changing AVCodecContext codec -> *codec in AVStream so additions to AVCodecContext...
[libav.git] / libavformat / yuv4mpeg.c
1 /*
2 * YUV4MPEG format
3 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include "avformat.h"
20
21 #define Y4M_MAGIC "YUV4MPEG2"
22 #define Y4M_FRAME_MAGIC "FRAME"
23 #define Y4M_LINE_MAX 256
24
25 #ifdef CONFIG_ENCODERS
26
27 static int yuv4_generate_header(AVFormatContext *s, char* buf)
28 {
29 AVStream *st;
30 int width, height;
31 int raten, rated, aspectn, aspectd, n;
32 char inter;
33 char *colorspace = "";
34
35 st = s->streams[0];
36 width = st->codec->width;
37 height = st->codec->height;
38
39 av_reduce(&raten, &rated, st->codec->time_base.den, st->codec->time_base.num, (1UL<<31)-1);
40
41 aspectn = st->codec->sample_aspect_ratio.num;
42 aspectd = st->codec->sample_aspect_ratio.den;
43
44 if ( aspectn == 0 && aspectd == 1 ) aspectd = 0; // 0:0 means unknown
45
46 inter = 'p'; /* progressive is the default */
47 if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame) {
48 inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
49 }
50
51 switch(st->codec->pix_fmt) {
52 case PIX_FMT_GRAY8:
53 colorspace = " Cmono";
54 break;
55 case PIX_FMT_YUV411P:
56 colorspace = " C411 XYSCSS=411";
57 break;
58 case PIX_FMT_YUV420P:
59 colorspace = (st->codec->codec_id == CODEC_ID_DVVIDEO)?" C420paldv XYSCSS=420PALDV":" C420mpeg2 XYSCSS=420MPEG2";
60 break;
61 case PIX_FMT_YUV422P:
62 colorspace = " C422 XYSCSS=422";
63 break;
64 case PIX_FMT_YUV444P:
65 colorspace = " C444 XYSCSS=444";
66 break;
67 }
68
69 /* construct stream header, if this is the first frame */
70 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
71 Y4M_MAGIC,
72 width,
73 height,
74 raten, rated,
75 inter,
76 aspectn, aspectd,
77 colorspace);
78
79 return n;
80 }
81
82 static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
83 {
84 AVStream *st = s->streams[pkt->stream_index];
85 ByteIOContext *pb = &s->pb;
86 AVPicture *picture;
87 int* first_pkt = s->priv_data;
88 int width, height, h_chroma_shift, v_chroma_shift;
89 int i, m;
90 char buf2[Y4M_LINE_MAX+1];
91 char buf1[20];
92 uint8_t *ptr, *ptr1, *ptr2;
93
94 picture = (AVPicture *)pkt->data;
95
96 /* for the first packet we have to output the header as well */
97 if (*first_pkt) {
98 *first_pkt = 0;
99 if (yuv4_generate_header(s, buf2) < 0) {
100 av_log(s, AV_LOG_ERROR, "Error. YUV4MPEG stream header write failed.\n");
101 return AVERROR_IO;
102 } else {
103 put_buffer(pb, buf2, strlen(buf2));
104 }
105 }
106
107 /* construct frame header */
108
109 m = snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
110 put_buffer(pb, buf1, strlen(buf1));
111
112 width = st->codec->width;
113 height = st->codec->height;
114
115 ptr = picture->data[0];
116 for(i=0;i<height;i++) {
117 put_buffer(pb, ptr, width);
118 ptr += picture->linesize[0];
119 }
120
121 if (st->codec->pix_fmt != PIX_FMT_GRAY8){
122 // Adjust for smaller Cb and Cr planes
123 avcodec_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift, &v_chroma_shift);
124 width >>= h_chroma_shift;
125 height >>= v_chroma_shift;
126
127 ptr1 = picture->data[1];
128 ptr2 = picture->data[2];
129 for(i=0;i<height;i++) { /* Cb */
130 put_buffer(pb, ptr1, width);
131 ptr1 += picture->linesize[1];
132 }
133 for(i=0;i<height;i++) { /* Cr */
134 put_buffer(pb, ptr2, width);
135 ptr2 += picture->linesize[2];
136 }
137 }
138 put_flush_packet(pb);
139 return 0;
140 }
141
142 static int yuv4_write_header(AVFormatContext *s)
143 {
144 int* first_pkt = s->priv_data;
145
146 if (s->nb_streams != 1)
147 return AVERROR_IO;
148
149 if (s->streams[0]->codec->pix_fmt == PIX_FMT_YUV411P) {
