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ffmpeg / libavformat / rmdec.c @ b973f9ad

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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
#include "avformat.h"
22 7b2a2ce5 Aurelien Jacobs
#include "rm.h"
23 75e61b0e Måns Rullgård
#include "avstring.h"
24 de6d9b64 Fabrice Bellard
25 36cf20f5 Ronald S. Bultje
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
26 de6d9b64 Fabrice Bellard
{
27 36cf20f5 Ronald S. Bultje
    int i;
28 28263f5f Ronald S. Bultje
    char *q, r;
29 de6d9b64 Fabrice Bellard
30
    q = buf;
31
    for(i=0;i<len;i++) {
32 28263f5f Ronald S. Bultje
        r = get_byte(pb);
33 de6d9b64 Fabrice Bellard
        if (i < buf_size - 1)
34 28263f5f Ronald S. Bultje
            *q++ = r;
35 de6d9b64 Fabrice Bellard
    }
36 28263f5f Ronald S. Bultje
    if (buf_size > 0) *q = '\0';
37 de6d9b64 Fabrice Bellard
}
38
39 36cf20f5 Ronald S. Bultje
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
40 de6d9b64 Fabrice Bellard
{
41 36cf20f5 Ronald S. Bultje
    get_strl(pb, buf, buf_size, get_be16(pb));
42
}
43 de6d9b64 Fabrice Bellard
44 36cf20f5 Ronald S. Bultje
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
45
{
46
    get_strl(pb, buf, buf_size, get_byte(pb));
47 de6d9b64 Fabrice Bellard
}
48
49 a9d4a6ef Roberto Togni
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
50 c9510803 Fabrice Bellard
                                      int read_all)
51
{
52 e0f7e329 Benjamin Larsson
    RMContext *rm = s->priv_data;
53 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
54 1e4668d1 Roberto Togni
    char buf[256];
55 c9510803 Fabrice Bellard
    uint32_t version;
56
    int i;
57
58
    /* ra type header */
59
    version = get_be32(pb); /* version */
60
    if (((version >> 16) & 0xff) == 3) {
61 1e4668d1 Roberto Togni
        int64_t startpos = url_ftell(pb);
62 c9510803 Fabrice Bellard
        /* very old version */
63
        for(i = 0; i < 14; i++)
64
            get_byte(pb);
65
        get_str8(pb, s->title, sizeof(s->title));
66
        get_str8(pb, s->author, sizeof(s->author));
67
        get_str8(pb, s->copyright, sizeof(s->copyright));
68
        get_str8(pb, s->comment, sizeof(s->comment));
69 1e4668d1 Roberto Togni
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
70
        // fourcc (should always be "lpcJ")
71 c9510803 Fabrice Bellard
        get_byte(pb);
72
        get_str8(pb, buf, sizeof(buf));
73 1e4668d1 Roberto Togni
        }
74
        // Skip extra header crap (this should never happen)
75
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
76
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
77 01f4895c Michael Niedermayer
        st->codec->sample_rate = 8000;
78
        st->codec->channels = 1;
79
        st->codec->codec_type = CODEC_TYPE_AUDIO;
80
        st->codec->codec_id = CODEC_ID_RA_144;
81 c9510803 Fabrice Bellard
    } else {
82 e0f7e329 Benjamin Larsson
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
83 c9510803 Fabrice Bellard
        /* old version (4) */
84
        get_be32(pb); /* .ra4 */
85 72aef198 Michael Niedermayer
        get_be32(pb); /* data size */
86
        get_be16(pb); /* version2 */
87 c9510803 Fabrice Bellard
        get_be32(pb); /* header size */
88 72aef198 Michael Niedermayer
        flavor= get_be16(pb); /* add codec info / flavor */
89 e0f7e329 Benjamin Larsson
        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
90 c9510803 Fabrice Bellard
        get_be32(pb); /* ??? */
91
        get_be32(pb); /* ??? */
92
        get_be32(pb); /* ??? */
93 115329f1 Diego Biurrun
        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
94 01f4895c Michael Niedermayer
        st->codec->block_align= get_be16(pb); /* frame size */
95 e0f7e329 Benjamin Larsson
        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
96 72aef198 Michael Niedermayer
        get_be16(pb); /* ??? */
97 e0f7e329 Benjamin Larsson
        if (((version >> 16) & 0xff) == 5) {
98
            get_be16(pb); get_be16(pb); get_be16(pb); }
99 01f4895c Michael Niedermayer
        st->codec->sample_rate = get_be16(pb);
100 c9510803 Fabrice Bellard
        get_be32(pb);
101 01f4895c Michael Niedermayer
