| 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 | * 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709) |
| 26 | */ |
| 27 | |
| 28 | extern "C" { |
| 29 | #include "avcodec.h" |
| 30 | } |
| 31 | |
| 32 | #include "libutvideo.h" |
| 33 | #include "get_bits.h" |
| 34 | |
| 35 | static av_cold int utvideo_decode_init(AVCodecContext *avctx) |
| 36 | { |
| 37 | UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 38 | UtVideoExtra info; |
| 39 | int format; |
| 40 | int begin_ret; |
| 41 | |
| 42 | if (avctx->extradata_size != 4*4) { |
| 43 | av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n"); |
| 44 | return -1; |
| 45 | } |
| 46 | |
| 47 | /* Read extradata */ |
| 48 | info.version = AV_RL32(avctx->extradata); |
| 49 | info.original_format = AV_RL32(avctx->extradata + 4); |
| 50 | info.frameinfo_size = AV_RL32(avctx->extradata + 8); |
| 51 | info.flags = AV_RL32(avctx->extradata + 12); |
| 52 | |
| 53 | /* Pick format based on FOURCC */ |
| 54 | switch (avctx->codec_tag) { |
| 55 | #ifdef UTV_BT709 |
| 56 | case MKTAG('U', 'L', 'H', '0'): |
| 57 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 58 | avctx->colorspace = AVCOL_SPC_BT709; |
| 59 | format = UTVF_YV12; |
| 60 | break; |
| 61 | case MKTAG('U', 'L', 'H', '2'): |
| 62 | avctx->pix_fmt = AV_PIX_FMT_YUYV422; |
| 63 | avctx->colorspace = AVCOL_SPC_BT709; |
| 64 | format = UTVF_YUY2; |
| 65 | break; |
| 66 | #endif |
| 67 | case MKTAG('U', 'L', 'Y', '0'): |
| 68 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 69 | format = UTVF_YV12; |
| 70 | break; |
| 71 | case MKTAG('U', 'L', 'Y', '2'): |
| 72 | avctx->pix_fmt = AV_PIX_FMT_YUYV422; |
| 73 | format = UTVF_YUY2; |
| 74 | break; |
| 75 | case MKTAG('U', 'L', 'R', 'G'): |
| 76 | avctx->pix_fmt = AV_PIX_FMT_BGR24; |
| 77 | format = UTVF_NFCC_BGR_BU; |
| 78 | break; |
| 79 | case MKTAG('U', 'L', 'R', 'A'): |
| 80 | avctx->pix_fmt = AV_PIX_FMT_RGB32; |
| 81 | format = UTVF_NFCC_BGRA_BU; |
| 82 | break; |
| 83 | default: |
| 84 | av_log(avctx, AV_LOG_ERROR, |
| 85 | "Not a Ut Video FOURCC: %X\n", avctx->codec_tag); |
| 86 | return -1; |
| 87 | } |
| 88 | |
| 89 | /* Only allocate the buffer once */ |
| 90 | utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); |
| 91 | utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t)); |
| 92 | |
| 93 | if (utv->buffer == NULL) { |
| 94 | av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n"); |
| 95 | return -1; |
| 96 | } |
| 97 | |
| 98 | /* Allocate the output frame */ |
| 99 | avctx->coded_frame = av_frame_alloc(); |
| 100 | |
| 101 | /* Ut Video only supports 8-bit */ |
| 102 | avctx->bits_per_raw_sample = 8; |
| 103 | |
| 104 | /* Is it interlaced? */ |
| 105 | avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0; |
| 106 | |
| 107 | /* Apparently Ut Video doesn't store this info... */ |
| 108 | avctx->coded_frame->top_field_first = 1; |
| 109 | |
| 110 | /* |
| 111 | * Create a Ut Video instance. Since the function wants |
| 112 | * an "interface name" string, pass it the name of the lib. |
| 113 | */ |
| 114 | utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec"); |
| 115 | |
| 116 | /* Initialize Decoding */ |
