Define AVMediaType enum, and use it instead of enum CodecType, which
[libav.git] / libavformat / nsvdec.c
CommitLineData
27d5f18f 1/*
7fbde343 2 * NSV demuxer
406792e7 3 * Copyright (c) 2004 The FFmpeg Project
27d5f18f 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
27d5f18f 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21#include "avformat.h"
9d9f4119 22#include "riff.h"
27d5f18f 23
14f283d8 24//#define DEBUG
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25//#define DEBUG_DUMP_INDEX // XXX dumbdriving-271.nsv breaks with it commented!!
26//#define DEBUG_SEEK
27#define CHECK_SUBSEQUENT_NSVS
28//#define DISABLE_AUDIO
29
30/* max bytes to crawl for trying to resync
31 * stupid streaming servers don't start at chunk boundaries...
32 */
33#define NSV_MAX_RESYNC (500*1024)
34#define NSV_MAX_RESYNC_TRIES 300
35
36/*
37 * First version by Francois Revol - revol@free.fr
38 * References:
39 * (1) http://www.multimedia.cx/nsv-format.txt
40 * seems someone came to the same conclusions as me, and updated it:
41 * (2) http://www.stud.ktu.lt/~vitslav/nsv/nsv-format.txt
42 * http://www.stud.ktu.lt/~vitslav/nsv/
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43 * official docs
44 * (3) http://ultravox.aol.com/NSVFormat.rtf
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45 * Sample files:
46 * (S1) http://www.nullsoft.com/nsv/samples/
47 * http://www.nullsoft.com/nsv/samples/faster.nsv
48 * http://streamripper.sourceforge.net/openbb/read.php?TID=492&page=4
49 */
50
51/*
52 * notes on the header (Francois Revol):
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53 *
54 * It is followed by strings, then a table, but nothing tells
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55 * where the table begins according to (1). After checking faster.nsv,
56 * I believe NVSf[16-19] gives the size of the strings data
57 * (that is the offset of the data table after the header).
58 * After checking all samples from (S1) all confirms this.
59 *
60 * Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC,
61 * I noticed there was about 1 NVSs chunk/s, so I ran
62 * strings faster.nsv | grep NSVs | wc -l
115329f1 63 * which gave me 180. That leads me to think that NSVf[12-15] might be the
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64 * file length in milliseconds.
65 * Let's try that:
66 * 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
67 * except for nstrailer (which doesn't have an NSVf header), it repports correct time.
68 *
115329f1 69 * nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks,
27d5f18f 70 * so the header seems to not be mandatory. (for streaming).
115329f1 71 *
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72 * index slice duration check (excepts nsvtrailer.nsv):
73 * 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
74 */
75
76/*
77 * TODO:
78 * - handle timestamps !!!
79 * - use index
80 * - mime-type in probe()
81 * - seek
82 */
83
84#ifdef DEBUG
85#define PRINT(_v) printf _v
86#else
115329f1 87#define PRINT(_v)
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88#endif
89
90#if 0
91struct NSVf_header {
92 uint32_t chunk_tag; /* 'NSVf' */
93 uint32_t chunk_size;
755bfeab 94 uint32_t file_size; /* max 4GB ??? no one learns anything it seems :^) */
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95 uint32_t file_length; //unknown1; /* what about MSB of file_size ? */
96 uint32_t info_strings_size; /* size of the info strings */ //unknown2;
97 uint32_t table_entries;
