forked from sdlpal/sdlpal
-
Notifications
You must be signed in to change notification settings - Fork 0
/
oggplay.c
516 lines (459 loc) · 14.4 KB
/
oggplay.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
/* -*- mode: c; tab-width: 4; c-basic-offset: 4; c-file-style: "linux" -*- */
//
// Copyright (c) 2009-2011, Wei Mingzhi <[email protected]>.
// Copyright (c) 2011-2022, SDLPAL development team.
// All rights reserved.
//
// This file is part of SDLPAL.
//
// SDLPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// oggplay.h: Player of OGG files.
// @Author: Lou Yihua <[email protected]>, 2015-07-28.
//
#include "util.h"
#include "global.h"
#include "palcfg.h"
#include "players.h"
#include "audio.h"
#include <math.h>
#if PAL_HAS_OGG
#define OV_EXCLUDE_STATIC_CALLBACKS
#include <vorbis/vorbisfile.h>
#include "resampler.h"
#define FLAG_OY 0x01
#define FLAG_VI 0x02
#define FLAG_VC 0x04
#define FLAG_OS 0x08
#define FLAG_VD 0x10
#define FLAG_VB 0x20
#define STAGE_PAGEOUT 1
#define STAGE_PACKETOUT 2
#define STAGE_PCMOUT 3
#define STAGE_REWIND 4
#define OGG_BUFFER_LENGTH 4096
typedef struct tagOGGPLAYER
{
AUDIOPLAYER_COMMONS;
ogg_sync_state oy; /* sync and verify incoming physical bitstream */
ogg_stream_state os; /* take physical pages, weld into a logical stream of packets */
ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */
vorbis_info vi; /* struct that stores all the static vorbis bitstream settings */
vorbis_comment vc; /* struct that stores all the bitstream user comments */
vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
vorbis_block vb; /* local working space for packet->PCM decode */
FILE *fp;
void *resampler[2];
INT iFlags;
INT iStage;
INT nChannels;
BOOL fReady;
BOOL fUseResampler;
} OGGPLAYER, *LPOGGPLAYER;
PAL_FORCE_INLINE ogg_int16_t OGG_GetSample(float pcm)
{
int val = (int)(floor(pcm * 32767.f + .5f));
/* might as well guard against clipping */
if (val > 32767) {
val = 32767;
}
else if (val < -32768) {
val = -32768;
}
return (ogg_int16_t)val;
}
PAL_FORCE_INLINE void OGG_FillResample(LPOGGPLAYER player, ogg_int16_t* stream)
{
if (gConfig.iAudioChannels == 2) {
stream[0] = resampler_get_and_remove_sample(player->resampler[0]);
stream[1] = (player->vi.channels > 1) ? resampler_get_and_remove_sample(player->resampler[1]) : stream[0];
}
else {
if (player->vi.channels > 1) {
*stream = (short)((int)(resampler_get_and_remove_sample(player->resampler[0]) + resampler_get_and_remove_sample(player->resampler[1])) >> 1);
}
else {
*stream = resampler_get_and_remove_sample(player->resampler[0]);
}
}
}
static void OGG_Cleanup(LPOGGPLAYER player)
{
int i;
for (i = 0; i < gConfig.iAudioChannels; i++) resampler_clear(player->resampler[0]);
/* Do various cleanups */
if (player->iFlags & FLAG_VB) vorbis_block_clear(&player->vb);
if (player->iFlags & FLAG_VD) vorbis_dsp_clear(&player->vd);
if (player->iFlags & FLAG_OS) ogg_stream_clear(&player->os);
if (player->iFlags & FLAG_VC) vorbis_comment_clear(&player->vc);
if (player->iFlags & FLAG_VI) vorbis_info_clear(&player->vi); /* must be called last */
if (player->iFlags & FLAG_OY) ogg_sync_clear(&player->oy);