| 117 | begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height, |
| 118 | CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra)); |
| 119 | |
| 120 | /* Check to see if the decoder initlized properly */ |
| 121 | if (begin_ret != 0) { |
| 122 | av_log(avctx, AV_LOG_ERROR, |
| 123 | "Could not initialize decoder: %d\n", begin_ret); |
| 124 | return -1; |
| 125 | } |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static int utvideo_decode_frame(AVCodecContext *avctx, void *data, |
| 131 | int *got_frame, AVPacket *avpkt) |
| 132 | { |
| 133 | UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 134 | AVFrame *pic = avctx->coded_frame; |
| 135 | int w = avctx->width, h = avctx->height; |
| 136 | |
| 137 | /* Set flags */ |
| 138 | pic->reference = 0; |
| 139 | pic->pict_type = AV_PICTURE_TYPE_I; |
| 140 | pic->key_frame = 1; |
| 141 | |
| 142 | /* Decode the frame */ |
| 143 | utv->codec->DecodeFrame(utv->buffer, avpkt->data, true); |
| 144 | |
| 145 | /* Set the output data depending on the colorspace */ |
| 146 | switch (avctx->pix_fmt) { |
| 147 | case AV_PIX_FMT_YUV420P: |
| 148 | pic->linesize[0] = w; |
| 149 | pic->linesize[1] = pic->linesize[2] = w / 2; |
| 150 | pic->data[0] = utv->buffer; |
| 151 | pic->data[2] = utv->buffer + (w * h); |
| 152 | pic->data[1] = pic->data[2] + (w * h / 4); |
| 153 | break; |
| 154 | case AV_PIX_FMT_YUYV422: |
| 155 | pic->linesize[0] = w * 2; |
| 156 | pic->data[0] = utv->buffer; |
| 157 | break; |
| 158 | case AV_PIX_FMT_BGR24: |
| 159 | case AV_PIX_FMT_RGB32: |
| 160 | /* Make the linesize negative, since Ut Video uses bottom-up BGR */ |
| 161 | pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4); |
| 162 | pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0]; |
| 163 | break; |
| 164 | } |
| 165 | |
| 166 | *got_frame = 1; |
| 167 | av_frame_move_ref((AVFrame*)data, pic); |
| 168 | |
| 169 | return avpkt->size; |
| 170 | } |
| 171 | |
| 172 | static av_cold int utvideo_decode_close(AVCodecContext *avctx) |
| 173 | { |
| 174 | UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
| 175 | |
| 176 | /* Free output */ |
| 177 | av_frame_free(&avctx->coded_frame); |
| 178 | av_freep(&utv->buffer); |
| 179 | |
| 180 | /* Finish decoding and clean up the instance */ |
| 181 | utv->codec->DecodeEnd(); |
| 182 | CCodec::DeleteInstance(utv->codec); |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | AVCodec ff_libutvideo_decoder = { |
| 188 | "libutvideo", |
| 189 | NULL_IF_CONFIG_SMALL("Ut Video"), |
| 190 | AVMEDIA_TYPE_VIDEO, |
| 191 | AV_CODEC_ID_UTVIDEO, |
| 192 | 0, //capabilities |
| 193 | NULL, //supported_framerates |
| 194 | NULL, //pix_fmts |
| 195 | NULL, //supported_samplerates |
| 196 | NULL, //sample_fmts |
| 197 | NULL, //channel_layouts |
| 198 | 0, //max_lowres |
| 199 | NULL, //priv_class |
| 200 | NULL, //profiles |
| 201 | sizeof(UtVideoContext), |
| 202 | NULL, //next |
| 203 | NULL, //init_thread_copy |
| 204 | NULL, //update_thread_context |
| 205 | NULL, //defaults |
| 206 | NULL, //init_static_data |
| 207 | utvideo_decode_init, |
| 208 | NULL, //encode |
| 209 | NULL, //encode2 |
| 210 | utvideo_decode_frame, |
| 211 | utvideo_decode_close, |
| 212 | }; |