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"
25 #include "libavutil/pixdesc.h"
27 #define Y4M_MAGIC "YUV4MPEG2"
28 #define Y4M_FRAME_MAGIC "FRAME"
29 #define Y4M_LINE_MAX 256
31 #if CONFIG_YUV4MPEGPIPE_MUXER
32 static int yuv4_generate_header(AVFormatContext *s, char* buf)
36 int raten, rated, aspectn, aspectd, n;
38 const char *colorspace = "";
41 width = st->codec->width;
42 height = st->codec->height;
44 av_reduce(&raten, &rated, st->codec->time_base.den,
45 st->codec->time_base.num, (1UL << 31) - 1);
47 aspectn = st->sample_aspect_ratio.num;
48 aspectd = st->sample_aspect_ratio.den;
50 if (aspectn == 0 && aspectd == 1)
51 aspectd = 0; // 0:0 means unknown
53 inter = 'p'; /* progressive is the default */
54 if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
55 inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
56 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
58 } else if (st->codec->field_order == AV_FIELD_TB || st->codec->field_order == AV_FIELD_TT) {
60 } else if (st->codec->field_order == AV_FIELD_BT || st->codec->field_order == AV_FIELD_BB) {
64 switch (st->codec->pix_fmt) {
65 case AV_PIX_FMT_GRAY8:
66 colorspace = " Cmono";
68 case AV_PIX_FMT_GRAY16:
69 colorspace = " Cmono16";
71 case AV_PIX_FMT_YUV411P:
72 colorspace = " C411 XYSCSS=411";
74 case AV_PIX_FMT_YUV420P:
75 switch (st->codec->chroma_sample_location) {
76 case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
77 case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
78 default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
81 case AV_PIX_FMT_YUV422P:
82 colorspace = " C422 XYSCSS=422";
84 case AV_PIX_FMT_YUV444P:
85 colorspace = " C444 XYSCSS=444";
87 case AV_PIX_FMT_YUV420P9:
88 colorspace = " C420p9 XYSCSS=420P9";
90 case AV_PIX_FMT_YUV422P9:
91 colorspace = " C422p9 XYSCSS=422P9";
93 case AV_PIX_FMT_YUV444P9:
94 colorspace = " C444p9 XYSCSS=444P9";
96 case AV_PIX_FMT_YUV420P10:
97 colorspace = " C420p10 XYSCSS=420P10";
99 case AV_PIX_FMT_YUV422P10:
100 colorspace = " C422p10 XYSCSS=422P10";
102 case AV_PIX_FMT_YUV444P10:
103 colorspace = " C444p10 XYSCSS=444P10";
105 case AV_PIX_FMT_YUV420P12:
106 colorspace = " C420p12 XYSCSS=420P12";
108 case AV_PIX_FMT_YUV422P12:
109 colorspace = " C422p12 XYSCSS=422P12";
111 case AV_PIX_FMT_YUV444P12:
112 colorspace = " C444p12 XYSCSS=444P12";
114 case AV_PIX_FMT_YUV420P14:
115 colorspace = " C420p14 XYSCSS=420P14";
117 case AV_PIX_FMT_YUV422P14:
118 colorspace = " C422p14 XYSCSS=422P14";
120 case AV_PIX_FMT_YUV444P14:
121 colorspace = " C444p14 XYSCSS=444P14";
123 case AV_PIX_FMT_YUV420P16:
124 colorspace = " C420p16 XYSCSS=420P16";
126 case AV_PIX_FMT_YUV422P16:
127 colorspace = " C422p16 XYSCSS=422P16";
129 case AV_PIX_FMT_YUV444P16:
130 colorspace = " C444p16 XYSCSS=444P16";
134 /* construct stream header, if this is the first frame */
135 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
136 Y4M_MAGIC, width, height, raten, rated, inter,
137 aspectn, aspectd, colorspace);
142 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
144 AVStream *st = s->streams[pkt->stream_index];
145 AVIOContext *pb = s->pb;
146 AVPicture *picture, picture_tmp;
147 int* first_pkt = s->priv_data;
148 int width, height, h_chroma_shift, v_chroma_shift;
