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 av_reduce(&raten, &rated, st->codec->time_base.den,
42 st->codec->time_base.num, (1UL << 31) - 1);
44 aspectn = st->sample_aspect_ratio.num;
45 aspectd = st->sample_aspect_ratio.den;
47 if (aspectn == 0 && aspectd == 1)
48 aspectd = 0; // 0:0 means unknown
50 inter = 'p'; /* progressive is the default */
51 if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
52 inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
53 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
55 } else if (st->codec->field_order == AV_FIELD_TB || st->codec->field_order == AV_FIELD_TT) {
57 } else if (st->codec->field_order == AV_FIELD_BT || st->codec->field_order == AV_FIELD_BB) {
61 switch (st->codec->pix_fmt) {
62 case AV_PIX_FMT_GRAY8:
63 colorspace = " Cmono";
65 case AV_PIX_FMT_GRAY16:
66 colorspace = " Cmono16";
68 case AV_PIX_FMT_YUV411P:
69 colorspace = " C411 XYSCSS=411";
71 case AV_PIX_FMT_YUV420P:
72 switch (st->codec->chroma_sample_location) {
73 case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
74 case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
75 default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
78 case AV_PIX_FMT_YUV422P:
79 colorspace = " C422 XYSCSS=422";
81 case AV_PIX_FMT_YUV444P:
82 colorspace = " C444 XYSCSS=444";
84 case AV_PIX_FMT_YUV420P9:
85 colorspace = " C420p9 XYSCSS=420P9";
87 case AV_PIX_FMT_YUV422P9:
88 colorspace = " C422p9 XYSCSS=422P9";
90 case AV_PIX_FMT_YUV444P9:
91 colorspace = " C444p9 XYSCSS=444P9";
93 case AV_PIX_FMT_YUV420P10:
94 colorspace = " C420p10 XYSCSS=420P10";
96 case AV_PIX_FMT_YUV422P10:
97 colorspace = " C422p10 XYSCSS=422P10";
99 case AV_PIX_FMT_YUV444P10:
100 colorspace = " C444p10 XYSCSS=444P10";
102 case AV_PIX_FMT_YUV420P12:
103 colorspace = " C420p12 XYSCSS=420P12";
105 case AV_PIX_FMT_YUV422P12:
106 colorspace = " C422p12 XYSCSS=422P12";
108 case AV_PIX_FMT_YUV444P12:
109 colorspace = " C444p12 XYSCSS=444P12";
111 case AV_PIX_FMT_YUV420P14:
112 colorspace = " C420p14 XYSCSS=420P14";
114 case AV_PIX_FMT_YUV422P14:
115 colorspace = " C422p14 XYSCSS=422P14";
117 case AV_PIX_FMT_YUV444P14:
118 colorspace = " C444p14 XYSCSS=444P14";
120 case AV_PIX_FMT_YUV420P16:
121 colorspace = " C420p16 XYSCSS=420P16";
123 case AV_PIX_FMT_YUV422P16:
124 colorspace = " C422p16 XYSCSS=422P16";
126 case AV_PIX_FMT_YUV444P16:
127 colorspace = " C444p16 XYSCSS=444P16";
131 /* construct stream header, if this is the first frame */
132 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
133 Y4M_MAGIC, width, height, raten, rated, inter,
134 aspectn, aspectd, colorspace);
139 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
141 AVStream *st = s->streams[pkt->stream_index];
142 AVIOContext *pb = s->pb;
143 AVPicture *picture, picture_tmp;
144 int* first_pkt = s->priv_data;
145 int width, height, h_chroma_shift, v_chroma_shift;
147 char buf2[Y4M_LINE_MAX + 1];
149 uint8_t *ptr, *ptr1, *ptr2;
151 memcpy(&picture_tmp, pkt->data, sizeof(AVPicture));
152 picture = &picture_tmp;
154 /* for the first packet we have to output the header as well */
157 if (yuv4_generate_header(s, buf2) < 0) {
158 av_log(s, AV_LOG_ERROR,
159 "Error. YUV4MPEG stream header write failed.\n");
162 avio_write(pb, buf2, strlen(buf2));
166 /* construct frame header */
168 snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
169 avio_write(pb, buf1, strlen(buf1));
171 width = st->codec->width;
172 height = st->codec->height;
174 ptr = picture->data[0];
176 switch (st->codec->pix_fmt) {
177 case AV_PIX_FMT_GRAY8:
178 case AV_PIX_FMT_YUV411P:
179 case AV_PIX_FMT_YUV420P:
180 case AV_PIX_FMT_YUV422P:
181 case AV_PIX_FMT_YUV444P:
183 case AV_PIX_FMT_GRAY16:
184 case AV_PIX_FMT_YUV420P9:
185 case AV_PIX_FMT_YUV422P9:
186 case AV_PIX_FMT_YUV444P9:
187 case AV_PIX_FMT_YUV420P10:
188 case AV_PIX_FMT_YUV422P10:
189 case AV_PIX_FMT_YUV444P10:
190 case AV_PIX_FMT_YUV420P12:
191 case AV_PIX_FMT_YUV422P12:
192 case AV_PIX_FMT_YUV444P12:
193 case AV_PIX_FMT_YUV420P14:
194 case AV_PIX_FMT_YUV422P14:
195 case AV_PIX_FMT_YUV444P14:
196 case AV_PIX_FMT_YUV420P16:
197 case AV_PIX_FMT_YUV422P16:
198 case AV_PIX_FMT_YUV444P16:
202 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
203 av_get_pix_fmt_name(st->codec->pix_fmt));
204 return AVERROR(EINVAL);
207 for (i = 0; i < height; i++) {
208 avio_write(pb, ptr, width);
209 ptr += picture->linesize[0];
212 if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
213 st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
214 // Adjust for smaller Cb and Cr planes
215 av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
217 width = FF_CEIL_RSHIFT(width, h_chroma_shift);
218 height = FF_CEIL_RSHIFT(height, v_chroma_shift);
220 ptr1 = picture->data[1];
221 ptr2 = picture->data[2];
222 for (i = 0; i < height; i++) { /* Cb */
223 avio_write(pb, ptr1, width);
224 ptr1 += picture->linesize[1];
226 for (i = 0; i < height; i++) { /* Cr */
227 avio_write(pb, ptr2, width);
228 ptr2 += picture->linesize[2];
235 static int yuv4_write_header(AVFormatContext *s)
237 int *first_pkt = s->priv_data;
239 if (s->nb_streams != 1)
242 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
243 av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
244 return AVERROR_INVALIDDATA;
247 switch (s->streams[0]->codec->pix_fmt) {
248 case AV_PIX_FMT_YUV411P:
249 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
250 "stream, some mjpegtools might not work.\n");
252 case AV_PIX_FMT_GRAY8:
253 case AV_PIX_FMT_GRAY16:
254 case AV_PIX_FMT_YUV420P:
255 case AV_PIX_FMT_YUV422P:
256 case AV_PIX_FMT_YUV444P:
258 case AV_PIX_FMT_YUV420P9:
259 case AV_PIX_FMT_YUV422P9:
260 case AV_PIX_FMT_YUV444P9:
261 case AV_PIX_FMT_YUV420P10:
262 case AV_PIX_FMT_YUV422P10:
263 case AV_PIX_FMT_YUV444P10:
264 case AV_PIX_FMT_YUV420P12:
265 case AV_PIX_FMT_YUV422P12:
266 case AV_PIX_FMT_YUV444P12:
267 case AV_PIX_FMT_YUV420P14:
268 case AV_PIX_FMT_YUV422P14:
269 case AV_PIX_FMT_YUV444P14:
270 case AV_PIX_FMT_YUV420P16:
271 case AV_PIX_FMT_YUV422P16:
272 case AV_PIX_FMT_YUV444P16:
273 if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
274 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
275 "Use '-strict -1' to encode to this pixel format.\n",
276 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
277 return AVERROR(EINVAL);
279 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
280 "Mjpegtools will not work.\n");
283 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
284 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
285 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
286 "yuv444p10, yuv422p10, yuv420p10, "
287 "yuv444p12, yuv422p12, yuv420p12, "
288 "yuv444p14, yuv422p14, yuv420p14, "
289 "yuv444p16, yuv422p16, yuv420p16 "
290 "and gray16 pixel formats. "
291 "Use -pix_fmt to select one.\n");
299 AVOutputFormat ff_yuv4mpegpipe_muxer = {
300 .name = "yuv4mpegpipe",
301 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
303 .priv_data_size = sizeof(int),
304 .audio_codec = AV_CODEC_ID_NONE,
305 .video_codec = AV_CODEC_ID_RAWVIDEO,
306 .write_header = yuv4_write_header,
307 .write_packet = yuv4_write_packet,
308 .flags = AVFMT_RAWPICTURE,