1 /* libxmms-flac - XMMS FLAC input plugin
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program 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
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include "plugin.h"
25
26 #include <limits.h>
27 #include <pthread.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <stdio.h>
31 #include <glib.h>
32 #include <pwd.h>
33 #include <sys/types.h>
34 #include <unistd.h>
35
36 #include <xmms/plugin.h>
37 #include <xmms/util.h>
38 #include <xmms/configfile.h>
39 #include <xmms/titlestring.h>
40
41 #ifdef HAVE_LANGINFO_CODESET
42 #include <langinfo.h>
43 #endif
44
45 #include "FLAC/all.h"
46 #include "plugin_common/all.h"
47 #include "share/grabbag.h"
48 #include "share/replaygain_synthesis.h"
49 #include "configure.h"
50 #include "charset.h"
51 #include "http.h"
52 #include "tag.h"
53
54 #ifdef min
55 #undef min
56 #endif
57 #define min(x,y) ((x)<(y)?(x):(y))
58
59 extern void FLAC_XMMS__file_info_box(char *filename);
60
61 typedef struct {
62 FLAC__bool abort_flag;
63 FLAC__bool is_playing;
64 FLAC__bool is_http_source;
65 FLAC__bool eof;
66 FLAC__bool play_thread_open; /* if true, is_playing must also be true */
67 FLAC__uint64 total_samples;
68 uint32_t bits_per_sample;
69 uint32_t channels;
70 uint32_t sample_rate;
71 int length_in_msec; /* int (instead of FLAC__uint64) only because that's what XMMS uses; seeking won't work right if this maxes out */
72 gchar *title;
73 AFormat sample_format;
74 uint32_t sample_format_bytes_per_sample;
75 int seek_to_in_sec;
76 FLAC__bool has_replaygain;
77 double replay_scale;
78 DitherContext dither_context;
79 } stream_data_struct;
80
81 static void FLAC_XMMS__init(void);
82 static int FLAC_XMMS__is_our_file(char *filename);
83 static void FLAC_XMMS__play_file(char *filename);
84 static void FLAC_XMMS__stop(void);
85 static void FLAC_XMMS__pause(short p);
86 static void FLAC_XMMS__seek(int time);
87 static int FLAC_XMMS__get_time(void);
88 static void FLAC_XMMS__cleanup(void);
89 static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
90
91 static void *play_loop_(void *arg);
92
93 static FLAC__bool safe_decoder_init_(const char *filename, FLAC__StreamDecoder *decoder);
94 static void safe_decoder_finish_(FLAC__StreamDecoder *decoder);
95 static void safe_decoder_delete_(FLAC__StreamDecoder *decoder);
96
97 static FLAC__StreamDecoderReadStatus http_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
98 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
99 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
100 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
101
102 InputPlugin flac_ip =
103 {
104 NULL,
105 NULL,
106 "FLAC Player v" VERSION,
107 FLAC_XMMS__init,
108 FLAC_XMMS__aboutbox,
109 FLAC_XMMS__configure,
110 FLAC_XMMS__is_our_file,
111 NULL,
112 FLAC_XMMS__play_file,
113 FLAC_XMMS__stop,
114 FLAC_XMMS__pause,
115 FLAC_XMMS__seek,
116 NULL,
117 FLAC_XMMS__get_time,
118 NULL,
119 NULL,
120 FLAC_XMMS__cleanup,
121 NULL,
122 NULL,
123 NULL,
124 NULL,
125 FLAC_XMMS__get_song_info,
126 FLAC_XMMS__file_info_box,
127 NULL
128 };
129
130 #define SAMPLES_PER_WRITE 512
131 #define SAMPLE_BUFFER_SIZE ((FLAC__MAX_BLOCK_SIZE + SAMPLES_PER_WRITE) * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8))
132 static FLAC__byte sample_buffer_[SAMPLE_BUFFER_SIZE];
133 static uint32_t sample_buffer_first_, sample_buffer_last_;
