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;
44 switch (avctx->pix_fmt) {
45 case AV_PIX_FMT_YUV420P:
46 in_format = UTVF_YV12;
47 avctx->bits_per_coded_sample = 12;
48 if (avctx->colorspace == AVCOL_SPC_BT709)
49 avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
51 avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
53 case AV_PIX_FMT_YUYV422:
54 in_format = UTVF_YUYV;
55 avctx->bits_per_coded_sample = 16;
56 if (avctx->colorspace == AVCOL_SPC_BT709)
57 avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
59 avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
61 case AV_PIX_FMT_BGR24:
62 in_format = UTVF_NFCC_BGR_BU;
63 avctx->bits_per_coded_sample = 24;
64 avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
66 case AV_PIX_FMT_RGB32:
67 in_format = UTVF_NFCC_BGRA_BU;
68 avctx->bits_per_coded_sample = 32;
69 avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
72 return AVERROR(EINVAL);
75 /* Check before we alloc anything */
76 if (avctx->prediction_method != 0 && avctx->prediction_method != 2) {
77 av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
78 return AVERROR(EINVAL);
81 flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
83 avctx->priv_data = utv;
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 ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
104 utv->buffer = (uint8_t *)av_malloc(utv->buf_size);
106 if (utv->buffer == NULL) {
107 av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
109 return AVERROR(ENOMEM);
113 * Create a Ut Video instance. Since the function wants
114 * an "interface name" string, pass it the name of the lib.
116 utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
118 /* Initialize encoder */
119 utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
120 CBGROSSWIDTH_WINDOWS);
122 /* Get extradata from encoder */
123 avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
124 utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
125 avctx->width, avctx->height,
126 CBGROSSWIDTH_WINDOWS);
127 avctx->extradata = (uint8_t *)info;
130 utv->codec->SetState(&flags, sizeof(flags));
135 static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
136 const AVFrame *pic, int *got_packet)
138 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
139 int w = avctx->width, h = avctx->height;
140 int ret, rgb_size, i;
146 if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
151 /* Move input if needed data into Ut Video friendly buffer */
152 switch (avctx->pix_fmt) {
153 case AV_PIX_FMT_YUV420P:
157 for (i = 0; i < h; i++) {
158 memcpy(y, pic->data[0] + i * pic->linesize[0], w);
161 for (i = 0; i < h / 2; i++) {
162 memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
163 memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
168 case AV_PIX_FMT_YUYV422:
169 for (i = 0; i < h; i++)
170 memcpy(utv->buffer + i * (w << 1),
171 pic->data[0] + i * pic->linesize[0], w << 1);
173 case AV_PIX_FMT_BGR24:
174 case AV_PIX_FMT_RGB32:
175 /* Ut Video takes bottom-up BGR */
176 rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
177 for (i = 0; i < h; i++)
178 memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
179 pic->data[0] + i * pic->linesize[0],
183 return AVERROR(EINVAL);
187 pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
190 av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
191 return AVERROR_INVALIDDATA;
195 * Ut Video is intra-only and every frame is a keyframe,
196 * and the API always returns true. In case something
197 * durastic changes in the future, such as inter support,
198 * assert that this is true.
200 av_assert2(keyframe == true);
202 pkt->flags |= AV_PKT_FLAG_KEY;
207 static av_cold int utvideo_encode_close(AVCodecContext *avctx)
209 UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
211 av_freep(&avctx->extradata);
212 av_freep(&utv->buffer);
214 utv->codec->EncodeEnd();
215 CCodec::DeleteInstance(utv->codec);
220 AVCodec ff_libutvideo_encoder = {
222 NULL_IF_CONFIG_SMALL("Ut Video"),
225 AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_LOSSLESS | AV_CODEC_CAP_INTRA_ONLY,
226 NULL, /* supported_framerates */
227 (const enum AVPixelFormat[]) {
228 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
229 AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
231 NULL, /* supported_samplerates */
232 NULL, /* sample_fmts */
233 NULL, /* channel_layouts */
235 NULL, /* priv_class */
237 sizeof(UtVideoContext),
239 NULL, /* init_thread_copy */
240 NULL, /* update_thread_context */
242 NULL, /* init_static_data */
245 utvideo_encode_frame,
247 utvideo_encode_close,