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ffmpeg / libavformat / rmdec.c @ 24c3da16

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1 de6d9b64 Fabrice Bellard
/*
2 7b2a2ce5 Aurelien Jacobs
 * "Real" compatible demuxer.
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21 245976da Diego Biurrun
22
#include "libavutil/avstring.h"
23 de6d9b64 Fabrice Bellard
#include "avformat.h"
24 7b2a2ce5 Aurelien Jacobs
#include "rm.h"
25 de6d9b64 Fabrice Bellard
26 36cf20f5 Ronald S. Bultje
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
27 de6d9b64 Fabrice Bellard
{
28 36cf20f5 Ronald S. Bultje
    int i;
29 28263f5f Ronald S. Bultje
    char *q, r;
30 de6d9b64 Fabrice Bellard
31
    q = buf;
32
    for(i=0;i<len;i++) {
33 28263f5f Ronald S. Bultje
        r = get_byte(pb);
34 de6d9b64 Fabrice Bellard
        if (i < buf_size - 1)
35 28263f5f Ronald S. Bultje
            *q++ = r;
36 de6d9b64 Fabrice Bellard
    }
37 28263f5f Ronald S. Bultje
    if (buf_size > 0) *q = '\0';
38 de6d9b64 Fabrice Bellard
}
39
40 36cf20f5 Ronald S. Bultje
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
41 de6d9b64 Fabrice Bellard
{
42 36cf20f5 Ronald S. Bultje
    get_strl(pb, buf, buf_size, get_be16(pb));
43
}
44 de6d9b64 Fabrice Bellard
45 36cf20f5 Ronald S. Bultje
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
46
{
47
    get_strl(pb, buf, buf_size, get_byte(pb));
48 de6d9b64 Fabrice Bellard
}
49
50 a9d4a6ef Roberto Togni
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
51 c9510803 Fabrice Bellard
                                      int read_all)
52
{
53 e0f7e329 Benjamin Larsson
    RMContext *rm = s->priv_data;
54 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
55 1e4668d1 Roberto Togni
    char buf[256];
56 c9510803 Fabrice Bellard
    uint32_t version;
57
    int i;
58
59
    /* ra type header */
60
    version = get_be32(pb); /* version */
61
    if (((version >> 16) & 0xff) == 3) {
62 1e4668d1 Roberto Togni
        int64_t startpos = url_ftell(pb);
63 c9510803 Fabrice Bellard
        /* very old version */
64
        for(i = 0; i < 14; i++)
65
            get_byte(pb);
66
        get_str8(pb, s->title, sizeof(s->title));
67
        get_str8(pb, s->author, sizeof(s->author));
68
        get_str8(pb, s->copyright, sizeof(s->copyright));
69
        get_str8(pb, s->comment, sizeof(s->comment));
70 1e4668d1 Roberto Togni
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
71
        // fourcc (should always be "lpcJ")
72 c9510803 Fabrice Bellard
        get_byte(pb);
73
        get_str8(pb, buf, sizeof(buf));
74 1e4668d1 Roberto Togni
        }
75
        // Skip extra header crap (this should never happen)
76
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
77
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
78 01f4895c Michael Niedermayer
        st->codec->sample_rate = 8000;
79
        st->codec->channels = 1;
80
        st->codec->codec_type = CODEC_TYPE_AUDIO;
81
        st->codec->codec_id = CODEC_ID_RA_144;
82 c9510803 Fabrice Bellard
    } else {
83 e0f7e329 Benjamin Larsson
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
84 c9510803 Fabrice Bellard
        /* old version (4) */
85
        get_be32(pb); /* .ra4 */
86 72aef198 Michael Niedermayer
        get_be32(pb); /* data size */
87
        get_be16(pb); /* version2 */
88 c9510803 Fabrice Bellard
        get_be32(pb); /* header size */
89 72aef198 Michael Niedermayer
        flavor= get_be16(pb); /* add codec info / flavor */
90 e0f7e329 Benjamin Larsson
        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
91 c9510803 Fabrice Bellard
        get_be32(pb); /* ??? */
92
        get_be32(pb); /* ??? */
93
        get_be32(pb); /* ??? */
94 115329f1 Diego Biurrun
        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
95 01f4895c Michael Niedermayer
        st->codec->block_align= get_be16(pb); /* frame size */
96 e0f7e329 Benjamin Larsson
        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
97 72aef198 Michael Niedermayer
        get_be16(pb); /* ??? */
98 e0f7e329 Benjamin Larsson
        if (((version >> 16) & 0xff) == 5) {
99
            get_be16(pb); get_be16(pb); get_be16(pb); }
100 01f4895c Michael Niedermayer
        st->codec->sample_rate = get_be16(pb);