134
135 static FLAC__StreamDecoder *decoder_ = 0;
136 static stream_data_struct stream_data_;
137 static pthread_t decode_thread_;
138 static FLAC__bool audio_error_ = false;
139 static FLAC__bool is_big_endian_host_;
140
141 #define BITRATE_HIST_SEGMENT_MSEC 500
142 /* 500ms * 50 = 25s should be enough */
143 #define BITRATE_HIST_SIZE 50
144 static uint32_t bitrate_history_[BITRATE_HIST_SIZE];
145
146
get_iplugin_info(void)147 FLAC_API InputPlugin *get_iplugin_info(void)
148 {
149 flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
150 return &flac_ip;
151 }
152
set_track_info(const char * title,int length_in_msec)153 void set_track_info(const char* title, int length_in_msec)
154 {
155 if (stream_data_.is_playing) {
156 flac_ip.set_info((char*) title, length_in_msec, stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample, stream_data_.sample_rate, stream_data_.channels);
157 }
158 }
159
homedir(void)160 static gchar* homedir(void)
161 {
162 gchar *result;
163 char *env_home = getenv("HOME");
164 if (env_home) {
165 result = g_strdup (env_home);
166 } else {
167 uid_t uid = getuid();
168 struct passwd *pwent;
169 do {
170 pwent = getpwent();
171 } while (pwent && pwent->pw_uid != uid);
172 result = pwent ? g_strdup (pwent->pw_dir) : NULL;
173 endpwent();
174 }
175 return result;
176 }
177
is_http_source(const char * source)178 static FLAC__bool is_http_source(const char *source)
179 {
180 return 0 == strncasecmp(source, "http://", 7);
181 }
182
FLAC_XMMS__init(void)183 void FLAC_XMMS__init(void)
184 {
185 ConfigFile *cfg;
186 FLAC__uint32 test = 1;
187
188 is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
189
190 flac_cfg.title.tag_override = FALSE;
191 if (flac_cfg.title.tag_format)
192 g_free(flac_cfg.title.tag_format);
193 flac_cfg.title.convert_char_set = FALSE;
194
195 cfg = xmms_cfg_open_default_file();
196
197 /* title */
198
199 xmms_cfg_read_boolean(cfg, "flac", "title.tag_override", &flac_cfg.title.tag_override);
200
201 if(!xmms_cfg_read_string(cfg, "flac", "title.tag_format", &flac_cfg.title.tag_format))
202 flac_cfg.title.tag_format = g_strdup("%p - %t");
203
204 xmms_cfg_read_boolean(cfg, "flac", "title.convert_char_set", &flac_cfg.title.convert_char_set);
205
206 if(!xmms_cfg_read_string(cfg, "flac", "title.user_char_set", &flac_cfg.title.user_char_set))
207 flac_cfg.title.user_char_set = FLAC_plugin__charset_get_current();
208
209 /* replaygain */
210
211 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.enable", &flac_cfg.output.replaygain.enable);
212
213 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.album_mode", &flac_cfg.output.replaygain.album_mode);
214
215 if(!xmms_cfg_read_int(cfg, "flac", "output.replaygain.preamp", &flac_cfg.output.replaygain.preamp))
216 flac_cfg.output.replaygain.preamp = 0;
217
218 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.hard_limit", &flac_cfg.output.replaygain.hard_limit);
219
220 xmms_cfg_read_boolean(cfg, "flac", "output.resolution.normal.dither_24_to_16", &flac_cfg.output.resolution.normal.dither_24_to_16);
221 xmms_cfg_read_boolean(cfg, "flac", "output.resolution.replaygain.dither", &flac_cfg.output.resolution.replaygain.dither);
222
223 if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.noise_shaping", &flac_cfg.output.resolution.replaygain.noise_shaping))
224 flac_cfg.output.resolution.replaygain.noise_shaping = 1;
