4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include "FLAC/stream_decoder.h"
28 #include "FLAC/stream_encoder.h"
32 #include "bcsignals.h"
33 #include "bitspopup.h"
34 #include "byteorder.h"
38 #include "filesystem.h"
41 #include "mwindow.inc"
44 FileFLAC::FileFLAC(Asset *asset, File *file)
45 : FileBase(asset, file)
48 if(asset->format == FILE_UNKNOWN) asset->format = FILE_FLAC;
49 asset->byte_order = 0;
57 void FileFLAC::get_parameters(BC_WindowBase *parent_window,
59 BC_WindowBase* &format_window,
65 FLACConfigAudio *window = new FLACConfigAudio(parent_window, asset);
66 format_window = window;
67 window->create_objects();
75 int FileFLAC::check_sig(Asset *asset, char *test)
90 int FileFLAC::reset_parameters_derived()
104 static FLAC__StreamDecoderWriteStatus write_callback(
105 const FLAC__StreamDecoder *decoder,
106 const FLAC__Frame *frame,
107 const FLAC__int32 * const buffer[],
110 FileFLAC *ptr = (FileFLAC*)client_data;
112 if(!ptr->initialized)
114 ptr->initialized = 1;
115 ptr->asset->audio_data = 1;
116 ptr->asset->channels = FLAC__stream_decoder_get_channels(ptr->flac_decode);
117 ptr->asset->bits = FLAC__stream_decoder_get_bits_per_sample(ptr->flac_decode);
118 ptr->asset->sample_rate = FLAC__stream_decoder_get_sample_rate(ptr->flac_decode);
119 ptr->asset->audio_length = FLAC__stream_decoder_get_total_samples(ptr->flac_decode);
120 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
125 int fragment = FLAC__stream_decoder_get_blocksize(ptr->flac_decode);
126 ptr->samples_read += fragment;
127 //printf("write_callback 2 %d\n", fragment);
129 if(ptr->temp_allocated < fragment)
133 for(int i = 0; i < ptr->temp_channels; i++)
135 delete [] ptr->temp_buffer[i];
137 delete [] ptr->temp_buffer;
140 ptr->temp_channels = ptr->asset->channels;
141 ptr->temp_buffer = new int32_t*[ptr->temp_channels];
142 for(int i = 0; i < ptr->temp_channels; i++)
144 ptr->temp_buffer[i] = new int32_t[fragment];
146 ptr->temp_allocated = fragment;
149 float audio_max = (float)0x7fff;
150 if(FLAC__stream_decoder_get_bits_per_sample(ptr->flac_decode) == 24)
151 audio_max = (float)0x7fffff;
153 int nchannels = FLAC__stream_decoder_get_channels(ptr->flac_decode);
154 if( nchannels > ptr->temp_channels ) nchannels = ptr->temp_channels;
155 for(int j = 0; j < nchannels; j++)
157 float *dst = (float*)ptr->temp_buffer[j];
158 int32_t *src = (int32_t*)buffer[j];
159 for(int i = 0; i < fragment; i++)
161 *dst++ = (float)*src++ / audio_max;
165 ptr->append_history((float**)ptr->temp_buffer, fragment);
167 //printf("write_callback 3\n");
168 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
171 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
175 static void metadata_callback(const FLAC__StreamDecoder *decoder,
176 const FLAC__StreamMetadata *metadata,
179 // printf("metadata_callback\n");
182 static void error_callback(const FLAC__StreamDecoder *decoder,
183 FLAC__StreamDecoderErrorStatus status,
186 // printf("error_callback\n");
193 int FileFLAC::open_file(int rd, int wr)
199 file_bytes = FileSystem::get_size(asset->path);
200 flac_decode = FLAC__stream_decoder_new();
201 FLAC__stream_decoder_init_file(flac_decode,
211 if(!FLAC__stream_decoder_process_single(flac_decode)) break;
218 FLAC__stream_decoder_seek_absolute(flac_decode, 0);
224 flac_encode = FLAC__stream_encoder_new();
225 FLAC__stream_encoder_set_channels(flac_encode, asset->channels);
226 FLAC__stream_encoder_set_bits_per_sample(flac_encode, asset->bits);
227 FLAC__stream_encoder_set_sample_rate(flac_encode, asset->sample_rate);
228 FLAC__stream_encoder_init_file(flac_encode,
238 int FileFLAC::close_file_derived()
242 FLAC__stream_decoder_finish(flac_decode);
243 FLAC__stream_decoder_delete(flac_decode);
248 FLAC__stream_encoder_finish(flac_encode);
249 FLAC__stream_encoder_delete(flac_encode);
255 for(int i = 0; i < temp_channels; i++)
256 delete [] temp_buffer[i];
257 delete [] temp_buffer;
263 int FileFLAC::write_samples(double **buffer, int64_t len)
265 // Create temporary buffer of samples
266 if(temp_allocated < len)
270 for(int i = 0; i < asset->channels; i++)
272 delete [] temp_buffer[i];
274 delete [] temp_buffer;
277 temp_buffer = new int32_t*[asset->channels];
278 for(int i = 0; i < asset->channels; i++)
280 temp_buffer[i] = new int32_t[len];
282 temp_allocated = len;
285 float audio_max = (float)0x7fff;
290 audio_max = (float)0x7fffff;
294 for(int i = 0; i < asset->channels; i++)
296 int32_t *dst = temp_buffer[i];
297 double *src = buffer[i];
298 for(int j = 0; j < len; j++)
300 double sample = *src++ * audio_max;
301 CLAMP(sample, -audio_max, audio_max);
302 *dst++ = (int32_t)sample;
306 int result = FLAC__stream_encoder_process(flac_encode,
313 int FileFLAC::read_samples(double *buffer, int64_t len)
316 update_pcm_history(len);
318 if(decode_end != decode_start)
320 FLAC__stream_decoder_seek_absolute(flac_decode, decode_start);
321 decode_end = decode_start;
327 while(samples_read < decode_len)
329 FLAC__uint64 position;
330 FLAC__stream_decoder_get_decode_position(flac_decode, &position);
332 if((int64_t)position >= file_bytes) break;
333 if(!FLAC__stream_decoder_process_single(flac_decode)) {
343 file->current_sample,
344 file->current_channel,
348 //printf("FileFLAC::read_samples 10\n");
361 FLACConfigAudio::FLACConfigAudio(BC_WindowBase *parent_window,
363 : BC_Window(_(PROGRAM_NAME ": Audio Compression"),
364 parent_window->get_abs_cursor_x(1),
365 parent_window->get_abs_cursor_y(1),
374 this->parent_window = parent_window;
378 FLACConfigAudio::~FLACConfigAudio()
382 void FLACConfigAudio::create_objects()
385 lock_window("FLACConfigAudio::create_objects");
386 bits_popup = new BitsPopup(this, x, y, &asset->bits, 0, 0, 0, 0, 0);
387 bits_popup->create_objects();
389 add_subwindow(new BC_OKButton(this));
394 int FLACConfigAudio::close_event()