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"
34 #include "libutvideo.h"
37 static av_cold int utvideo_encode_init(AVCodecContext *avctx)
39 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
41 uint32_t flags, in_format;
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');
50 avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
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');
58 avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
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');
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');
71 return AVERROR(EINVAL);
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);
80 flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
82 avctx->priv_data = utv;
83 avctx->coded_frame = av_frame_alloc();
85 /* Alloc extradata buffer */
86 info = (UtVideoExtra *)av_malloc(sizeof(*info));
89 av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
90 return AVERROR(ENOMEM);
94 * We use this buffer to hold the data that Ut Video returns,
95 * since we cannot decode planes separately with it.
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);
101 if (utv->buffer == NULL) {
102 av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
103 return AVERROR(ENOMEM);
107 * Create a Ut Video instance. Since the function wants
108 * an "interface name" string, pass it the name of the lib.
110 utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
112 /* Initialize encoder */
113 utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
114 CBGROSSWIDTH_WINDOWS);
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;
124 utv->codec->SetState(&flags, sizeof(flags));
129 static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
130 const AVFrame *pic, int *got_packet)
132 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
133 int w = avctx->width, h = avctx->height;
134 int ret, rgb_size, i;
140 if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size)) < 0)
145 /* Move input if needed data into Ut Video friendly buffer */
146 switch (avctx->pix_fmt) {
147 case AV_PIX_FMT_YUV420P:
151 for (i = 0; i < h; i++) {
152 memcpy(y, pic->data[0] + i * pic->linesize[0], w);
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);
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);
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],
177 return AVERROR(EINVAL);
181 pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
184 av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
185 return AVERROR_INVALIDDATA;
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.
194 av_assert2(keyframe == true);
195 avctx->coded_frame->key_frame = 1;
196 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
198 pkt->flags |= AV_PKT_FLAG_KEY;
203 static av_cold int utvideo_encode_close(AVCodecContext *avctx)
205 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
207 av_freep(&avctx->coded_frame);
208 av_freep(&avctx->extradata);
209 av_freep(&utv->buffer);
211 utv->codec->EncodeEnd();
212 CCodec::DeleteInstance(utv->codec);
217 AVCodec ff_libutvideo_encoder = {
219 NULL_IF_CONFIG_SMALL("Ut Video"),
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
228 NULL, /* supported_samplerates */
229 NULL, /* sample_fmts */
230 NULL, /* channel_layouts */
232 NULL, /* priv_class */
234 sizeof(UtVideoContext),
236 NULL, /* init_thread_copy */
237 NULL, /* update_thread_context */
239 NULL, /* init_static_data */
242 utvideo_encode_frame,
244 utvideo_encode_close,