225
226 if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.bps_out", &flac_cfg.output.resolution.replaygain.bps_out))
227 flac_cfg.output.resolution.replaygain.bps_out = 16;
228
229 /* stream */
230
231 xmms_cfg_read_int(cfg, "flac", "stream.http_buffer_size", &flac_cfg.stream.http_buffer_size);
232 xmms_cfg_read_int(cfg, "flac", "stream.http_prebuffer", &flac_cfg.stream.http_prebuffer);
233 xmms_cfg_read_boolean(cfg, "flac", "stream.use_proxy", &flac_cfg.stream.use_proxy);
234 if(flac_cfg.stream.proxy_host)
235 g_free(flac_cfg.stream.proxy_host);
236 if(!xmms_cfg_read_string(cfg, "flac", "stream.proxy_host", &flac_cfg.stream.proxy_host))
237 flac_cfg.stream.proxy_host = g_strdup("");
238 xmms_cfg_read_int(cfg, "flac", "stream.proxy_port", &flac_cfg.stream.proxy_port);
239 xmms_cfg_read_boolean(cfg, "flac", "stream.proxy_use_auth", &flac_cfg.stream.proxy_use_auth);
240 if(flac_cfg.stream.proxy_user)
241 g_free(flac_cfg.stream.proxy_user);
242 flac_cfg.stream.proxy_user = NULL;
243 xmms_cfg_read_string(cfg, "flac", "stream.proxy_user", &flac_cfg.stream.proxy_user);
244 if(flac_cfg.stream.proxy_pass)
245 g_free(flac_cfg.stream.proxy_pass);
246 flac_cfg.stream.proxy_pass = NULL;
247 xmms_cfg_read_string(cfg, "flac", "stream.proxy_pass", &flac_cfg.stream.proxy_pass);
248 xmms_cfg_read_boolean(cfg, "flac", "stream.save_http_stream", &flac_cfg.stream.save_http_stream);
249 if (flac_cfg.stream.save_http_path)
250 g_free (flac_cfg.stream.save_http_path);
251 if (!xmms_cfg_read_string(cfg, "flac", "stream.save_http_path", &flac_cfg.stream.save_http_path) || ! *flac_cfg.stream.save_http_path) {
252 if (flac_cfg.stream.save_http_path)
253 g_free (flac_cfg.stream.save_http_path);
254 flac_cfg.stream.save_http_path = homedir();
255 }
256 xmms_cfg_read_boolean(cfg, "flac", "stream.cast_title_streaming", &flac_cfg.stream.cast_title_streaming);
257 xmms_cfg_read_boolean(cfg, "flac", "stream.use_udp_channel", &flac_cfg.stream.use_udp_channel);
258
259 decoder_ = FLAC__stream_decoder_new();
260
261 xmms_cfg_free(cfg);
262 }
263
FLAC_XMMS__is_our_file(char * filename)264 int FLAC_XMMS__is_our_file(char *filename)
265 {
266 char *ext;
267
268 ext = strrchr(filename, '.');
269 if(ext)
270 if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
271 return 1;
272 return 0;
273 }
274
FLAC_XMMS__play_file(char * filename)275 void FLAC_XMMS__play_file(char *filename)
276 {
277 FILE *f;
278
279 sample_buffer_first_ = sample_buffer_last_ = 0;
280 audio_error_ = false;
281 stream_data_.abort_flag = false;
282 stream_data_.is_playing = false;
283 stream_data_.is_http_source = is_http_source(filename);
284 stream_data_.eof = false;
285 stream_data_.play_thread_open = false;
286 stream_data_.has_replaygain = false;
287
288 if(!is_http_source(filename)) {
289 if(0 == (f = fopen(filename, "r")))
290 return;
291 fclose(f);
292 }
293
294 if(decoder_ == 0)
295 return;
296
297 if(!safe_decoder_init_(filename, decoder_))
298 return;
299
300 if(stream_data_.has_replaygain && flac_cfg.output.replaygain.enable) {
301 if(flac_cfg.output.resolution.replaygain.bps_out == 8) {
302 stream_data_.sample_format = FMT_U8;
303 stream_data_.sample_format_bytes_per_sample = 1;
304 }
305 else if(flac_cfg.output.resolution.replaygain.bps_out == 16) {
306 stream_data_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE;
307 stream_data_.sample_format_bytes_per_sample = 2;