150 char buf2[Y4M_LINE_MAX + 1];
152 uint8_t *ptr, *ptr1, *ptr2;
154 memcpy(&picture_tmp, pkt->data, sizeof(AVPicture));
155 picture = &picture_tmp;
157 /* for the first packet we have to output the header as well */
160 if (yuv4_generate_header(s, buf2) < 0) {
161 av_log(s, AV_LOG_ERROR,
162 "Error. YUV4MPEG stream header write failed.\n");
165 avio_write(pb, buf2, strlen(buf2));
169 /* construct frame header */
171 snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
172 avio_write(pb, buf1, strlen(buf1));
174 width = st->codec->width;
175 height = st->codec->height;
177 ptr = picture->data[0];
179 switch (st->codec->pix_fmt) {
180 case AV_PIX_FMT_GRAY8:
181 case AV_PIX_FMT_YUV411P:
182 case AV_PIX_FMT_YUV420P:
183 case AV_PIX_FMT_YUV422P:
184 case AV_PIX_FMT_YUV444P:
186 case AV_PIX_FMT_GRAY16:
187 case AV_PIX_FMT_YUV420P9:
188 case AV_PIX_FMT_YUV422P9:
189 case AV_PIX_FMT_YUV444P9:
190 case AV_PIX_FMT_YUV420P10:
191 case AV_PIX_FMT_YUV422P10:
192 case AV_PIX_FMT_YUV444P10:
193 case AV_PIX_FMT_YUV420P12:
194 case AV_PIX_FMT_YUV422P12:
195 case AV_PIX_FMT_YUV444P12:
196 case AV_PIX_FMT_YUV420P14:
197 case AV_PIX_FMT_YUV422P14:
198 case AV_PIX_FMT_YUV444P14:
199 case AV_PIX_FMT_YUV420P16:
200 case AV_PIX_FMT_YUV422P16:
201 case AV_PIX_FMT_YUV444P16:
205 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
206 av_get_pix_fmt_name(st->codec->pix_fmt));
207 return AVERROR(EINVAL);
210 for (i = 0; i < height; i++) {
211 avio_write(pb, ptr, width);
212 ptr += picture->linesize[0];
215 if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
216 st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
217 // Adjust for smaller Cb and Cr planes
218 av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
220 width >>= h_chroma_shift;
221 height >>= v_chroma_shift;
223 ptr1 = picture->data[1];
224 ptr2 = picture->data[2];
225 for (i = 0; i < height; i++) { /* Cb */
226 avio_write(pb, ptr1, width);
227 ptr1 += picture->linesize[1];
229 for (i = 0; i < height; i++) { /* Cr */
230 avio_write(pb, ptr2, width);
231 ptr2 += picture->linesize[2];
239 static int yuv4_write_header(AVFormatContext *s)
241 int *first_pkt = s->priv_data;
243 if (s->nb_streams != 1)
246 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
247 av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
248 return AVERROR_INVALIDDATA;
251 switch (s->streams[0]->codec->pix_fmt) {
252 case AV_PIX_FMT_YUV411P:
253 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
254 "stream, some mjpegtools might not work.\n");
256 case AV_PIX_FMT_GRAY8:
257 case AV_PIX_FMT_GRAY16:
258 case AV_PIX_FMT_YUV420P:
259 case AV_PIX_FMT_YUV422P:
260 case AV_PIX_FMT_YUV444P:
262 case AV_PIX_FMT_YUV420P9:
263 case AV_PIX_FMT_YUV422P9:
264 case AV_PIX_FMT_YUV444P9:
265 case AV_PIX_FMT_YUV420P10:
266 case AV_PIX_FMT_YUV422P10:
267 case AV_PIX_FMT_YUV444P10:
268 case AV_PIX_FMT_YUV420P12:
269 case AV_PIX_FMT_YUV422P12:
270 case AV_PIX_FMT_YUV444P12:
271 case AV_PIX_FMT_YUV420P14:
272 case AV_PIX_FMT_YUV422P14:
273 case AV_PIX_FMT_YUV444P14:
274 case AV_PIX_FMT_YUV420P16:
275 case AV_PIX_FMT_YUV422P16:
276 case AV_PIX_FMT_YUV444P16:
277 if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
278 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
