Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / yuv4mpegdec.c
... / ...
CommitLineData
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
30static 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
263static 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
304static 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
313AVInputFormat 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};