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 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
37 #include "aout_internal.h"
40 #include <deschutes/libraries/hdmachinex225/PCMAudioPlayer.h>
42 #define FRAME_SIZE 4096
44 /*****************************************************************************
45 * aout_sys_t: audio output method descriptor
46 *****************************************************************************
47 * This structure is part of the audio output thread descriptor.
48 * It describes the direct sound specific properties of an audio device.
49 *****************************************************************************/
58 PCMAudioPlayer * pPlayer;
61 /*****************************************************************************
63 *****************************************************************************/
64 static int Open ( vlc_object_t * );
65 static void Close ( vlc_object_t * );
67 static void Play ( aout_instance_t * );
68 static void* Thread ( vlc_object_t * );
70 static void InterleaveS16( int16_t *, int16_t * );
72 /*****************************************************************************
74 *****************************************************************************/
76 set_shortname( "Roku HD1000" )
77 set_description( N_("Roku HD1000 audio output") )
78 set_capability( "audio output", 100 )
79 set_category( CAT_AUDIO )
80 set_subcategory( SUBCAT_AUDIO_AOUT )
81 set_callbacks( Open, Close )
84 /*****************************************************************************
85 * Open: open a dummy audio device
86 *****************************************************************************/
87 static int Open( vlc_object_t * p_this )
89 aout_instance_t * p_aout = (aout_instance_t *)p_this;
90 struct aout_sys_t * p_sys;
91 PCMAudioPlayer * pPlayer;
94 /* Allocate structure */
95 p_aout->output.p_sys = p_sys =
96 (aout_sys_t *)malloc( sizeof( aout_sys_t ) );
97 if( p_aout->output.p_sys == NULL )
100 /* New PCMAudioPlayer */
101 p_sys->pPlayer = pPlayer = new PCMAudioPlayer();
102 if( p_sys->pPlayer == NULL )
108 /* Get Buffer Requirements */
109 if( !pPlayer->GetBufferRequirements( p_sys->nAlignment,
110 p_sys->nSizeMultiple,
113 msg_Err( p_aout, "GetBufferRequirements failed" );
119 p_sys->nBuffers = __MIN( p_sys->nBuffers, 4 );
121 p_sys->ppBuffers = (void **)malloc( p_sys->nBuffers * sizeof( void * ) );
122 if( p_sys->ppBuffers == NULL )
129 /* Open PCMAudioPlayer */
130 p_sys->nBufferSize = FRAME_SIZE * 4;
131 if( !pPlayer->Open( p_sys->nBuffers, p_sys->nBufferSize,
134 msg_Err( p_aout, "Open failed" );
136 free( p_sys->ppBuffers );
141 p_sys->nNextBufferIndex = 0;
143 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
145 p_aout->output.output.i_rate = 44100;
146 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
148 msg_Err( p_aout, "SetSampleRate failed" );
151 free( p_sys->ppBuffers );
157 p_aout->output.output.i_format = VLC_CODEC_S16N;
158 p_aout->output.i_nb_samples = FRAME_SIZE;
159 p_aout->output.output.i_physical_channels
160 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
161 p_aout->output.pf_play = Play;
162 aout_VolumeSoftInit( p_aout );
164 i_volume = config_GetInt( p_aout->p_libvlc, "volume" );
165 pPlayer->SetVolume( (u32)__MIN( i_volume * 64, 0xFFFF ) );
167 /* Create thread and wait for its readiness. */
168 if( vlc_thread_create( p_aout, "aout", Thread,
169 VLC_THREAD_PRIORITY_OUTPUT ) )
171 msg_Err( p_aout, "cannot create OSS thread (%m)" );
174 free( p_sys->ppBuffers );
182 /*****************************************************************************
183 * Close: close our file
184 *****************************************************************************/
185 static void Close( vlc_object_t * p_this )
188 aout_instance_t * p_aout = (aout_instance_t *)p_this;
189 struct aout_sys_t * p_sys = p_aout->output.p_sys;
191 vlc_object_kill( p_aout );
192 vlc_thread_join( p_aout );
193 p_aout->b_die = false;
197 i = p_sys->pPlayer->WaitForBuffer();
198 } while( i != 0 && i != p_sys->nBuffers );
200 p_sys->pPlayer->Close();
201 delete p_sys->pPlayer;
203 free( p_sys->ppBuffers );
207 /*****************************************************************************
209 *****************************************************************************/
210 static void Play( aout_instance_t * p_aout )
214 /*****************************************************************************
215 * Thread: thread used to DMA the data to the device
216 *****************************************************************************/
217 static void* Thread( vlc_object_t *p_this )
219 aout_instance_t * p_aout = (aout_instance_t*)p_this;
220 aout_buffer_t * p_buffer;
221 struct aout_sys_t * p_sys = p_aout->output.p_sys;
222 PCMAudioPlayer * pPlayer = p_sys->pPlayer;
223 int canc = vlc_savecancel ();
225 while( vlc_object_alive (p_aout) )
227 pPlayer->WaitForBuffer();
229 vlc_mutex_lock( &p_aout->output_fifo_lock );
230 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
231 vlc_mutex_unlock( &p_aout->output_fifo_lock );
233 #define i p_sys->nNextBufferIndex
234 if( p_buffer == NULL )
236 vlc_memset( p_aout, p_sys->ppBuffers[ i ], 0,
237 p_sys->nBufferSize );
241 InterleaveS16( (int16_t *)p_buffer->p_buffer,
242 (int16_t *)p_sys->ppBuffers[ i ] );
243 aout_BufferFree( p_buffer );
246 if( !pPlayer->QueueBuffer( (s16 *)p_sys->ppBuffers[ i ],
247 p_sys->nBufferSize / 2 ) )
249 msg_Err( p_aout, "QueueBuffer failed" );
252 i = (i + 1) % p_sys->nBuffers;
256 vlc_restorecancel (canc);
260 /*****************************************************************************
261 * InterleaveS16: interleave samples
262 *****************************************************************************/
263 static void InterleaveS16( int16_t * p_in, int16_t * p_out )
265 for( int i = 0; i < FRAME_SIZE; i++ )
267 p_out[ i * 2 + 0 ] = p_in[ i * 2 + 1 ];
268 p_out[ i * 2 + 1 ] = p_in[ i * 2 + 0 ];