player->iFlags = player->iStage = 0;
player->fReady = FALSE;
}
static BOOL OGG_Rewind(LPOGGPLAYER player)
{
ogg_packet op; /* one raw packet of data for decode */
char *buffer;
int i, bytes;
OGG_Cleanup(player);
fseek(player->fp, 0, SEEK_SET);
ogg_sync_init(&player->oy); player->iFlags = FLAG_OY;
/* grab some data at the head of the stream. We want the first page
(which is guaranteed to be small and only contain the Vorbis
stream initial header) We need the first page to get the stream
serialno. */
/* submit a 4k block to libvorbis' Ogg layer */
buffer = ogg_sync_buffer(&player->oy, OGG_BUFFER_LENGTH);
bytes = fread(buffer, 1, OGG_BUFFER_LENGTH, player->fp);
ogg_sync_wrote(&player->oy, bytes);
/* Get the first page. */
if (ogg_sync_pageout(&player->oy, &player->og) != 1) {
/* have we simply run out of data? If so, we're done. */
/* error case. Must not be Vorbis data */
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
/* Get the serial number and set up the rest of decode. */
/* serialno first; use it to set up a logical stream */
ogg_stream_init(&player->os, ogg_page_serialno(&player->og));
player->iFlags |= FLAG_OS;
/* extract the initial header from the first page and verify that the
Ogg bitstream is in fact Vorbis data */
/* I handle the initial header first instead of just having the code
read all three Vorbis headers at once because reading the initial
header is an easy way to identify a Vorbis bitstream and it's
useful to see that functionality seperated out. */
vorbis_info_init(&player->vi); player->iFlags |= FLAG_VI;
vorbis_comment_init(&player->vc); player->iFlags |= FLAG_VC;
if (ogg_stream_pagein(&player->os, &player->og)<0) {
/* error; stream version mismatch perhaps */
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
if (ogg_stream_packetout(&player->os, &op) != 1) {
/* no page? must not be vorbis */
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
if (vorbis_synthesis_headerin(&player->vi, &player->vc, &op)<0) {
/* error case; not a vorbis header */
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
/* At this point, we're sure we're Vorbis. We've set up the logical
(Ogg) bitstream decoder. Get the comment and codebook headers and
set up the Vorbis decoder */
/* The next two packets in order are the comment and codebook headers.
They're likely large and may span multiple pages. Thus we read
and submit data until we get our two packets, watching that no
pages are missing. If a page is missing, error out; losing a
header page is the only place where missing data is fatal. */
i = 0;
while (i < 2) {
while (i < 2) {
int result = ogg_sync_pageout(&player->oy, &player->og);
if (result == 0)break; /* Need more data */
/* Don't complain about missing or corrupt data yet. We'll
catch it at the packet output phase */
if (result == 1) {
ogg_stream_pagein(&player->os, &player->og); /* we can ignore any errors here
as they'll also become apparent
at packetout */
while (i < 2) {
result = ogg_stream_packetout(&player->os, &op);
if (result == 0)break;
if (result < 0) {
/* Uh oh; data at some point was corrupted or missing!
