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2ba45a60 DM |
1 | /* |
2 | * YUV4MPEG demuxer | |
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 "avformat.h" | |
23 | #include "internal.h" | |
24 | #include "yuv4mpeg.h" | |
25 | ||
26 | /* Header size increased to allow room for optional flags */ | |
27 | #define MAX_YUV4_HEADER 80 | |
28 | #define MAX_FRAME_HEADER 80 | |
29 | ||
30 | static int yuv4_read_header(AVFormatContext *s) | |
31 | { | |
32 | char header[MAX_YUV4_HEADER + 10]; // Include headroom for | |
33 | // the longest option | |
34 | char *tokstart, *tokend, *header_end; | |
35 | int i; | |
36 | AVIOContext *pb = s->pb; | |
37 | int width = -1, height = -1, raten = 0, | |
38 | rated = 0, aspectn = 0, aspectd = 0; | |
39 | enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE; | |
40 | enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED; | |
41 | AVStream *st; | |
42 | enum AVFieldOrder field_order; | |
43 | ||
44 | for (i = 0; i < MAX_YUV4_HEADER; i++) { | |
45 | header[i] = avio_r8(pb); | |
46 | if (header[i] == '\n') { | |
47 | header[i + 1] = 0x20; // Add a space after last option. | |
48 | // Makes parsing "444" vs "444alpha" easier. | |
49 | header[i + 2] = 0; | |
50 | break; | |
51 | } | |
52 | } | |
53 | if (i == MAX_YUV4_HEADER) | |
54 | return -1; | |
55 | if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) | |
56 | return -1; | |
57 | ||
58 | header_end = &header[i + 1]; // Include space | |
59 | for (tokstart = &header[strlen(Y4M_MAGIC) + 1]; | |
60 | tokstart < header_end; tokstart++) { | |
61 | if (*tokstart == 0x20) | |
62 | continue; | |
63 | switch (*tokstart++) { | |
64 | case 'W': // Width. Required. | |
65 | width = strtol(tokstart, &tokend, 10); | |
66 | tokstart = tokend; | |
67 | break; | |
68 | case 'H': // Height. Required. | |
69 | height = strtol(tokstart, &tokend, 10); | |
70 | tokstart = tokend; | |
71 | break; | |
72 | case 'C': // Color space | |
73 | if (strncmp("420jpeg", tokstart, 7) == 0) { | |
74 | pix_fmt = AV_PIX_FMT_YUV420P; | |
75 | chroma_sample_location = AVCHROMA_LOC_CENTER; | |
76 | } else if (strncmp("420mpeg2", tokstart, 8) == 0) { | |
77 | pix_fmt = AV_PIX_FMT_YUV420P; | |
78 | chroma_sample_location = AVCHROMA_LOC_LEFT; | |
79 | } else if (strncmp("420paldv", tokstart, 8) == 0) { | |
80 | pix_fmt = AV_PIX_FMT_YUV420P; | |
81 | chroma_sample_location = AVCHROMA_LOC_TOPLEFT; | |
82 | } else if (strncmp("420p16", tokstart, 6) == 0) { | |
83 | pix_fmt = AV_PIX_FMT_YUV420P16; | |
84 | } else if (strncmp("422p16", tokstart, 6) == 0) { | |
85 | pix_fmt = AV_PIX_FMT_YUV422P16; | |
86 | } else if (strncmp("444p16", tokstart, 6) == 0) { | |
87 | pix_fmt = AV_PIX_FMT_YUV444P16; | |
88 | } else if (strncmp("420p14", tokstart, 6) == 0) { | |
89 | pix_fmt = AV_PIX_FMT_YUV420P14; | |
90 | } else if (strncmp("422p14", tokstart, 6) == 0) { | |
91 | pix_fmt = AV_PIX_FMT_YUV422P14; | |
92 | } else if (strncmp("444p14", tokstart, 6) == 0) { | |
93 | pix_fmt = AV_PIX_FMT_YUV444P14; | |
94 | } else if (strncmp("420p12", tokstart, 6) == 0) { | |
95 | pix_fmt = AV_PIX_FMT_YUV420P12; | |
96 | } else if (strncmp("422p12", tokstart, 6) == 0) { | |
97 | pix_fmt = AV_PIX_FMT_YUV422P12; | |
98 | } else if (strncmp("444p12", tokstart, 6) == 0) { | |
99 | pix_fmt = AV_PIX_FMT_YUV444P12; | |
100 | } else if (strncmp("420p10", tokstart, 6) == 0) { | |
101 | pix_fmt = AV_PIX_FMT_YUV420P10; | |
102 | } else if (strncmp("422p10", tokstart, 6) == 0) { | |
103 | pix_fmt = AV_PIX_FMT_YUV422P10; | |
104 | } else if (strncmp("444p10", tokstart, 6) == 0) { | |
105 | pix_fmt = AV_PIX_FMT_YUV444P10; | |
106 | } else if (strncmp("420p9", tokstart, 5) == 0) { | |
107 | pix_fmt = AV_PIX_FMT_YUV420P9; | |
108 | } else if (strncmp("422p9", tokstart, 5) == 0) { | |
109 | pix_fmt = AV_PIX_FMT_YUV422P9; | |
110 | } else if (strncmp("444p9", tokstart, 5) == 0) { | |