101 c9510803 Fabrice Bellard
        get_be32(pb);
102 01f4895c Michael Niedermayer
        st->codec->channels = get_be16(pb);
103 e0f7e329 Benjamin Larsson
        if (((version >> 16) & 0xff) == 5) {
104
            get_be32(pb);
105 bb270c08 Diego Biurrun
            buf[0] = get_byte(pb);
106
            buf[1] = get_byte(pb);
107
            buf[2] = get_byte(pb);
108
            buf[3] = get_byte(pb);
109
            buf[4] = 0;
110
        } else {
111 e344c1ea Steve L'Homme
            get_str8(pb, buf, sizeof(buf)); /* desc */
112
            get_str8(pb, buf, sizeof(buf)); /* desc */
113 bb270c08 Diego Biurrun
        }
114 01f4895c Michael Niedermayer
        st->codec->codec_type = CODEC_TYPE_AUDIO;
115 c9510803 Fabrice Bellard
        if (!strcmp(buf, "dnet")) {
116 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_AC3;
117 bf415121 Justin Ruggles
            st->need_parsing = AVSTREAM_PARSE_FULL;
118 72aef198 Michael Niedermayer
        } else if (!strcmp(buf, "28_8")) {
119 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_RA_288;
120 e0f7e329 Benjamin Larsson
            st->codec->extradata_size= 0;
121
            rm->audio_framesize = st->codec->block_align;
122
            st->codec->block_align = coded_framesize;
123 a443a253 Michael Niedermayer
124
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
125
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
126
                return -1;
127
            }
128
129 e0f7e329 Benjamin Larsson
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
130 10e26bc7 Benjamin Larsson
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
131 e0f7e329 Benjamin Larsson
            int codecdata_length, i;
132
            get_be16(pb); get_byte(pb);
133
            if (((version >> 16) & 0xff) == 5)
134
                get_byte(pb);
135
            codecdata_length = get_be32(pb);
136 a443a253 Michael Niedermayer
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
137
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
138
                return -1;
139
            }
140
141 10e26bc7 Benjamin Larsson
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
142
            else st->codec->codec_id = CODEC_ID_ATRAC3;
143 e0f7e329 Benjamin Larsson
            st->codec->extradata_size= codecdata_length;
144 d76319b1 Jindřich Makovička
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
145 e0f7e329 Benjamin Larsson
            for(i = 0; i < codecdata_length; i++)
146
                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
147
            rm->audio_framesize = st->codec->block_align;
148
            st->codec->block_align = rm->sub_packet_size;
149 a443a253 Michael Niedermayer
150
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
151
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
152
                return -1;
153
            }
154
155 e0f7e329 Benjamin Larsson
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
156 a194f595 Roberto Togni
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
157
            int codecdata_length, i;
158
            get_be16(pb); get_byte(pb);
159
            if (((version >> 16) & 0xff) == 5)
160
                get_byte(pb);
161
            st->codec->codec_id = CODEC_ID_AAC;
162
            codecdata_length = get_be32(pb);
163 a9d4a6ef Roberto Togni
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
164
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
165
                return -1;
166
            }
167 a194f595 Roberto Togni
            if (codecdata_length >= 1) {
168
                st->codec->extradata_size = codecdata_length - 1;
169
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
170
                get_byte(pb);
171
                for(i = 0; i < st->codec->extradata_size; i++)
172
                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
173
            }
174 c9510803 Fabrice Bellard
        } else {
175 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_NONE;
176 75e61b0e Måns Rullgård
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
177 c9510803 Fabrice Bellard
        }
178
        if (read_all) {
179
            get_byte(pb);
180
            get_byte(pb);
181
            get_byte(pb);
182 115329f1 Diego Biurrun
183 c9510803 Fabrice Bellard