279 "Use '-strict -1' to encode to this pixel format.\n",
280 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
281 return AVERROR(EINVAL);
283 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
284 "Mjpegtools will not work.\n");
287 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
288 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
289 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
290 "yuv444p10, yuv422p10, yuv420p10, "
291 "yuv444p12, yuv422p12, yuv420p12, "
292 "yuv444p14, yuv422p14, yuv420p14, "
293 "yuv444p16, yuv422p16, yuv420p16 "
294 "and gray16 pixel formats. "
295 "Use -pix_fmt to select one.\n");
303 AVOutputFormat ff_yuv4mpegpipe_muxer = {
304 .name = "yuv4mpegpipe",
305 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
307 .priv_data_size = sizeof(int),
308 .audio_codec = AV_CODEC_ID_NONE,
309 .video_codec = AV_CODEC_ID_RAWVIDEO,
310 .write_header = yuv4_write_header,
311 .write_packet = yuv4_write_packet,
312 .flags = AVFMT_RAWPICTURE,
316 /* Header size increased to allow room for optional flags */
317 #define MAX_YUV4_HEADER 80
318 #define MAX_FRAME_HEADER 80
320 static int yuv4_read_header(AVFormatContext *s)
322 char header[MAX_YUV4_HEADER + 10]; // Include headroom for
323 // the longest option
324 char *tokstart, *tokend, *header_end, interlaced = '?';
326 AVIOContext *pb = s->pb;
327 int width = -1, height = -1, raten = 0,
328 rated = 0, aspectn = 0, aspectd = 0;
329 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE;
330 enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
333 for (i = 0; i < MAX_YUV4_HEADER; i++) {
334 header[i] = avio_r8(pb);
335 if (header[i] == '\n') {
336 header[i + 1] = 0x20; // Add a space after last option.
337 // Makes parsing "444" vs "444alpha" easier.
342 if (i == MAX_YUV4_HEADER)
344 if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
347 header_end = &header[i + 1]; // Include space
348 for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
349 tokstart < header_end; tokstart++) {
350 if (*tokstart == 0x20)
352 switch (*tokstart++) {
353 case 'W': // Width. Required.
354 width = strtol(tokstart, &tokend, 10);
357 case 'H': // Height. Required.
358 height = strtol(tokstart, &tokend, 10);
361 case 'C': // Color space
362 if (strncmp("420jpeg", tokstart, 7) == 0) {
363 pix_fmt = AV_PIX_FMT_YUV420P;
364 chroma_sample_location = AVCHROMA_LOC_CENTER;
365 } else if (strncmp("420mpeg2", tokstart, 8) == 0) {
366 pix_fmt = AV_PIX_FMT_YUV420P;
367 chroma_sample_location = AVCHROMA_LOC_LEFT;
368 } else if (strncmp("420paldv", tokstart, 8) == 0) {
369 pix_fmt = AV_PIX_FMT_YUV420P;
370 chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
371 } else if (strncmp("420p16", tokstart, 6) == 0) {
372 pix_fmt = AV_PIX_FMT_YUV420P16;
373 } else if (strncmp("422p16", tokstart, 6) == 0) {
374 pix_fmt = AV_PIX_FMT_YUV422P16;
375 } else if (strncmp("444p16", tokstart, 6) == 0) {
376 pix_fmt = AV_PIX_FMT_YUV444P16;
377 } else if (strncmp("420p14", tokstart, 6) == 0) {
378 pix_fmt = AV_PIX_FMT_YUV420P14;
379 } else if (strncmp("422p14", tokstart, 6) == 0) {
380 pix_fmt = AV_PIX_FMT_YUV422P14;
381 } else if (strncmp("444p14", tokstart, 6) == 0) {
382 pix_fmt = AV_PIX_FMT_YUV444P14;