        st->codec->channels = get_be16(pb);
102 e0f7e329 Benjamin Larsson
        if (((version >> 16) & 0xff) == 5) {
103
            get_be32(pb);
104 bb270c08 Diego Biurrun
            buf[0] = get_byte(pb);
105
            buf[1] = get_byte(pb);
106
            buf[2] = get_byte(pb);
107
            buf[3] = get_byte(pb);
108
            buf[4] = 0;
109
        } else {
110 e344c1ea Steve L'Homme
            get_str8(pb, buf, sizeof(buf)); /* desc */
111
            get_str8(pb, buf, sizeof(buf)); /* desc */
112 bb270c08 Diego Biurrun
        }
113 01f4895c Michael Niedermayer
        st->codec->codec_type = CODEC_TYPE_AUDIO;
114 c9510803 Fabrice Bellard
        if (!strcmp(buf, "dnet")) {
115 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_AC3;
116 bf415121 Justin Ruggles
            st->need_parsing = AVSTREAM_PARSE_FULL;
117 72aef198 Michael Niedermayer
        } else if (!strcmp(buf, "28_8")) {
118 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_RA_288;
119 e0f7e329 Benjamin Larsson
            st->codec->extradata_size= 0;
120
            rm->audio_framesize = st->codec->block_align;
121
            st->codec->block_align = coded_framesize;
122 a443a253 Michael Niedermayer
123
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
124
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
125
                return -1;
126
            }
127
128 e0f7e329 Benjamin Larsson
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
129 10e26bc7 Benjamin Larsson
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
130 e0f7e329 Benjamin Larsson
            int codecdata_length, i;
131
            get_be16(pb); get_byte(pb);
132
            if (((version >> 16) & 0xff) == 5)
133
                get_byte(pb);
134
            codecdata_length = get_be32(pb);
135 a443a253 Michael Niedermayer
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
136
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
137
                return -1;
138
            }
139
140 10e26bc7 Benjamin Larsson
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
141
            else st->codec->codec_id = CODEC_ID_ATRAC3;
142 e0f7e329 Benjamin Larsson
            st->codec->extradata_size= codecdata_length;
143 d76319b1 Jindřich Makovička
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
144 e0f7e329 Benjamin Larsson
            for(i = 0; i < codecdata_length; i++)
145
                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
146
            rm->audio_framesize = st->codec->block_align;
147
            st->codec->block_align = rm->sub_packet_size;
148 a443a253 Michael Niedermayer
149
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
150
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
151
                return -1;
152
            }
153
154 e0f7e329 Benjamin Larsson
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
155 a194f595 Roberto Togni
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
156
            int codecdata_length, i;
157
            get_be16(pb); get_byte(pb);
158
            if (((version >> 16) & 0xff) == 5)
159
                get_byte(pb);
160
            st->codec->codec_id = CODEC_ID_AAC;
161
            codecdata_length = get_be32(pb);
162 a9d4a6ef Roberto Togni
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
163
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
164
                return -1;
165
            }
166 a194f595 Roberto Togni
            if (codecdata_length >= 1) {
167
                st->codec->extradata_size = codecdata_length - 1;
168
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
169
                get_byte(pb);
170
                for(i = 0; i < st->codec->extradata_size; i++)
171
                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
172
            }
173 c9510803 Fabrice Bellard
        } else {
174 01f4895c Michael Niedermayer
            st->codec->codec_id = CODEC_ID_NONE;
175 75e61b0e Måns Rullgård
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
176 c9510803 Fabrice Bellard
        }
177
        if (read_all) {
178
            get_byte(pb);
179
            get_byte(pb);
180
            get_byte(pb);
181 115329f1 Diego Biurrun
182 c9510803 Fabrice Bellard
