1 /*****************************************************************************
2 * hd1000a.cpp : Roku HD1000 audio output
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Author: Jon Lech Johansen <jon-vl@nanocrew.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
39 #include "aout_internal.h"
42 #include <deschutes/libraries/hdmachinex225/PCMAudioPlayer.h>
44 #define FRAME_SIZE 4096
46 /*****************************************************************************
47 * aout_sys_t: audio output method descriptor
48 *****************************************************************************
49 * This structure is part of the audio output thread descriptor.
50 * It describes the direct sound specific properties of an audio device.
51 *****************************************************************************/
60 PCMAudioPlayer * pPlayer;
63 /*****************************************************************************
65 *****************************************************************************/
66 static int Open ( vlc_object_t * );
67 static void Close ( vlc_object_t * );
69 static void Play ( aout_instance_t * );
70 static void* Thread ( vlc_object_t * );
72 static void InterleaveS16( int16_t *, int16_t * );
74 /*****************************************************************************
76 *****************************************************************************/
78 set_shortname( "Roku HD1000" );
79 set_description( N_("Roku HD1000 audio output") );
80 set_capability( "audio output", 100 );
81 set_category( CAT_AUDIO );
82 set_subcategory( SUBCAT_AUDIO_AOUT );
83 set_callbacks( Open, Close );
86 /*****************************************************************************
87 * Open: open a dummy audio device
88 *****************************************************************************/
89 static int Open( vlc_object_t * p_this )
91 aout_instance_t * p_aout = (aout_instance_t *)p_this;
92 struct aout_sys_t * p_sys;
93 PCMAudioPlayer * pPlayer;
96 /* Allocate structure */
97 p_aout->output.p_sys = p_sys =
98 (aout_sys_t *)malloc( sizeof( aout_sys_t ) );
99 if( p_aout->output.p_sys == NULL )
102 /* New PCMAudioPlayer */
103 p_sys->pPlayer = pPlayer = new PCMAudioPlayer();
104 if( p_sys->pPlayer == NULL )
110 /* Get Buffer Requirements */
111 if( !pPlayer->GetBufferRequirements( p_sys->nAlignment,
112 p_sys->nSizeMultiple,
115 msg_Err( p_aout, "GetBufferRequirements failed" );
121 p_sys->nBuffers = __MIN( p_sys->nBuffers, 4 );
123 p_sys->ppBuffers = (void **)malloc( p_sys->nBuffers * sizeof( void * ) );
124 if( p_sys->ppBuffers == NULL )
131 /* Open PCMAudioPlayer */
132 p_sys->nBufferSize = FRAME_SIZE * 4;
133 if( !pPlayer->Open( p_sys->nBuffers, p_sys->nBufferSize,
136 msg_Err( p_aout, "Open failed" );
138 free( p_sys->ppBuffers );
143 p_sys->nNextBufferIndex = 0;
145 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
147 p_aout->output.output.i_rate = 44100;
148 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
150 msg_Err( p_aout, "SetSampleRate failed" );
153 free( p_sys->ppBuffers );
159 p_aout->output.output.i_format = AOUT_FMT_S16_NE;
160 p_aout->output.i_nb_samples = FRAME_SIZE;
161 p_aout->output.output.i_physical_channels
162 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
163 p_aout->output.pf_play = Play;
164 aout_VolumeSoftInit( p_aout );
166 i_volume = config_GetInt( p_aout->p_libvlc, "volume" );
167 pPlayer->SetVolume( (u32)__MIN( i_volume * 64, 0xFFFF ) );
169 /* Create thread and wait for its readiness. */
170 if( vlc_thread_create( p_aout, "aout", Thread,
171 VLC_THREAD_PRIORITY_OUTPUT, false ) )
173 msg_Err( p_aout, "cannot create OSS thread (%m)" );
176 free( p_sys->ppBuffers );
184 /*****************************************************************************
185 * Close: close our file
186 *****************************************************************************/
187 static void Close( vlc_object_t * p_this )
190 aout_instance_t * p_aout = (aout_instance_t *)p_this;
191 struct aout_sys_t * p_sys = p_aout->output.p_sys;
193 vlc_object_kill( p_aout );
194 vlc_thread_join( p_aout );
195 p_aout->b_die = false;
199 i = p_sys->pPlayer->WaitForBuffer();
200 } while( i != 0 && i != p_sys->nBuffers );
202 p_sys->pPlayer->Close();
203 delete p_sys->pPlayer;
205 free( p_sys->ppBuffers );
209 /*****************************************************************************
211 *****************************************************************************/
212 static void Play( aout_instance_t * p_aout )
216 /*****************************************************************************
217 * Thread: thread used to DMA the data to the device
218 *****************************************************************************/
219 static void* Thread( vlc_object_t *p_this )
221 aout_instance_t * p_aout = (aout_instance_t*)p_this;
222 aout_buffer_t * p_buffer;
223 struct aout_sys_t * p_sys = p_aout->output.p_sys;
224 PCMAudioPlayer * pPlayer = p_sys->pPlayer;
225 int canc = vlc_savecancel ();
227 while( vlc_object_alive (p_aout) )
229 pPlayer->WaitForBuffer();
231 vlc_mutex_lock( &p_aout->output_fifo_lock );
232 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
233 vlc_mutex_unlock( &p_aout->output_fifo_lock );
235 #define i p_sys->nNextBufferIndex
236 if( p_buffer == NULL )
238 vlc_memset( p_aout, p_sys->ppBuffers[ i ], 0,
239 p_sys->nBufferSize );
243 InterleaveS16( (int16_t *)p_buffer->p_buffer,
244 (int16_t *)p_sys->ppBuffers[ i ] );
245 aout_BufferFree( p_buffer );
248 if( !pPlayer->QueueBuffer( (s16 *)p_sys->ppBuffers[ i ],
249 p_sys->nBufferSize / 2 ) )
251 msg_Err( p_aout, "QueueBuffer failed" );
254 i = (i + 1) % p_sys->nBuffers;
258 vlc_restorecancel (canc);
262 /*****************************************************************************
263 * InterleaveS16: interleave samples
264 *****************************************************************************/
265 static void InterleaveS16( int16_t * p_in, int16_t * p_out )
267 for( int i = 0; i < FRAME_SIZE; i++ )
269 p_out[ i * 2 + 0 ] = p_in[ i * 2 + 1 ];
270 p_out[ i * 2 + 1 ] = p_in[ i * 2 + 0 ];