98 uint32_t table_entries_used; /* the left ones should be -1 */
99};
100
101struct NSVs_header {
102 uint32_t chunk_tag; /* 'NSVs' */
103 uint32_t v4cc; /* or 'NONE' */
104 uint32_t a4cc; /* or 'NONE' */
105 uint16_t vwidth; /* assert(vwidth%16==0) */
106 uint16_t vheight; /* assert(vheight%16==0) */
107 uint8_t framerate; /* value = (framerate&0x80)?frtable[frameratex0x7f]:framerate */
108 uint16_t unknown;
109};
110
111struct nsv_avchunk_header {
112 uint8_t vchunk_size_lsb;
113 uint16_t vchunk_size_msb; /* value = (vchunk_size_msb << 4) | (vchunk_size_lsb >> 4) */
114 uint16_t achunk_size;
115};
116
117struct nsv_pcm_header {
118 uint8_t bits_per_sample;
119 uint8_t channel_count;
120 uint16_t sample_rate;
121};
122#endif
123
124/* variation from avi.h */
125/*typedef struct CodecTag {
126 int id;
127 unsigned int tag;
128} CodecTag;*/
129
130/* tags */
131
132#define T_NSVF MKTAG('N', 'S', 'V', 'f') /* file header */
133#define T_NSVS MKTAG('N', 'S', 'V', 's') /* chunk header */
134#define T_TOC2 MKTAG('T', 'O', 'C', '2') /* extra index marker */
135#define T_NONE MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */
136#define T_SUBT MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */
137#define T_ASYN MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */
138#define T_KEYF MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */
139
140#define TB_NSVF MKBETAG('N', 'S', 'V', 'f')
141#define TB_NSVS MKBETAG('N', 'S', 'V', 's')
142
f4433de9 143/* hardcoded stream indexes */
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144#define NSV_ST_VIDEO 0
145#define NSV_ST_AUDIO 1
146#define NSV_ST_SUBT 2
147
148enum NSVStatus {
149 NSV_UNSYNC,
150 NSV_FOUND_NSVF,
151 NSV_HAS_READ_NSVF,
152 NSV_FOUND_NSVS,
153 NSV_HAS_READ_NSVS,
154 NSV_FOUND_BEEF,
155 NSV_GOT_VIDEO,
156 NSV_GOT_AUDIO,
157};
158
159typedef struct NSVStream {
160 int frame_offset; /* current frame (video) or byte (audio) counter
161 (used to compute the pts) */
162 int scale;
115329f1 163 int rate;
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164 int sample_size; /* audio only data */
165 int start;
115329f1 166
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167 int new_frame_offset; /* temporary storage (used during seek) */
168 int cum_len; /* temporary storage (used during seek) */
169} NSVStream;
170
171typedef struct {
172 int base_offset;
173 int NSVf_end;
67d04927 174 uint32_t *nsvs_file_offset;
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175 int index_entries;
176 enum NSVStatus state;
177 AVPacket ahead[2]; /* [v, a] if .data is !NULL there is something */
178 /* cached */
179 int64_t duration;
180 uint32_t vtag, atag;
181 uint16_t vwidth, vheight;
2f394e1c 182 int16_t avsync;
2615800a 183 AVRational framerate;
4fabb60d 184 uint32_t *nsvs_timestamps;
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185 //DVDemuxContext* dv_demux;
186} NSVContext;
187
7caf0cc6 188static const AVCodecTag nsv_codec_video_tags[] = {
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189 { CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') },
190 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
191 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
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192 { CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') },
193 { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
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194 { CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') },
195 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
