Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
6148 | serge | 1 | /* |
2 | * Wing Commander III Movie (.mve) File Demuxer |
||
3 | * Copyright (c) 2003 The ffmpeg Project |
||
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 | /** |
||
23 | * @file |
||
24 | * Wing Commander III Movie file demuxer |
||
25 | * by Mike Melanson (melanson@pcisys.net) |
||
26 | * for more information on the WC3 .mve file format, visit: |
||
27 | * http://www.pcisys.net/~melanson/codecs/ |
||
28 | */ |
||
29 | |||
30 | #include "libavutil/channel_layout.h" |
||
31 | #include "libavutil/intreadwrite.h" |
||
32 | #include "libavutil/dict.h" |
||
33 | #include "avformat.h" |
||
34 | #include "internal.h" |
||
35 | |||
36 | #define FORM_TAG MKTAG('F', 'O', 'R', 'M') |
||
37 | #define MOVE_TAG MKTAG('M', 'O', 'V', 'E') |
||
38 | #define PC__TAG MKTAG('_', 'P', 'C', '_') |
||
39 | #define SOND_TAG MKTAG('S', 'O', 'N', 'D') |
||
40 | #define BNAM_TAG MKTAG('B', 'N', 'A', 'M') |
||
41 | #define SIZE_TAG MKTAG('S', 'I', 'Z', 'E') |
||
42 | #define PALT_TAG MKTAG('P', 'A', 'L', 'T') |
||
43 | #define INDX_TAG MKTAG('I', 'N', 'D', 'X') |
||
44 | #define BRCH_TAG MKTAG('B', 'R', 'C', 'H') |
||
45 | #define SHOT_TAG MKTAG('S', 'H', 'O', 'T') |
||
46 | #define VGA__TAG MKTAG('V', 'G', 'A', ' ') |
||
47 | #define TEXT_TAG MKTAG('T', 'E', 'X', 'T') |
||
48 | #define AUDI_TAG MKTAG('A', 'U', 'D', 'I') |
||
49 | |||
50 | /* video resolution unless otherwise specified */ |
||
51 | #define WC3_DEFAULT_WIDTH 320 |
||
52 | #define WC3_DEFAULT_HEIGHT 165 |
||
53 | |||
54 | /* always use the same PCM audio parameters */ |
||
55 | #define WC3_SAMPLE_RATE 22050 |
||
56 | #define WC3_AUDIO_CHANNELS 1 |
||
57 | #define WC3_AUDIO_BITS 16 |
||
58 | |||
59 | /* nice, constant framerate */ |
||
60 | #define WC3_FRAME_FPS 15 |
||
61 | |||
62 | #define PALETTE_SIZE (256 * 3) |
||
63 | |||
64 | typedef struct Wc3DemuxContext { |
||
65 | int width; |
||
66 | int height; |
||
67 | int64_t pts; |
||
68 | int video_stream_index; |
||
69 | int audio_stream_index; |
||
70 | |||
71 | AVPacket vpkt; |
||
72 | |||
73 | } Wc3DemuxContext; |
||
74 | |||
75 | static int wc3_probe(AVProbeData *p) |
||
76 | { |
||
77 | if (p->buf_size < 12) |
||
78 | return 0; |
||
79 | |||
80 | if ((AV_RL32(&p->buf[0]) != FORM_TAG) || |
||
81 | (AV_RL32(&p->buf[8]) != MOVE_TAG)) |
||
82 | return 0; |
||
83 | |||
84 | return AVPROBE_SCORE_MAX; |
||
85 | } |
||
86 | |||
87 | static int wc3_read_header(AVFormatContext *s) |
||
88 | { |
||
89 | Wc3DemuxContext *wc3 = s->priv_data; |
||
90 | AVIOContext *pb = s->pb; |
||
91 | unsigned int fourcc_tag; |
||
92 | unsigned int size; |
||
93 | AVStream *st; |
||
94 | int ret = 0; |
||
95 | char *buffer; |
||
96 | |||
97 | /* default context members */ |
||
98 | wc3->width = WC3_DEFAULT_WIDTH; |
||
99 | wc3->height = WC3_DEFAULT_HEIGHT; |
||
100 | wc3->pts = 0; |
||
101 | wc3->video_stream_index = wc3->audio_stream_index = 0; |
||
102 | av_init_packet(&wc3->vpkt); |
||
103 | wc3->vpkt.data = NULL; wc3->vpkt.size = 0; |
||
104 | |||
105 | /* skip the first 3 32-bit numbers */ |
||
106 | avio_skip(pb, 12); |
||
107 | |||
108 | /* traverse through the chunks and load the header information before |
||
109 | * the first BRCH tag */ |
||
110 | fourcc_tag = avio_rl32(pb); |