            get_str8(pb, s->title, sizeof(s->title));
183
            get_str8(pb, s->author, sizeof(s->author));
184
            get_str8(pb, s->copyright, sizeof(s->copyright));
185
            get_str8(pb, s->comment, sizeof(s->comment));
186
        }
187
    }
188 a9d4a6ef Roberto Togni
    return 0;
189 c9510803 Fabrice Bellard
}
190
191 0fd36362 Ronald S. Bultje
int
192 ff1463dc Ronald S. Bultje
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st)
193
{
194 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
195 ff1463dc Ronald S. Bultje
    unsigned int v;
196 36c9e40a Benoit Fouet
    int codec_data_size, size;
197 ff1463dc Ronald S. Bultje
    int64_t codec_pos;
198
199
    codec_data_size = get_be32(pb);
200
    codec_pos = url_ftell(pb);
201
    v = get_be32(pb);
202
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
203
        /* ra type header */
204
        if (rm_read_audio_stream_info(s, st, 0))
205
            return -1;
206
    } else {
207
        int fps, fps2;
208
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
209
        fail1:
210
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
211
            goto skip;
212
        }
213
        st->codec->codec_tag = get_le32(pb);
214
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
215
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
216
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
217
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
218
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
219
            goto fail1;
220
        st->codec->width = get_be16(pb);
221
        st->codec->height = get_be16(pb);
222
        st->codec->time_base.num= 1;
223
        fps= get_be16(pb);
224
        st->codec->codec_type = CODEC_TYPE_VIDEO;
225
        get_be32(pb);
226
        fps2= get_be16(pb);
227
        get_be16(pb);
228
229
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
230
231
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
232
            //check is redundant as get_buffer() will catch this
233
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
234
            return -1;
235
        }
236
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
237
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
238
239
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
240
        st->codec->time_base.den = fps * st->codec->time_base.num;
241
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
242
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
243
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
244
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
245
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
246
        default: goto fail1;
247
        }
248
    }
249
250
skip:
251
    /* skip codec info */
252
    size = url_ftell(pb) - codec_pos;
253
    url_fskip(pb, codec_data_size - size);
254
255 36c9e40a Benoit Fouet
    return 0;
256 ff1463dc Ronald S. Bultje
}
257
258
259 c9510803 Fabrice Bellard
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
260
{
261
    RMContext *rm = s->priv_data;
262
    AVStream *st;
263
264
    rm->old_format = 1;
265
    st = av_new_stream(s, 0);
266
    if (!st)
267 a9d4a6ef Roberto Togni
        return -1;
268
    return rm_read_audio_stream_info(s, st, 1);
269 c9510803 Fabrice Bellard
}
270
271 de6d9b64 Fabrice Bellard
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
272
{
273 c9a65ca8 Fabrice Bellard
    RMContext *rm = s->priv_data;
274 de6d9b64 Fabrice Bellard
    AVStream *st;
275 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
276 ff1463dc Ronald S. Bultje
    unsigned int tag;
277
    int tag_size, i;
278 36c32bdd Diego Biurrun
    unsigned int start_time, duration;
279 de6d9b64 Fabrice Bellard
    char buf[128];
280 5d6ef63f Philip Gladstone
    int flags = 0;
281 de6d9b64 Fabrice Bellard
282 c9510803 Fabrice Bellard
    tag = get_le32(pb);
283
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
284
        /* very old .ra format */
285
        return rm_read_header_old(s, ap);
286
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
287 6f3e0b21 Panagiotis Issaris
        return AVERROR(EIO);
288 c9510803 Fabrice Bellard
    }
289 de6d9b64 Fabrice Bellard
290
