Revision 27d5f18f

View differences:

libavformat/Makefile
16 16
      avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
17 17
      yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o \
18 18
      nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
19
      sierravmd.o matroska.o sol.o electronicarts.o
19
      sierravmd.o matroska.o sol.o electronicarts.o nsvdec.o
20 20

  
21 21
ifeq ($(CONFIG_RISKY),yes)
22 22
OBJS+= asf.o
......
83 83
SLIB= $(SLIBPREF)avformat$(SLIBSUF)
84 84
endif
85 85

  
86
EXTRALIBS+=-lavcodec -L../libavcodec
87
ifeq ($(CONFIG_MP3LAME),yes)
88
EXTRALIBS+=-lmp3lame
89
endif
90

  
86 91
SRCS := $(OBJS:.o=.c) $(PPOBJS:.o=.cpp)
87 92

  
88 93
all: $(LIB) $(SLIB)
libavformat/allformats.c
110 110
    matroska_init();
111 111
    sol_init();
112 112
    ea_init();
113
    nsvdec_init();
113 114

  
114 115
#ifdef CONFIG_ENCODERS
115 116
    /* image formats */
libavformat/avformat.h
510 510
/* electronicarts.c */
511 511
int ea_init(void);
512 512

  
513
/* nsvdec.c */
514
int nsvdec_init(void);
515

  
513 516
#include "rtp.h"
514 517

  
515 518
#include "rtsp.h"
libavformat/nsvdec.c
1
/*
2
 * NSV decoder.
3
 * Copyright (c) 2004 The FFmpeg Project.
4
 *
5
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9
 *
10
 * This library is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18
 */
19
#include "avformat.h"
20
#include "avi.h"
21

  
22
#define DEBUG
23
//#define DEBUG_DUMP_INDEX // XXX dumbdriving-271.nsv breaks with it commented!!
24
//#define DEBUG_SEEK
25
#define CHECK_SUBSEQUENT_NSVS
26
//#define DISABLE_AUDIO
27

  
28
/* max bytes to crawl for trying to resync
29
 * stupid streaming servers don't start at chunk boundaries...
30
 */
31
#define NSV_MAX_RESYNC (500*1024)
32
#define NSV_MAX_RESYNC_TRIES 300
33

  
34
/*
35
 * First version by Francois Revol - revol@free.fr
36
 * References:
37
 * (1) http://www.multimedia.cx/nsv-format.txt
38
 * seems someone came to the same conclusions as me, and updated it:
39
 * (2) http://www.stud.ktu.lt/~vitslav/nsv/nsv-format.txt
40
 *     http://www.stud.ktu.lt/~vitslav/nsv/
41
 * Sample files:
42
 * (S1) http://www.nullsoft.com/nsv/samples/
43
 * http://www.nullsoft.com/nsv/samples/faster.nsv
44
 * http://streamripper.sourceforge.net/openbb/read.php?TID=492&page=4
45
 */
46

  
47
/*
48
 * notes on the header (Francois Revol):
49
 * 
50
 * It is followed by strings, then a table, but nothing tells 
51
 * where the table begins according to (1). After checking faster.nsv,
52
 * I believe NVSf[16-19] gives the size of the strings data
53
 * (that is the offset of the data table after the header).
54
 * After checking all samples from (S1) all confirms this.
55
 *
56
 * Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC,
57
 * I noticed there was about 1 NVSs chunk/s, so I ran
58
 * strings faster.nsv | grep NSVs | wc -l
59
 * which gave me 180. That leads me to think that NSVf[12-15] might be the 
60
 * file length in milliseconds.
61
 * Let's try that:
62
 * for f in *.nsv; do HTIME="$(od -t x4 "$f" | head -1 | sed 's/.* //')"; echo "'$f' $((0x$HTIME))s = $((0x$HTIME/1000/60)):$((0x$HTIME/1000%60))"; done
63
 * except for nstrailer (which doesn't have an NSVf header), it repports correct time.
64
 *
65
 * nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks, 
66
 * so the header seems to not be mandatory. (for streaming).
67
 * 
68
 * index slice duration check (excepts nsvtrailer.nsv):
69
 * for f in [^n]*.nsv; do DUR="$(ffmpeg -i "$f" 2>/dev/null | grep 'NSVf duration' | cut -d ' ' -f 4)"; IC="$(ffmpeg -i "$f" 2>/dev/null | grep 'INDEX ENTRIES' | cut -d ' ' -f 2)"; echo "duration $DUR, slite time $(($DUR/$IC))"; done
70
 */
71

