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
|
/* aKode: Speex-Decoder
Copyright (C) 2004 Allan Sandfeld Jensen <kde@carewolf.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "akodelib.h"
#ifdef HAVE_SPEEX
extern "C" {
#include <string.h>
#include <stdlib.h>
#include <speex.h>
#include <speex_header.h>
#include <speex_callbacks.h>
#include <speex_stereo.h>
#include <ogg/ogg.h>
}
#ifdef SPEEX_DEBUG
#include <iostream>
using std::cerr;
#endif
#include "file.h"
#include "audioframe.h"
#include "decoder.h"
#include "speex_decoder.h"
namespace aKode {
bool SpeexDecoderPlugin::canDecode(File* src) {
char header[36];
bool res = false;
src->openRO();
if (src->read(header, 36) == 36)
if (memcmp(header, "OggS",4) == 0 )
if (memcmp(header+28, "Speex ",8) == 0) res = true;
src->close();
return res;
}
extern "C" { SpeexDecoderPlugin speex_decoder; }
struct SpeexDecoder::private_data
{
SpeexBits bits;
SpeexMode *mode;
SpeexStereoState stereo;
ogg_sync_state sync;
ogg_stream_state stream;
ogg_page page; // current page
ogg_packet packet; // current packet
void *dec_state;
File *src;
#ifdef HAVE_SPEEX11
int16_t *out_buffer;
#else
float *out_buffer;
#endif
unsigned int bitrate;
int frame_size;
int frames_per_packet;
int frame_nr;
AudioConfiguration config;
int serialno;
long position;
bool seeked;
bool initialized;
bool error, eof;
};
SpeexDecoder::SpeexDecoder(File *src) {
m_data = new private_data;
m_data->src = src;
m_data->out_buffer = 0;
ogg_sync_init(&m_data->sync);
m_data->dec_state = 0;
SpeexStereoState initstereo = SPEEX_STEREO_STATE_INIT;
m_data->stereo = initstereo;
m_data->initialized = m_data->eof = m_data->error = false;
m_data->frame_nr = 100000;
m_data->position = 0;
m_data->seeked = false;
src->openRO();
src->fadvise();
}
SpeexDecoder::~SpeexDecoder() {
if (m_data->initialized) {
speex_bits_reset(&m_data->bits);
ogg_sync_clear(&m_data->sync);
ogg_stream_clear(&m_data->stream);
if (m_data->dec_state) speex_decoder_destroy(m_data->dec_state);
m_data->src->close();
delete[] m_data->out_buffer;
}
delete m_data;
}
bool SpeexDecoder::openFile() {
m_data->error = false;
while(ogg_sync_pageout(&m_data->sync, &m_data->page) != 1) {
char *buf = ogg_sync_buffer(&m_data->sync, 1024);
int read = m_data->src->read(buf, 1024);
if (read <= 0) {
m_data->error = true;
return false;
}
ogg_sync_wrote(&m_data->sync, read);
}
m_data->serialno = ogg_page_serialno(&m_data->page);
ogg_stream_init(&m_data->stream, m_data->serialno);
speex_bits_init(&m_data->bits);
// ogg_stream_pagein(&m_data->stream, &m_data->page);
//ogg_stream_packetout(&m_data->stream, &m_data->packet);
// ogg_stream_packetout(&m_data->stream, &m_data->packet);
if(!decodeHeader())
{
m_data->error = true;
return false;
}
m_data->initialized = true;
return true;
}
bool SpeexDecoder::readPage() {
while (ogg_sync_pageout(&m_data->sync, &m_data->page) != 1) {
char *buf = ogg_sync_buffer(&m_data->sync, 4096);
long read = m_data->src->read(buf, 4096);
if (read <= 0) return false;
ogg_sync_wrote(&m_data->sync, read);
}
ogg_stream_pagein(&m_data->stream, &m_data->page);
// m_data->packets = ogg_page_packets(&m_data->page);
return true;
}
bool SpeexDecoder::readPacket() {
bool res = true;
while (ogg_stream_packetpeek(&m_data->stream, &m_data->packet) != 1 && res) {
res = readPage();
}
ogg_stream_packetout(&m_data->stream, &m_data->packet);
speex_bits_read_from(&m_data->bits, (char*)m_data->packet.packet, m_data->packet.bytes);
m_data->frame_nr = 0;
return res;
}
bool SpeexDecoder::decodeHeader() {
SpeexHeader *header;
header = speex_packet_to_header((char*)m_data->page.body, m_data->page.body_len);
if (!header) {
// invalid file
m_data->error = true;
#ifdef SPEEX_DEBUG
std::cerr << "Invalid file\n";
#endif
return false;
}
SpeexMode *mode = ( SpeexMode* )speex_mode_list[ header->mode ];
m_data->mode = mode;
m_data->config.channels = header->nb_channels;
m_data->config.channel_config = MonoStereo;
m_data->frames_per_packet = header->frames_per_packet;
if (mode->bitstream_version != header->mode_bitstream_version) {
// incompatible bitstream
m_data->error = true;
return false;
}
m_data->dec_state = speex_decoder_init(mode);
speex_decoder_ctl(m_data->dec_state, SPEEX_GET_FRAME_SIZE, &m_data->frame_size);
//m_data->bitrate = header->bitrate;
speex_decoder_ctl(m_data->dec_state, SPEEX_GET_BITRATE, &m_data->bitrate);
m_data->config.sample_rate = header->rate;
m_data->config.sample_width = 16;
speex_decoder_ctl(m_data->dec_state, SPEEX_SET_SAMPLING_RATE, &m_data->config.sample_rate);
//speex_decoder_ctl(m_data->dec_state, SPEEX_GET_SAMPLING_RATE, &m_data->sample_rate);
// Use the perceptial enhancement, which gives a subjectively better result
// but is technically further from the source.