    get_be32(pb); /* header size */
291
    get_be16(pb);
292
    get_be32(pb);
293
    get_be32(pb); /* number of headers */
294 115329f1 Diego Biurrun
295 de6d9b64 Fabrice Bellard
    for(;;) {
296
        if (url_feof(pb))
297
            goto fail;
298
        tag = get_le32(pb);
299
        tag_size = get_be32(pb);
300
        get_be16(pb);
301
#if 0
302 115329f1 Diego Biurrun
        printf("tag=%c%c%c%c (%08x) size=%d\n",
303 de6d9b64 Fabrice Bellard
               (tag) & 0xff,
304
               (tag >> 8) & 0xff,
305
               (tag >> 16) & 0xff,
306
               (tag >> 24) & 0xff,
307
               tag,
308
               tag_size);
309
#endif
310 9786bd4d Michael Niedermayer
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
311 de6d9b64 Fabrice Bellard
            goto fail;
312
        switch(tag) {
313
        case MKTAG('P', 'R', 'O', 'P'):
314
            /* file header */
315
            get_be32(pb); /* max bit rate */
316
            get_be32(pb); /* avg bit rate */
317
            get_be32(pb); /* max packet size */
318
            get_be32(pb); /* avg packet size */
319
            get_be32(pb); /* nb packets */
320
            get_be32(pb); /* duration */
321
            get_be32(pb); /* preroll */
322
            get_be32(pb); /* index offset */
323
            get_be32(pb); /* data offset */
324
            get_be16(pb); /* nb streams */
325 5d6ef63f Philip Gladstone
            flags = get_be16(pb); /* flags */
326 de6d9b64 Fabrice Bellard
            break;
327
        case MKTAG('C', 'O', 'N', 'T'):
328 36cf20f5 Ronald S. Bultje
            get_str16(pb, s->title, sizeof(s->title));
329
            get_str16(pb, s->author, sizeof(s->author));
330
            get_str16(pb, s->copyright, sizeof(s->copyright));
331
            get_str16(pb, s->comment, sizeof(s->comment));
332 de6d9b64 Fabrice Bellard
            break;
333
        case MKTAG('M', 'D', 'P', 'R'):
334 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
335 de6d9b64 Fabrice Bellard
            if (!st)
336
                goto fail;
337
            st->id = get_be16(pb);
338
            get_be32(pb); /* max bit rate */
339 01f4895c Michael Niedermayer
            st->codec->bit_rate = get_be32(pb); /* bit rate */
340 de6d9b64 Fabrice Bellard
            get_be32(pb); /* max packet size */
341
            get_be32(pb); /* avg packet size */
342 247eadca Fabrice Bellard
            start_time = get_be32(pb); /* start time */
343 de6d9b64 Fabrice Bellard
            get_be32(pb); /* preroll */
344 247eadca Fabrice Bellard
            duration = get_be32(pb); /* duration */
345 c0df9d75 Michael Niedermayer
            st->start_time = start_time;
346
            st->duration = duration;
347 de6d9b64 Fabrice Bellard
            get_str8(pb, buf, sizeof(buf)); /* desc */
348
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
349 01f4895c Michael Niedermayer
            st->codec->codec_type = CODEC_TYPE_DATA;
350 d880240e Michael Niedermayer
            av_set_pts_info(st, 64, 1, 1000);
351 ff1463dc Ronald S. Bultje
            if (ff_rm_read_mdpr_codecdata(s, st) < 0)
352
                return -1;
353 de6d9b64 Fabrice Bellard
            break;
354
        case MKTAG('D', 'A', 'T', 'A'):
355
            goto header_end;
356
        default:
357
            /* unknown tag: skip it */
358
            url_fskip(pb, tag_size - 10);
359
            break;
360
        }
361
    }
362
 header_end:
363
    rm->nb_packets = get_be32(pb); /* number of packets */
364 5d6ef63f Philip Gladstone
    if (!rm->nb_packets && (flags & 4))
365
        rm->nb_packets = 3600 * 25;
366 de6d9b64 Fabrice Bellard
    get_be32(pb); /* next data header */
367 383b123e Kostya Shishkov
    rm->curpic_num = -1;
368 de6d9b64 Fabrice Bellard
    return 0;
369
370
 fail:
371
    for(i=0;i<s->nb_streams;i++) {
372 1ea4f593 Fabrice Bellard
        av_free(s->streams[i]);
373 de6d9b64 Fabrice Bellard
    }
374 6f3e0b21 Panagiotis Issaris
    return AVERROR(EIO);
375 de6d9b64 Fabrice Bellard
}
376
377 4c2bc159 Michael Niedermayer
static int get_num(ByteIOContext *pb, int *len)
378
{
379
    int n, n1;
380
381
    n = get_be16(pb);
382
    (*len)-=2;
383 e3052ce7 Roberto Togni
    n &= 0x7FFF;