  
72
/*
73
 * TODO:
74
 * - handle timestamps !!!
75
 * - use index
76
 * - mime-type in probe()
77
 * - seek
78
 */
79

  
80
#ifdef DEBUG
81
#define PRINT(_v) printf _v
82
#else
83
#define PRINT(_v) 
84
#endif
85

  
86
#if 0
87
struct NSVf_header {
88
    uint32_t chunk_tag; /* 'NSVf' */
89
    uint32_t chunk_size;
90
    uint32_t file_size; /* max 4GB ??? noone learns anything it seems :^) */
91
    uint32_t file_length; //unknown1;  /* what about MSB of file_size ? */
92
    uint32_t info_strings_size; /* size of the info strings */ //unknown2;
93
    uint32_t table_entries;
94
    uint32_t table_entries_used; /* the left ones should be -1 */
95
};
96

  
97
struct NSVs_header {
98
    uint32_t chunk_tag; /* 'NSVs' */
99
    uint32_t v4cc;      /* or 'NONE' */
100
    uint32_t a4cc;      /* or 'NONE' */
101
    uint16_t vwidth;    /* assert(vwidth%16==0) */
102
    uint16_t vheight;   /* assert(vheight%16==0) */
103
    uint8_t framerate;  /* value = (framerate&0x80)?frtable[frameratex0x7f]:framerate */
104
    uint16_t unknown;
105
};
106

  
107
struct nsv_avchunk_header {
108
    uint8_t vchunk_size_lsb;
109
    uint16_t vchunk_size_msb; /* value = (vchunk_size_msb << 4) | (vchunk_size_lsb >> 4) */
110
    uint16_t achunk_size;
111
};
112

  
113
struct nsv_pcm_header {
114
    uint8_t bits_per_sample;
115
    uint8_t channel_count;
116
    uint16_t sample_rate;
117
};
118
#endif
119

  
120
/* variation from avi.h */
121
/*typedef struct CodecTag {
122
    int id;
123
    unsigned int tag;
124
} CodecTag;*/
125

  
126
/* tags */
127

  
128
#define T_NSVF MKTAG('N', 'S', 'V', 'f') /* file header */
129
#define T_NSVS MKTAG('N', 'S', 'V', 's') /* chunk header */
130
#define T_TOC2 MKTAG('T', 'O', 'C', '2') /* extra index marker */
131
#define T_NONE MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */
132
#define T_SUBT MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */
133
#define T_ASYN MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */
134
#define T_KEYF MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */
135

  
136
#define TB_NSVF MKBETAG('N', 'S', 'V', 'f')
137
#define TB_NSVS MKBETAG('N', 'S', 'V', 's')
138

  
139
/* hardcoded stream indices */
140
#define NSV_ST_VIDEO 0
141
#define NSV_ST_AUDIO 1
142
#define NSV_ST_SUBT 2
143

  
144
enum NSVStatus {
145
    NSV_UNSYNC,
146
    NSV_FOUND_NSVF,
147
    NSV_HAS_READ_NSVF,
148
    NSV_FOUND_NSVS,
149
    NSV_HAS_READ_NSVS,
150
    NSV_FOUND_BEEF,
151
    NSV_GOT_VIDEO,
152
    NSV_GOT_AUDIO,
153
};
154

  
155
typedef struct NSVStream {
156
    int frame_offset; /* current frame (video) or byte (audio) counter
157
                         (used to compute the pts) */
158
    int scale;
159
    int rate;    
160
    int sample_size; /* audio only data */
161
    int start;
162
    
163
    int new_frame_offset; /* temporary storage (used during seek) */
164
    int cum_len; /* temporary storage (used during seek) */
165
} NSVStream;
166

  
167
typedef struct {
168
    int  base_offset;
169
    int  NSVf_end;
170
    uint32_t *nsvf_index_data;
171
    int index_entries;
172
    enum NSVStatus state;
173
    AVPacket ahead[2]; /* [v, a] if .data is !NULL there is something */
174
    /* cached */
175
    int64_t duration;
176
    uint32_t vtag, atag;
177
    uint16_t vwidth, vheight;
178
    //DVDemuxContext* dv_demux;
179
} NSVContext;
180

