1/* 2 * Copyright (c) 2012 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 28extern "C" { 29#include "libavutil/avassert.h" 30#include "avcodec.h" 31#include "internal.h" 32} 33 34#include "libutvideo.h" 35#include "put_bits.h" 36 37static av_cold int utvideo_encode_init(AVCodecContext *avctx) 38{ 39 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; 40 UtVideoExtra *info; 41 uint32_t flags, in_format; 42 43 switch (avctx->pix_fmt) { 44 case AV_PIX_FMT_YUV420P: 45 in_format = UTVF_YV12; 46 avctx->bits_per_coded_sample = 12; 47 if (avctx->colorspace == AVCOL_SPC_BT709) 48 avctx->codec_tag = MKTAG('U', 'L', 'H', '0'); 49 else 50 avctx->codec_tag = MKTAG('U', 'L', 'Y', '0'); 51 break; 52 case AV_PIX_FMT_YUYV422: 53 in_format = UTVF_YUYV; 54 avctx->bits_per_coded_sample = 16; 55 if (avctx->colorspace == AVCOL_SPC_BT709) 56 avctx->codec_tag = MKTAG('U', 'L', 'H', '2'); 57 else 58 avctx->codec_tag = MKTAG('U', 'L', 'Y', '2'); 59 break; 60 case AV_PIX_FMT_BGR24: 61 in_format = UTVF_NFCC_BGR_BU; 62 avctx->bits_per_coded_sample = 24; 63 avctx->codec_tag = MKTAG('U', 'L', 'R', 'G'); 64 break; 65 case AV_PIX_FMT_RGB32: 66 in_format = UTVF_NFCC_BGRA_BU; 67 avctx->bits_per_coded_sample = 32; 68 avctx->codec_tag = MKTAG('U', 'L', 'R', 'A'); 69 break; 70 default: 71 return AVERROR(EINVAL); 72 } 73 74 /* Check before we alloc anything */ 75 if (avctx->prediction_method != 0 && avctx->prediction_method != 2) { 76 av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n"); 77 return AVERROR(EINVAL); 78 } 79 80 flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1); 81 82 avctx->priv_data = utv; 83 avctx->coded_frame = av_frame_alloc(); 84 85 /* Alloc extradata buffer */ 86 info = (UtVideoExtra *)av_malloc(sizeof(*info)); 87 88 if (info == NULL) { 89 av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n"); 90 return AVERROR(ENOMEM); 91 } 92 93 /* 94 * We use this buffer to hold the data that Ut Video returns, 95 * since we cannot decode planes separately with it. 96 */ 97 utv->buf_size = avpicture_get_size(avctx->pix_fmt, 98 avctx->width, avctx->height); 99 utv->buffer = (uint8_t *)av_malloc(utv->buf_size); 100 101 if (utv->buffer == NULL) { 102 av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n"); 103 return AVERROR(ENOMEM); 104 } 105 106 /* 107 * Create a Ut Video instance. Since the function wants 108 * an "interface name" string, pass it the name of the lib. 109 */ 110 utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec"); 111 112 /* Initialize encoder */ 113 utv->codec->EncodeBegin(in_format, avctx->width, avctx->height, 114 CBGROSSWIDTH_WINDOWS); 115 116 /* Get extradata from encoder */ 117 avctx->extradata_size = utv->codec->EncodeGetExtraDataSize(); 118 utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format, 119 avctx->width, avctx->height, 120 CBGROSSWIDTH_WINDOWS); 121 avctx->extradata = (uint8_t *)info; 122 123 /* Set flags */ 124 utv->codec->SetState(&flags, sizeof(flags)); 125 126 return 0; 127} 128 129static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 130 const AVFrame *pic, int *got_packet) 131{ 132 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; 133 int w = avctx->width, h = avctx->height; 134 int ret, rgb_size, i; 135 bool keyframe; 136 uint8_t *y, *u, *v; 137 uint8_t *dst; 138 139 /* Alloc buffer */ 140 if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size)) < 0) 141 return ret; 142 143 dst = pkt->data; 144 145 /* Move input if needed data into Ut Video friendly buffer */ 146 switch (avctx->pix_fmt) { 147 case AV_PIX_FMT_YUV420P: 148 y = utv->buffer; 149 u = y + w * h; 150 v = u + w * h / 4; 151 for (i = 0; i < h; i++) { 152 memcpy(y, pic->data[0] + i * pic->linesize[0], w); 153 y += w; 154 } 155 for (i = 0; i < h / 2; i++) { 156 memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1); 157 memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1); 158 u += w >> 1; 159 v += w >> 1; 160 } 161 break; 162 case AV_PIX_FMT_YUYV422: 163 for (i = 0; i < h; i++) 164 memcpy(utv->buffer + i * (w << 1), 165 pic->data[0] + i * pic->linesize[0], w << 1); 166 break; 167 case AV_PIX_FMT_BGR24: 168 case AV_PIX_FMT_RGB32: 169 /* Ut Video takes bottom-up BGR */ 170 rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4; 171 for (i = 0; i < h; i++) 172 memcpy(utv->buffer + (h - i - 1) * w * rgb_size, 173 pic->data[0] + i * pic->linesize[0], 174 w * rgb_size); 175 break; 176 default: 177 return AVERROR(EINVAL); 178 } 179 180 /* Encode frame */ 181 pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer); 182 183 if (!pkt->size) { 184 av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n"); 185 return AVERROR_INVALIDDATA; 186 } 187 188 /* 189 * Ut Video is intra-only and every frame is a keyframe, 190 * and the API always returns true. In case something 191 * durastic changes in the future, such as inter support, 192 * assert that this is true. 193 */ 194 av_assert2(keyframe == true); 195 avctx->coded_frame->key_frame = 1; 196 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 197 198 pkt->flags |= AV_PKT_FLAG_KEY; 199 *got_packet = 1; 200 return 0; 201} 202 203static av_cold int utvideo_encode_close(AVCodecContext *avctx) 204{ 205 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; 206 207 av_freep(&avctx->coded_frame); 208 av_freep(&avctx->extradata); 209 av_freep(&utv->buffer); 210 211 utv->codec->EncodeEnd(); 212 CCodec::DeleteInstance(utv->codec); 213 214 return 0; 215} 216 217AVCodec ff_libutvideo_encoder = { 218 "libutvideo", 219 NULL_IF_CONFIG_SMALL("Ut Video"), 220 AVMEDIA_TYPE_VIDEO, 221 AV_CODEC_ID_UTVIDEO, 222 CODEC_CAP_AUTO_THREADS | CODEC_CAP_LOSSLESS, 223 NULL, /* supported_framerates */ 224 (const enum AVPixelFormat[]) { 225 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24, 226 AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE 227 }, 228 NULL, /* supported_samplerates */ 229 NULL, /* sample_fmts */ 230 NULL, /* channel_layouts */ 231 0, /* max_lowres */ 232 NULL, /* priv_class */ 233 NULL, /* profiles */ 234 sizeof(UtVideoContext), 235 NULL, /* next */ 236 NULL, /* init_thread_copy */ 237 NULL, /* update_thread_context */ 238 NULL, /* defaults */ 239 NULL, /* init_static_data */ 240 utvideo_encode_init, 241 NULL, /* encode */ 242 utvideo_encode_frame, 243 NULL, /* decode */ 244 utvideo_encode_close, 245 NULL, /* flush */ 246}; 247