2 * Copyright (c) 2012 Derek Buitenhuis
4 * This file is part of FFmpeg.
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.
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.
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
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)
29 #include "libavutil/avassert.h"
30 #include "libavutil/imgutils.h"
35 #include "libutvideo.h"
38 static av_cold int utvideo_encode_init(AVCodecContext *avctx)
40 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
42 uint32_t flags, in_format;
45 switch (avctx->pix_fmt) {
46 case AV_PIX_FMT_YUV420P:
47 in_format = UTVF_YV12;
48 avctx->bits_per_coded_sample = 12;
49 if (avctx->colorspace == AVCOL_SPC_BT709)
50 avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
52 avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
54 case AV_PIX_FMT_YUYV422:
55 in_format = UTVF_YUYV;
56 avctx->bits_per_coded_sample = 16;
57 if (avctx->colorspace == AVCOL_SPC_BT709)
58 avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
60 avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
62 case AV_PIX_FMT_BGR24:
63 in_format = UTVF_NFCC_BGR_BU;
64 avctx->bits_per_coded_sample = 24;
65 avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
67 case AV_PIX_FMT_RGB32:
68 in_format = UTVF_NFCC_BGRA_BU;
69 avctx->bits_per_coded_sample = 32;
70 avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
73 return AVERROR(EINVAL);
76 #if FF_API_PRIVATE_OPT
77 FF_DISABLE_DEPRECATION_WARNINGS
78 if (avctx->prediction_method)
79 utv->pred = avctx->prediction_method;
80 FF_ENABLE_DEPRECATION_WARNINGS
83 /* Check before we alloc anything */
84 if (utv->pred != 0 && utv->pred != 2) {
85 av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
86 return AVERROR(EINVAL);
89 flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
91 avctx->priv_data = utv;
93 /* Alloc extradata buffer */
94 info = (UtVideoExtra *)av_malloc(sizeof(*info));
97 av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
98 return AVERROR(ENOMEM);
102 * We use this buffer to hold the data that Ut Video returns,
103 * since we cannot decode planes separately with it.
105 ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
112 utv->buffer = (uint8_t *)av_malloc(utv->buf_size);
114 if (utv->buffer == NULL) {
115 av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
117 return AVERROR(ENOMEM);
121 * Create a Ut Video instance. Since the function wants
122 * an "interface name" string, pass it the name of the lib.
124 utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
126 /* Initialize encoder */
127 utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
128 CBGROSSWIDTH_WINDOWS);
130 /* Get extradata from encoder */
131 avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
132 utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
133 avctx->width, avctx->height,
134 CBGROSSWIDTH_WINDOWS);
135 avctx->extradata = (uint8_t *)info;
138 utv->codec->SetState(&flags, sizeof(flags));
143 static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
144 const AVFrame *pic, int *got_packet)
146 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
147 int w = avctx->width, h = avctx->height;
148 int ret, rgb_size, i;
154 if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
159 /* Move input if needed data into Ut Video friendly buffer */
160 switch (avctx->pix_fmt) {
161 case AV_PIX_FMT_YUV420P:
165 for (i = 0; i < h; i++) {
166 memcpy(y, pic->data[0] + i * pic->linesize[0], w);
169 for (i = 0; i < h / 2; i++) {
170 memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
171 memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
176 case AV_PIX_FMT_YUYV422:
177 for (i = 0; i < h; i++)
178 memcpy(utv->buffer + i * (w << 1),
179 pic->data[0] + i * pic->linesize[0], w << 1);
181 case AV_PIX_FMT_BGR24:
182 case AV_PIX_FMT_RGB32:
183 /* Ut Video takes bottom-up BGR */
184 rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
185 for (i = 0; i < h; i++)
186 memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
187 pic->data[0] + i * pic->linesize[0],
191 return AVERROR(EINVAL);
195 pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
198 av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
199 return AVERROR_INVALIDDATA;
203 * Ut Video is intra-only and every frame is a keyframe,
204 * and the API always returns true. In case something
205 * durastic changes in the future, such as inter support,
206 * assert that this is true.
208 av_assert2(keyframe == true);
210 pkt->flags |= AV_PKT_FLAG_KEY;
215 static av_cold int utvideo_encode_close(AVCodecContext *avctx)
217 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
219 av_freep(&avctx->extradata);
220 av_freep(&utv->buffer);
222 utv->codec->EncodeEnd();
223 CCodec::DeleteInstance(utv->codec);
228 #define OFFSET(x) offsetof(UtVideoContext, x)
229 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
230 static const AVOption options[] = {
231 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, 0, 0, 2, VE, "pred" },
232 { "left", NULL, 0, AV_OPT_TYPE_CONST, 0, INT_MIN, INT_MAX, VE, "pred" },
233 { "median", NULL, 0, AV_OPT_TYPE_CONST, 2, INT_MIN, INT_MAX, VE, "pred" },
236 static const AVClass utvideo_class = {
238 av_default_item_name,
250 AVCodec ff_libutvideo_encoder = {
252 NULL_IF_CONFIG_SMALL("Ut Video"),
255 AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_LOSSLESS | AV_CODEC_CAP_INTRA_ONLY,
256 NULL, /* supported_framerates */
257 (const enum AVPixelFormat[]) {
258 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
259 AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
261 NULL, /* supported_samplerates */
262 NULL, /* sample_fmts */
263 NULL, /* channel_layouts */
265 &utvideo_class, /* priv_class */
267 sizeof(UtVideoContext),
269 NULL, /* init_thread_copy */
270 NULL, /* update_thread_context */
272 NULL, /* init_static_data */
275 utvideo_encode_frame,
277 utvideo_encode_close,