308 }
309 else {
310 /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
311 fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", flac_cfg.output.resolution.replaygain.bps_out);
312 safe_decoder_finish_(decoder_);
313 return;
314 }
315 }
316 else {
317 if(stream_data_.bits_per_sample == 8) {
318 stream_data_.sample_format = FMT_U8;
319 stream_data_.sample_format_bytes_per_sample = 1;
320 }
321 else if(stream_data_.bits_per_sample == 16 || (stream_data_.bits_per_sample == 24 && flac_cfg.output.resolution.normal.dither_24_to_16)) {
322 stream_data_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE;
323 stream_data_.sample_format_bytes_per_sample = 2;
324 }
325 else {
326 /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
327 fprintf(stderr, "libxmms-flac: can't handle %u bit output\n", stream_data_.bits_per_sample);
328 safe_decoder_finish_(decoder_);
329 return;
330 }
331 }
332 FLAC__replaygain_synthesis__init_dither_context(&stream_data_.dither_context, stream_data_.sample_format_bytes_per_sample * 8, flac_cfg.output.resolution.replaygain.noise_shaping);
333 stream_data_.is_playing = true;
334
335 if(flac_ip.output->open_audio(stream_data_.sample_format, stream_data_.sample_rate, stream_data_.channels) == 0) {
336 audio_error_ = true;
337 safe_decoder_finish_(decoder_);
338 return;
339 }
340
341 stream_data_.title = flac_format_song_title(filename);
342 flac_ip.set_info(stream_data_.title, stream_data_.length_in_msec, stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample, stream_data_.sample_rate, stream_data_.channels);
343
344 stream_data_.seek_to_in_sec = -1;
345 stream_data_.play_thread_open = true;
346 pthread_create(&decode_thread_, NULL, play_loop_, NULL);
347 }
348
FLAC_XMMS__stop(void)349 void FLAC_XMMS__stop(void)
350 {
351 if(stream_data_.is_playing) {
352 stream_data_.is_playing = false;
353 if(stream_data_.play_thread_open) {
354 stream_data_.play_thread_open = false;
355 pthread_join(decode_thread_, NULL);
356 }
357 flac_ip.output->close_audio();
358 safe_decoder_finish_(decoder_);
359 }
360 }
361
FLAC_XMMS__pause(short p)362 void FLAC_XMMS__pause(short p)
363 {
364 flac_ip.output->pause(p);
365 }
366
FLAC_XMMS__seek(int time)367 void FLAC_XMMS__seek(int time)
368 {
369 if(!stream_data_.is_http_source) {
370 stream_data_.seek_to_in_sec = time;
371 stream_data_.eof = false;
372
373 while(stream_data_.seek_to_in_sec != -1)
374 xmms_usleep(10000);
375 }
376 }
377
FLAC_XMMS__get_time(void)378 int FLAC_XMMS__get_time(void)
379 {
380 if(audio_error_)
381 return -2;
382 if(!stream_data_.is_playing || (stream_data_.eof && !flac_ip.output->buffer_playing()))
383 return -1;
384 else
385 return flac_ip.output->output_time();
386 }
387
FLAC_XMMS__cleanup(void)388 void FLAC_XMMS__cleanup(void)
389 {
390 safe_decoder_delete_(decoder_);
391 decoder_ = 0;
392 }
393
FLAC_XMMS__get_song_info(char * filename,char ** title,int * length_in_msec)394 void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
395 {
396 FLAC__StreamMetadata streaminfo;
397
398 if(0 == filename)
399 filename = "";
400
401 if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
402 /* @@@ how to report the error? */
403 if(title) {
404 if (!is_http_source(filename)) {
405 static const char *errtitle = "Invalid FLAC File: ";
406 if(strlen(errtitle) + 1 + strlen(filename) + 1 + 1 < strlen(filename)) { /* overflow check */