            get_str8(pb, s->title, sizeof(s->title));
184
            get_str8(pb, s->author, sizeof(s->author));
185
            get_str8(pb, s->copyright, sizeof(s->copyright));
186
            get_str8(pb, s->comment, sizeof(s->comment));
187
        }
188
    }
189 a9d4a6ef Roberto Togni
    return 0;
190 c9510803 Fabrice Bellard
}
191
192 0fd36362 Ronald S. Bultje
int
193 79d5045d Ronald S. Bultje
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st, int codec_data_size)
194 ff1463dc Ronald S. Bultje
{
195 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
196 ff1463dc Ronald S. Bultje
    unsigned int v;
197 79d5045d Ronald S. Bultje
    int size;
198 ff1463dc Ronald S. Bultje
    int64_t codec_pos;
199
200 15995030 Ronald S. Bultje
    av_set_pts_info(st, 64, 1, 1000);
201 ff1463dc Ronald S. Bultje
    codec_pos = url_ftell(pb);
202
    v = get_be32(pb);
203
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
204
        /* ra type header */
205
        if (rm_read_audio_stream_info(s, st, 0))
206
            return -1;
207
    } else {
208
        int fps, fps2;
209
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
210
        fail1:
211
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
212
            goto skip;
213
        }
214
        st->codec->codec_tag = get_le32(pb);
215
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
216
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
217
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
218
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
219
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
220
            goto fail1;
221
        st->codec->width = get_be16(pb);
222
        st->codec->height = get_be16(pb);
223
        st->codec->time_base.num= 1;
224
        fps= get_be16(pb);
225
        st->codec->codec_type = CODEC_TYPE_VIDEO;
226
        get_be32(pb);
227
        fps2= get_be16(pb);
228
        get_be16(pb);
229
230
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
231
232
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
233
            //check is redundant as get_buffer() will catch this
234
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
235
            return -1;
236
        }
237
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
238 437fd77b Panagiotis Issaris
        if (!st->codec->extradata)
239
            return AVERROR(ENOMEM);
240 ff1463dc Ronald S. Bultje
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
241
242
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
243
        st->codec->time_base.den = fps * st->codec->time_base.num;
244
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
245
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
246
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
247
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
248
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
249
        default: goto fail1;
250
        }
251
    }
252
253
skip:
254
    /* skip codec info */
255
    size = url_ftell(pb) - codec_pos;
256
    url_fskip(pb, codec_data_size - size);
257
258 36c9e40a Benoit Fouet
    return 0;
259 ff1463dc Ronald S. Bultje
}
260
261
262 c9510803 Fabrice Bellard
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
263
{
264
    RMContext *rm = s->priv_data;
265
    AVStream *st;
266
267
    rm->old_format = 1;
268
    st = av_new_stream(s, 0);
269
    if (!st)
270 a9d4a6ef Roberto Togni
        return -1;
271
    return rm_read_audio_stream_info(s, st, 1);
272 c9510803 Fabrice Bellard
}
273
274 de6d9b64 Fabrice Bellard
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
275
{
276 c9a65ca8 Fabrice Bellard
    RMContext *rm = s->priv_data;
277 de6d9b64 Fabrice Bellard
    AVStream *st;
278 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
279 ff1463dc Ronald S. Bultje
    unsigned int tag;
280 07cb073b Diego Biurrun
    int tag_size;
281 36c32bdd Diego Biurrun
    unsigned int start_time, duration;
282 de6d9b64 Fabrice Bellard
    char buf[128];
283 5d6ef63f Philip Gladstone
    int flags = 0;
284 de6d9b64 Fabrice Bellard
285 c9510803 Fabrice Bellard
    tag = get_le32(pb);
286
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
287
        /* very old .ra format */
288
        return rm_read_header_old(s, ap);