383 } else if (strncmp("420p12", tokstart, 6) == 0) {
384 pix_fmt = AV_PIX_FMT_YUV420P12;
385 } else if (strncmp("422p12", tokstart, 6) == 0) {
386 pix_fmt = AV_PIX_FMT_YUV422P12;
387 } else if (strncmp("444p12", tokstart, 6) == 0) {
388 pix_fmt = AV_PIX_FMT_YUV444P12;
389 } else if (strncmp("420p10", tokstart, 6) == 0) {
390 pix_fmt = AV_PIX_FMT_YUV420P10;
391 } else if (strncmp("422p10", tokstart, 6) == 0) {
392 pix_fmt = AV_PIX_FMT_YUV422P10;
393 } else if (strncmp("444p10", tokstart, 6) == 0) {
394 pix_fmt = AV_PIX_FMT_YUV444P10;
395 } else if (strncmp("420p9", tokstart, 5) == 0) {
396 pix_fmt = AV_PIX_FMT_YUV420P9;
397 } else if (strncmp("422p9", tokstart, 5) == 0) {
398 pix_fmt = AV_PIX_FMT_YUV422P9;
399 } else if (strncmp("444p9", tokstart, 5) == 0) {
400 pix_fmt = AV_PIX_FMT_YUV444P9;
401 } else if (strncmp("420", tokstart, 3) == 0) {
402 pix_fmt = AV_PIX_FMT_YUV420P;
403 chroma_sample_location = AVCHROMA_LOC_CENTER;
404 } else if (strncmp("411", tokstart, 3) == 0) {
405 pix_fmt = AV_PIX_FMT_YUV411P;
406 } else if (strncmp("422", tokstart, 3) == 0) {
407 pix_fmt = AV_PIX_FMT_YUV422P;
408 } else if (strncmp("444alpha", tokstart, 8) == 0 ) {
409 av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 "
410 "YUV4MPEG stream.\n");
412 } else if (strncmp("444", tokstart, 3) == 0) {
413 pix_fmt = AV_PIX_FMT_YUV444P;
414 } else if (strncmp("mono16", tokstart, 6) == 0) {
415 pix_fmt = AV_PIX_FMT_GRAY16;
416 } else if (strncmp("mono", tokstart, 4) == 0) {
417 pix_fmt = AV_PIX_FMT_GRAY8;
419 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
423 while (tokstart < header_end && *tokstart != 0x20)
426 case 'I': // Interlace type
427 interlaced = *tokstart++;
429 case 'F': // Frame rate
430 sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
431 while (tokstart < header_end && *tokstart != 0x20)
434 case 'A': // Pixel aspect
435 sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
436 while (tokstart < header_end && *tokstart != 0x20)
439 case 'X': // Vendor extensions
440 if (strncmp("YSCSS=", tokstart, 6) == 0) {
441 // Older nonstandard pixel format representation
443 if (strncmp("420JPEG", tokstart, 7) == 0)
444 alt_pix_fmt = AV_PIX_FMT_YUV420P;
445 else if (strncmp("420MPEG2", tokstart, 8) == 0)
446 alt_pix_fmt = AV_PIX_FMT_YUV420P;
447 else if (strncmp("420PALDV", tokstart, 8) == 0)
448 alt_pix_fmt = AV_PIX_FMT_YUV420P;
449 else if (strncmp("420P9", tokstart, 5) == 0)
450 alt_pix_fmt = AV_PIX_FMT_YUV420P9;
451 else if (strncmp("422P9", tokstart, 5) == 0)
452 alt_pix_fmt = AV_PIX_FMT_YUV422P9;
453 else if (strncmp("444P9", tokstart, 5) == 0)
454 alt_pix_fmt = AV_PIX_FMT_YUV444P9;
455 else if (strncmp("420P10", tokstart, 6) == 0)
456 alt_pix_fmt = AV_PIX_FMT_YUV420P10;
457 else if (strncmp("422P10", tokstart, 6) == 0)
458 alt_pix_fmt = AV_PIX_FMT_YUV422P10;
459 else if (strncmp("444P10", tokstart, 6) == 0)
460 alt_pix_fmt = AV_PIX_FMT_YUV444P10;
461 else if (strncmp("420P12", tokstart, 6) == 0)
462 alt_pix_fmt = AV_PIX_FMT_YUV420P12;
463 else if (strncmp("422P12", tokstart, 6) == 0)
464 alt_pix_fmt = AV_PIX_FMT_YUV422P12;
465 else if (strncmp("444P12", tokstart, 6) == 0)
466 alt_pix_fmt = AV_PIX_FMT_YUV444P12;
467 else if (strncmp("420P14", tokstart, 6) == 0)