111 | pix_fmt = AV_PIX_FMT_YUV444P9; | |
112 | } else if (strncmp("420", tokstart, 3) == 0) { | |
113 | pix_fmt = AV_PIX_FMT_YUV420P; | |
114 | chroma_sample_location = AVCHROMA_LOC_CENTER; | |
115 | } else if (strncmp("411", tokstart, 3) == 0) { | |
116 | pix_fmt = AV_PIX_FMT_YUV411P; | |
117 | } else if (strncmp("422", tokstart, 3) == 0) { | |
118 | pix_fmt = AV_PIX_FMT_YUV422P; | |
119 | } else if (strncmp("444alpha", tokstart, 8) == 0 ) { | |
120 | av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 " | |
121 | "YUV4MPEG stream.\n"); | |
122 | return -1; | |
123 | } else if (strncmp("444", tokstart, 3) == 0) { | |
124 | pix_fmt = AV_PIX_FMT_YUV444P; | |
125 | } else if (strncmp("mono16", tokstart, 6) == 0) { | |
126 | pix_fmt = AV_PIX_FMT_GRAY16; | |
127 | } else if (strncmp("mono", tokstart, 4) == 0) { | |
128 | pix_fmt = AV_PIX_FMT_GRAY8; | |
129 | } else { | |
130 | av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown " | |
131 | "pixel format.\n"); | |
132 | return -1; | |
133 | } | |
134 | while (tokstart < header_end && *tokstart != 0x20) | |
135 | tokstart++; | |
136 | break; | |
137 | case 'I': // Interlace type | |
138 | switch (*tokstart++){ | |
139 | case '?': | |
140 | field_order = AV_FIELD_UNKNOWN; | |
141 | break; | |
142 | case 'p': | |
143 | field_order = AV_FIELD_PROGRESSIVE; | |
144 | break; | |
145 | case 't': | |
146 | field_order = AV_FIELD_TT; | |
147 | break; | |
148 | case 'b': | |
149 | field_order = AV_FIELD_BB; | |
150 | break; | |
151 | case 'm': | |
152 | av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed " | |
153 | "interlaced and non-interlaced frames.\n"); | |
154 | default: | |
155 | av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); | |
156 | return AVERROR(EINVAL); | |
157 | } | |
158 | break; | |
159 | case 'F': // Frame rate | |
160 | sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown | |
161 | while (tokstart < header_end && *tokstart != 0x20) | |
162 | tokstart++; | |
163 | break; | |
164 | case 'A': // Pixel aspect | |
165 | sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown | |
166 | while (tokstart < header_end && *tokstart != 0x20) | |
167 | tokstart++; | |
168 | break; | |
169 | case 'X': // Vendor extensions | |
170 | if (strncmp("YSCSS=", tokstart, 6) == 0) { | |
171 | // Older nonstandard pixel format representation | |
172 | tokstart += 6; | |
173 | if (strncmp("420JPEG", tokstart, 7) == 0) | |
174 | alt_pix_fmt = AV_PIX_FMT_YUV420P; | |
175 | else if (strncmp("420MPEG2", tokstart, 8) == 0) | |
176 | alt_pix_fmt = AV_PIX_FMT_YUV420P; | |
177 | else if (strncmp("420PALDV", tokstart, 8) == 0) | |
178 | alt_pix_fmt = AV_PIX_FMT_YUV420P; | |
179 | else if (strncmp("420P9", tokstart, 5) == 0) | |
180 | alt_pix_fmt = AV_PIX_FMT_YUV420P9; | |
181 | else if (strncmp("422P9", tokstart, 5) == 0) | |
182 | alt_pix_fmt = AV_PIX_FMT_YUV422P9; | |
183 | else if (strncmp("444P9", tokstart, 5) == 0) | |
184 | alt_pix_fmt = AV_PIX_FMT_YUV444P9; | |
185 | else if (strncmp("420P10", tokstart, 6) == 0) | |
186 | alt_pix_fmt = AV_PIX_FMT_YUV420P10; | |
187 | else if (strncmp("422P10", tokstart, 6) == 0) | |
188 | alt_pix_fmt = AV_PIX_FMT_YUV422P10; | |
189 | else if (strncmp("444P10", tokstart, 6) == 0) | |
190 | alt_pix_fmt = AV_PIX_FMT_YUV444P10; | |
191 | else if (strncmp("420P12", tokstart, 6) == 0) | |
192 | alt_pix_fmt = AV_PIX_FMT_YUV420P12; | |
193 | else if (strncmp("422P12", tokstart, 6) == 0) | |
194 | alt_pix_fmt = AV_PIX_FMT_YUV422P12; | |
195 | else if (strncmp("444P12", tokstart, 6) == 0) | |
196 | alt_pix_fmt = AV_PIX_FMT_YUV444P12; | |
197 | else if (strncmp("420P14", tokstart, 6) == 0) | |
198 | alt_pix_fmt = AV_PIX_FMT_YUV420P14; | |
199 | else if (strncmp("422P14", tokstart, 6) == 0) | |
200 | alt_pix_fmt = AV_PIX_FMT_YUV422P14; | |
201 | else if (strncmp("444P14", tokstart, 6) == 0) | |
202 | alt_pix_fmt = AV_PIX_FMT_YUV444P14; | |