||
111 | size = (avio_rb32(pb) + 1) & (~1); |
||
112 | |||
113 | do { |
||
114 | switch (fourcc_tag) { |
||
115 | |||
116 | case SOND_TAG: |
||
117 | case INDX_TAG: |
||
118 | /* SOND unknown, INDX unnecessary; ignore both */ |
||
119 | avio_skip(pb, size); |
||
120 | break; |
||
121 | |||
122 | case PC__TAG: |
||
123 | /* number of palettes, unneeded */ |
||
124 | avio_skip(pb, 12); |
||
125 | break; |
||
126 | |||
127 | case BNAM_TAG: |
||
128 | /* load up the name */ |
||
129 | buffer = av_malloc(size+1); |
||
130 | if (!buffer) |
||
131 | return AVERROR(ENOMEM); |
||
132 | if ((ret = avio_read(pb, buffer, size)) != size) |
||
133 | return AVERROR(EIO); |
||
134 | buffer[size] = 0; |
||
135 | av_dict_set(&s->metadata, "title", buffer, |
||
136 | AV_DICT_DONT_STRDUP_VAL); |
||
137 | break; |
||
138 | |||
139 | case SIZE_TAG: |
||
140 | /* video resolution override */ |
||
141 | wc3->width = avio_rl32(pb); |
||
142 | wc3->height = avio_rl32(pb); |
||
143 | break; |
||
144 | |||
145 | case PALT_TAG: |
||
146 | /* one of several palettes */ |
||
147 | avio_seek(pb, -8, SEEK_CUR); |
||
148 | av_append_packet(pb, &wc3->vpkt, 8 + PALETTE_SIZE); |
||
149 | break; |
||
150 | |||
151 | default: |
||
152 | av_log(s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n", |
||
153 | (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24), |
||
154 | (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24)); |
||
155 | return AVERROR_INVALIDDATA; |
||
156 | } |
||
157 | |||
158 | fourcc_tag = avio_rl32(pb); |
||
159 | /* chunk sizes are 16-bit aligned */ |
||
160 | size = (avio_rb32(pb) + 1) & (~1); |
||
161 | if (url_feof(pb)) |
||
162 | return AVERROR(EIO); |
||
163 | |||
164 | } while (fourcc_tag != BRCH_TAG); |
||
165 | |||
166 | /* initialize the decoder streams */ |
||
167 | st = avformat_new_stream(s, NULL); |
||
168 | if (!st) |
||
169 | return AVERROR(ENOMEM); |
||
170 | avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS); |
||
171 | wc3->video_stream_index = st->index; |
||
172 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
||
173 | st->codec->codec_id = AV_CODEC_ID_XAN_WC3; |
||
174 | st->codec->codec_tag = 0; /* no fourcc */ |
||
175 | st->codec->width = wc3->width; |
||
176 | st->codec->height = wc3->height; |
||
177 | |||
178 | st = avformat_new_stream(s, NULL); |
||
179 | if (!st) |
||
180 | return AVERROR(ENOMEM); |
||
181 | avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS); |
||
182 | wc3->audio_stream_index = st->index; |
||
183 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
||
184 | st->codec->codec_id = AV_CODEC_ID_PCM_S16LE; |
||
185 | st->codec->codec_tag = 1; |
||
186 | st->codec->channels = WC3_AUDIO_CHANNELS; |
||
187 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
||
188 | st->codec->bits_per_coded_sample = WC3_AUDIO_BITS; |
||
189 | st->codec->sample_rate = WC3_SAMPLE_RATE; |
||
190 | st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * |
||
191 | st->codec->bits_per_coded_sample; |
||
192 | st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS; |
||
193 | |||
194 | return 0; |
||
195 | } |
||
196 | |||
197 | static int wc3_read_packet(AVFormatContext *s, |
||
198 | AVPacket *pkt) |
||
199 | { |
||
200 | Wc3DemuxContext *wc3 = s->priv_data; |
||