384 4c2bc159 Michael Niedermayer
    if (n >= 0x4000) {
385
        return n - 0x4000;
386
    } else {
387
        n1 = get_be16(pb);
388
        (*len)-=2;
389
        return (n << 16) | n1;
390
    }
391
}
392
393 c9510803 Fabrice Bellard
/* multiple of 20 bytes for ra144 (ugly) */
394
#define RAW_PACKET_SIZE 1000
395
396 37e85dac Michael Niedermayer
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
397 bc17df09 Michael Niedermayer
    RMContext *rm = s->priv_data;
398 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
399 bc17df09 Michael Niedermayer
    int len, num, res, i;
400
    AVStream *st;
401 119cebf4 Michael Niedermayer
    uint32_t state=0xFFFFFFFF;
402 bc17df09 Michael Niedermayer
403
    while(!url_feof(pb)){
404 37e85dac Michael Niedermayer
        *pos= url_ftell(pb);
405 bc17df09 Michael Niedermayer
        if(rm->remaining_len > 0){
406
            num= rm->current_stream;
407
            len= rm->remaining_len;
408
            *timestamp = AV_NOPTS_VALUE;
409
            *flags= 0;
410
        }else{
411 119cebf4 Michael Niedermayer
            state= (state<<8) + get_byte(pb);
412 115329f1 Diego Biurrun
413 119cebf4 Michael Niedermayer
            if(state == MKBETAG('I', 'N', 'D', 'X')){
414
                len = get_be16(pb) - 6;
415
                if(len<0)
416
                    continue;
417
                goto skip;
418
            }
419 115329f1 Diego Biurrun
420 119cebf4 Michael Niedermayer
            if(state > (unsigned)0xFFFF || state < 12)
421 bc17df09 Michael Niedermayer
                continue;
422 119cebf4 Michael Niedermayer
            len=state;
423
            state= 0xFFFFFFFF;
424
425 bc17df09 Michael Niedermayer
            num = get_be16(pb);
426
            *timestamp = get_be32(pb);
427
            res= get_byte(pb); /* reserved */
428
            *flags = get_byte(pb); /* flags */
429 37e85dac Michael Niedermayer
430 115329f1 Diego Biurrun
431 bc17df09 Michael Niedermayer
            len -= 12;
432
        }
433
        for(i=0;i<s->nb_streams;i++) {
434
            st = s->streams[i];
435
            if (num == st->id)
436
                break;
437
        }
438
        if (i == s->nb_streams) {
439 119cebf4 Michael Niedermayer
skip:
440 bc17df09 Michael Niedermayer
            /* skip packet if unknown number */
441
            url_fskip(pb, len);
442
            rm->remaining_len -= len;
443
            continue;
444
        }
445
        *stream_index= i;
446 115329f1 Diego Biurrun
447 bc17df09 Michael Niedermayer
        return len;
448
    }
449
    return -1;
450
}
451
452 383b123e Kostya Shishkov
static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
453
{
454 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
455 383b123e Kostya Shishkov
    int hdr, seq, pic_num, len2, pos;
456
    int type;
457
458
    hdr = get_byte(pb); len--;
459
    type = hdr >> 6;
460
    switch(type){
461
    case 0: // slice
462
    case 2: // last slice
463
        seq = get_byte(pb); len--;
464
        len2 = get_num(pb, &len);
465
        pos = get_num(pb, &len);
466
        pic_num = get_byte(pb); len--;
467
        rm->remaining_len = len;
468
        break;
469
    case 1: //whole frame
470
        seq = get_byte(pb); len--;
471
        if(av_new_packet(pkt, len + 9) < 0)
472
            return AVERROR(EIO);
473
        pkt->data[0] = 0;
474
        AV_WL32(pkt->data + 1, 1);
475
        AV_WL32(pkt->data + 5, 0);
476
        get_buffer(pb, pkt->data + 9, len);
477
        rm->remaining_len = 0;
478
        return 0;
479
    case 3: //frame as a part of packet
480
        len2 = get_num(pb, &len);
481
        pos = get_num(pb, &len);
482
        pic_num = get_byte(pb); len--;
483
        rm->remaining_len = len - len2;
484
        if(av_new_packet(pkt, len2 + 9) < 0)
485
            return AVERROR(EIO);
486
        pkt->data[0] = 0;
487
        AV_WL32(pkt->data + 1, 1);
488
        AV_WL32(pkt->data + 5, 0);
489
        get_buffer(pb, pkt->data + 9, len2);
490
        return 0;
491
    }
492
    //now we have to deal with single slice
493
494
    if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
495
        rm->slices = ((hdr & 0x3F) << 1) + 1;
496 6887cb8b Roberto Togni
