1 /*
2 * YUV4MPEG muxer
3 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include "libavutil/pixdesc.h"
23 #include "avformat.h"
24 #include "internal.h"
25 #include "yuv4mpeg.h"
26
27 #define Y4M_LINE_MAX 256
28
yuv4_generate_header(AVFormatContext * s,char * buf)29 static int yuv4_generate_header(AVFormatContext *s, char* buf)
30 {
31 AVStream *st;
32 int width, height;
33 int raten, rated, aspectn, aspectd, n;
34 char inter;
35 const char *colorspace = "";
36
37 st = s->streams[0];
38 width = st->codec->width;
39 height = st->codec->height;
40
41 // TODO: should be avg_frame_rate
42 av_reduce(&raten, &rated, st->time_base.den,
43 st->time_base.num, (1UL << 31) - 1);
44
45 aspectn = st->sample_aspect_ratio.num;
46 aspectd = st->sample_aspect_ratio.den;
47
48 if (aspectn == 0 && aspectd == 1)
49 aspectd = 0; // 0:0 means unknown
50
51 switch (st->codec->field_order) {
52 case AV_FIELD_TB:
53 case AV_FIELD_TT: inter = 't'; break;
54 case AV_FIELD_BT:
55 case AV_FIELD_BB: inter = 'b'; break;
56 default: inter = 'p'; break;
57 }
58
59 switch (st->codec->pix_fmt) {
60 case AV_PIX_FMT_GRAY8:
61 colorspace = " Cmono";
62 break;
63 case AV_PIX_FMT_GRAY16:
64 colorspace = " Cmono16";
65 break;
66 case AV_PIX_FMT_YUV411P:
67 colorspace = " C411 XYSCSS=411";
68 break;
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;
74 }
75 break;
76 case AV_PIX_FMT_YUV422P:
77 colorspace = " C422 XYSCSS=422";
78 break;
79 case AV_PIX_FMT_YUV444P:
80 colorspace = " C444 XYSCSS=444";
81 break;
82 case AV_PIX_FMT_YUV420P9:
83 colorspace = " C420p9 XYSCSS=420P9";
84 break;
85 case AV_PIX_FMT_YUV422P9:
86 colorspace = " C422p9 XYSCSS=422P9";
87 break;
88 case AV_PIX_FMT_YUV444P9:
89 colorspace = " C444p9 XYSCSS=444P9";
90 break;
91 case AV_PIX_FMT_YUV420P10:
92 colorspace = " C420p10 XYSCSS=420P10";
93 break;
94 case AV_PIX_FMT_YUV422P10:
95 colorspace = " C422p10 XYSCSS=422P10";
96 break;
97 case AV_PIX_FMT_YUV444P10:
98 colorspace = " C444p10 XYSCSS=444P10";
99 break;
100 case AV_PIX_FMT_YUV420P12:
101 colorspace = " C420p12 XYSCSS=420P12";
102 break;
103 case AV_PIX_FMT_YUV422P12:
104 colorspace = " C422p12 XYSCSS=422P12";
105 break;
106 case AV_PIX_FMT_YUV444P12:
107 colorspace = " C444p12 XYSCSS=444P12";
108 break;
109 case AV_PIX_FMT_YUV420P14:
110 colorspace = " C420p14 XYSCSS=420P14";
111 break;
112 case AV_PIX_FMT_YUV422P14:
113 colorspace = " C422p14 XYSCSS=422P14";
114 break;
115 case AV_PIX_FMT_YUV444P14:
116 colorspace = " C444p14 XYSCSS=444P14";
117 break;
118 case AV_PIX_FMT_YUV420P16:
119 colorspace = " C420p16 XYSCSS=420P16";
120 break;
121 case AV_PIX_FMT_YUV422P16:
122 colorspace = " C422p16 XYSCSS=422P16";
123 break;
124 case AV_PIX_FMT_YUV444P16:
125 colorspace = " C444p16 XYSCSS=444P16";
126 break;
127 }
128
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);
133
134 return n;
135 }
136
yuv4_write_packet(AVFormatContext * s,AVPacket * pkt)137 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
138 {
139 AVStream *st = s->streams[pkt->stream_index];
140 AVIOContext *pb = s->pb;
141 AVPicture *picture, picture_tmp;
142 int* first_pkt = s->priv_data;
143 int width, height, h_chroma_shift, v_chroma_shift;
144 int i;
145 char buf2[Y4M_LINE_MAX + 1];
146 char buf1[20];
147 uint8_t *ptr, *ptr1, *ptr2;
148
149 memcpy(&picture_tmp, pkt->data, sizeof(AVPicture));
150 picture = &picture_tmp;
151
152 /* for the first packet we have to output the header as well */
153 if (*first_pkt) {
154 *first_pkt = 0;
155 if (yuv4_generate_header(s, buf2) < 0) {
156 av_log(s, AV_LOG_ERROR,
157 "Error. YUV4MPEG stream header write failed.\n");
158 return AVERROR(EIO);
159 } else {
160 avio_write(pb, buf2, strlen(buf2));
161 }
162 }
163
164 /* construct frame header */
165
166 snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
167 avio_write(pb, buf1, strlen(buf1));
168
169 width = st->codec->width;
170 height = st->codec->height;
171
172 ptr = picture->data[0];
173
174 switch (st->codec->pix_fmt) {
175 case AV_PIX_FMT_GRAY8:
176 case AV_PIX_FMT_YUV411P:
177 case AV_PIX_FMT_YUV420P:
178 case AV_PIX_FMT_YUV422P:
179 case AV_PIX_FMT_YUV444P:
180 break;
181 case AV_PIX_FMT_GRAY16:
182 case AV_PIX_FMT_YUV420P9:
183 case AV_PIX_FMT_YUV422P9:
184 case AV_PIX_FMT_YUV444P9:
185 case AV_PIX_FMT_YUV420P10:
186 case AV_PIX_FMT_YUV422P10:
187 case AV_PIX_FMT_YUV444P10:
188 case AV_PIX_FMT_YUV420P12:
189 case AV_PIX_FMT_YUV422P12:
190 case AV_PIX_FMT_YUV444P12:
191 case AV_PIX_FMT_YUV420P14:
192 case AV_PIX_FMT_YUV422P14:
193 case AV_PIX_FMT_YUV444P14:
194 case AV_PIX_FMT_YUV420P16:
195 case AV_PIX_FMT_YUV422P16:
196 case AV_PIX_FMT_YUV444P16:
197 width *= 2;
198 break;
199 default:
200 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
201 av_get_pix_fmt_name(st->codec->pix_fmt));
202 return AVERROR(EINVAL);
203 }
204
205 for (i = 0; i < height; i++) {
206 avio_write(pb, ptr, width);
207 ptr += picture->linesize[0];
208 }
209
210 if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
211 st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
212 // Adjust for smaller Cb and Cr planes
213 av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
214 &v_chroma_shift);
215 width = FF_CEIL_RSHIFT(width, h_chroma_shift);
216 height = FF_CEIL_RSHIFT(height, v_chroma_shift);
217
218 ptr1 = picture->data[1];
219 ptr2 = picture->data[2];
220 for (i = 0; i < height; i++) { /* Cb */
221 avio_write(pb, ptr1, width);
222 ptr1 += picture->linesize[1];
223 }
224 for (i = 0; i < height; i++) { /* Cr */
225 avio_write(pb, ptr2, width);
226 ptr2 += picture->linesize[2];
227 }
228 }
229
230 return 0;
231 }
232
yuv4_write_header(AVFormatContext * s)233 static int yuv4_write_header(AVFormatContext *s)
234 {
235 int *first_pkt = s->priv_data;
236
237 if (s->nb_streams != 1)
238 return AVERROR(EIO);
239
240 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
241 av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
242 return AVERROR_INVALIDDATA;
243 }
244
245 switch (s->streams[0]->codec->pix_fmt) {
246 case AV_PIX_FMT_YUV411P:
247 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
248 "stream, some mjpegtools might not work.\n");
249 break;
250 case AV_PIX_FMT_GRAY8:
251 case AV_PIX_FMT_GRAY16:
252 case AV_PIX_FMT_YUV420P:
253 case AV_PIX_FMT_YUV422P:
254 case AV_PIX_FMT_YUV444P:
255 break;
256 case AV_PIX_FMT_YUV420P9:
257 case AV_PIX_FMT_YUV422P9:
258 case AV_PIX_FMT_YUV444P9:
259 case AV_PIX_FMT_YUV420P10:
260 case AV_PIX_FMT_YUV422P10:
261 case AV_PIX_FMT_YUV444P10:
262 case AV_PIX_FMT_YUV420P12:
263 case AV_PIX_FMT_YUV422P12:
264 case AV_PIX_FMT_YUV444P12:
265 case AV_PIX_FMT_YUV420P14:
266 case AV_PIX_FMT_YUV422P14:
267 case AV_PIX_FMT_YUV444P14:
268 case AV_PIX_FMT_YUV420P16:
269 case AV_PIX_FMT_YUV422P16:
270 case AV_PIX_FMT_YUV444P16:
271 if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
272 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
273 "Use '-strict -1' to encode to this pixel format.\n",
274 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
275 return AVERROR(EINVAL);
276 }
277 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
278 "Mjpegtools will not work.\n");
279 break;
280 default:
281 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
282 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
283 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
284 "yuv444p10, yuv422p10, yuv420p10, "
285 "yuv444p12, yuv422p12, yuv420p12, "
286 "yuv444p14, yuv422p14, yuv420p14, "
287 "yuv444p16, yuv422p16, yuv420p16 "
288 "and gray16 pixel formats. "
289 "Use -pix_fmt to select one.\n");
290 return AVERROR(EIO);
291 }
292
293 *first_pkt = 1;
294 return 0;
295 }
296
297 AVOutputFormat ff_yuv4mpegpipe_muxer = {
298 .name = "yuv4mpegpipe",
299 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
300 .extensions = "y4m",
301 .priv_data_size = sizeof(int),
302 .audio_codec = AV_CODEC_ID_NONE,
303 .video_codec = AV_CODEC_ID_RAWVIDEO,
304 .write_header = yuv4_write_header,
305 .write_packet = yuv4_write_packet,
306 .flags = AVFMT_RAWPICTURE,
307 };
308