150 av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV stream, some mjpegtools might not work.\n");
151 }
152 else if ((s->streams[0]->codec->pix_fmt != PIX_FMT_YUV420P) &&
153 (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV422P) &&
154 (s->streams[0]->codec->pix_fmt != PIX_FMT_GRAY8) &&
155 (s->streams[0]->codec->pix_fmt != PIX_FMT_YUV444P)) {
156 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, yuv422p, yuv420p, yuv411p and gray pixel formats. Use -pix_fmt to select one.\n");
157 return AVERROR_IO;
158 }
159
160 *first_pkt = 1;
161 return 0;
162 }
163
164 static int yuv4_write_trailer(AVFormatContext *s)
165 {
166 return 0;
167 }
168
169 AVOutputFormat yuv4mpegpipe_oformat = {
170 "yuv4mpegpipe",
171 "YUV4MPEG pipe format",
172 "",
173 "y4m",
174 sizeof(int),
175 CODEC_ID_NONE,
176 CODEC_ID_RAWVIDEO,
177 yuv4_write_header,
178 yuv4_write_packet,
179 yuv4_write_trailer,
180 .flags = AVFMT_RAWPICTURE,
181 };
182 #endif //CONFIG_ENCODERS
183
184 /* Header size increased to allow room for optional flags */
185 #define MAX_YUV4_HEADER 80
186 #define MAX_FRAME_HEADER 80
187
188 static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
189 {
190 char header[MAX_YUV4_HEADER+10]; // Include headroom for the longest option
191 char *tokstart,*tokend,*header_end;
192 int i;
193 ByteIOContext *pb = &s->pb;
194 int width=-1, height=-1, raten=0, rated=0, aspectn=0, aspectd=0,interlaced_frame=0,top_field_first=0;
195 enum PixelFormat pix_fmt=PIX_FMT_NONE,alt_pix_fmt=PIX_FMT_NONE;
196 AVStream *st;
197
198 for (i=0; i<MAX_YUV4_HEADER; i++) {
199 header[i] = get_byte(pb);
200 if (header[i] == '\n') {
201 header[i+1] = 0x20; // Add a space after last option. Makes parsing "444" vs "444alpha" easier.
202 header[i+2] = 0;
203 break;
204 }
205 }
206 if (i == MAX_YUV4_HEADER) return -1;
207 if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) return -1;
208
209 header_end = &header[i+1]; // Include space
210 for(tokstart = &header[strlen(Y4M_MAGIC) + 1]; tokstart < header_end; tokstart++) {
211 if (*tokstart==0x20) continue;
212 switch (*tokstart++) {
213 case 'W': // Width. Required.
214 width = strtol(tokstart, &tokend, 10);
215 tokstart=tokend;
216 break;
217 case 'H': // Height. Required.
218 height = strtol(tokstart, &tokend, 10);
219 tokstart=tokend;
220 break;
221 case 'C': // Color space
222 if (strncmp("420jpeg",tokstart,7)==0)
223 pix_fmt = PIX_FMT_YUV420P;
224 else if (strncmp("420mpeg2",tokstart,8)==0)
225 pix_fmt = PIX_FMT_YUV420P;
226 else if (strncmp("420paldv", tokstart, 8)==0)
227 pix_fmt = PIX_FMT_YUV420P;
228 else if (strncmp("411", tokstart, 3)==0)
229 pix_fmt = PIX_FMT_YUV411P;
230 else if (strncmp("422", tokstart, 3)==0)
231 pix_fmt = PIX_FMT_YUV422P;
232 else if (strncmp("444alpha", tokstart, 8)==0) {
233 av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 YUV4MPEG stream.\n");
234 return -1;
235 } else if (strncmp("444", tokstart, 3)==0)
236 pix_fmt = PIX_FMT_YUV444P;
237 else if (strncmp("mono",tokstart, 4)==0) {
238 pix_fmt = PIX_FMT_GRAY8;
239 } else {
240 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown pixel format.\n");
241 return -1;
242 }
243 while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
244 break;
245 case 'I': // Interlace type
246 switch (*tokstart++){
247 case '?':
248 break;
249 case 'p':
250 interlaced_frame=0;
251 break;
252 case 't':
253 interlaced_frame=1;
254 top_field_first=1;
255 break;
256 case 'b':
257 interlaced_frame=1;
258 top_field_first=0;
259 break;
260 case 'm':
261 av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed interlaced and non-interlaced frames.\n");