        rm->videobufsize = len2 + 8*rm->slices + 1;
497 2b013568 Roberto Togni
        av_free(rm->videobuf);
498
        if(!(rm->videobuf = av_malloc(rm->videobufsize)))
499 52537534 Roberto Togni
            return AVERROR(ENOMEM);
500 383b123e Kostya Shishkov
        rm->videobufpos = 8*rm->slices + 1;
501
        rm->cur_slice = 0;
502
        rm->curpic_num = pic_num;
503 d447fc31 Kostya Shishkov
        rm->pktpos = url_ftell(pb);
504 383b123e Kostya Shishkov
    }
505 e35033e6 Roberto Togni
    if(type == 2)
506 383b123e Kostya Shishkov
        len = FFMIN(len, pos);
507
508 27a2f87d Roberto Togni
    if(++rm->cur_slice > rm->slices)
509 383b123e Kostya Shishkov
        return 1;
510
    AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
511
    AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
512
    if(rm->videobufpos + len > rm->videobufsize)
513
        return 1;
514
    if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
515
        return AVERROR(EIO);
516 ab19baef Roberto Togni
    rm->videobufpos += len;
517 383b123e Kostya Shishkov
    rm->remaining_len-= len;
518
519
    if(type == 2 || (rm->videobufpos) == rm->videobufsize){
520
         rm->videobuf[0] = rm->cur_slice-1;
521 e11d0145 Roberto Togni
         if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
522 383b123e Kostya Shishkov
             return AVERROR(ENOMEM);
523 e11d0145 Roberto Togni
         memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
524 e35033e6 Roberto Togni
         memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
525
                rm->videobufpos - 1 - 8*rm->slices);
526 d447fc31 Kostya Shishkov
         pkt->pts = AV_NOPTS_VALUE;
527
         pkt->pos = rm->pktpos;
528 383b123e Kostya Shishkov
         return 0;
529
    }
530
531
    return 1;
532
}
533
534 5c470b91 Ronald S. Bultje
static inline void
535
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
536
{
537
    uint8_t *ptr;
538
    int j;
539
540
    if (st->codec->codec_id == CODEC_ID_AC3) {
541
        ptr = pkt->data;
542
        for (j=0;j<pkt->size;j+=2) {
543
            FFSWAP(int, ptr[0], ptr[1]);
544
            ptr += 2;
545
        }
546
    }
547
}
548
549 0fd36362 Ronald S. Bultje
int
550 afd302fa Ronald S. Bultje
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
551
                    int *seq, int *flags, int64_t *timestamp)
552
{
553 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
554 afd302fa Ronald S. Bultje
    RMContext *rm = s->priv_data;
555
556
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
557
        rm->current_stream= st->id;
558
        if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
559
            return -1; //got partial frame
560
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
561
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
562
            (st->codec->codec_id == CODEC_ID_COOK) ||
563
            (st->codec->codec_id == CODEC_ID_ATRAC3)) {
564
            int x;
565
            int sps = rm->sub_packet_size;
566
            int cfs = rm->coded_framesize;
567
            int h = rm->sub_packet_h;
568
            int y = rm->sub_packet_cnt;
569
            int w = rm->audio_framesize;
570
571
            if (*flags & 2)
572
                y = rm->sub_packet_cnt = 0;
573
            if (!y)
574
                rm->audiotimestamp = *timestamp;
575
576
            switch(st->codec->codec_id) {
577
                case CODEC_ID_RA_288:
578
                    for (x = 0; x < h/2; x++)
579
                        get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
580
                    break;
581
                case CODEC_ID_ATRAC3:
582
                case CODEC_ID_COOK:
583
                    for (x = 0; x < w/sps; x++)
584
                        get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
585
                    break;
586
            }
587
588
            if (++(rm->sub_packet_cnt) < h)
589
                return -1;
590
            else {
591
                rm->sub_packet_cnt = 0;
592
                rm->audio_stream_num = st->index;
593
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
594
                // Release first audio packet
595