201 | AVIOContext *pb = s->pb; |
||
202 | unsigned int fourcc_tag; |
||
203 | unsigned int size; |
||
204 | int packet_read = 0; |
||
205 | int ret = 0; |
||
206 | unsigned char text[1024]; |
||
207 | |||
208 | while (!packet_read) { |
||
209 | |||
210 | fourcc_tag = avio_rl32(pb); |
||
211 | /* chunk sizes are 16-bit aligned */ |
||
212 | size = (avio_rb32(pb) + 1) & (~1); |
||
213 | if (url_feof(pb)) |
||
214 | return AVERROR(EIO); |
||
215 | |||
216 | switch (fourcc_tag) { |
||
217 | |||
218 | case BRCH_TAG: |
||
219 | /* no-op */ |
||
220 | break; |
||
221 | |||
222 | case SHOT_TAG: |
||
223 | /* load up new palette */ |
||
224 | avio_seek(pb, -8, SEEK_CUR); |
||
225 | av_append_packet(pb, &wc3->vpkt, 8 + 4); |
||
226 | break; |
||
227 | |||
228 | case VGA__TAG: |
||
229 | /* send out video chunk */ |
||
230 | avio_seek(pb, -8, SEEK_CUR); |
||
231 | ret= av_append_packet(pb, &wc3->vpkt, 8 + size); |
||
232 | // ignore error if we have some data |
||
233 | if (wc3->vpkt.size > 0) |
||
234 | ret = 0; |
||
235 | *pkt = wc3->vpkt; |
||
236 | wc3->vpkt.data = NULL; wc3->vpkt.size = 0; |
||
237 | pkt->stream_index = wc3->video_stream_index; |
||
238 | pkt->pts = wc3->pts; |
||
239 | packet_read = 1; |
||
240 | break; |
||
241 | |||
242 | case TEXT_TAG: |
||
243 | /* subtitle chunk */ |
||
244 | #if 0 |
||
245 | avio_skip(pb, size); |
||
246 | #else |
||
247 | if ((unsigned)size > sizeof(text) || (ret = avio_read(pb, text, size)) != size) |
||
248 | ret = AVERROR(EIO); |
||
249 | else { |
||
250 | int i = 0; |
||
251 | av_log (s, AV_LOG_DEBUG, "Subtitle time!\n"); |
||
252 | av_log (s, AV_LOG_DEBUG, " inglish: %s\n", &text[i + 1]); |
||
253 | i += text[i] + 1; |
||
254 | av_log (s, AV_LOG_DEBUG, " doytsch: %s\n", &text[i + 1]); |
||
255 | i += text[i] + 1; |
||
256 | av_log (s, AV_LOG_DEBUG, " fronsay: %s\n", &text[i + 1]); |
||
257 | } |
||
258 | #endif |
||
259 | break; |
||
260 | |||
261 | case AUDI_TAG: |
||
262 | /* send out audio chunk */ |
||
263 | ret= av_get_packet(pb, pkt, size); |
||
264 | pkt->stream_index = wc3->audio_stream_index; |
||
265 | pkt->pts = wc3->pts; |
||
266 | |||
267 | /* time to advance pts */ |
||
268 | wc3->pts++; |
||
269 | |||
270 | packet_read = 1; |
||
271 | break; |
||
272 | |||
273 | default: |
||
274 | av_log (s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n", |
||
275 | (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24), |
||
276 | (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24)); |
||
277 | ret = AVERROR_INVALIDDATA; |
||
278 | packet_read = 1; |
||
279 | break; |
||
280 | } |
||
281 | } |
||
282 | |||
283 | return ret; |
||
284 | } |
||
285 | |||
286 | static int wc3_read_close(AVFormatContext *s) |
||
287 | { |
||
288 | Wc3DemuxContext *wc3 = s->priv_data; |
||
289 | |||
290 | if (wc3->vpkt.size > 0) |
||
291 | av_free_packet(&wc3->vpkt); |
||
292 | |||
293 | return 0; |
||
294 | } |
||
295 | |||
296 | AVInputFormat ff_wc3_demuxer = { |
||
297 | .name = "wc3movie", |
||
298 | .long_name = NULL_IF_CONFIG_SMALL("Wing Commander III movie"), |
||
299 | .priv_data_size = sizeof(Wc3DemuxContext), |
||
300 | .read_probe = wc3_probe, |
||
301 | .read_header = wc3_read_header, |
||
302 | .read_packet = wc3_read_packet, |
||
303 | .read_close = wc3_read_close, |
||
304 | };> |