262 return -1;
263 default:
264 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
265 return -1;
266 }
267 break;
268 case 'F': // Frame rate
269 sscanf(tokstart,"%d:%d",&raten,&rated); // 0:0 if unknown
270 while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
271 break;
272 case 'A': // Pixel aspect
273 sscanf(tokstart,"%d:%d",&aspectn,&aspectd); // 0:0 if unknown
274 while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
275 break;
276 case 'X': // Vendor extensions
277 if (strncmp("YSCSS=",tokstart,6)==0) {
278 // Older nonstandard pixel format representation
279 tokstart+=6;
280 if (strncmp("420JPEG",tokstart,7)==0)
281 alt_pix_fmt=PIX_FMT_YUV420P;
282 else if (strncmp("420MPEG2",tokstart,8)==0)
283 alt_pix_fmt=PIX_FMT_YUV420P;
284 else if (strncmp("420PALDV",tokstart,8)==0)
285 alt_pix_fmt=PIX_FMT_YUV420P;
286 else if (strncmp("411",tokstart,3)==0)
287 alt_pix_fmt=PIX_FMT_YUV411P;
288 else if (strncmp("422",tokstart,3)==0)
289 alt_pix_fmt=PIX_FMT_YUV422P;
290 else if (strncmp("444",tokstart,3)==0)
291 alt_pix_fmt=PIX_FMT_YUV444P;
292 }
293 while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
294 break;
295 }
296 }
297
298 if ((width == -1) || (height == -1)) {
299 av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
300 return -1;
301 }
302
303 if (pix_fmt == PIX_FMT_NONE) {
304 if (alt_pix_fmt == PIX_FMT_NONE)
305 pix_fmt = PIX_FMT_YUV420P;
306 else
307 pix_fmt = alt_pix_fmt;
308 }
309
310 if (raten == 0 && rated == 0) {
311 // Frame rate unknown
312 raten = 25;
313 rated = 1;
314 }
315
316 if (aspectn == 0 && aspectd == 0) {
317 // Pixel aspect unknown
318 aspectd = 1;
319 }
320
321 st = av_new_stream(s, 0);
322 st = s->streams[0];
323 st->codec->width = width;
324 st->codec->height = height;
325 av_reduce(&raten, &rated, raten, rated, (1UL<<31)-1);
326 av_set_pts_info(st, 64, rated, raten);
327 st->codec->pix_fmt = pix_fmt;
328 st->codec->codec_type = CODEC_TYPE_VIDEO;
329 st->codec->codec_id = CODEC_ID_RAWVIDEO;
330 st->codec->sample_aspect_ratio= (AVRational){aspectn, aspectd};
331
332 return 0;
333 }
334
335 static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
336 {
337 int i;
338 char header[MAX_FRAME_HEADER+1];
339 int packet_size, ret, width, height;
340 AVStream *st = s->streams[0];
341
342 for (i=0; i<MAX_FRAME_HEADER; i++) {
343 header[i] = get_byte(&s->pb);
344 if (header[i] == '\n') {
345 header[i+1] = 0;
346 break;
347 }
348 }
349 if (i == MAX_FRAME_HEADER) return -1;
350 if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) return -1;
351
352 width = st->codec->width;
353 height = st->codec->height;
354
355 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
356 if (packet_size < 0)
357 return -1;
358
359 if (av_get_packet(&s->pb, pkt, packet_size) != packet_size)
360 return AVERROR_IO;
361
362 pkt->stream_index = 0;
363 return 0;
364 }
365
366 static int yuv4_read_close(AVFormatContext *s)
367 {
368 return 0;
369 }
370
371 static int yuv4_probe(AVProbeData *pd)
372 {
373 /* check file header */
374 if (pd->buf_size <= sizeof(Y4M_MAGIC))
375 return 0;
376 if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC)-1)==0)
377 return AVPROBE_SCORE_MAX;
378 else
379 return 0;
380 }
381
382 AVInputFormat yuv4mpegpipe_iformat = {
383 "yuv4mpegpipe",
384 "YUV4MPEG pipe format",
385 0,
386 yuv4_probe,
387 yuv4_read_header,
388 yuv4_read_packet,
389 yuv4_read_close,
390 .extensions = "y4m"
391 };
392
393 int yuv4mpeg_init(void)
394 {
395 av_register_input_format(&yuv4mpegpipe_iformat);
396 #ifdef CONFIG_ENCODERS
397 av_register_output_format(&yuv4mpegpipe_oformat);
398 #endif //CONFIG_ENCODERS
399 return 0;
400 }
401