                av_new_packet(pkt, st->codec->block_align);
596
                memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
597
                *timestamp = rm->audiotimestamp;
598
                *flags = 2; // Mark first packet as keyframe
599
            }
600
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
601
            int x;
602
            rm->audio_stream_num = st->index;
603
            rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
604
            if (rm->sub_packet_cnt) {
605
                for (x = 0; x < rm->sub_packet_cnt; x++)
606
                    rm->sub_packet_lengths[x] = get_be16(pb);
607
                // Release first audio packet
608
                rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
609
                av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
610
                *flags = 2; // Mark first packet as keyframe
611
            }
612
        } else
613
            av_get_packet(pb, pkt, len);
614 e29378ff Roberto Togni
            rm_ac3_swap_bytes(st, pkt);
615 afd302fa Ronald S. Bultje
616
    } else
617
        av_get_packet(pb, pkt, len);
618
619
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
620
       || st->discard >= AVDISCARD_ALL){
621
        av_free_packet(pkt);
622
        return -1;
623
    }
624
625
    pkt->stream_index = st->index;
626
627
#if 0
628
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
629
        if(st->codec->codec_id == CODEC_ID_RV20){
630
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
631
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
632

633
            seq |= (*timestamp&~0x3FFF);
634
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
635
            if(seq - *timestamp < -0x2000) seq += 0x4000;
636
        }
637
    }
638
#endif
639
640
    pkt->pts= *timestamp;
641
    if (*flags & 2)
642
        pkt->flags |= PKT_FLAG_KEY;
643
644
    return 0;
645
}
646
647 0fd36362 Ronald S. Bultje
void
648 d4d1b5fb Ronald S. Bultje
ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
649
{
650 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
651 d4d1b5fb Ronald S. Bultje
    RMContext *rm = s->priv_data;
652
653
    assert (rm->audio_pkt_cnt > 0);
654
655
    if (st->codec->codec_id == CODEC_ID_AAC)
656
        av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
657
    else {
658
        av_new_packet(pkt, st->codec->block_align);
659
        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
660
               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
661
               st->codec->block_align);
662
    }
663
    rm->audio_pkt_cnt--;
664
    pkt->flags = 0;
665
    pkt->stream_index = st->index;
666
}
667
668 de6d9b64 Fabrice Bellard
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
669
{
670
    RMContext *rm = s->priv_data;
671 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
672 de6d9b64 Fabrice Bellard
    AVStream *st;
673 5c470b91 Ronald S. Bultje
    int i, len;
674 37e85dac Michael Niedermayer
    int64_t timestamp, pos;
675 bc17df09 Michael Niedermayer
    int flags;
676 de6d9b64 Fabrice Bellard
677 c69e7914 Roberto Togni
    if (rm->audio_pkt_cnt) {
678 e0f7e329 Benjamin Larsson
        // If there are queued audio packet return them first
679
        st = s->streams[rm->audio_stream_num];
680 d4d1b5fb Ronald S. Bultje
        ff_rm_retrieve_cache(s, st, pkt);
681 c69e7914 Roberto Togni
    } else if (rm->old_format) {
682
        st = s->streams[0];
683
        if (st->codec->codec_id == CODEC_ID_RA_288) {
684
            int x, y;
685
686
            for (y = 0; y < rm->sub_packet_h; y++)
687
                for (x = 0; x < rm->sub_packet_h/2; x++)
688
                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
689 6f3e0b21 Panagiotis Issaris
                        return AVERROR(EIO);
690 c69e7914 Roberto Togni
            rm->audio_stream_num = 0;
691
            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
692
            // Release first audio packet
693
            av_new_packet(pkt, st->codec->block_align);
694
            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
695
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
696
            pkt->stream_index = 0;
