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yuv4mpegenc.c
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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 
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 
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 
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->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 };
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