196 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
5ce117c3 197 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
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198/*
199 { CODEC_ID_VP4, MKTAG('V', 'P', '4', ' ') },
200 { CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') },
27d5f18f 201*/
755bfeab 202 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, /* cf sample xvid decoder from nsv_codec_sdk.zip */
27d5f18f 203 { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') },
bc2d2a07 204 { CODEC_ID_NONE, 0 },
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205};
206
7caf0cc6 207static const AVCodecTag nsv_codec_audio_tags[] = {
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208 { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
209 { CODEC_ID_AAC, MKTAG('A', 'A', 'C', ' ') },
210 { CODEC_ID_AAC, MKTAG('A', 'A', 'C', 'P') },
211 { CODEC_ID_SPEEX, MKTAG('S', 'P', 'X', ' ') },
27d5f18f 212 { CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') },
bc2d2a07 213 { CODEC_ID_NONE, 0 },
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214};
215
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216//static int nsv_load_index(AVFormatContext *s);
217static int nsv_read_chunk(AVFormatContext *s, int fill_header);
218
219#ifdef DEBUG
220static void print_tag(const char *str, unsigned int tag, int size)
221{
222 printf("%s: tag=%c%c%c%c\n",
223 str, tag & 0xff,
224 (tag >> 8) & 0xff,
225 (tag >> 16) & 0xff,
226 (tag >> 24) & 0xff);
227}
228#endif
229
230/* try to find something we recognize, and set the state accordingly */
231static int nsv_resync(AVFormatContext *s)
232{
233 NSVContext *nsv = s->priv_data;
899681cd 234 ByteIOContext *pb = s->pb;
e4917f59 235 uint32_t v = 0;
27d5f18f 236 int i;
115329f1 237
4733abcb 238 PRINT(("%s(), offset = %"PRId64", state = %d\n", __FUNCTION__, url_ftell(pb), nsv->state));
115329f1 239
27d5f18f 240 //nsv->state = NSV_UNSYNC;
115329f1 241
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242 for (i = 0; i < NSV_MAX_RESYNC; i++) {
243 if (url_feof(pb)) {
244 PRINT(("NSV EOF\n"));
245 nsv->state = NSV_UNSYNC;
246 return -1;
247 }
248 v <<= 8;
249 v |= get_byte(pb);
250/*
251 if (i < 8) {
252 PRINT(("NSV resync: [%d] = %02x\n", i, v & 0x0FF));
253 }
254*/
115329f1 255
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256 if ((v & 0x0000ffff) == 0xefbe) { /* BEEF */
257 PRINT(("NSV resynced on BEEF after %d bytes\n", i+1));
258 nsv->state = NSV_FOUND_BEEF;
259 return 0;
260 }
261 /* we read as big endian, thus the MK*BE* */
262 if (v == TB_NSVF) { /* NSVf */
263 PRINT(("NSV resynced on NSVf after %d bytes\n", i+1));
264 nsv->state = NSV_FOUND_NSVF;
265 return 0;
266 }
267 if (v == MKBETAG('N', 'S', 'V', 's')) { /* NSVs */
268 PRINT(("NSV resynced on NSVs after %d bytes\n", i+1));
269 nsv->state = NSV_FOUND_NSVS;
270 return 0;
271 }
115329f1 272
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273 }
274 PRINT(("NSV sync lost\n"));
275 return -1;
276}
277
278static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap)
279{
280 NSVContext *nsv = s->priv_data;
899681cd 281 ByteIOContext *pb = s->pb;
88730be6 282 unsigned int file_size, size;
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283 int64_t duration;
284 int strings_size;
285 int table_entries;
286 int table_entries_used;
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287
288 PRINT(("%s()\n", __FUNCTION__));
289
290 nsv->state = NSV_UNSYNC; /* in case we fail */
115329f1 291