289
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
290 6f3e0b21 Panagiotis Issaris
        return AVERROR(EIO);
291 c9510803 Fabrice Bellard
    }
292 de6d9b64 Fabrice Bellard
293
    get_be32(pb); /* header size */
294
    get_be16(pb);
295
    get_be32(pb);
296
    get_be32(pb); /* number of headers */
297 115329f1 Diego Biurrun
298 de6d9b64 Fabrice Bellard
    for(;;) {
299
        if (url_feof(pb))
300 ccafd472 Baptiste Coudurier
            return -1;
301 de6d9b64 Fabrice Bellard
        tag = get_le32(pb);
302
        tag_size = get_be32(pb);
303
        get_be16(pb);
304
#if 0
305 115329f1 Diego Biurrun
        printf("tag=%c%c%c%c (%08x) size=%d\n",
306 de6d9b64 Fabrice Bellard
               (tag) & 0xff,
307
               (tag >> 8) & 0xff,
308
               (tag >> 16) & 0xff,
309
               (tag >> 24) & 0xff,
310
               tag,
311
               tag_size);
312
#endif
313 9786bd4d Michael Niedermayer
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
314 ccafd472 Baptiste Coudurier
            return -1;
315 de6d9b64 Fabrice Bellard
        switch(tag) {
316
        case MKTAG('P', 'R', 'O', 'P'):
317
            /* file header */
318
            get_be32(pb); /* max bit rate */
319
            get_be32(pb); /* avg bit rate */
320
            get_be32(pb); /* max packet size */
321
            get_be32(pb); /* avg packet size */
322
            get_be32(pb); /* nb packets */
323
            get_be32(pb); /* duration */
324
            get_be32(pb); /* preroll */
325
            get_be32(pb); /* index offset */
326
            get_be32(pb); /* data offset */
327
            get_be16(pb); /* nb streams */
328 5d6ef63f Philip Gladstone
            flags = get_be16(pb); /* flags */
329 de6d9b64 Fabrice Bellard
            break;
330
        case MKTAG('C', 'O', 'N', 'T'):
331 36cf20f5 Ronald S. Bultje
            get_str16(pb, s->title, sizeof(s->title));
332
            get_str16(pb, s->author, sizeof(s->author));
333
            get_str16(pb, s->copyright, sizeof(s->copyright));
334
            get_str16(pb, s->comment, sizeof(s->comment));
335 de6d9b64 Fabrice Bellard
            break;
336
        case MKTAG('M', 'D', 'P', 'R'):
337 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
338 de6d9b64 Fabrice Bellard
            if (!st)
339 ccafd472 Baptiste Coudurier
                return AVERROR(ENOMEM);
340 de6d9b64 Fabrice Bellard
            st->id = get_be16(pb);
341
            get_be32(pb); /* max bit rate */
342 01f4895c Michael Niedermayer
            st->codec->bit_rate = get_be32(pb); /* bit rate */
343 de6d9b64 Fabrice Bellard
            get_be32(pb); /* max packet size */
344
            get_be32(pb); /* avg packet size */
345 247eadca Fabrice Bellard
            start_time = get_be32(pb); /* start time */
346 de6d9b64 Fabrice Bellard
            get_be32(pb); /* preroll */
347 247eadca Fabrice Bellard
            duration = get_be32(pb); /* duration */
348 c0df9d75 Michael Niedermayer
            st->start_time = start_time;
349
            st->duration = duration;
350 de6d9b64 Fabrice Bellard
            get_str8(pb, buf, sizeof(buf)); /* desc */
351
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
352 01f4895c Michael Niedermayer
            st->codec->codec_type = CODEC_TYPE_DATA;
353 79d5045d Ronald S. Bultje
            if (ff_rm_read_mdpr_codecdata(s, st, get_be32(pb)) < 0)
354 ff1463dc Ronald S. Bultje
                return -1;
355 de6d9b64 Fabrice Bellard
            break;
356
        case MKTAG('D', 'A', 'T', 'A'):
357
            goto header_end;
358
        default:
359
            /* unknown tag: skip it */
360
            url_fskip(pb, tag_size - 10);
361
            break;
362
        }
363
    }
364
 header_end:
365
    rm->nb_packets = get_be32(pb); /* number of packets */
366 5d6ef63f Philip Gladstone
    if (!rm->nb_packets && (flags & 4))
367
        rm->nb_packets = 3600 * 25;
368 de6d9b64 Fabrice Bellard
    get_be32(pb); /* next data header */
369 383b123e Kostya Shishkov
    rm->curpic_num = -1;
370 de6d9b64 Fabrice Bellard
    return 0;
371
}
372
373 4c2bc159 Michael Niedermayer
static int get_num(ByteIOContext *pb, int *len)
374
{
375
    int n, n1;
376
377
    n = get_be16(pb);
378
    (*len)-=2;