  
181
static const CodecTag nsv_codec_video_tags[] = {
182
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') },
183
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
184
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
185
/*
186
    { CODEC_ID_VP4, MKTAG('V', 'P', '4', ' ') },
187
    { CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') },
188
    { CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') },
189
    { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
190
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') },
191
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
192
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
193
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
194
*/
195
    { CODEC_ID_XVID, MKTAG('X', 'V', 'I', 'D') }, /* cf sample xvid decoder from nsv_codec_sdk.zip */
196
    { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') },
197
    { 0, 0 },
198
};
199

  
200
static const CodecTag nsv_codec_audio_tags[] = {
201
    { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
202
    { CODEC_ID_AAC, MKTAG('A', 'A', 'C', ' ') },
203
    { CODEC_ID_AAC, MKTAG('A', 'A', 'C', 'P') }, /* _CUTTED__MUXED_2 Heads - Out Of The City.nsv */
204
    { CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') },
205
    { 0, 0 },
206
};
207

  
208
static const uint64_t nsv_framerate_table[] = {
209
    ((uint64_t)AV_TIME_BASE * 30),
210
    ((uint64_t)AV_TIME_BASE * 30000 / 1001), /* 29.97 */
211
    ((uint64_t)AV_TIME_BASE * 25),
212
    ((uint64_t)AV_TIME_BASE * 24000 / 1001), /* 23.98 */
213
    ((uint64_t)AV_TIME_BASE * 30), /* ?? */
214
    ((uint64_t)AV_TIME_BASE * 15000 / 1001), /* 14.98 */
215
};
216

  
217
//static int nsv_load_index(AVFormatContext *s);
218
static int nsv_read_chunk(AVFormatContext *s, int fill_header);
219

  
220
#ifdef DEBUG
221
static void print_tag(const char *str, unsigned int tag, int size)
222
{
223
    printf("%s: tag=%c%c%c%c\n",
224
           str, tag & 0xff,
225
           (tag >> 8) & 0xff,
226
           (tag >> 16) & 0xff,
227
           (tag >> 24) & 0xff);
228
}
229
#endif
230

  
231
/* try to find something we recognize, and set the state accordingly */
232
static int nsv_resync(AVFormatContext *s)
233
{
234
    NSVContext *nsv = s->priv_data;
235
    ByteIOContext *pb = &s->pb;
236
    uint32 v = 0;
237
    int i;
238
    
239
    PRINT(("%s(), offset = %Ld, state = %d\n", __FUNCTION__, url_ftell(pb), nsv->state));
240
    
241
    //nsv->state = NSV_UNSYNC;
242
    
243
    for (i = 0; i < NSV_MAX_RESYNC; i++) {
244
        if (url_feof(pb)) {
245
            PRINT(("NSV EOF\n"));
246
            nsv->state = NSV_UNSYNC;
247
            return -1;
248
        }
249
        v <<= 8;
250
        v |= get_byte(pb);
251
/*
252
        if (i < 8) {
253
            PRINT(("NSV resync: [%d] = %02x\n", i, v & 0x0FF));
254
        }
255
*/
256
        
257
        if ((v & 0x0000ffff) == 0xefbe) { /* BEEF */
258
            PRINT(("NSV resynced on BEEF after %d bytes\n", i+1));
259
            nsv->state = NSV_FOUND_BEEF;
260
            return 0;
261
        }
262
        /* we read as big endian, thus the MK*BE* */
263
        if (v == TB_NSVF) { /* NSVf */
264
            PRINT(("NSV resynced on NSVf after %d bytes\n", i+1));
265
            nsv->state = NSV_FOUND_NSVF;
266
            return 0;
267
        }
268
        if (v == MKBETAG('N', 'S', 'V', 's')) { /* NSVs */
269
            PRINT(("NSV resynced on NSVs after %d bytes\n", i+1));
270
            nsv->state = NSV_FOUND_NSVS;
271
            return 0;
272
        }
273
        