We can't tolerate that in a header. Die. */
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
result = vorbis_synthesis_headerin(&player->vi, &player->vc, &op);
if (result < 0) {
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
i++;
}
}
}
/* no harm in not checking before adding more */
buffer = ogg_sync_buffer(&player->oy, OGG_BUFFER_LENGTH);
bytes = fread(buffer, 1, OGG_BUFFER_LENGTH, player->fp);
if (bytes == 0 && i < 2) {
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
ogg_sync_wrote(&player->oy, bytes);
}
if (vorbis_synthesis_init(&player->vd, &player->vi) == 0) { /* central decode state */
vorbis_block_init(&player->vd, &player->vb); /* local state for most of the decode
so multiple block decodes can
proceed in parallel. We could init
multiple vorbis_block structures
for vd here */
player->iStage = STAGE_PAGEOUT;
player->iFlags |= FLAG_VD | FLAG_VB;
player->fUseResampler = (player->vi.rate != gConfig.iSampleRate);
if (player->fUseResampler) {
double factor = (double)player->vi.rate / (double)gConfig.iSampleRate;
for (i = 0; i < min(player->vi.channels, 2); i++)
{
resampler_set_quality(player->resampler[i], AUDIO_IsIntegerConversion(player->vi.rate) ? RESAMPLER_QUALITY_MIN : gConfig.iResampleQuality);
resampler_set_rate(player->resampler[i], factor);
resampler_clear(player->resampler[i]);
}
}
return (player->fReady = TRUE);
}
else {
OGG_Cleanup(player);
return (player->fReady = FALSE);
}
}
static VOID
OGG_FillBuffer(
VOID *object,
LPBYTE stream,
INT len
)
{
LPOGGPLAYER player = (LPOGGPLAYER)object;
if (player->fReady) {
ogg_packet op; /* one raw packet of data for decode */
int total_bytes = 0, stage = player->iStage;
while (total_bytes < len) {
float **pcm;
int samples, result;
switch (stage)
{
case STAGE_PAGEOUT: /* PAGEOUT stage */
result = ogg_sync_pageout(&player->oy, &player->og);
if (result > 0) {
/* can safely ignore errors at this point */
ogg_stream_pagein(&player->os, &player->og);
stage = STAGE_PACKETOUT;
}
else {
if (result == 0) { /* need more data */
char *buffer = ogg_sync_buffer(&player->oy, OGG_BUFFER_LENGTH);
int bytes = fread(buffer, 1, OGG_BUFFER_LENGTH, player->fp);
ogg_sync_wrote(&player->oy, bytes);
stage = (bytes > 0) ? STAGE_PAGEOUT : STAGE_REWIND;
}
break;
}
case STAGE_PACKETOUT:
result = ogg_stream_packetout(&player->os, &op);
if (result > 0) {
/* we have a packet. Decode it */
if (vorbis_synthesis(&player->vb, &op) == 0) { /* test for success! */
vorbis_synthesis_blockin(&player->vd, &player->vb);
}
stage = STAGE_PCMOUT;
}
else {
if (result == 0) { /* need more data */
if (ogg_page_eos(&player->og)) {
if (player->fLoop) {
stage = STAGE_REWIND;
}
else {
OGG_Cleanup(player);
UTIL_CloseFile(player->fp);
player->fp = NULL;
return;
}
}
else {
stage = STAGE_PAGEOUT;
}
}
break;
}
case STAGE_PCMOUT:
if ((samples = vorbis_synthesis_pcmout(&player->vd, &pcm)) > 0) {
int bout;
if (player->fUseResampler) { /* Resampler is available and should be used */
bout = 0;
while (total_bytes < len && samples > 0) { /* Fill as many samples into resampler as possible */
int i, j, to_write = resampler_get_free_count(player->resampler[0]);
if (to_write > 0) {
if (to_write >= samples) to_write = samples;
for (i = 0; i < min(player->vi.channels, 2); i++) {
float *mono = pcm[i] + bout;
for (j = 0; j < to_write; j++) {
resampler_write_sample(player->resampler[i], OGG_GetSample(mono[j]));