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292 size = get_le32(pb);
293 if (size < 28)
294 return -1;
295 nsv->NSVf_end = size;
296
297 //s->file_size = (uint32_t)get_le32(pb);
298 file_size = (uint32_t)get_le32(pb);
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299 PRINT(("NSV NSVf chunk_size %u\n", size));
300 PRINT(("NSV NSVf file_size %u\n", file_size));
27d5f18f 301
c0df9d75 302 nsv->duration = duration = get_le32(pb); /* in ms */
4733abcb 303 PRINT(("NSV NSVf duration %"PRId64" ms\n", duration));
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304 // XXX: store it in AVStreams
305
306 strings_size = get_le32(pb);
307 table_entries = get_le32(pb);
308 table_entries_used = get_le32(pb);
115329f1 309 PRINT(("NSV NSVf info-strings size: %d, table entries: %d, bis %d\n",
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310 strings_size, table_entries, table_entries_used));
311 if (url_feof(pb))
312 return -1;
115329f1 313
4733abcb 314 PRINT(("NSV got header; filepos %"PRId64"\n", url_ftell(pb)));
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315
316 if (strings_size > 0) {
317 char *strings; /* last byte will be '\0' to play safe with str*() */
318 char *p, *endp;
319 char *token, *value;
320 char quote;
321
322 p = strings = av_mallocz(strings_size + 1);
323 endp = strings + strings_size;
324 get_buffer(pb, strings, strings_size);
325 while (p < endp) {
326 while (*p == ' ')
327 p++; /* strip out spaces */
328 if (p >= endp-2)
329 break;
330 token = p;
331 p = strchr(p, '=');
332 if (!p || p >= endp-2)
333 break;
334 *p++ = '\0';
335 quote = *p++;
336 value = p;
337 p = strchr(p, quote);
338 if (!p || p >= endp)
339 break;
340 *p++ = '\0';
341 PRINT(("NSV NSVf INFO: %s='%s'\n", token, value));
a233eaa6 342 av_metadata_set(&s->metadata, token, value);
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343 }
344 av_free(strings);
345 }
346 if (url_feof(pb))
347 return -1;
115329f1 348
4733abcb 349 PRINT(("NSV got infos; filepos %"PRId64"\n", url_ftell(pb)));
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350
351 if (table_entries_used > 0) {
4fabb60d 352 int i;
27d5f18f 353 nsv->index_entries = table_entries_used;
4fabb60d 354 if((unsigned)table_entries_used >= UINT_MAX / sizeof(uint32_t))
568e18b1 355 return -1;
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JM
356 nsv->nsvs_file_offset = av_malloc((unsigned)table_entries_used * sizeof(uint32_t));
357
358 for(i=0;i<table_entries_used;i++)
359 nsv->nsvs_file_offset[i] = get_le32(pb) + size;
360
361 if(table_entries > table_entries_used &&
362 get_le32(pb) == MKTAG('T','O','C','2')) {
363 nsv->nsvs_timestamps = av_malloc((unsigned)table_entries_used*sizeof(uint32_t));
364 for(i=0;i<table_entries_used;i++) {
365 nsv->nsvs_timestamps[i] = get_le32(pb);
366 }
367 }
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FR
368 }
369
4733abcb 370 PRINT(("NSV got index; filepos %"PRId64"\n", url_ftell(pb)));
115329f1 371
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372#ifdef DEBUG_DUMP_INDEX
373#define V(v) ((v<0x20 || v > 127)?'.':v)
374 /* dump index */
375 PRINT(("NSV %d INDEX ENTRIES:\n", table_entries));
376 PRINT(("NSV [dataoffset][fileoffset]\n", table_entries));
377 for (i = 0; i < table_entries; i++) {
378 unsigned char b[8];
67d04927 379 url_fseek(pb, size + nsv->nsvs_file_offset[i], SEEK_SET);
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380 get_buffer(pb, b, 8);
381 PRINT(("NSV [0x%08lx][0x%08lx]: %02x %02x %02x %02x %02x %02x %02x %02x"
382 "%c%c%c%c%c%c%c%c\n",