407 *title = NULL;
408 }
409 else {
410 size_t len = strlen(errtitle) + 1 + strlen(filename) + 1 + 1;
411 *title = g_malloc(len);
412 flac_snprintf(*title, len, "%s\"%s\"", errtitle, filename);
413 }
414 } else {
415 *title = NULL;
416 }
417 }
418 if(length_in_msec)
419 *length_in_msec = -1;
420 return;
421 }
422
423 if(title) {
424 *title = flac_format_song_title(filename);
425 }
426 if(length_in_msec) {
427 FLAC__uint64 l = (FLAC__uint64)((double)streaminfo.data.stream_info.total_samples / (double)streaminfo.data.stream_info.sample_rate * 1000.0 + 0.5);
428 if (l > INT_MAX)
429 l = INT_MAX;
430 *length_in_msec = (int)l;
431 }
432 }
433
434 /***********************************************************************
435 * local routines
436 **********************************************************************/
437
play_loop_(void * arg)438 void *play_loop_(void *arg)
439 {
440 uint32_t written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE, blocksize = 1;
441 FLAC__uint64 decode_position_last = 0, decode_position_frame_last = 0, decode_position_frame = 0;
442
443 (void)arg;
444
445 while(stream_data_.is_playing) {
446 if(!stream_data_.eof) {
447 while(sample_buffer_last_ - sample_buffer_first_ < SAMPLES_PER_WRITE) {
448 uint32_t s;
449
450 s = sample_buffer_last_ - sample_buffer_first_;
451 if(FLAC__stream_decoder_get_state(decoder_) == FLAC__STREAM_DECODER_END_OF_STREAM) {
452 stream_data_.eof = true;
453 break;
454 }
455 else if(!FLAC__stream_decoder_process_single(decoder_)) {
456 /*@@@ this should probably be a dialog */
457 fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n");
458 stream_data_.eof = true;
459 break;
460 }
461 blocksize = sample_buffer_last_ - sample_buffer_first_ - s;
462 decode_position_frame_last = decode_position_frame;
463 if(stream_data_.is_http_source || !FLAC__stream_decoder_get_decode_position(decoder_, &decode_position_frame))
464 decode_position_frame = 0;
465 }
466 if(sample_buffer_last_ - sample_buffer_first_ > 0) {
467 const uint32_t n = min(sample_buffer_last_ - sample_buffer_first_, SAMPLES_PER_WRITE);
468 int bytes = n * stream_data_.channels * stream_data_.sample_format_bytes_per_sample;
469 FLAC__byte *sample_buffer_start = sample_buffer_ + sample_buffer_first_ * stream_data_.channels * stream_data_.sample_format_bytes_per_sample;
470 uint32_t written_time, bh_index_w;
471 FLAC__uint64 decode_position;
472
473 sample_buffer_first_ += n;
474 flac_ip.add_vis_pcm(flac_ip.output->written_time(), stream_data_.sample_format, stream_data_.channels, bytes, sample_buffer_start);
475 while(flac_ip.output->buffer_free() < (int)bytes && stream_data_.is_playing && stream_data_.seek_to_in_sec == -1)
476 xmms_usleep(10000);
477 if(stream_data_.is_playing && stream_data_.seek_to_in_sec == -1)
478 flac_ip.output->write_audio(sample_buffer_start, bytes);
479
480 /* compute current bitrate */
481
482 written_time = flac_ip.output->written_time();
483 bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
484 if(bh_index_w != bh_index_last_w) {
485 bh_index_last_w = bh_index_w;
486 decode_position = decode_position_frame - (double)(sample_buffer_last_ - sample_buffer_first_) * (double)(decode_position_frame - decode_position_frame_last) / (double)blocksize;
487 bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] =
488 decode_position > decode_position_last && written_time > written_time_last ?