}
}
}
/* Fetch resampled samples if available */
j = resampler_get_sample_count(player->resampler[0]);
while (total_bytes < len && resampler_get_sample_count(player->resampler[0]) > 0) {
OGG_FillResample(player, (ogg_int16_t *)(stream + total_bytes));
total_bytes += gConfig.iAudioChannels * sizeof(ogg_int16_t);
}
samples -= to_write; bout += to_write;
}
}
else {
int i;
ogg_int16_t *ptr = (ogg_int16_t *)(stream + total_bytes);
bout = (len - total_bytes) / gConfig.iAudioChannels / sizeof(ogg_int16_t);
if (bout > samples) bout = samples;
for (i = 0; i < bout; i++) {
if (gConfig.iAudioChannels == 2) {
ptr[0] = OGG_GetSample(pcm[0][i]);
ptr[1] = (player->vi.channels > 1) ? OGG_GetSample(pcm[1][i]) : ptr[0];
}
else {
if (player->vi.channels > 1) {
ptr[0] = (short)((int)(OGG_GetSample(pcm[0][i]) + OGG_GetSample(pcm[1][i])) >> 1);
}
else {
ptr[0] = OGG_GetSample(pcm[0][i]);
}
}
ptr += gConfig.iAudioChannels;
}
total_bytes += bout * gConfig.iAudioChannels * sizeof(ogg_int16_t);
}
/* tell libvorbis how many samples we actually consumed */
vorbis_synthesis_read(&player->vd, bout);
}
else {
stage = STAGE_PACKETOUT;
}
break;
case STAGE_REWIND:
if (player->vi.rate != gConfig.iSampleRate) { /* If there are samples in the resampler, fetch them first */
while (total_bytes < len && resampler_get_sample_count(player->resampler[0]) > 0) {
OGG_FillResample(player, (ogg_int16_t *)(stream + total_bytes));
total_bytes += gConfig.iAudioChannels * sizeof(ogg_int16_t);
}
/* Break out if there are still samples in the resampler */
if (resampler_get_sample_count(player->resampler[0]) > 0) break;
}
OGG_Rewind(player);
stage = player->iStage;
break;
default:
return;
}
}
player->iStage = stage;
}
}
static BOOL
OGG_Play(
VOID *object,
INT iNum,
BOOL fLoop,
FLOAT flFadeTime
)
{
LPOGGPLAYER player = (LPOGGPLAYER)object;
//
// Check for NULL pointer.
//
if (player == NULL)
{
return FALSE;
}
player->fLoop = fLoop;
if (iNum == player->iMusic)
{
return TRUE;
}
player->fReady = FALSE;
OGG_Cleanup(player);
if (player->fp)
{
UTIL_CloseFile(player->fp);
player->fp = NULL;
}
player->iMusic = iNum;
if (iNum == -1)
{
return TRUE;
}
player->fp = UTIL_OpenFile(PAL_va(0, "ogg%s%.2d.ogg", PAL_NATIVE_PATH_SEPARATOR, iNum));
if (player->fp == NULL)
{
return FALSE;
}
if (!OGG_Rewind(player))
{
UTIL_CloseFile(player->fp);
player->fp = NULL;
return FALSE;
}
return TRUE;
}
static VOID
OGG_Shutdown(
VOID *object
)
{
if (object)
{
LPOGGPLAYER player = (LPOGGPLAYER)object;
OGG_Cleanup(player);
resampler_delete(player->resampler[0]);
resampler_delete(player->resampler[1]);
UTIL_CloseFile(player->fp);
free(player);
}
}
LPAUDIOPLAYER
OGG_Init(
VOID
)
{
LPOGGPLAYER player;
if ((player = (LPOGGPLAYER)malloc(sizeof(OGGPLAYER))) != NULL)
{
memset(player, 0, sizeof(OGGPLAYER));
player->FillBuffer = OGG_FillBuffer;
player->Play = OGG_Play;
player->Shutdown = OGG_Shutdown;
player->fp = NULL;
player->iMusic = -1;
player->iFlags = 0;
player->iStage = 0;
player->fLoop = FALSE;
player->fReady = FALSE;
player->fUseResampler = FALSE;
player->resampler[0] = resampler_create();
if (player->resampler[0])
{
player->resampler[1] = resampler_create();
if (player->resampler[1] == NULL)
{
resampler_delete(player->resampler[0]);
player->resampler[0] = NULL;
}
}
}
return (LPAUDIOPLAYER)player;
}
#else
LPAUDIOPLAYER
OGG_Init(
VOID
)
{
return NULL;
}
#endif