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];
238 static int yuv4_write_header(AVFormatContext *s)
240 int *first_pkt = s->priv_data;
242 if (s->nb_streams != 1)
245 if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
246 av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
247 return AVERROR_INVALIDDATA;
250 switch (s->streams[0]->codec->pix_fmt) {
251 case AV_PIX_FMT_YUV411P:
252 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
253 "stream, some mjpegtools might not work.\n");
255 case AV_PIX_FMT_GRAY8:
256 case AV_PIX_FMT_GRAY16:
257 case AV_PIX_FMT_YUV420P:
258 case AV_PIX_FMT_YUV422P:
259 case AV_PIX_FMT_YUV444P:
261 case AV_PIX_FMT_YUV420P9:
262 case AV_PIX_FMT_YUV422P9:
263 case AV_PIX_FMT_YUV444P9:
264 case AV_PIX_FMT_YUV420P10:
265 case AV_PIX_FMT_YUV422P10:
266 case AV_PIX_FMT_YUV444P10:
267 case AV_PIX_FMT_YUV420P12:
268 case AV_PIX_FMT_YUV422P12:
269 case AV_PIX_FMT_YUV444P12:
270 case AV_PIX_FMT_YUV420P14:
271 case AV_PIX_FMT_YUV422P14:
272 case AV_PIX_FMT_YUV444P14:
273 case AV_PIX_FMT_YUV420P16:
274 case AV_PIX_FMT_YUV422P16:
275 case AV_PIX_FMT_YUV444P16:
276 if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
277 av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
278 "Use '-strict -1' to encode to this pixel format.\n",
279 av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
280 return AVERROR(EINVAL);
282 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
283 "Mjpegtools will not work.\n");
286 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
287 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
288 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
289 "yuv444p10, yuv422p10, yuv420p10, "
290 "yuv444p12, yuv422p12, yuv420p12, "
291 "yuv444p14, yuv422p14, yuv420p14, "
292 "yuv444p16, yuv422p16, yuv420p16 "
293 "and gray16 pixel formats. "
294 "Use -pix_fmt to select one.\n");
302 AVOutputFormat ff_yuv4mpegpipe_muxer = {
303 .name = "yuv4mpegpipe",
304 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
306 .priv_data_size = sizeof(int),
307 .audio_codec = AV_CODEC_ID_NONE,
308 .video_codec = AV_CODEC_ID_RAWVIDEO,
309 .write_header = yuv4_write_header,
310 .write_packet = yuv4_write_packet,
311 .flags = AVFMT_RAWPICTURE,
315 /* Header size increased to allow room for optional flags */
316 #define MAX_YUV4_HEADER 80
317 #define MAX_FRAME_HEADER 80
319 static int yuv4_read_header(AVFormatContext *s)
321 char header[MAX_YUV4_HEADER + 10]; // Include headroom for
322 // the longest option
323 char *tokstart, *tokend, *header_end, interlaced = '?';
325 AVIOContext *pb = s->pb;
326 int width = -1, height = -1, raten = 0,
327 rated = 0, aspectn = 0, aspectd = 0;
328 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE;
329 enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
332 for (i = 0; i < MAX_YUV4_HEADER; i++) {
333 header[i] = avio_r8(pb);
334 if (header[i] == '\n') {
335 header[i + 1] = 0x20; // Add a space after last option.
336 // Makes parsing "444" vs "444alpha" easier.
341 if (i == MAX_YUV4_HEADER)
343 if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
346 header_end = &header[i + 1]; // Include space
347 for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
348 tokstart < header_end; tokstart++) {
349 if (*tokstart == 0x20)
351 switch (*tokstart++) {
352 case 'W': // Width. Required.
353 width = strtol(tokstart, &tokend, 10);
356 case 'H': // Height. Required.