274
    }
275
    PRINT(("NSV sync lost\n"));
276
    return -1;
277
}
278

  
279
static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap)
280
{
281
    NSVContext *nsv = s->priv_data;
282
    ByteIOContext *pb = &s->pb;
283
    uint32_t tag, tag1, handler;
284
    int codec_type, stream_index, frame_period, bit_rate, scale, rate;
285
    unsigned int file_size, size, nb_frames;
286
    int64_t duration;
287
    int strings_size;
288
    int table_entries;
289
    int table_entries_used;
290
    int i, n;
291
    AVStream *st;
292
    NSVStream *ast;
293

  
294
    PRINT(("%s()\n", __FUNCTION__));
295

  
296
    nsv->state = NSV_UNSYNC; /* in case we fail */
297
    
298
    size = get_le32(pb);
299
    if (size < 28)
300
        return -1;
301
    nsv->NSVf_end = size;
302

  
303
    //s->file_size = (uint32_t)get_le32(pb);
304
    file_size = (uint32_t)get_le32(pb);
305
    PRINT(("NSV NSVf chunk_size %ld\n", size));
306
    PRINT(("NSV NSVf file_size %Ld\n", file_size));
307

  
308
    duration = get_le32(pb); /* in ms */
309
    nsv->duration = duration * AV_TIME_BASE / 1000; /* convert */
310
    PRINT(("NSV NSVf duration %Ld ms\n", duration));
311
    // XXX: store it in AVStreams
312

  
313
    strings_size = get_le32(pb);
314
    table_entries = get_le32(pb);
315
    table_entries_used = get_le32(pb);
316
    PRINT(("NSV NSVf info-strings size: %d, table entries: %d, bis %d\n", 
317
            strings_size, table_entries, table_entries_used));
318
    if (url_feof(pb))
319
        return -1;
320
    
321
    PRINT(("NSV got header; filepos %Ld\n", url_ftell(pb)));
322

  
323
    if (strings_size > 0) {
324
        char *strings; /* last byte will be '\0' to play safe with str*() */
325
        char *p, *endp;
326
        char *token, *value;
327
        char quote;
328

  
329
        p = strings = av_mallocz(strings_size + 1);
330
        endp = strings + strings_size;
331
        get_buffer(pb, strings, strings_size);
332
        while (p < endp) {
333
            while (*p == ' ')
334
                p++; /* strip out spaces */
335
            if (p >= endp-2)
336
                break;
337
            token = p;
338
            p = strchr(p, '=');
339
            if (!p || p >= endp-2)
340
                break;
341
            *p++ = '\0';
342
            quote = *p++;
343
            value = p;
344
            p = strchr(p, quote);
345
            if (!p || p >= endp)
346
                break;
347
            *p++ = '\0';
348
            PRINT(("NSV NSVf INFO: %s='%s'\n", token, value));
349
            if (!strcmp(token, "ASPECT")) {
350
                /* don't care */
351
            } else if (!strcmp(token, "CREATOR") || !strcmp(token, "Author")) {
352
                strncpy(s->author, value, 512-1);
353
            } else if (!strcmp(token, "Copyright")) {
354
                strncpy(s->copyright, value, 512-1);
355
            } else if (!strcmp(token, "TITLE") || !strcmp(token, "Title")) {
356
                strncpy(s->title, value, 512-1);
357
            }
358
        }
359
        av_free(strings);
360
    }
361
    if (url_feof(pb))
362
        return -1;
363
    
364
    PRINT(("NSV got infos; filepos %Ld\n", url_ftell(pb)));
365

  
366
    if (table_entries_used > 0) {
367
        nsv->index_entries = table_entries_used;
368
        nsv->nsvf_index_data = av_malloc(table_entries * sizeof(uint32_t));
369
        get_buffer(pb, nsv->nsvf_index_data, table_entries * sizeof(uint32_t));
370
    }
371