67d04927 383 nsv->nsvs_file_offset[i], size + nsv->nsvs_file_offset[i],
115329f1 384 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
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385 V(b[0]), V(b[1]), V(b[2]), V(b[3]), V(b[4]), V(b[5]), V(b[6]), V(b[7]) ));
386 }
387 //url_fseek(pb, size, SEEK_SET); /* go back to end of header */
388#undef V
389#endif
115329f1 390
27d5f18f 391 url_fseek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */
115329f1 392
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393 if (url_feof(pb))
394 return -1;
395 nsv->state = NSV_HAS_READ_NSVF;
396 return 0;
397}
398
399static int nsv_parse_NSVs_header(AVFormatContext *s, AVFormatParameters *ap)
400{
401 NSVContext *nsv = s->priv_data;
899681cd 402 ByteIOContext *pb = s->pb;
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403 uint32_t vtag, atag;
404 uint16_t vwidth, vheight;
c8389233
MN
405 AVRational framerate;
406 int i;
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407 AVStream *st;
408 NSVStream *nst;
409 PRINT(("%s()\n", __FUNCTION__));
410
411 vtag = get_le32(pb);
412 atag = get_le32(pb);
413 vwidth = get_le16(pb);
414 vheight = get_le16(pb);
c8389233 415 i = get_byte(pb);
0a4250bc 416
c8389233 417 PRINT(("NSV NSVs framerate code %2x\n", i));
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JP
418 if(i&0x80) { /* odd way of giving native framerates from docs */
419 int t=(i & 0x7F)>>2;
420 if(t<16) framerate = (AVRational){1, t+1};
421 else framerate = (AVRational){t-15, 1};
422
423 if(i&1){
424 framerate.num *= 1000;
425 framerate.den *= 1001;
426 }
427
428 if((i&3)==3) framerate.num *= 24;
429 else if((i&3)==2) framerate.num *= 25;
430 else framerate.num *= 30;
431 }
432 else
433 framerate= (AVRational){i, 1};
434
2f394e1c 435 nsv->avsync = get_le16(pb);
2615800a 436 nsv->framerate = framerate;
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FR
437#ifdef DEBUG
438 print_tag("NSV NSVs vtag", vtag, 0);
439 print_tag("NSV NSVs atag", atag, 0);
440 PRINT(("NSV NSVs vsize %dx%d\n", vwidth, vheight));
27d5f18f 441#endif
115329f1 442
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FR
443 /* XXX change to ap != NULL ? */
444 if (s->nb_streams == 0) { /* streams not yet published, let's do that */
445 nsv->vtag = vtag;
446 nsv->atag = atag;
447 nsv->vwidth = vwidth;
448 nsv->vheight = vwidth;
449 if (vtag != T_NONE) {
4fabb60d 450 int i;
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FR
451 st = av_new_stream(s, NSV_ST_VIDEO);
452 if (!st)
453 goto fail;
454
455 nst = av_mallocz(sizeof(NSVStream));
456 if (!nst)
457 goto fail;
458 st->priv_data = nst;
72415b2a 459 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
01f4895c 460 st->codec->codec_tag = vtag;
1a40491e 461 st->codec->codec_id = ff_codec_get_id(nsv_codec_video_tags, vtag);
01f4895c
MN
462 st->codec->width = vwidth;
463 st->codec->height = vheight;
dd1c8f3e 464 st->codec->bits_per_coded_sample = 24; /* depth XXX */
27d5f18f 465
c8389233 466 av_set_pts_info(st, 64, framerate.den, framerate.num);
27d5f18f 467 st->start_time = 0;
c0df9d75 468 st->duration = av_rescale(nsv->duration, framerate.num, 1000*framerate.den);
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JM
469
470 for(i=0;i<nsv->index_entries;i++) {
471 if(nsv->nsvs_timestamps) {
472 av_add_index_entry(st, nsv->nsvs_file_offset[i], nsv->nsvs_timestamps[i],
473 0, 0, AVINDEX_KEYFRAME);
474 } else {
475 int64_t ts = av_rescale(i*nsv->duration/nsv->index_entries, framerate.num, 1000*framerate.den);