697
        } else {
698
            /* just read raw bytes */
699
            len = RAW_PACKET_SIZE;
700
            len= av_get_packet(pb, pkt, len);
701
            pkt->stream_index = 0;
702
            if (len <= 0) {
703 6f3e0b21 Panagiotis Issaris
                return AVERROR(EIO);
704 c69e7914 Roberto Togni
            }
705
            pkt->size = len;
706
        }
707 e29378ff Roberto Togni
        rm_ac3_swap_bytes(st, pkt);
708 c9510803 Fabrice Bellard
    } else {
709 37e85dac Michael Niedermayer
        int seq=1;
710 b9866ebc Michael Niedermayer
resync:
711 37e85dac Michael Niedermayer
        len=sync(s, &timestamp, &flags, &i, &pos);
712 bc17df09 Michael Niedermayer
        if(len<0)
713 6f3e0b21 Panagiotis Issaris
            return AVERROR(EIO);
714 bc17df09 Michael Niedermayer
        st = s->streams[i];
715
716 afd302fa Ronald S. Bultje
        if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
717 b9866ebc Michael Niedermayer
            goto resync;
718 d880240e Michael Niedermayer
719 c807e68f Diego Biurrun
        if( (flags&2) && (seq&0x7F) == 1 )
720 8f8fae80 Diego Biurrun
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
721 5d6ef63f Philip Gladstone
    }
722
723 de6d9b64 Fabrice Bellard
    return 0;
724
}
725
726
static int rm_read_close(AVFormatContext *s)
727
{
728 e0f7e329 Benjamin Larsson
    RMContext *rm = s->priv_data;
729
730
    av_free(rm->audiobuf);
731 383b123e Kostya Shishkov
    av_free(rm->videobuf);
732 de6d9b64 Fabrice Bellard
    return 0;
733
}
734
735 c9a65ca8 Fabrice Bellard
static int rm_probe(AVProbeData *p)
736
{
737
    /* check file header */
738 c9510803 Fabrice Bellard
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
739
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
740
         p->buf[4] == 0 && p->buf[5] == 0) ||
741
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
742
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
743 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
744
    else
745
        return 0;
746
}
747
748 115329f1 Diego Biurrun
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
749 bc17df09 Michael Niedermayer
                               int64_t *ppos, int64_t pos_limit)
750
{
751
    RMContext *rm = s->priv_data;
752
    int64_t pos, dts;
753 37e85dac Michael Niedermayer
    int stream_index2, flags, len, h;
754 bc17df09 Michael Niedermayer
755
    pos = *ppos;
756 115329f1 Diego Biurrun
757 bc17df09 Michael Niedermayer
    if(rm->old_format)
758
        return AV_NOPTS_VALUE;
759
760 899681cd Björn Axelsson
    url_fseek(s->pb, pos, SEEK_SET);
761 bc17df09 Michael Niedermayer
    rm->remaining_len=0;
762
    for(;;){
763 37e85dac Michael Niedermayer
        int seq=1;
764
        AVStream *st;
765
766
        len=sync(s, &dts, &flags, &stream_index2, &pos);
767 bc17df09 Michael Niedermayer
        if(len<0)
768
            return AV_NOPTS_VALUE;
769 37e85dac Michael Niedermayer
770
        st = s->streams[stream_index2];
771 01f4895c Michael Niedermayer
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
772 899681cd Björn Axelsson
            h= get_byte(s->pb); len--;
773 37e85dac Michael Niedermayer
            if(!(h & 0x40)){
774 899681cd Björn Axelsson
                seq = get_byte(s->pb); len--;
775 bc17df09 Michael Niedermayer
            }
776
        }
777 115329f1 Diego Biurrun
778 37e85dac Michael Niedermayer
        if((flags&2) && (seq&0x7F) == 1){
779 949b1a13 Steve L'Homme
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
780 30a43f2d Michael Niedermayer
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
781 37e85dac Michael Niedermayer
            if(stream_index2 == stream_index)
782
                break;
783
        }
784
785 899681cd Björn Axelsson
        url_fskip(s->pb, len);
786 bc17df09 Michael Niedermayer
    }
787
    *ppos = pos;
788
    return dts;
789
}
790
791 ff70e601 Måns Rullgård
AVInputFormat rm_demuxer = {
792 c9a65ca8 Fabrice Bellard
    "rm",
793
    "rm format",
794
    sizeof(RMContext),
795
    rm_probe,
796
    rm_read_header,
797
    rm_read_packet,
798
    rm_read_close,
799 bc17df09 Michael Niedermayer
    NULL,
800
    rm_read_dts,
801 c9a65ca8 Fabrice Bellard
};