  
372
    PRINT(("NSV got index; filepos %Ld\n", url_ftell(pb)));
373
    
374
#ifdef DEBUG_DUMP_INDEX
375
#define V(v) ((v<0x20 || v > 127)?'.':v)
376
    /* dump index */
377
    PRINT(("NSV %d INDEX ENTRIES:\n", table_entries));
378
    PRINT(("NSV [dataoffset][fileoffset]\n", table_entries));
379
    for (i = 0; i < table_entries; i++) {
380
        unsigned char b[8];
381
        url_fseek(pb, size + nsv->nsvf_index_data[i], SEEK_SET);
382
        get_buffer(pb, b, 8);
383
        PRINT(("NSV [0x%08lx][0x%08lx]: %02x %02x %02x %02x %02x %02x %02x %02x"
384
           "%c%c%c%c%c%c%c%c\n",
385
           nsv->nsvf_index_data[i], size + nsv->nsvf_index_data[i],
386
           b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], 
387
           V(b[0]), V(b[1]), V(b[2]), V(b[3]), V(b[4]), V(b[5]), V(b[6]), V(b[7]) ));
388
    }
389
    //url_fseek(pb, size, SEEK_SET); /* go back to end of header */
390
#undef V
391
#endif
392
    
393
    url_fseek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */
394
    
395
    if (url_feof(pb))
396
        return -1;
397
    nsv->state = NSV_HAS_READ_NSVF;
398
    return 0;
399
}
400

  
401
static int nsv_parse_NSVs_header(AVFormatContext *s, AVFormatParameters *ap)
402
{
403
    NSVContext *nsv = s->priv_data;
404
    ByteIOContext *pb = &s->pb;
405
    uint32_t vtag, atag;
406
    uint16_t vwidth, vheight;
407
    uint32_t framerate;
408
    uint16_t unknown;
409
    AVStream *st;
410
    NSVStream *nst;
411
    PRINT(("%s()\n", __FUNCTION__));
412

  
413
    vtag = get_le32(pb);
414
    atag = get_le32(pb);
415
    vwidth = get_le16(pb);
416
    vheight = get_le16(pb);
417
    framerate = (uint8_t)get_byte(pb);
418
    /* XXX how big must the table be ? */
419
    /* seems there is more to that... */
420
    PRINT(("NSV NSVs framerate code %2x\n", framerate));
421
    framerate = (framerate & 0x80)?(nsv_framerate_table[framerate & 0x7F]):(framerate*AV_TIME_BASE);
422
    unknown = get_le16(pb);
423
#ifdef DEBUG
424
    print_tag("NSV NSVs vtag", vtag, 0);
425
    print_tag("NSV NSVs atag", atag, 0);
426
    PRINT(("NSV NSVs vsize %dx%d\n", vwidth, vheight));
427
    PRINT(("NSV NSVs framerate %2x\n", framerate));
428
#endif
429
    
430
    /* XXX change to ap != NULL ? */
431
    if (s->nb_streams == 0) { /* streams not yet published, let's do that */
432
        nsv->vtag = vtag;
433
        nsv->atag = atag;
434
        nsv->vwidth = vwidth;
435
        nsv->vheight = vwidth;
436
        if (vtag != T_NONE) {
437
            st = av_new_stream(s, NSV_ST_VIDEO);
438
            if (!st)
439
                goto fail;
440

  
441
            nst = av_mallocz(sizeof(NSVStream));
442
            if (!nst)
443
                goto fail;
444
            st->priv_data = nst;
445
            st->codec.codec_type = CODEC_TYPE_VIDEO;
446
            st->codec.codec_tag = vtag;
447
            st->codec.codec_id = codec_get_id(nsv_codec_video_tags, vtag);
448
            st->codec.width = vwidth;
449
            st->codec.height = vheight;
450
            st->codec.bits_per_sample = 24; /* depth XXX */
451

  
452
            st->codec.frame_rate = framerate;
453
            st->codec.frame_rate_base = AV_TIME_BASE;
454
            av_set_pts_info(st, 64, AV_TIME_BASE, framerate);
455
            st->start_time = 0;
456
            st->duration = nsv->duration;
457
        }
458
        if (atag != T_NONE) {
459
#ifndef DISABLE_AUDIO
460
            st = av_new_stream(s, NSV_ST_AUDIO);
461
            if (!st)
462
                goto fail;
463

  
464
            nst = av_mallocz(sizeof(NSVStream));
465
            if (!nst)
466
                goto fail;
467
            st->priv_data = nst;
468
            st->codec.codec_type = CODEC_TYPE_AUDIO;
469
            st->codec.codec_tag = atag;
470
            st->codec.codec_id = codec_get_id(nsv_codec_audio_tags, atag);
471
            st->start_time = 0;
472
            st->duration = nsv->duration;
473
            