476 av_add_index_entry(st, nsv->nsvs_file_offset[i], ts, 0, 0, AVINDEX_KEYFRAME);
477 }
478 }
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FR
479 }
480 if (atag != T_NONE) {
481#ifndef DISABLE_AUDIO
482 st = av_new_stream(s, NSV_ST_AUDIO);
483 if (!st)
484 goto fail;
485
486 nst = av_mallocz(sizeof(NSVStream));
487 if (!nst)
488 goto fail;
489 st->priv_data = nst;
72415b2a 490 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
01f4895c 491 st->codec->codec_tag = atag;
1a40491e 492 st->codec->codec_id = ff_codec_get_id(nsv_codec_audio_tags, atag);
115329f1 493
57004ff1 494 st->need_parsing = AVSTREAM_PARSE_FULL; /* for PCM we will read a chunk later and put correct info */
27d5f18f 495
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JP
496 /* set timebase to common denominator of ms and framerate */
497 av_set_pts_info(st, 64, 1, framerate.num*1000);
498 st->start_time = 0;
499 st->duration = (int64_t)nsv->duration * framerate.num;
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FR
500#endif
501 }
502#ifdef CHECK_SUBSEQUENT_NSVS
503 } else {
504 if (nsv->vtag != vtag || nsv->atag != atag || nsv->vwidth != vwidth || nsv->vheight != vwidth) {
505 PRINT(("NSV NSVs header values differ from the first one!!!\n"));
506 //return -1;
507 }
508#endif /* CHECK_SUBSEQUENT_NSVS */
509 }
510
511 nsv->state = NSV_HAS_READ_NSVS;
512 return 0;
513fail:
514 /* XXX */
515 nsv->state = NSV_UNSYNC;
516 return -1;
517}
518
519static int nsv_read_header(AVFormatContext *s, AVFormatParameters *ap)
520{
521 NSVContext *nsv = s->priv_data;
88730be6 522 int i, err;
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FR
523
524 PRINT(("%s()\n", __FUNCTION__));
525 PRINT(("filename '%s'\n", s->filename));
526
527 nsv->state = NSV_UNSYNC;
528 nsv->ahead[0].data = nsv->ahead[1].data = NULL;
115329f1 529
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FR
530 for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) {
531 if (nsv_resync(s) < 0)
532 return -1;
533 if (nsv->state == NSV_FOUND_NSVF)
534 err = nsv_parse_NSVf_header(s, ap);
535 /* we need the first NSVs also... */
536 if (nsv->state == NSV_FOUND_NSVS) {
537 err = nsv_parse_NSVs_header(s, ap);
538 break; /* we just want the first one */
539 }
540 }
541 if (s->nb_streams < 1) /* no luck so far */
542 return -1;
543 /* now read the first chunk, so we can attempt to decode more info */
544 err = nsv_read_chunk(s, 1);
115329f1 545
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FR
546 PRINT(("parsed header\n"));
547 return 0;
548}
549
550static int nsv_read_chunk(AVFormatContext *s, int fill_header)
551{
552 NSVContext *nsv = s->priv_data;
899681cd 553 ByteIOContext *pb = s->pb;
27d5f18f
FR
554 AVStream *st[2] = {NULL, NULL};
555 NSVStream *nst;
556 AVPacket *pkt;
27d5f18f 557 int i, err = 0;
e4917f59
MM
558 uint8_t auxcount; /* number of aux metadata, also 4 bits of vsize */
559 uint32_t vsize;
560 uint16_t asize;
561 uint16_t auxsize;
562 uint32_t auxtag;
115329f1 563
27d5f18f 564 PRINT(("%s(%d)\n", __FUNCTION__, fill_header));
115329f1 565
27d5f18f
FR
566 if (nsv->ahead[0].data || nsv->ahead[1].data)
567 return 0; //-1; /* hey! eat what you've in your plate first! */
568
569null_chunk_retry:
570 if (url_feof(pb))
571 return -1;
115329f1 572
27d5f18f
FR
573 for (i = 0; i < NSV_MAX_RESYNC_TRIES && nsv->state < NSV_FOUND_NSVS && !err; i++)
574 err = nsv_resync(s);
575 if (err < 0)
576 return err;
577 if (nsv->state == NSV_FOUND_NSVS)
578 err = nsv_parse_NSVs_header(s, NULL);
579 if (err < 0)
580 return err;
