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 inter = 'p'; /* progressive is the default */
52 if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
53 inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
54 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
56 } else if (st->codec->field_order == AV_FIELD_TB || st->codec->field_order == AV_FIELD_TT) {
58 } else if (st->codec->field_order == AV_FIELD_BT || st->codec->field_order == AV_FIELD_BB) {
62 switch (st->codec->pix_fmt) {
63 case AV_PIX_FMT_GRAY8:
64 colorspace = " Cmono";
66 case AV_PIX_FMT_GRAY16:
67 colorspace = " Cmono16";
69 case AV_PIX_FMT_YUV411P:
70 colorspace = " C411 XYSCSS=411";
72 case AV_PIX_FMT_YUV420P:
73 switch (st->codec->chroma_sample_location) {
74 case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
75 case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
76 default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
79 case AV_PIX_FMT_YUV422P:
80 colorspace = " C422 XYSCSS=422";
82 case AV_PIX_FMT_YUV444P:
83 colorspace = " C444 XYSCSS=444";
85 case AV_PIX_FMT_YUV420P9:
86 colorspace = " C420p9 XYSCSS=420P9";
88 case AV_PIX_FMT_YUV422P9:
89 colorspace = " C422p9 XYSCSS=422P9";
91 case AV_PIX_FMT_YUV444P9:
92 colorspace = " C444p9 XYSCSS=444P9";
94 case AV_PIX_FMT_YUV420P10:
95 colorspace = " C420p10 XYSCSS=420P10";
97 case AV_PIX_FMT_YUV422P10:
98 colorspace = " C422p10 XYSCSS=422P10";
100 case AV_PIX_FMT_YUV444P10:
101 colorspace = " C444p10 XYSCSS=444P10";
103 case AV_PIX_FMT_YUV420P12:
104 colorspace = " C420p12 XYSCSS=420P12";
106 case AV_PIX_FMT_YUV422P12:
107 colorspace = " C422p12 XYSCSS=422P12";
109 case AV_PIX_FMT_YUV444P12:
110 colorspace = " C444p12 XYSCSS=444P12";
112 case AV_PIX_FMT_YUV420P14:
113 colorspace = " C420p14 XYSCSS=420P14";
115 case AV_PIX_FMT_YUV422P14:
116 colorspace = " C422p14 XYSCSS=422P14";
118 case AV_PIX_FMT_YUV444P14:
119 colorspace = " C444p14 XYSCSS=444P14";
121 case AV_PIX_FMT_YUV420P16:
122 colorspace = " C420p16 XYSCSS=420P16";
124 case AV_PIX_FMT_YUV422P16:
125 colorspace = " C422p16 XYSCSS=422P16";
127 case AV_PIX_FMT_YUV444P16:
128 colorspace = " C444p16 XYSCSS=444P16";
132 /* construct stream header, if this is the first frame */
133 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
134 Y4M_MAGIC, width, height, raten, rated, inter,
135 aspectn, aspectd, colorspace);
140 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
142 AVStream *st = s->streams[pkt->stream_index];
143 AVIOContext *pb = s->pb;
144 AVPicture *picture, picture_tmp;
145 int* first_pkt = s->priv_data;
146 int width, height, h_chroma_shift, v_chroma_shift;
148 char buf2[Y4M_LINE_MAX + 1];
150 uint8_t *ptr, *ptr1, *ptr2;
152 memcpy(&picture_tmp, pkt->data, sizeof(AVPicture));
153 picture = &picture_tmp;
155 /* for the first packet we have to output the header as well */
158 if (yuv4_generate_header(s, buf2) < 0) {
159 av_log(s, AV_LOG_ERROR,
160 "Error. YUV4MPEG stream header write failed.\n");
163 avio_write(pb, buf2, strlen(buf2));
167 /* construct frame header */
169 snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
170 avio_write(pb, buf1, strlen(buf1));
172 width = st->codec->width;
173 height = st->codec->height;
175 ptr = picture->data[0];
177 switch (st->codec->pix_fmt) {
178 case AV_PIX_FMT_GRAY8:
179 case AV_PIX_FMT_YUV411P:
180 case AV_PIX_FMT_YUV420P:
181 case AV_PIX_FMT_YUV422P:
182 case AV_PIX_FMT_YUV444P:
184 case AV_PIX_FMT_GRAY16:
185 case AV_PIX_FMT_YUV420P9:
186 case AV_PIX_FMT_YUV422P9:
187 case AV_PIX_FMT_YUV444P9:
188 case AV_PIX_FMT_YUV420P10:
189 case AV_PIX_FMT_YUV422P10:
190 case AV_PIX_FMT_YUV444P10:
191 case AV_PIX_FMT_YUV420P12:
192 case AV_PIX_FMT_YUV422P12:
193 case AV_PIX_FMT_YUV444P12:
194 case AV_PIX_FMT_YUV420P14:
195 case AV_PIX_FMT_YUV422P14:
196 case AV_PIX_FMT_YUV444P14:
197 case AV_PIX_FMT_YUV420P16:
198 case AV_PIX_FMT_YUV422P16:
199 case AV_PIX_FMT_YUV444P16:
203 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
204 av_get_pix_fmt_name(st->codec->pix_fmt));
205 return AVERROR(EINVAL);
208 for (i = 0; i < height; i++) {
209 avio_write(pb, ptr, width);
210 ptr += picture->linesize[0];
213 if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
214 st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
215 // Adjust for smaller Cb and Cr planes
216 av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
218 width = FF_CEIL_RSHIFT(width, h_chroma_shift);
219 height = FF_CEIL_RSHIFT(height, v_chroma_shift);
221 ptr1 = picture->data[1];
222 ptr2 = picture->data[2];
223 for (i = 0; i < height; i++) { /* Cb */
224 avio_write(pb, ptr1, width);
225 ptr1 += picture->linesize[1];
227 for (i = 0; i < height; i++) { /* Cr */
228 avio_write(pb, ptr2, width);
229 ptr2 += picture->linesize[2];
236 static int yuv4_write_header(AVFormatContext *s)
238 int *first_pkt = s->priv_data;
240 if (s->nb_streams != 1)
243 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
244 av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
245 return AVERROR_INVALIDDATA;
248 switch (s->streams[0]->codec->pix_fmt) {
249 case AV_PIX_FMT_YUV411P:
250 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
251 "stream, some mjpegtools might not work.\n");
253 case AV_PIX_FMT_GRAY8:
254 case AV_PIX_FMT_GRAY16:
255 case AV_PIX_FMT_YUV420P:
256 case AV_PIX_FMT_YUV422P:
257 case AV_PIX_FMT_YUV444P:
259 case AV_PIX_FMT_YUV420P9:
260 case AV_PIX_FMT_YUV422P9:
261 case AV_PIX_FMT_YUV444P9:
262 case AV_PIX_FMT_YUV420P10:
263 case AV_PIX_FMT_YUV422P10:
264 case AV_PIX_FMT_YUV444P10:
265 case AV_PIX_FMT_YUV420P12:
266 case AV_PIX_FMT_YUV422P12:
267 case AV_PIX_FMT_YUV444P12:
268 case AV_PIX_FMT_YUV420P14:
269 case AV_PIX_FMT_YUV422P14:
270 case AV_PIX_FMT_YUV444P14:
271 case AV_PIX_FMT_YUV420P16:
272 case AV_PIX_FMT_YUV422P16:
273 case AV_PIX_FMT_YUV444P16:
274 if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
275 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
276 "Use '-strict -1' to encode to this pixel format.\n",
277 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
278 return AVERROR(EINVAL);
280 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
281 "Mjpegtools will not work.\n");
284 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
285 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
286 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
287 "yuv444p10, yuv422p10, yuv420p10, "
288 "yuv444p12, yuv422p12, yuv420p12, "
289 "yuv444p14, yuv422p14, yuv420p14, "
290 "yuv444p16, yuv422p16, yuv420p16 "
291 "and gray16 pixel formats. "
292 "Use -pix_fmt to select one.\n");
300 AVOutputFormat ff_yuv4mpegpipe_muxer = {
301 .name = "yuv4mpegpipe",
302 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
304 .priv_data_size = sizeof(int),
305 .audio_codec = AV_CODEC_ID_NONE,
306 .video_codec = AV_CODEC_ID_RAWVIDEO,
307 .write_header = yuv4_write_header,
308 .write_packet = yuv4_write_packet,
309 .flags = AVFMT_RAWPICTURE,