203 | else if (strncmp("420P16", tokstart, 6) == 0) | |
204 | alt_pix_fmt = AV_PIX_FMT_YUV420P16; | |
205 | else if (strncmp("422P16", tokstart, 6) == 0) | |
206 | alt_pix_fmt = AV_PIX_FMT_YUV422P16; | |
207 | else if (strncmp("444P16", tokstart, 6) == 0) | |
208 | alt_pix_fmt = AV_PIX_FMT_YUV444P16; | |
209 | else if (strncmp("411", tokstart, 3) == 0) | |
210 | alt_pix_fmt = AV_PIX_FMT_YUV411P; | |
211 | else if (strncmp("422", tokstart, 3) == 0) | |
212 | alt_pix_fmt = AV_PIX_FMT_YUV422P; | |
213 | else if (strncmp("444", tokstart, 3) == 0) | |
214 | alt_pix_fmt = AV_PIX_FMT_YUV444P; | |
215 | } | |
216 | while (tokstart < header_end && *tokstart != 0x20) | |
217 | tokstart++; | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | if (width == -1 || height == -1) { | |
223 | av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); | |
224 | return -1; | |
225 | } | |
226 | ||
227 | if (pix_fmt == AV_PIX_FMT_NONE) { | |
228 | if (alt_pix_fmt == AV_PIX_FMT_NONE) | |
229 | pix_fmt = AV_PIX_FMT_YUV420P; | |
230 | else | |
231 | pix_fmt = alt_pix_fmt; | |
232 | } | |
233 | ||
234 | if (raten <= 0 || rated <= 0) { | |
235 | // Frame rate unknown | |
236 | raten = 25; | |
237 | rated = 1; | |
238 | } | |
239 | ||
240 | if (aspectn == 0 && aspectd == 0) { | |
241 | // Pixel aspect unknown | |
242 | aspectd = 1; | |
243 | } | |
244 | ||
245 | st = avformat_new_stream(s, NULL); | |
246 | if (!st) | |
247 | return AVERROR(ENOMEM); | |
248 | st->codec->width = width; | |
249 | st->codec->height = height; | |
250 | av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1); | |
251 | avpriv_set_pts_info(st, 64, rated, raten); | |
252 | st->avg_frame_rate = av_inv_q(st->time_base); | |
253 | st->codec->pix_fmt = pix_fmt; | |
254 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
255 | st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; | |
256 | st->sample_aspect_ratio = (AVRational){ aspectn, aspectd }; | |
257 | st->codec->chroma_sample_location = chroma_sample_location; | |
258 | st->codec->field_order = field_order; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt) | |
264 | { | |
265 | int i; | |
266 | char header[MAX_FRAME_HEADER+1]; | |
267 | int packet_size, width, height, ret; | |
268 | AVStream *st = s->streams[0]; | |
269 | ||
270 | for (i = 0; i < MAX_FRAME_HEADER; i++) { | |
271 | header[i] = avio_r8(s->pb); | |
272 | if (header[i] == '\n') { | |
273 | header[i + 1] = 0; | |
274 | break; | |
275 | } | |
276 | } | |
277 | if (s->pb->error) | |
278 | return s->pb->error; | |
279 | else if (s->pb->eof_reached) | |
280 | return AVERROR_EOF; | |
281 | else if (i == MAX_FRAME_HEADER) | |
282 | return AVERROR_INVALIDDATA; | |
283 | ||
284 | if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) | |
285 | return AVERROR_INVALIDDATA; | |
286 | ||
287 | width = st->codec->width; | |
288 | height = st->codec->height; | |
289 | ||
290 | packet_size = avpicture_get_size(st->codec->pix_fmt, width, height); | |
291 | if (packet_size < 0) | |
292 | return packet_size; | |
293 | ||
294 | ret = av_get_packet(s->pb, pkt, packet_size); | |
295 | if (ret < 0) | |
296 | return ret; | |
297 | else if (ret != packet_size) | |
298 | return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO); | |
299 | ||
300 | pkt->stream_index = 0; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static int yuv4_probe(AVProbeData *pd) | |
305 | { | |
306 | /* check file header */ | |
307 | if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0) | |
308 | return AVPROBE_SCORE_MAX; | |
309 | else | |
310 | return 0; | |
311 | } | |
312 | ||
313 | AVInputFormat ff_yuv4mpegpipe_demuxer = { | |
314 | .name = "yuv4mpegpipe", | |
315 | .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"), | |
316 | .read_probe = yuv4_probe, | |
317 | .read_header = yuv4_read_header, | |
318 | .read_packet = yuv4_read_packet, | |
319 | .extensions = "y4m", | |
320 | }; |