357 height = strtol(tokstart, &tokend, 10);
360 case 'C': // Color space
361 if (strncmp("420jpeg", tokstart, 7) == 0) {
362 pix_fmt = AV_PIX_FMT_YUV420P;
363 chroma_sample_location = AVCHROMA_LOC_CENTER;
364 } else if (strncmp("420mpeg2", tokstart, 8) == 0) {
365 pix_fmt = AV_PIX_FMT_YUV420P;
366 chroma_sample_location = AVCHROMA_LOC_LEFT;
367 } else if (strncmp("420paldv", tokstart, 8) == 0) {
368 pix_fmt = AV_PIX_FMT_YUV420P;
369 chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
370 } else if (strncmp("420p16", tokstart, 6) == 0) {
371 pix_fmt = AV_PIX_FMT_YUV420P16;
372 } else if (strncmp("422p16", tokstart, 6) == 0) {
373 pix_fmt = AV_PIX_FMT_YUV422P16;
374 } else if (strncmp("444p16", tokstart, 6) == 0) {
375 pix_fmt = AV_PIX_FMT_YUV444P16;
376 } else if (strncmp("420p14", tokstart, 6) == 0) {
377 pix_fmt = AV_PIX_FMT_YUV420P14;
378 } else if (strncmp("422p14", tokstart, 6) == 0) {
379 pix_fmt = AV_PIX_FMT_YUV422P14;
380 } else if (strncmp("444p14", tokstart, 6) == 0) {
381 pix_fmt = AV_PIX_FMT_YUV444P14;
382 } else if (strncmp("420p12", tokstart, 6) == 0) {
383 pix_fmt = AV_PIX_FMT_YUV420P12;
384 } else if (strncmp("422p12", tokstart, 6) == 0) {
385 pix_fmt = AV_PIX_FMT_YUV422P12;
386 } else if (strncmp("444p12", tokstart, 6) == 0) {
387 pix_fmt = AV_PIX_FMT_YUV444P12;
388 } else if (strncmp("420p10", tokstart, 6) == 0) {
389 pix_fmt = AV_PIX_FMT_YUV420P10;
390 } else if (strncmp("422p10", tokstart, 6) == 0) {
391 pix_fmt = AV_PIX_FMT_YUV422P10;
392 } else if (strncmp("444p10", tokstart, 6) == 0) {
393 pix_fmt = AV_PIX_FMT_YUV444P10;
394 } else if (strncmp("420p9", tokstart, 5) == 0) {
395 pix_fmt = AV_PIX_FMT_YUV420P9;
396 } else if (strncmp("422p9", tokstart, 5) == 0) {
397 pix_fmt = AV_PIX_FMT_YUV422P9;
398 } else if (strncmp("444p9", tokstart, 5) == 0) {
399 pix_fmt = AV_PIX_FMT_YUV444P9;
400 } else if (strncmp("420", tokstart, 3) == 0) {
401 pix_fmt = AV_PIX_FMT_YUV420P;
402 chroma_sample_location = AVCHROMA_LOC_CENTER;
403 } else if (strncmp("411", tokstart, 3) == 0) {
404 pix_fmt = AV_PIX_FMT_YUV411P;
405 } else if (strncmp("422", tokstart, 3) == 0) {
406 pix_fmt = AV_PIX_FMT_YUV422P;
407 } else if (strncmp("444alpha", tokstart, 8) == 0 ) {
408 av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 "
409 "YUV4MPEG stream.\n");
411 } else if (strncmp("444", tokstart, 3) == 0) {
412 pix_fmt = AV_PIX_FMT_YUV444P;
413 } else if (strncmp("mono16", tokstart, 6) == 0) {
414 pix_fmt = AV_PIX_FMT_GRAY16;
415 } else if (strncmp("mono", tokstart, 4) == 0) {
416 pix_fmt = AV_PIX_FMT_GRAY8;
418 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
422 while (tokstart < header_end && *tokstart != 0x20)
425 case 'I': // Interlace type
426 interlaced = *tokstart++;
428 case 'F': // Frame rate
429 sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
430 while (tokstart < header_end && *tokstart != 0x20)
433 case 'A': // Pixel aspect
434 sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
435 while (tokstart < header_end && *tokstart != 0x20)
438 case 'X': // Vendor extensions
439 if (strncmp("YSCSS=", tokstart, 6) == 0) {
440 // Older nonstandard pixel format representation
442 if (strncmp("420JPEG", tokstart, 7) == 0)
443 alt_pix_fmt = AV_PIX_FMT_YUV420P;
444 else if (strncmp("420MPEG2", tokstart, 8) == 0)
445 alt_pix_fmt = AV_PIX_FMT_YUV420P;
446 else if (strncmp("420PALDV", tokstart, 8) == 0)
447 alt_pix_fmt = AV_PIX_FMT_YUV420P;
448 else if (strncmp("420P9", tokstart, 5) == 0)
449 alt_pix_fmt = AV_PIX_FMT_YUV420P9;
450 else if (strncmp("422P9", tokstart, 5) == 0)
451 alt_pix_fmt = AV_PIX_FMT_YUV422P9;
452 else if (strncmp("444P9", tokstart, 5) == 0)
453 alt_pix_fmt = AV_PIX_FMT_YUV444P9;
454 else if (strncmp("420P10", tokstart, 6) == 0)
455 alt_pix_fmt = AV_PIX_FMT_YUV420P10;
