h / 4); |
| 180 | + break; |
| 181 | + case PIX_FMT_YUYV422: |
| 182 | + case PIX_FMT_UYVY422: |
| 183 | + pic->linesize[0] = w * 2; |
| 184 | + pic->data[0] = utv->output; |
| 185 | + break; |
| 186 | + case PIX_FMT_BGR24: |
| 187 | + case PIX_FMT_RGB32: |
| 188 | + /* Make the linesize negative, since Ut Video uses bottom-up BGR */ |
| 189 | + pic->linesize[0] = -1 * w * (avctx->pix_fmt == PIX_FMT_BGR24 ? 3 : 4); |
| 190 | + pic->data[0] = utv->output + utv->buf_size + pic->linesize[0]; |
| 191 | + break; |
| 192 | + } |
| 193 | + |
| 194 | + *data_size = sizeof(AVFrame); |
| 195 | + *(AVFrame *)data = *pic; |
| 196 | + |
| 197 | + return avpkt->size; |
| 198 | +} |
| 199 | + |
| 200 | +static av_cold int utvideo_decode_close(AVCodecContext *avctx) |
| 201 | +{ |
| 202 | + UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 203 | + |
| 204 | + /* Free output */ |
| 205 | + av_freep(&avctx->coded_frame); |
| 206 | + av_freep(&utv->output); |
| 207 | + |
| 208 | + /* Finish decoding and clean up the instance */ |
| 209 | + utv->codec->DecodeEnd(); |
| 210 | + CCodec::DeleteInstance(utv->codec); |
| 211 | + |
| 212 | + return 0; |
| 213 | +} |
| 214 | + |
| 215 | +AVCodec ff_libutvideo_decoder = { |
| 216 | + "utvideo", |
| 217 | + AVMEDIA_TYPE_VIDEO, |
| 218 | + CODEC_ID_UTVIDEO, |
| 219 | + sizeof(UtVideoContext), |
| 220 | + utvideo_decode_init, |
| 221 | + NULL, |
| 222 | + utvideo_decode_close, |
| 223 | + utvideo_decode_frame, |
| 224 | + CODEC_CAP_LOSSLESS, |
| 225 | + NULL, |
| 226 | + NULL, |
| 227 | + NULL, |
| 228 | + NULL, |
| 229 | + NULL_IF_CONFIG_SMALL("Ut Video"), |
| 230 | +}; |