474
            st->need_parsing = 1; /* for PCM we will read a chunk later and put correct info */
475
            /* XXX:FIXME */
476
            //st->codec.channels = 2; //XXX:channels;
477
            //st->codec.sample_rate = 1000;
478
            //av_set_pts_info(st, 64, 1, st->codec.sample_rate);
479

  
480
#endif
481
        }
482
#ifdef CHECK_SUBSEQUENT_NSVS
483
    } else {
484
        if (nsv->vtag != vtag || nsv->atag != atag || nsv->vwidth != vwidth || nsv->vheight != vwidth) {
485
            PRINT(("NSV NSVs header values differ from the first one!!!\n"));
486
            //return -1;
487
        }
488
#endif /* CHECK_SUBSEQUENT_NSVS */
489
    }
490

  
491
    nsv->state = NSV_HAS_READ_NSVS;
492
    return 0;
493
fail:
494
    /* XXX */
495
    nsv->state = NSV_UNSYNC;
496
    return -1;
497
}
498

  
499
static int nsv_read_header(AVFormatContext *s, AVFormatParameters *ap)
500
{
501
    NSVContext *nsv = s->priv_data;
502
    ByteIOContext *pb = &s->pb;
503
    uint32_t tag, tag1, handler;
504
    int codec_type, stream_index, frame_period, bit_rate, scale, rate;
505
    unsigned int size, nb_frames;
506
    int table_entries;
507
    int i, n, err;
508
    AVStream *st;
509
    NSVStream *ast;
510

  
511
    PRINT(("%s()\n", __FUNCTION__));
512
    PRINT(("filename '%s'\n", s->filename));
513

  
514
    nsv->state = NSV_UNSYNC;
515
    nsv->ahead[0].data = nsv->ahead[1].data = NULL;
516
    
517
    for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) {
518
        if (nsv_resync(s) < 0)
519
            return -1;
520
        if (nsv->state == NSV_FOUND_NSVF)
521
            err = nsv_parse_NSVf_header(s, ap);
522
            /* we need the first NSVs also... */
523
        if (nsv->state == NSV_FOUND_NSVS) {
524
            err = nsv_parse_NSVs_header(s, ap);
525
            break; /* we just want the first one */
526
        }
527
    }
528
    if (s->nb_streams < 1) /* no luck so far */
529
        return -1;
530
    /* now read the first chunk, so we can attempt to decode more info */
531
    err = nsv_read_chunk(s, 1);
532
    
533
    PRINT(("parsed header\n"));
534
    return 0;
535
}
536

  
537
static int nsv_read_chunk(AVFormatContext *s, int fill_header)
538
{
539
    NSVContext *nsv = s->priv_data;
540
    ByteIOContext *pb = &s->pb;
541
    AVStream *st[2] = {NULL, NULL};
542
    NSVStream *nst;
543
    AVPacket *pkt;
544
    uint32 v = 0;
545
    int i, err = 0;
546
    uint8 auxcount; /* number of aux metadata, also 4 bits of vsize */
547
    uint32 vsize;
548
    uint16 asize;
549
    uint16 auxsize;
550
    uint32 auxtag;
551
    
552
    PRINT(("%s(%d)\n", __FUNCTION__, fill_header));
553
    
554
    if (nsv->ahead[0].data || nsv->ahead[1].data)
555
        return 0; //-1; /* hey! eat what you've in your plate first! */
556

  
557
null_chunk_retry:
558
    if (url_feof(pb))
559
        return -1;
560
    
561
    for (i = 0; i < NSV_MAX_RESYNC_TRIES && nsv->state < NSV_FOUND_NSVS && !err; i++)
562
        err = nsv_resync(s);
563
    if (err < 0)
564
        return err;
565
    if (nsv->state == NSV_FOUND_NSVS)
566
        err = nsv_parse_NSVs_header(s, NULL);
567
    if (err < 0)
568
        return err;
569
    if (nsv->state != NSV_HAS_READ_NSVS && nsv->state != NSV_FOUND_BEEF)
570
        return -1;
571
    
