3 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/pixdesc.h"
27 #define Y4M_LINE_MAX 256
29 static int yuv4_generate_header(AVFormatContext *s, char* buf)
33 int raten, rated, aspectn, aspectd, n;
35 const char *colorspace = "";
38 width = st->codec->width;
39 height = st->codec->height;
41 // TODO: should be avg_frame_rate
42 av_reduce(&raten, &rated, st->time_base.den,
43 st->time_base.num, (1UL << 31) - 1);
45 aspectn = st->sample_aspect_ratio.num;
46 aspectd = st->sample_aspect_ratio.den;
48 if (aspectn == 0 && aspectd == 1)
49 aspectd = 0; // 0:0 means unknown
51 switch (st->codec->field_order) {
53 case AV_FIELD_TT: inter = 't'; break;
55 case AV_FIELD_BB: inter = 'b'; break;
56 default: inter = 'p'; break;
59 switch (st->codec->pix_fmt) {
60 case AV_PIX_FMT_GRAY8:
61 colorspace = " Cmono";
63 case AV_PIX_FMT_GRAY16:
64 colorspace = " Cmono16";
66 case AV_PIX_FMT_YUV411P:
67 colorspace = " C411 XYSCSS=411";
69 case AV_PIX_FMT_YUV420P:
70 switch (st->codec->chroma_sample_location) {
71 case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
72 case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
73 default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
76 case AV_PIX_FMT_YUV422P:
77 colorspace = " C422 XYSCSS=422";
79 case AV_PIX_FMT_YUV444P:
80 colorspace = " C444 XYSCSS=444";
82 case AV_PIX_FMT_YUV420P9:
83 colorspace = " C420p9 XYSCSS=420P9";
85 case AV_PIX_FMT_YUV422P9:
86 colorspace = " C422p9 XYSCSS=422P9";
88 case AV_PIX_FMT_YUV444P9:
89 colorspace = " C444p9 XYSCSS=444P9";
91 case AV_PIX_FMT_YUV420P10:
92 colorspace = " C420p10 XYSCSS=420P10";
94 case AV_PIX_FMT_YUV422P10:
95 colorspace = " C422p10 XYSCSS=422P10";
97 case AV_PIX_FMT_YUV444P10:
98 colorspace = " C444p10 XYSCSS=444P10";
100 case AV_PIX_FMT_YUV420P12:
101 colorspace = " C420p12 XYSCSS=420P12";
103 case AV_PIX_FMT_YUV422P12:
104 colorspace = " C422p12 XYSCSS=422P12";
106 case AV_PIX_FMT_YUV444P12:
107 colorspace = " C444p12 XYSCSS=444P12";
109 case AV_PIX_FMT_YUV420P14:
110 colorspace = " C420p14 XYSCSS=420P14";
112 case AV_PIX_FMT_YUV422P14:
113 colorspace = " C422p14 XYSCSS=422P14";
115 case AV_PIX_FMT_YUV444P14:
116 colorspace = " C444p14 XYSCSS=444P14";
118 case AV_PIX_FMT_YUV420P16:
119 colorspace = " C420p16 XYSCSS=420P16";
121 case AV_PIX_FMT_YUV422P16:
122 colorspace = " C422p16 XYSCSS=422P16";
124 case AV_PIX_FMT_YUV444P16:
125 colorspace = " C444p16 XYSCSS=444P16";
129 /* construct stream header, if this is the first frame */
130 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
131 Y4M_MAGIC, width, height, raten, rated, inter,
132 aspectn, aspectd, colorspace);
137 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
139 AVStream *st = s->streams[pkt->stream_index];
140 AVIOContext *pb = s->pb;
142 int* first_pkt = s->priv_data;
143 int width, height, h_chroma_shift, v_chroma_shift;
145 char buf2[Y4M_LINE_MAX + 1];
146 uint8_t *ptr, *ptr1, *ptr2;
148 frame = (AVFrame *)pkt->data;
150 /* for the first packet we have to output the header as well */
153 if (yuv4_generate_header(s, buf2) < 0) {
154 av_log(s, AV_LOG_ERROR,
155 "Error. YUV4MPEG stream header write failed.\n");
158 avio_write(pb, buf2, strlen(buf2));
162 /* construct frame header */
164 avio_printf(s->pb, "%s\n", Y4M_FRAME_MAGIC);
166 width = st->codec->width;
167 height = st->codec->height;
169 ptr = frame->data[0];
171 switch (st->codec->pix_fmt) {
172 case AV_PIX_FMT_GRAY8:
173 case AV_PIX_FMT_YUV411P:
174 case AV_PIX_FMT_YUV420P:
175 case AV_PIX_FMT_YUV422P:
176 case AV_PIX_FMT_YUV444P:
178 case AV_PIX_FMT_GRAY16:
179 case AV_PIX_FMT_YUV420P9:
180 case AV_PIX_FMT_YUV422P9:
181 case AV_PIX_FMT_YUV444P9:
182 case AV_PIX_FMT_YUV420P10:
183 case AV_PIX_FMT_YUV422P10:
184 case AV_PIX_FMT_YUV444P10:
185 case AV_PIX_FMT_YUV420P12:
186 case AV_PIX_FMT_YUV422P12:
187 case AV_PIX_FMT_YUV444P12:
188 case AV_PIX_FMT_YUV420P14:
189 case AV_PIX_FMT_YUV422P14:
190 case AV_PIX_FMT_YUV444P14:
191 case AV_PIX_FMT_YUV420P16:
192 case AV_PIX_FMT_YUV422P16:
193 case AV_PIX_FMT_YUV444P16:
197 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
198 av_get_pix_fmt_name(st->codec->pix_fmt));
199 return AVERROR(EINVAL);
202 for (i = 0; i < height; i++) {
203 avio_write(pb, ptr, width);
204 ptr += frame->linesize[0];
207 if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
208 st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
209 // Adjust for smaller Cb and Cr planes
210 av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
212 width = FF_CEIL_RSHIFT(width, h_chroma_shift);
213 height = FF_CEIL_RSHIFT(height, v_chroma_shift);
215 ptr1 = frame->data[1];
216 ptr2 = frame->data[2];
217 for (i = 0; i < height; i++) { /* Cb */
218 avio_write(pb, ptr1, width);
219 ptr1 += frame->linesize[1];
221 for (i = 0; i < height; i++) { /* Cr */
222 avio_write(pb, ptr2, width);
223 ptr2 += frame->linesize[2];
230 static int yuv4_write_header(AVFormatContext *s)
232 int *first_pkt = s->priv_data;
234 if (s->nb_streams != 1)
237 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
238 av_log(s, AV_LOG_ERROR, "ERROR: Codec not supported.\n");
239 return AVERROR_INVALIDDATA;
242 switch (s->streams[0]->codec->pix_fmt) {
243 case AV_PIX_FMT_YUV411P:
244 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
245 "stream, some mjpegtools might not work.\n");
247 case AV_PIX_FMT_GRAY8:
248 case AV_PIX_FMT_GRAY16:
249 case AV_PIX_FMT_YUV420P:
250 case AV_PIX_FMT_YUV422P:
251 case AV_PIX_FMT_YUV444P:
253 case AV_PIX_FMT_YUV420P9:
254 case AV_PIX_FMT_YUV422P9:
255 case AV_PIX_FMT_YUV444P9:
256 case AV_PIX_FMT_YUV420P10:
257 case AV_PIX_FMT_YUV422P10:
258 case AV_PIX_FMT_YUV444P10:
259 case AV_PIX_FMT_YUV420P12:
260 case AV_PIX_FMT_YUV422P12:
261 case AV_PIX_FMT_YUV444P12:
262 case AV_PIX_FMT_YUV420P14:
263 case AV_PIX_FMT_YUV422P14:
264 case AV_PIX_FMT_YUV444P14:
265 case AV_PIX_FMT_YUV420P16:
266 case AV_PIX_FMT_YUV422P16:
267 case AV_PIX_FMT_YUV444P16:
268 if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
269 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
270 "Use '-strict -1' to encode to this pixel format.\n",
271 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
272 return AVERROR(EINVAL);
274 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
275 "Mjpegtools will not work.\n");
278 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
279 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
280 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
281 "yuv444p10, yuv422p10, yuv420p10, "
282 "yuv444p12, yuv422p12, yuv420p12, "
283 "yuv444p14, yuv422p14, yuv420p14, "
284 "yuv444p16, yuv422p16, yuv420p16 "
285 "and gray16 pixel formats. "
286 "Use -pix_fmt to select one.\n");
294 AVOutputFormat ff_yuv4mpegpipe_muxer = {
295 .name = "yuv4mpegpipe",
296 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
298 .priv_data_size = sizeof(int),
299 .audio_codec = AV_CODEC_ID_NONE,
300 .video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
301 .write_header = yuv4_write_header,
302 .write_packet = yuv4_write_packet,