581 if (nsv->state != NSV_HAS_READ_NSVS && nsv->state != NSV_FOUND_BEEF)
582 return -1;
115329f1 583
27d5f18f
FR
584 auxcount = get_byte(pb);
585 vsize = get_le16(pb);
586 asize = get_le16(pb);
587 vsize = (vsize << 4) | (auxcount >> 4);
588 auxcount &= 0x0f;
bf4e3bd2 589 PRINT(("NSV CHUNK %d aux, %u bytes video, %d bytes audio\n", auxcount, vsize, asize));
27d5f18f
FR
590 /* skip aux stuff */
591 for (i = 0; i < auxcount; i++) {
592 auxsize = get_le16(pb);
593 auxtag = get_le32(pb);
115329f1
DB
594 PRINT(("NSV aux data: '%c%c%c%c', %d bytes\n",
595 (auxtag & 0x0ff),
596 ((auxtag >> 8) & 0x0ff),
27d5f18f
FR
597 ((auxtag >> 16) & 0x0ff),
598 ((auxtag >> 24) & 0x0ff),
599 auxsize));
600 url_fskip(pb, auxsize);
e4917f59 601 vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */
27d5f18f 602 }
115329f1 603
27d5f18f
FR
604 if (url_feof(pb))
605 return -1;
606 if (!vsize && !asize) {
607 nsv->state = NSV_UNSYNC;
608 goto null_chunk_retry;
609 }
115329f1 610
27d5f18f
FR
611 /* map back streams to v,a */
612 if (s->streams[0])
613 st[s->streams[0]->id] = s->streams[0];
614 if (s->streams[1])
615 st[s->streams[1]->id] = s->streams[1];
115329f1 616
27d5f18f
FR
617 if (vsize/* && st[NSV_ST_VIDEO]*/) {
618 nst = st[NSV_ST_VIDEO]->priv_data;
619 pkt = &nsv->ahead[NSV_ST_VIDEO];
2692067a 620 av_get_packet(pb, pkt, vsize);
27d5f18f 621 pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO;
8076609a 622 pkt->dts = nst->frame_offset;
2f394e1c 623 pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */
27d5f18f
FR
624/*
625 for (i = 0; i < MIN(8, vsize); i++)
626 PRINT(("NSV video: [%d] = %02x\n", i, pkt->data[i]));
627*/
628 }
638f489c 629 if(st[NSV_ST_VIDEO])
fffd6a5f 630 ((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset++;
8076609a 631
27d5f18f
FR
632 if (asize/*st[NSV_ST_AUDIO]*/) {
633 nst = st[NSV_ST_AUDIO]->priv_data;
634 pkt = &nsv->ahead[NSV_ST_AUDIO];
635 /* read raw audio specific header on the first audio chunk... */
636 /* on ALL audio chunks ?? seems so! */
01f4895c 637 if (asize && st[NSV_ST_AUDIO]->codec->codec_tag == MKTAG('P', 'C', 'M', ' ')/* && fill_header*/) {
27d5f18f
FR
638 uint8_t bps;
639 uint8_t channels;
640 uint16_t samplerate;
641 bps = get_byte(pb);
642 channels = get_byte(pb);
643 samplerate = get_le16(pb);
644 asize-=4;
bf4e3bd2 645 PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate));
27d5f18f 646 if (fill_header) {
57004ff1 647 st[NSV_ST_AUDIO]->need_parsing = AVSTREAM_PARSE_NONE; /* we know everything */
27d5f18f
FR
648 if (bps != 16) {
649 PRINT(("NSV AUDIO bit/sample != 16 (%d)!!!\n", bps));
650 }
651 bps /= channels; // ???
652 if (bps == 8)
01f4895c 653 st[NSV_ST_AUDIO]->codec->codec_id = CODEC_ID_PCM_U8;
27d5f18f
FR
654 samplerate /= 4;/* UGH ??? XXX */
655 channels = 1;
01f4895c
MN
656 st[NSV_ST_AUDIO]->codec->channels = channels;
657 st[NSV_ST_AUDIO]->codec->sample_rate = samplerate;
bf4e3bd2 658 PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate));
27d5f18f
FR
659 }
660 }
2692067a 661 av_get_packet(pb, pkt, asize);
27d5f18f 662 pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO;
2f394e1c
JP
663 pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */
664 if( nsv->state == NSV_HAS_READ_NSVS && st[NSV_ST_VIDEO] ) {
665 /* on a nsvs frame we have new information on a/v sync */
666 pkt->dts = (((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset-1);
2615800a
MN
667 pkt->dts *= (int64_t)1000 * nsv->framerate.den;
668 pkt->dts += (int64_t)nsv->avsync * nsv->framerate.num;
2f394e1c
JP
669 PRINT(("NSV AUDIO: sync:%d, dts:%"PRId64, nsv->avsync, pkt->dts));