489 8000 * (decode_position - decode_position_last) / (written_time - written_time_last) :
490 stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample;
491 decode_position_last = decode_position;
492 written_time_last = written_time;
493 }
494 }
495 else {
496 stream_data_.eof = true;
497 xmms_usleep(10000);
498 }
499 }
500 else
501 xmms_usleep(10000);
502 if(!stream_data_.is_http_source && stream_data_.seek_to_in_sec != -1) {
503 const double distance = (double)stream_data_.seek_to_in_sec * 1000.0 / (double)stream_data_.length_in_msec;
504 FLAC__uint64 target_sample = (FLAC__uint64)(distance * (double)stream_data_.total_samples);
505 if(stream_data_.total_samples > 0 && target_sample >= stream_data_.total_samples)
506 target_sample = stream_data_.total_samples - 1;
507 if(FLAC__stream_decoder_seek_absolute(decoder_, target_sample)) {
508 flac_ip.output->flush(stream_data_.seek_to_in_sec * 1000);
509 bh_index_last_w = bh_index_last_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
510 if(!FLAC__stream_decoder_get_decode_position(decoder_, &decode_position_frame))
511 decode_position_frame = 0;
512 stream_data_.eof = false;
513 sample_buffer_first_ = sample_buffer_last_ = 0;
514 }
515 else if(FLAC__stream_decoder_get_state(decoder_) == FLAC__STREAM_DECODER_SEEK_ERROR) {
516 /*@@@ this should probably be a dialog */
517 fprintf(stderr, "libxmms-flac: SEEK ERROR\n");
518 FLAC__stream_decoder_flush(decoder_);
519 stream_data_.eof = false;
520 sample_buffer_first_ = sample_buffer_last_ = 0;
521 }
522 stream_data_.seek_to_in_sec = -1;
523 }
524 else {
525 /* display the right bitrate from history */
526 uint32_t bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
527 if(bh_index_o != bh_index_last_o && bh_index_o != bh_index_last_w && bh_index_o != (bh_index_last_w + 1) % BITRATE_HIST_SIZE) {
528 bh_index_last_o = bh_index_o;
529 flac_ip.set_info(stream_data_.title, stream_data_.length_in_msec, bitrate_history_[bh_index_o], stream_data_.sample_rate, stream_data_.channels);
530 }
531 }
532 }
533
534 safe_decoder_finish_(decoder_);
535
536 /* are these two calls necessary? */
537 flac_ip.output->buffer_free();
538 flac_ip.output->buffer_free();
539
540 g_free(stream_data_.title);
541
542 pthread_exit(NULL);
543 return 0; /* to silence the compiler warning about not returning a value */
544 }
545
safe_decoder_init_(const char * filename,FLAC__StreamDecoder * decoder)546 FLAC__bool safe_decoder_init_(const char *filename, FLAC__StreamDecoder *decoder)
547 {
548 if(decoder == 0)
549 return false;
550
551 safe_decoder_finish_(decoder);
552
553 FLAC__stream_decoder_set_md5_checking(decoder, false);
554 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
555 FLAC__stream_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
556 FLAC__stream_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
557 if(stream_data_.is_http_source) {
558 flac_http_open(filename, 0);
559 if(FLAC__stream_decoder_init_stream(decoder, http_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, write_callback_, metadata_callback_, error_callback_, /*client_data=*/&stream_data_) != FLAC__STREAM_DECODER_INIT_STATUS_OK)
560 return false;
561 }
562 else {
563 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, /*client_data=*/&stream_data_) != FLAC__STREAM_DECODER_INIT_STATUS_OK)
564 return false;
565 }
566
567 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
568 return false;
569
570 return true;
571 }
572
safe_decoder_finish_(FLAC__StreamDecoder * decoder)573 void safe_decoder_finish_(FLAC__StreamDecoder *decoder)
574 {
575 if(decoder && FLAC__stream_decoder_get_state(decoder) != FLAC__STREAM_DECODER_UNINITIALIZED)
576 (void)FLAC__stream_decoder_finish(decoder);
577 if(stream_data_.is_http_source)
578 flac_http_close();
579 }
580
safe_decoder_delete_(FLAC__StreamDecoder * decoder)581 void safe_decoder_delete_(FLAC__StreamDecoder *decoder)
582 {
583 if(decoder) {
584 safe_decoder_finish_(decoder);
585 FLAC__stream_decoder_delete(decoder);
586 }
587 }
588
http_read_callback_(const FLAC__StreamDecoder * decoder,FLAC__byte buffer[],size_t * bytes,void * client_data)589 FLAC__StreamDecoderReadStatus http_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