468 alt_pix_fmt = AV_PIX_FMT_YUV420P14;
469 else if (strncmp("422P14", tokstart, 6) == 0)
470 alt_pix_fmt = AV_PIX_FMT_YUV422P14;
471 else if (strncmp("444P14", tokstart, 6) == 0)
472 alt_pix_fmt = AV_PIX_FMT_YUV444P14;
473 else if (strncmp("420P16", tokstart, 6) == 0)
474 alt_pix_fmt = AV_PIX_FMT_YUV420P16;
475 else if (strncmp("422P16", tokstart, 6) == 0)
476 alt_pix_fmt = AV_PIX_FMT_YUV422P16;
477 else if (strncmp("444P16", tokstart, 6) == 0)
478 alt_pix_fmt = AV_PIX_FMT_YUV444P16;
479 else if (strncmp("411", tokstart, 3) == 0)
480 alt_pix_fmt = AV_PIX_FMT_YUV411P;
481 else if (strncmp("422", tokstart, 3) == 0)
482 alt_pix_fmt = AV_PIX_FMT_YUV422P;
483 else if (strncmp("444", tokstart, 3) == 0)
484 alt_pix_fmt = AV_PIX_FMT_YUV444P;
486 while (tokstart < header_end && *tokstart != 0x20)
492 if (width == -1 || height == -1) {
493 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
497 if (pix_fmt == AV_PIX_FMT_NONE) {
498 if (alt_pix_fmt == AV_PIX_FMT_NONE)
499 pix_fmt = AV_PIX_FMT_YUV420P;
501 pix_fmt = alt_pix_fmt;
504 if (raten <= 0 || rated <= 0) {
505 // Frame rate unknown
510 if (aspectn == 0 && aspectd == 0) {
511 // Pixel aspect unknown
515 st = avformat_new_stream(s, NULL);
517 return AVERROR(ENOMEM);
518 st->codec->width = width;
519 st->codec->height = height;
520 av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
521 avpriv_set_pts_info(st, 64, rated, raten);
522 st->codec->pix_fmt = pix_fmt;
523 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
524 st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
525 st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
526 st->codec->chroma_sample_location = chroma_sample_location;
530 st->codec->field_order = AV_FIELD_PROGRESSIVE;
533 st->codec->field_order = AV_FIELD_TB;
536 st->codec->field_order = AV_FIELD_BT;
539 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
540 "interlaced and non-interlaced frames.\n");
542 st->codec->field_order = AV_FIELD_UNKNOWN;
545 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
546 return AVERROR(EINVAL);
552 static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
555 char header[MAX_FRAME_HEADER+1];
556 int packet_size, width, height, ret;
557 AVStream *st = s->streams[0];
559 for (i = 0; i < MAX_FRAME_HEADER; i++) {
560 header[i] = avio_r8(s->pb);
561 if (header[i] == '\n') {
568 else if (s->pb->eof_reached)
570 else if (i == MAX_FRAME_HEADER)
571 return AVERROR_INVALIDDATA;
573 if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
574 return AVERROR_INVALIDDATA;
576 width = st->codec->width;
577 height = st->codec->height;
579 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
583 ret = av_get_packet(s->pb, pkt, packet_size);
586 else if (ret != packet_size)
587 return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
589 pkt->stream_index = 0;
593 static int yuv4_probe(AVProbeData *pd)
595 /* check file header */
596 if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
597 return AVPROBE_SCORE_MAX;
602 #if CONFIG_YUV4MPEGPIPE_DEMUXER
603 AVInputFormat ff_yuv4mpegpipe_demuxer = {
604 .name = "yuv4mpegpipe",
605 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
606 .read_probe = yuv4_probe,
607 .read_header = yuv4_read_header,
608 .read_packet = yuv4_read_packet,