379 e3052ce7 Roberto Togni
    n &= 0x7FFF;
380 4c2bc159 Michael Niedermayer
    if (n >= 0x4000) {
381
        return n - 0x4000;
382
    } else {
383
        n1 = get_be16(pb);
384
        (*len)-=2;
385
        return (n << 16) | n1;
386
    }
387
}
388
389 c9510803 Fabrice Bellard
/* multiple of 20 bytes for ra144 (ugly) */
390
#define RAW_PACKET_SIZE 1000
391
392 37e85dac Michael Niedermayer
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
393 bc17df09 Michael Niedermayer
    RMContext *rm = s->priv_data;
394 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
395 bc17df09 Michael Niedermayer
    int len, num, res, i;
396
    AVStream *st;
397 119cebf4 Michael Niedermayer
    uint32_t state=0xFFFFFFFF;
398 bc17df09 Michael Niedermayer
399
    while(!url_feof(pb)){
400 fd31550d Michael Niedermayer
        *pos= url_ftell(pb) - 3;
401 bc17df09 Michael Niedermayer
        if(rm->remaining_len > 0){
402
            num= rm->current_stream;
403
            len= rm->remaining_len;
404
            *timestamp = AV_NOPTS_VALUE;
405
            *flags= 0;
406
        }else{
407 119cebf4 Michael Niedermayer
            state= (state<<8) + get_byte(pb);
408 115329f1 Diego Biurrun
409 119cebf4 Michael Niedermayer
            if(state == MKBETAG('I', 'N', 'D', 'X')){
410
                len = get_be16(pb) - 6;
411
                if(len<0)
412
                    continue;
413
                goto skip;
414
            }
415 115329f1 Diego Biurrun
416 119cebf4 Michael Niedermayer
            if(state > (unsigned)0xFFFF || state < 12)
417 bc17df09 Michael Niedermayer
                continue;
418 119cebf4 Michael Niedermayer
            len=state;
419
            state= 0xFFFFFFFF;
420
421 bc17df09 Michael Niedermayer
            num = get_be16(pb);
422
            *timestamp = get_be32(pb);
423
            res= get_byte(pb); /* reserved */
424
            *flags = get_byte(pb); /* flags */
425 37e85dac Michael Niedermayer
426 115329f1 Diego Biurrun
427 bc17df09 Michael Niedermayer
            len -= 12;
428
        }
429
        for(i=0;i<s->nb_streams;i++) {
430
            st = s->streams[i];
431
            if (num == st->id)
432
                break;
433
        }
434
        if (i == s->nb_streams) {
435 119cebf4 Michael Niedermayer
skip:
436 bc17df09 Michael Niedermayer
            /* skip packet if unknown number */
437
            url_fskip(pb, len);
438
            rm->remaining_len -= len;
439
            continue;
440
        }
441
        *stream_index= i;
442 115329f1 Diego Biurrun
443 bc17df09 Michael Niedermayer
        return len;
444
    }
445
    return -1;
446
}
447
448 383b123e Kostya Shishkov
static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
449
{
450 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
451 383b123e Kostya Shishkov
    int hdr, seq, pic_num, len2, pos;
452
    int type;
453
454
    hdr = get_byte(pb); len--;
455
    type = hdr >> 6;
456
    switch(type){
457
    case 0: // slice
458
    case 2: // last slice
459
        seq = get_byte(pb); len--;
460
        len2 = get_num(pb, &len);
461
        pos = get_num(pb, &len);
462
        pic_num = get_byte(pb); len--;
463
        rm->remaining_len = len;
464
        break;
465
    case 1: //whole frame
466
        seq = get_byte(pb); len--;
467
        if(av_new_packet(pkt, len + 9) < 0)
468
            return AVERROR(EIO);
469
        pkt->data[0] = 0;
470
        AV_WL32(pkt->data + 1, 1);
471
        AV_WL32(pkt->data + 5, 0);
472
        get_buffer(pb, pkt->data + 9, len);
473
        rm->remaining_len = 0;
474
        return 0;
475
    case 3: //frame as a part of packet
476
        len2 = get_num(pb, &len);
477
        pos = get_num(pb, &len);
478
        pic_num = get_byte(pb); len--;
479
        rm->remaining_len = len - len2;
480
        if(av_new_packet(pkt, len2 + 9) < 0)
481
            return AVERROR(EIO);
482
        pkt->data[0] = 0;
483
        AV_WL32(pkt->data + 1, 1);
484
        AV_WL32(pkt->data + 5, 0);
485
        get_buffer(pb, pkt->data + 9, len2);
486
        return 0;
487
    }
488
    //now we have to deal with single slice
489
490
    if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
491
        rm->slices = ((hdr & 0x3F) << 1) + 1;
492 6887cb8b Roberto Togni