572
    auxcount = get_byte(pb);
573
    vsize = get_le16(pb);
574
    asize = get_le16(pb);
575
    vsize = (vsize << 4) | (auxcount >> 4);
576
    auxcount &= 0x0f;
577
    PRINT(("NSV CHUNK %d aux, %ld bytes video, %d bytes audio\n", auxcount, vsize, asize));
578
    /* skip aux stuff */
579
    for (i = 0; i < auxcount; i++) {
580
        auxsize = get_le16(pb);
581
        auxtag = get_le32(pb);
582
        PRINT(("NSV aux data: '%c%c%c%c', %d bytes\n", 
583
              (auxtag & 0x0ff), 
584
              ((auxtag >> 8) & 0x0ff), 
585
              ((auxtag >> 16) & 0x0ff),
586
              ((auxtag >> 24) & 0x0ff),
587
              auxsize));
588
        url_fskip(pb, auxsize);
589
        vsize -= auxsize + sizeof(uint16) + sizeof(uint32); /* that's becoming braindead */
590
    }
591
    
592
    if (url_feof(pb))
593
        return -1;
594
    if (!vsize && !asize) {
595
        nsv->state = NSV_UNSYNC;
596
        goto null_chunk_retry;
597
    }
598
    
599
    /* map back streams to v,a */
600
    if (s->streams[0])
601
        st[s->streams[0]->id] = s->streams[0];
602
    if (s->streams[1])
603
        st[s->streams[1]->id] = s->streams[1];
604
    
605
    if (vsize/* && st[NSV_ST_VIDEO]*/) {
606
        nst = st[NSV_ST_VIDEO]->priv_data;
607
        pkt = &nsv->ahead[NSV_ST_VIDEO];
608
        av_new_packet(pkt, vsize);
609
        get_buffer(pb, pkt->data, vsize);
610
        pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO;
611
        pkt->dts = nst->frame_offset++;
612
        pkt->flags |= PKT_FLAG_KEY; /* stupid format has no way to tell XXX: try the index */
613
/*
614
        for (i = 0; i < MIN(8, vsize); i++)
615
            PRINT(("NSV video: [%d] = %02x\n", i, pkt->data[i]));
616
*/
617
    }
618
    if (asize/*st[NSV_ST_AUDIO]*/) {
619
        nst = st[NSV_ST_AUDIO]->priv_data;
620
        pkt = &nsv->ahead[NSV_ST_AUDIO];
621
        /* read raw audio specific header on the first audio chunk... */
622
        /* on ALL audio chunks ?? seems so! */
623
        if (asize && st[NSV_ST_AUDIO]->codec.codec_tag == MKTAG('P', 'C', 'M', ' ')/* && fill_header*/) {
624
            uint8_t bps;
625
            uint8_t channels;
626
            uint16_t samplerate;
627
            bps = get_byte(pb);
628
            channels = get_byte(pb);
629
            samplerate = get_le16(pb);
630
            asize-=4;
631
            PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %ld\n", bps, channels, samplerate));
632
            if (fill_header) {
633
                st[NSV_ST_AUDIO]->need_parsing = 0; /* we know everything */
634
                if (bps != 16) {
635
                    PRINT(("NSV AUDIO bit/sample != 16 (%d)!!!\n", bps));
636
                }
637
                bps /= channels; // ???
638
                if (bps == 8)
639
                    st[NSV_ST_AUDIO]->codec.codec_id = CODEC_ID_PCM_U8;
640
                samplerate /= 4;/* UGH ??? XXX */
641
                channels = 1;
642
                st[NSV_ST_AUDIO]->codec.channels = channels;
643
                st[NSV_ST_AUDIO]->codec.sample_rate = samplerate;
644
                av_set_pts_info(st[NSV_ST_AUDIO], 64, 1, 
645
                                st[NSV_ST_AUDIO]->codec.sample_rate);
646
                PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %ld\n", bps, channels, samplerate));
647
            }
648
        }
649
        av_new_packet(pkt, asize);
650
        if (asize)
651
            get_buffer(pb, pkt->data, asize);
652
        pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO;
653
        //pkt->dts = nst->frame_offset;
654
        //if (nst->sample_size)
655
        //    pkt->dts /= nst->sample_size;
656
        nst->frame_offset += asize; // XXX: that's valid only for PCM !?
657
    }
658
    
