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 *****************************************************************************/
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 int Thread ( aout_instance_t * );
72 static void InterleaveS16( int16_t *, int16_t * );
74 /*****************************************************************************
76 *****************************************************************************/
78 set_shortname( "Roku HD1000" );
79 set_description( _("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 )
101 msg_Err( p_aout, "out of memory" );
105 /* New PCMAudioPlayer */
106 p_sys->pPlayer = pPlayer = new PCMAudioPlayer();
107 if( p_sys->pPlayer == NULL )
109 msg_Err( p_aout, "out of memory" );
114 /* Get Buffer Requirements */
115 if( !pPlayer->GetBufferRequirements( p_sys->nAlignment,
116 p_sys->nSizeMultiple,
119 msg_Err( p_aout, "GetBufferRequirements failed" );
125 p_sys->nBuffers = __MIN( p_sys->nBuffers, 4 );
127 p_sys->ppBuffers = (void **)malloc( p_sys->nBuffers * sizeof( void * ) );
128 if( p_sys->ppBuffers == NULL )
130 msg_Err( p_aout, "out of memory" );
136 /* Open PCMAudioPlayer */
137 p_sys->nBufferSize = FRAME_SIZE * 4;
138 if( !pPlayer->Open( p_sys->nBuffers, p_sys->nBufferSize,
141 msg_Err( p_aout, "Open failed" );
143 free( p_sys->ppBuffers );
148 p_sys->nNextBufferIndex = 0;
150 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
152 p_aout->output.output.i_rate = 44100;
153 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
155 msg_Err( p_aout, "SetSampleRate failed" );
158 free( p_sys->ppBuffers );
164 p_aout->output.output.i_format = AOUT_FMT_S16_NE;
165 p_aout->output.i_nb_samples = FRAME_SIZE;
166 p_aout->output.output.i_physical_channels
167 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
168 p_aout->output.pf_play = Play;
169 aout_VolumeSoftInit( p_aout );
171 i_volume = config_GetInt( p_aout->p_libvlc, "volume" );
172 pPlayer->SetVolume( (u32)__MIN( i_volume * 64, 0xFFFF ) );
174 /* Create thread and wait for its readiness. */
175 if( vlc_thread_create( p_aout, "aout", Thread,
176 VLC_THREAD_PRIORITY_OUTPUT, false ) )
178 msg_Err( p_aout, "cannot create OSS thread (%m)" );
181 free( p_sys->ppBuffers );
189 /*****************************************************************************
190 * Close: close our file
191 *****************************************************************************/
192 static void Close( vlc_object_t * p_this )
195 aout_instance_t * p_aout = (aout_instance_t *)p_this;
196 struct aout_sys_t * p_sys = p_aout->output.p_sys;
198 vlc_object_kill( p_aout );
199 vlc_thread_join( p_aout );
200 p_aout->b_die = false;
204 i = p_sys->pPlayer->WaitForBuffer();
205 } while( i != 0 && i != p_sys->nBuffers );
207 p_sys->pPlayer->Close();
208 delete p_sys->pPlayer;
210 free( p_sys->ppBuffers );
214 /*****************************************************************************
216 *****************************************************************************/
217 static void Play( aout_instance_t * p_aout )
221 /*****************************************************************************
222 * Thread: thread used to DMA the data to the device
223 *****************************************************************************/
224 static int Thread( aout_instance_t * p_aout )
226 aout_buffer_t * p_buffer;
227 struct aout_sys_t * p_sys = p_aout->output.p_sys;
228 PCMAudioPlayer * pPlayer = p_sys->pPlayer;
230 while( !p_aout->b_die )
232 pPlayer->WaitForBuffer();
234 vlc_mutex_lock( &p_aout->output_fifo_lock );
235 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
236 vlc_mutex_unlock( &p_aout->output_fifo_lock );
238 #define i p_sys->nNextBufferIndex
239 if( p_buffer == NULL )
241 vlc_memset( p_aout, p_sys->ppBuffers[ i ], 0,
242 p_sys->nBufferSize );
246 InterleaveS16( (int16_t *)p_buffer->p_buffer,
247 (int16_t *)p_sys->ppBuffers[ i ] );
248 aout_BufferFree( p_buffer );
251 if( !pPlayer->QueueBuffer( (s16 *)p_sys->ppBuffers[ i ],
252 p_sys->nBufferSize / 2 ) )
254 msg_Err( p_aout, "QueueBuffer failed" );
257 i = (i + 1) % p_sys->nBuffers;
264 /*****************************************************************************
265 * InterleaveS16: interleave samples
266 *****************************************************************************/
267 static void InterleaveS16( int16_t * p_in, int16_t * p_out )
269 for( int i = 0; i < FRAME_SIZE; i++ )
271 p_out[ i * 2 + 0 ] = p_in[ i * 2 + 1 ];
272 p_out[ i * 2 + 1 ] = p_in[ i * 2 + 0 ];