int i = 1;
speex_decoder_ctl(m_data->dec_state, SPEEX_SET_ENH, &i);
// Handle the patched-on stereo stuff
if (m_data->config.channels != 1) {
SpeexCallback callback;
callback.callback_id = SPEEX_INBAND_STEREO;
callback.func = speex_std_stereo_request_handler;
callback.data = &m_data->stereo;
speex_decoder_ctl(m_data->dec_state, SPEEX_SET_HANDLER, &callback);
}
#ifdef HAVE_SPEEX11
m_data->out_buffer = new int16_t[m_data->frame_size*m_data->config.channels];
#else
m_data->out_buffer = new float[m_data->frame_size*m_data->config.channels];
#endif
free(header);
return true;
}
bool SpeexDecoder::readFrame(AudioFrame* frame)
{
if (!m_data->initialized) openFile();
if (m_data->eof || m_data->error) return false;
if (m_data->frame_nr >= m_data->frames_per_packet) {
if (!readPacket()) {
m_data->eof = true;
return false;
}
}
#if defined(HAVE_SPEEX11) && !defined(BROKEN_SPEEX11)
speex_decode_int(m_data->dec_state, &m_data->bits, m_data->out_buffer);
#else
speex_decode(m_data->dec_state, &m_data->bits, m_data->out_buffer);
#endif
int channels = m_data->config.channels;
int length = m_data->frame_size;
frame->reserveSpace(&m_data->config, length);
if (m_data->config.channels == 2)
#if defined(HAVE_SPEEX11) && !defined(BROKEN_SPEEX11)
speex_decode_stereo_int(m_data->out_buffer, length, &m_data->stereo);
#else
speex_decode_stereo(m_data->out_buffer, length, &m_data->stereo);
#endif
for (int i=0; i<m_data->frame_size*m_data->config.channels; i++) {
if (m_data->out_buffer[i] > 32766) m_data->out_buffer[i] = 32767;
else
if (m_data->out_buffer[i] < -32767) m_data->out_buffer[i] = -32768;
else
m_data->out_buffer[i] = m_data->out_buffer[i];
};
// Decode into frame
int16_t** data = (int16_t**)frame->data;
for(int i=0; i<length; i++)
for(int j=0; j<channels; j++)
#if defined(HAVE_SPEEX11)
data[j][i] = m_data->out_buffer[i*channels+j];
#else
data[j][i] = (int16_t)(m_data->out_buffer[i*channels+j]+0.5);
#endif
m_data->position += m_data->frame_size;
frame->pos = position();
m_data->frame_nr++;
return true;
}
long SpeexDecoder::length() {
if (!m_data->bitrate || !m_data->initialized) return -1;
float spxlen = (8.0*m_data->src->length())/(float)m_data->bitrate;
return (long)(spxlen*1000.0);
}
long SpeexDecoder::position() {
if (!m_data->bitrate || !m_data->initialized) return -1;
float spxpos = ((float)m_data->position)/(float)m_data->config.sample_rate;
if (m_data->seeked) {
float tellpos = (8.0*m_data->src->position())/(float)m_data->bitrate;
// tellpos should always be somewhat ahead, if spxpos is worse use tellpos
if (tellpos < spxpos) {
spxpos = tellpos;
m_data->position = (long)(tellpos*m_data->config.sample_rate);
}
}
return (long)(spxpos*1000.0);
}
bool SpeexDecoder::eof() {
return m_data->eof || m_data->error;
/*return m_data->error || (m_data->src->eof() && m_data->frame_nr >= m_data->frames_per_packet); */
}
bool SpeexDecoder::error() {
return m_data->error;
}
bool SpeexDecoder::seekable() {
return m_data->src->seekable();
}
bool SpeexDecoder::seek(long pos) {
if(!m_data->initialized) return false;
long bpos = (long)(((float)pos*(float)m_data->bitrate)/8000.0);
if (m_data->src->seek(bpos)) {
speex_bits_reset(&m_data->bits);
ogg_sync_reset(&m_data->sync);
ogg_stream_reset(&m_data->stream);
readPage();
readPacket();
// We should now have read in a whole new page
bpos = (m_data->src->position()-m_data->page.body_len);
m_data->position = (long)((bpos*8.0*m_data->config.sample_rate)/(float)m_data->bitrate);
m_data->seeked = true;
return true;
}
return false;
}
const AudioConfiguration* SpeexDecoder::audioConfiguration() {
return &m_data->config;
}
} // namespace
#endif // HAVE_SPEEX
|