659
    //pkt->flags |= PKT_FLAG_KEY;
660
    nsv->state = NSV_UNSYNC;
661
    return 0;
662
}
663

  
664

  
665
static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt)
666
{
667
    NSVContext *nsv = s->priv_data;
668
    ByteIOContext *pb = &s->pb;
669
    int i, err = 0;
670

  
671
    PRINT(("%s()\n", __FUNCTION__));
672
    
673
    /* in case we don't already have something to eat ... */
674
    if (nsv->ahead[0].data == NULL && nsv->ahead[1].data == NULL)
675
        err = nsv_read_chunk(s, 0);
676
    if (err < 0)
677
        return err;
678
    
679
    /* now pick one of the plates */
680
    for (i = 0; i < 2; i++) {
681
        if (nsv->ahead[i].data) {
682
        	PRINT(("%s: using cached packet[%d]\n", __FUNCTION__, i));
683
            /* avoid the cost of new_packet + memcpy(->data) */
684
            memcpy(pkt, &nsv->ahead[i], sizeof(AVPacket));
685
            nsv->ahead[i].data = NULL; /* we ate that one */
686
            return pkt->size;
687
        }
688
    }
689
    
690
    /* this restaurant is not approvisionned :^] */
691
    return -1;
692
}
693

  
694
static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
695
{
696
    NSVContext *avi = s->priv_data;
697
    AVStream *st;
698
    NSVStream *ast;
699
    int frame_number, i;
700
    int64_t pos;
701

  
702
    return -1;
703
}
704

  
705
static int nsv_read_close(AVFormatContext *s)
706
{
707
    int i;
708
    NSVContext *nsv = s->priv_data;
709

  
710
    if (nsv->index_entries)
711
        av_free(nsv->nsvf_index_data);
712

  
713
#if 0
714

  
715
    for(i=0;i<s->nb_streams;i++) {
716
        AVStream *st = s->streams[i];
717
        NSVStream *ast = st->priv_data;
718
        if(ast){
719
            av_free(ast->index_entries);
720
            av_free(ast);
721
        }
722
        av_free(st->codec.extradata);
723
        av_free(st->codec.palctrl);
724
    }
725

  
726
#endif
727
    return 0;
728
}
729

  
730
static int nsv_probe(AVProbeData *p)
731
{
732
    int i;
733
    PRINT(("nsv_probe(), buf_size %d\n", p->buf_size));
734
    /* check file header */
735
    if (p->buf_size <= 32)
736
        return 0;
737
    if (p->buf[0] == 'N' && p->buf[1] == 'S' &&
738
        p->buf[2] == 'V' && p->buf[3] == 'f')
739
        return AVPROBE_SCORE_MAX;
740
    /* streamed files might not have any header */
741
    if (p->buf[0] == 'N' && p->buf[1] == 'S' &&
742
        p->buf[2] == 'V' && p->buf[3] == 's')
743
        return AVPROBE_SCORE_MAX;
744
    /* XXX: do streamed files always start at chunk boundary ?? */
745
    /* or do we need to search NSVs in the byte stream ? */
746
    /* seems the servers don't bother starting clean chunks... */
747
    /* sometimes even the first header is at 9KB or something :^) */
748
    for (i = 1; i < p->buf_size - 3; i++) {
749
        if (p->buf[i+0] == 'N' && p->buf[i+1] == 'S' &&
750
            p->buf[i+2] == 'V' && p->buf[i+3] == 's')
751
            return AVPROBE_SCORE_MAX-20;
752
    }
753
    /* so we'll have more luck on extension... */
754
    if (match_ext(p->filename, "nsv"))
755
        return AVPROBE_SCORE_MAX-20;
756
    /* FIXME: add mime-type check */
757
    return 0;
758
}
759

  
760
static AVInputFormat nsv_iformat = {
761
    "nsv",
762
    "NullSoft Video format",
763
    sizeof(NSVContext),
764
    nsv_probe,
765
    nsv_read_header,
766
    nsv_read_packet,
767
    nsv_read_close,
768
    nsv_read_seek,
769
};
770

  
771
int nsvdec_init(void)
772
{
773
    av_register_input_format(&nsv_iformat);
774
    return 0;
775
}

Also available in: Unified diff