        rm->videobufsize = len2 + 8*rm->slices + 1;
493 2b013568 Roberto Togni
        av_free(rm->videobuf);
494
        if(!(rm->videobuf = av_malloc(rm->videobufsize)))
495 52537534 Roberto Togni
            return AVERROR(ENOMEM);
496 383b123e Kostya Shishkov
        rm->videobufpos = 8*rm->slices + 1;
497
        rm->cur_slice = 0;
498
        rm->curpic_num = pic_num;
499 d447fc31 Kostya Shishkov
        rm->pktpos = url_ftell(pb);
500 383b123e Kostya Shishkov
    }
501 e35033e6 Roberto Togni
    if(type == 2)
502 383b123e Kostya Shishkov
        len = FFMIN(len, pos);
503
504 27a2f87d Roberto Togni
    if(++rm->cur_slice > rm->slices)
505 383b123e Kostya Shishkov
        return 1;
506
    AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
507
    AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
508
    if(rm->videobufpos + len > rm->videobufsize)
509
        return 1;
510
    if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
511
        return AVERROR(EIO);
512 ab19baef Roberto Togni
    rm->videobufpos += len;
513 383b123e Kostya Shishkov
    rm->remaining_len-= len;
514
515
    if(type == 2 || (rm->videobufpos) == rm->videobufsize){
516
         rm->videobuf[0] = rm->cur_slice-1;
517 e11d0145 Roberto Togni
         if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
518 383b123e Kostya Shishkov
             return AVERROR(ENOMEM);
519 e11d0145 Roberto Togni
         memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
520 e35033e6 Roberto Togni
         memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
521
                rm->videobufpos - 1 - 8*rm->slices);
522 d447fc31 Kostya Shishkov
         pkt->pts = AV_NOPTS_VALUE;
523
         pkt->pos = rm->pktpos;
524 383b123e Kostya Shishkov
         return 0;
525
    }
526
527
    return 1;
528
}
529
530 5c470b91 Ronald S. Bultje
static inline void
531
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
532
{
533
    uint8_t *ptr;
534
    int j;
535
536
    if (st->codec->codec_id == CODEC_ID_AC3) {
537
        ptr = pkt->data;
538
        for (j=0;j<pkt->size;j+=2) {
539
            FFSWAP(int, ptr[0], ptr[1]);
540
            ptr += 2;
541
        }
542
    }
543
}
544
545 0fd36362 Ronald S. Bultje
int
546 afd302fa Ronald S. Bultje
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
547
                    int *seq, int *flags, int64_t *timestamp)
548
{
549 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
550 afd302fa Ronald S. Bultje
    RMContext *rm = s->priv_data;
551
552
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
553
        rm->current_stream= st->id;
554
        if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
555
            return -1; //got partial frame
556
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
557
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
558
            (st->codec->codec_id == CODEC_ID_COOK) ||
559
            (st->codec->codec_id == CODEC_ID_ATRAC3)) {
560
            int x;
561
            int sps = rm->sub_packet_size;
562
            int cfs = rm->coded_framesize;
563
            int h = rm->sub_packet_h;
564
            int y = rm->sub_packet_cnt;
565
            int w = rm->audio_framesize;
566
567
            if (*flags & 2)
568
                y = rm->sub_packet_cnt = 0;
569
            if (!y)
570
                rm->audiotimestamp = *timestamp;
571
572
            switch(st->codec->codec_id) {
573
                case CODEC_ID_RA_288:
574
                    for (x = 0; x < h/2; x++)
575
                        get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
576
                    break;
577
                case CODEC_ID_ATRAC3:
578
                case CODEC_ID_COOK:
579
                    for (x = 0; x < w/sps; x++)
580
                        get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
581
                    break;
582
            }
583
584
            if (++(rm->sub_packet_cnt) < h)
585
                return -1;
586
            else {
587
                rm->sub_packet_cnt = 0;
588
                rm->audio_stream_num = st->index;
589
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
590
                // Release first audio packet
591
                av_new_packet(pkt, st->codec->block_align);
592
                memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
593
                *timestamp = rm->audiotimestamp;
594
                *flags = 2; // Mark first packet as keyframe
595
            }
596
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
597
            int x;
598
            rm->audio_stream_num = st->index;
599
            rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
600
            if (rm->sub_packet_cnt) {
601
                for (x = 0; x < rm->sub_packet_cnt; x++)
602
                    rm->sub_packet_lengths[x] = get_be16(pb);
603
                // Release first audio packet
604
                rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
605
                av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
606
                *flags = 2; // Mark first packet as keyframe
607
            }
608 badbe09a Roberto Togni
        } else {
609 afd302fa Ronald S. Bultje
            av_get_packet(pb, pkt, len);
610 e29378ff Roberto Togni
            rm_ac3_swap_bytes(st, pkt);
611 badbe09a Roberto Togni
        }
612 afd302fa Ronald S. Bultje
    } else
613
        av_get_packet(pb, pkt, len);
614
615
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
616
       || st->discard >= AVDISCARD_ALL){
617
        av_free_packet(pkt);
618
        return -1;
619
    }
620
621
    pkt->stream_index = st->index;
622
623
#if 0
624
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
625
        if(st->codec->codec_id == CODEC_ID_RV20){
626
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
627
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
628

629
            seq |= (*timestamp&~0x3FFF);
630
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
631
            if(seq - *timestamp < -0x2000) seq += 0x4000;
632
        }
633
    }
634
#endif
635
636
    pkt->pts= *timestamp;
637
    if (*flags & 2)
638
        pkt->flags |= PKT_FLAG_KEY;
639
640
    return 0;
641
}
642
643 0fd36362 Ronald S. Bultje
void
644 d4d1b5fb Ronald S. Bultje
ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
645
{
646 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
647 d4d1b5fb Ronald S. Bultje
    RMContext *rm = s->priv_data;
648
649
    assert (rm->audio_pkt_cnt > 0);
650
651
    if (st->codec->codec_id == CODEC_ID_AAC)
652
        av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
653
    else {
654
        av_new_packet(pkt, st->codec->block_align);
655
        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
656
               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
657
               st->codec->block_align);
658
    }
659
    rm->audio_pkt_cnt--;
660
    pkt->flags = 0;
661
    pkt->stream_index = st->index;
662
}
663
664 de6d9b64 Fabrice Bellard
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
665
{
666
    RMContext *rm = s->priv_data;
667 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
668 de6d9b64 Fabrice Bellard
    AVStream *st;
669 5c470b91 Ronald S. Bultje
    int i, len;
670 37e85dac Michael Niedermayer
    int64_t timestamp, pos;
671 bc17df09 Michael Niedermayer
    int flags;
672 de6d9b64 Fabrice Bellard
673 c69e7914 Roberto Togni
    if (rm->audio_pkt_cnt) {
674 e0f7e329 Benjamin Larsson
        // If there are queued audio packet return them first
675
        st = s->streams[rm->audio_stream_num];
676 d4d1b5fb Ronald S. Bultje
        ff_rm_retrieve_cache(s, st, pkt);
677 c69e7914 Roberto Togni
    } else if (rm->old_format) {
678
        st = s->streams[0];
679
        if (st->codec->codec_id == CODEC_ID_RA_288) {
680
            int x, y;
681
682
            for (y = 0; y < rm->sub_packet_h; y++)
683
                for (x = 0; x < rm->sub_packet_h/2; x++)
684
                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
685 6f3e0b21 Panagiotis Issaris
                        return AVERROR(EIO);
686 c69e7914 Roberto Togni
            rm->audio_stream_num = 0;
687
            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
688
            // Release first audio packet
689
            av_new_packet(pkt, st->codec->block_align);
690
            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
691
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
692
            pkt->stream_index = 0;
693
        } else {