456 else if (strncmp("422P10", tokstart, 6) == 0)
457 alt_pix_fmt = AV_PIX_FMT_YUV422P10;
458 else if (strncmp("444P10", tokstart, 6) == 0)
459 alt_pix_fmt = AV_PIX_FMT_YUV444P10;
460 else if (strncmp("420P12", tokstart, 6) == 0)
461 alt_pix_fmt = AV_PIX_FMT_YUV420P12;
462 else if (strncmp("422P12", tokstart, 6) == 0)
463 alt_pix_fmt = AV_PIX_FMT_YUV422P12;
464 else if (strncmp("444P12", tokstart, 6) == 0)
465 alt_pix_fmt = AV_PIX_FMT_YUV444P12;
466 else if (strncmp("420P14", tokstart, 6) == 0)
467 alt_pix_fmt = AV_PIX_FMT_YUV420P14;
468 else if (strncmp("422P14", tokstart, 6) == 0)
469 alt_pix_fmt = AV_PIX_FMT_YUV422P14;
470 else if (strncmp("444P14", tokstart, 6) == 0)
471 alt_pix_fmt = AV_PIX_FMT_YUV444P14;
472 else if (strncmp("420P16", tokstart, 6) == 0)
473 alt_pix_fmt = AV_PIX_FMT_YUV420P16;
474 else if (strncmp("422P16", tokstart, 6) == 0)
475 alt_pix_fmt = AV_PIX_FMT_YUV422P16;
476 else if (strncmp("444P16", tokstart, 6) == 0)
477 alt_pix_fmt = AV_PIX_FMT_YUV444P16;
478 else if (strncmp("411", tokstart, 3) == 0)
479 alt_pix_fmt = AV_PIX_FMT_YUV411P;
480 else if (strncmp("422", tokstart, 3) == 0)
481 alt_pix_fmt = AV_PIX_FMT_YUV422P;
482 else if (strncmp("444", tokstart, 3) == 0)
483 alt_pix_fmt = AV_PIX_FMT_YUV444P;
485 while (tokstart < header_end && *tokstart != 0x20)
491 if (width == -1 || height == -1) {
492 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
496 if (pix_fmt == AV_PIX_FMT_NONE) {
497 if (alt_pix_fmt == AV_PIX_FMT_NONE)
498 pix_fmt = AV_PIX_FMT_YUV420P;
500 pix_fmt = alt_pix_fmt;
503 if (raten <= 0 || rated <= 0) {
504 // Frame rate unknown
509 if (aspectn == 0 && aspectd == 0) {
510 // Pixel aspect unknown
514 st = avformat_new_stream(s, NULL);
516 return AVERROR(ENOMEM);
517 st->codec->width = width;
518 st->codec->height = height;
519 av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
520 avpriv_set_pts_info(st, 64, rated, raten);
521 st->codec->pix_fmt = pix_fmt;
522 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
523 st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
524 st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
525 st->codec->chroma_sample_location = chroma_sample_location;
529 st->codec->field_order = AV_FIELD_PROGRESSIVE;
532 st->codec->field_order = AV_FIELD_TB;
535 st->codec->field_order = AV_FIELD_BT;
538 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
539 "interlaced and non-interlaced frames.\n");
541 st->codec->field_order = AV_FIELD_UNKNOWN;
544 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
545 return AVERROR(EINVAL);
551 static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
554 char header[MAX_FRAME_HEADER+1];
555 int packet_size, width, height, ret;
556 AVStream *st = s->streams[0];
558 for (i = 0; i < MAX_FRAME_HEADER; i++) {
559 header[i] = avio_r8(s->pb);
560 if (header[i] == '\n') {
567 else if (s->pb->eof_reached)
569 else if (i == MAX_FRAME_HEADER)
570 return AVERROR_INVALIDDATA;
572 if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
573 return AVERROR_INVALIDDATA;
575 width = st->codec->width;
576 height = st->codec->height;
578 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
582 ret = av_get_packet(s->pb, pkt, packet_size);
585 else if (ret != packet_size)
586 return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
588 pkt->stream_index = 0;
592 static int yuv4_probe(AVProbeData *pd)
594 /* check file header */
595 if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
596 return AVPROBE_SCORE_MAX;
601 #if CONFIG_YUV4MPEGPIPE_DEMUXER
602 AVInputFormat ff_yuv4mpegpipe_demuxer = {
603 .name = "yuv4mpegpipe",
604 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
605 .read_probe = yuv4_probe,
606 .read_header = yuv4_read_header,
607 .read_packet = yuv4_read_packet,