590 {
591 (void)decoder;
592 (void)client_data;
593 *bytes = flac_http_read(buffer, *bytes);
594 return *bytes ? FLAC__STREAM_DECODER_READ_STATUS_CONTINUE : FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
595 }
596
write_callback_(const FLAC__StreamDecoder * decoder,const FLAC__Frame * frame,const FLAC__int32 * const buffer[],void * client_data)597 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
598 {
599 stream_data_struct *stream_data = (stream_data_struct *)client_data;
600 const uint32_t channels = stream_data->channels, wide_samples = frame->header.blocksize;
601 const uint32_t bits_per_sample = stream_data->bits_per_sample;
602 FLAC__byte *sample_buffer_start;
603
604 (void)decoder;
605
606 if(stream_data->abort_flag)
607 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
608
609 if((sample_buffer_last_ + wide_samples) > (SAMPLE_BUFFER_SIZE / (channels * stream_data->sample_format_bytes_per_sample))) {
610 memmove(sample_buffer_, sample_buffer_ + sample_buffer_first_ * channels * stream_data->sample_format_bytes_per_sample, (sample_buffer_last_ - sample_buffer_first_) * channels * stream_data->sample_format_bytes_per_sample);
611 sample_buffer_last_ -= sample_buffer_first_;
612 sample_buffer_first_ = 0;
613 }
614 sample_buffer_start = sample_buffer_ + sample_buffer_last_ * channels * stream_data->sample_format_bytes_per_sample;
615 if(stream_data->has_replaygain && flac_cfg.output.replaygain.enable) {
616 FLAC__replaygain_synthesis__apply_gain(
617 sample_buffer_start,
618 !is_big_endian_host_,
619 stream_data->sample_format_bytes_per_sample == 1, /* uint32_t_data_out */
620 buffer,
621 wide_samples,
622 channels,
623 bits_per_sample,
624 stream_data->sample_format_bytes_per_sample * 8,
625 stream_data->replay_scale,
626 flac_cfg.output.replaygain.hard_limit,
627 flac_cfg.output.resolution.replaygain.dither,
628 &stream_data->dither_context
629 );
630 }
631 else if(is_big_endian_host_) {
632 FLAC__plugin_common__pack_pcm_signed_big_endian(
633 sample_buffer_start,
634 buffer,
635 wide_samples,
636 channels,
637 bits_per_sample,
638 stream_data->sample_format_bytes_per_sample * 8
639 );
640 }
641 else {
642 FLAC__plugin_common__pack_pcm_signed_little_endian(
643 sample_buffer_start,
644 buffer,
645 wide_samples,
646 channels,
647 bits_per_sample,
648 stream_data->sample_format_bytes_per_sample * 8
649 );
650 }
651
652 sample_buffer_last_ += wide_samples;
653
654 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
655 }
656
metadata_callback_(const FLAC__StreamDecoder * decoder,const FLAC__StreamMetadata * metadata,void * client_data)657 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
658 {
659 stream_data_struct *stream_data = (stream_data_struct *)client_data;
660 (void)decoder;
661 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
662 stream_data->total_samples = metadata->data.stream_info.total_samples;
663 stream_data->bits_per_sample = metadata->data.stream_info.bits_per_sample;
664 stream_data->channels = metadata->data.stream_info.channels;
665 stream_data->sample_rate = metadata->data.stream_info.sample_rate;
666 {
667 FLAC__uint64 l = (FLAC__uint64)((double)stream_data->total_samples / (double)stream_data->sample_rate * 1000.0 + 0.5);
668 if (l > INT_MAX)
669 l = INT_MAX;
670 stream_data->length_in_msec = (int)l;
671 }
672 }
673 else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
674 double reference, gain, peak;
675 if(grabbag__replaygain_load_from_vorbiscomment(metadata, flac_cfg.output.replaygain.album_mode, /*strict=*/false, &reference, &gain, &peak)) {
676 stream_data->has_replaygain = true;
677 stream_data->replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)flac_cfg.output.replaygain.preamp, /*prevent_clipping=*/!flac_cfg.output.replaygain.hard_limit);
678 }
679 }
680 }
681
error_callback_(const FLAC__StreamDecoder * decoder,FLAC__StreamDecoderErrorStatus status,void * client_data)682 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
683 {
684 stream_data_struct *stream_data = (stream_data_struct *)client_data;
685 (void)decoder;
686 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
687 stream_data->abort_flag = true;
688 }
689