694
            /* just read raw bytes */
695
            len = RAW_PACKET_SIZE;
696
            len= av_get_packet(pb, pkt, len);
697
            pkt->stream_index = 0;
698
            if (len <= 0) {
699 6f3e0b21 Panagiotis Issaris
                return AVERROR(EIO);
700 c69e7914 Roberto Togni
            }
701
            pkt->size = len;
702
        }
703 e29378ff Roberto Togni
        rm_ac3_swap_bytes(st, pkt);
704 c9510803 Fabrice Bellard
    } else {
705 37e85dac Michael Niedermayer
        int seq=1;
706 b9866ebc Michael Niedermayer
resync:
707 37e85dac Michael Niedermayer
        len=sync(s, &timestamp, &flags, &i, &pos);
708 bc17df09 Michael Niedermayer
        if(len<0)
709 6f3e0b21 Panagiotis Issaris
            return AVERROR(EIO);
710 bc17df09 Michael Niedermayer
        st = s->streams[i];
711
712 afd302fa Ronald S. Bultje
        if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
713 b9866ebc Michael Niedermayer
            goto resync;
714 d880240e Michael Niedermayer
715 9b41eb37 Diego Biurrun
        if((flags&2) && (seq&0x7F) == 1)
716 8f8fae80 Diego Biurrun
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
717 5d6ef63f Philip Gladstone
    }
718
719 de6d9b64 Fabrice Bellard
    return 0;
720
}
721
722
static int rm_read_close(AVFormatContext *s)
723
{
724 e0f7e329 Benjamin Larsson
    RMContext *rm = s->priv_data;
725
726
    av_free(rm->audiobuf);
727 383b123e Kostya Shishkov
    av_free(rm->videobuf);
728 de6d9b64 Fabrice Bellard
    return 0;
729
}
730
731 c9a65ca8 Fabrice Bellard
static int rm_probe(AVProbeData *p)
732
{
733
    /* check file header */
734 c9510803 Fabrice Bellard
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
735
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
736
         p->buf[4] == 0 && p->buf[5] == 0) ||
737
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
738
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
739 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
740
    else
741
        return 0;
742
}
743
744 115329f1 Diego Biurrun
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
745 bc17df09 Michael Niedermayer
                               int64_t *ppos, int64_t pos_limit)
746
{
747
    RMContext *rm = s->priv_data;
748
    int64_t pos, dts;
749 37e85dac Michael Niedermayer
    int stream_index2, flags, len, h;
750 bc17df09 Michael Niedermayer
751
    pos = *ppos;
752 115329f1 Diego Biurrun
753 bc17df09 Michael Niedermayer
    if(rm->old_format)
754
        return AV_NOPTS_VALUE;
755
756 899681cd Björn Axelsson
    url_fseek(s->pb, pos, SEEK_SET);
757 bc17df09 Michael Niedermayer
    rm->remaining_len=0;
758
    for(;;){
759 37e85dac Michael Niedermayer
        int seq=1;
760
        AVStream *st;
761
762
        len=sync(s, &dts, &flags, &stream_index2, &pos);
763 bc17df09 Michael Niedermayer
        if(len<0)
764
            return AV_NOPTS_VALUE;
765 37e85dac Michael Niedermayer
766
        st = s->streams[stream_index2];
767 01f4895c Michael Niedermayer
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
768 899681cd Björn Axelsson
            h= get_byte(s->pb); len--;
769 37e85dac Michael Niedermayer
            if(!(h & 0x40)){
770 899681cd Björn Axelsson
                seq = get_byte(s->pb); len--;
771 bc17df09 Michael Niedermayer
            }
772
        }
773 115329f1 Diego Biurrun
774 37e85dac Michael Niedermayer
        if((flags&2) && (seq&0x7F) == 1){
775 949b1a13 Steve L'Homme
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
776 30a43f2d Michael Niedermayer
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
777 37e85dac Michael Niedermayer
            if(stream_index2 == stream_index)
778
                break;
779
        }
780
781 899681cd Björn Axelsson
        url_fskip(s->pb, len);
782 bc17df09 Michael Niedermayer
    }
783
    *ppos = pos;
784
    return dts;
785
}
786
787 ff70e601 Måns Rullgård
AVInputFormat rm_demuxer = {
788 c9a65ca8 Fabrice Bellard
    "rm",
789 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("RM format"),
790 c9a65ca8 Fabrice Bellard
    sizeof(RMContext),
791
    rm_probe,
792
    rm_read_header,
793
    rm_read_packet,
794
    rm_read_close,
795 bc17df09 Michael Niedermayer
    NULL,
796
    rm_read_dts,
797 c9a65ca8 Fabrice Bellard
};