670 }
671 nst->frame_offset++;
27d5f18f 672 }
115329f1 673
27d5f18f
FR
674 nsv->state = NSV_UNSYNC;
675 return 0;
676}
677
678
679static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt)
680{
681 NSVContext *nsv = s->priv_data;
27d5f18f
FR
682 int i, err = 0;
683
684 PRINT(("%s()\n", __FUNCTION__));
115329f1 685
27d5f18f
FR
686 /* in case we don't already have something to eat ... */
687 if (nsv->ahead[0].data == NULL && nsv->ahead[1].data == NULL)
688 err = nsv_read_chunk(s, 0);
689 if (err < 0)
690 return err;
115329f1 691
27d5f18f
FR
692 /* now pick one of the plates */
693 for (i = 0; i < 2; i++) {
694 if (nsv->ahead[i].data) {
bb270c08 695 PRINT(("%s: using cached packet[%d]\n", __FUNCTION__, i));
27d5f18f
FR
696 /* avoid the cost of new_packet + memcpy(->data) */
697 memcpy(pkt, &nsv->ahead[i], sizeof(AVPacket));
698 nsv->ahead[i].data = NULL; /* we ate that one */
699 return pkt->size;
700 }
701 }
115329f1 702
27d5f18f
FR
703 /* this restaurant is not approvisionned :^] */
704 return -1;
705}
706
707static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
708{
4fabb60d
JM
709 NSVContext *nsv = s->priv_data;
710 AVStream *st = s->streams[stream_index];
711 NSVStream *nst = st->priv_data;
712 int index;
27d5f18f 713
4fabb60d
JM
714 index = av_index_search_timestamp(st, timestamp, flags);
715 if(index < 0)
716 return -1;
717
718 url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
719 nst->frame_offset = st->index_entries[index].timestamp;
720 nsv->state = NSV_UNSYNC;
721 return 0;
27d5f18f
FR
722}
723
724static int nsv_read_close(AVFormatContext *s)
725{
88730be6 726/* int i; */
27d5f18f
FR
727 NSVContext *nsv = s->priv_data;
728
4fabb60d
JM
729 av_freep(&nsv->nsvs_file_offset);
730 av_freep(&nsv->nsvs_timestamps);
1f6d0d42
JM
731 if (nsv->ahead[0].data)
732 av_free_packet(&nsv->ahead[0]);
733 if (nsv->ahead[1].data)
734 av_free_packet(&nsv->ahead[1]);
27d5f18f
FR
735
736#if 0
737
738 for(i=0;i<s->nb_streams;i++) {
739 AVStream *st = s->streams[i];
740 NSVStream *ast = st->priv_data;
741 if(ast){
742 av_free(ast->index_entries);
743 av_free(ast);
744 }
01f4895c 745 av_free(st->codec->palctrl);
27d5f18f
FR
746 }
747
748#endif
749 return 0;
750}
751
752static int nsv_probe(AVProbeData *p)
753{
754 int i;
61f4aa96 755// PRINT(("nsv_probe(), buf_size %d\n", p->buf_size));
27d5f18f 756 /* check file header */
27d5f18f
FR
757 /* streamed files might not have any header */
758 if (p->buf[0] == 'N' && p->buf[1] == 'S' &&
65a00bd6 759 p->buf[2] == 'V' && (p->buf[3] == 'f' || p->buf[3] == 's'))
27d5f18f
FR
760 return AVPROBE_SCORE_MAX;
761 /* XXX: do streamed files always start at chunk boundary ?? */
762 /* or do we need to search NSVs in the byte stream ? */
763 /* seems the servers don't bother starting clean chunks... */
764 /* sometimes even the first header is at 9KB or something :^) */
765 for (i = 1; i < p->buf_size - 3; i++) {
766 if (p->buf[i+0] == 'N' && p->buf[i+1] == 'S' &&
767 p->buf[i+2] == 'V' && p->buf[i+3] == 's')
768 return AVPROBE_SCORE_MAX-20;
769 }
770 /* so we'll have more luck on extension... */
ade5b91d 771 if (av_match_ext(p->filename, "nsv"))
ac5565d8 772 return AVPROBE_SCORE_MAX/2;
27d5f18f
FR
773 /* FIXME: add mime-type check */
774 return 0;
775}
776
ff70e601 777AVInputFormat nsv_demuxer = {
27d5f18f 778 "nsv",
517ac243 779 NULL_IF_CONFIG_SMALL("Nullsoft Streaming Video"),
27d5f18f
FR
780 sizeof(NSVContext),
781 nsv_probe,
782 nsv_read_header,
783 nsv_read_packet,
784 nsv_read_close,
785 nsv_read_seek,
786};