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 "aout_internal.h"
39 #include <deschutes/libraries/hdmachinex225/PCMAudioPlayer.h>
41 #define FRAME_SIZE 4096
43 /*****************************************************************************
44 * aout_sys_t: audio output method descriptor
45 *****************************************************************************
46 * This structure is part of the audio output thread descriptor.
47 * It describes the direct sound specific properties of an audio device.
48 *****************************************************************************/
57 PCMAudioPlayer * pPlayer;
60 /*****************************************************************************
62 *****************************************************************************/
63 static int Open ( vlc_object_t * );
64 static void Close ( vlc_object_t * );
66 static void Play ( aout_instance_t * );
67 static int Thread ( aout_instance_t * );
69 static void InterleaveS16( int16_t *, int16_t * );
71 /*****************************************************************************
73 *****************************************************************************/
75 set_shortname( "Roku HD1000" );
76 set_description( _("Roku HD1000 audio output") );
77 set_capability( "audio output", 100 );
78 set_category( CAT_AUDIO );
79 set_subcategory( SUBCAT_AUDIO_AOUT );
80 set_callbacks( Open, Close );
83 /*****************************************************************************
84 * Open: open a dummy audio device
85 *****************************************************************************/
86 static int Open( vlc_object_t * p_this )
88 aout_instance_t * p_aout = (aout_instance_t *)p_this;
89 struct aout_sys_t * p_sys;
90 PCMAudioPlayer * pPlayer;
93 /* Allocate structure */
94 p_aout->output.p_sys = p_sys =
95 (aout_sys_t *)malloc( sizeof( aout_sys_t ) );
96 if( p_aout->output.p_sys == NULL )
98 msg_Err( p_aout, "out of memory" );
102 /* New PCMAudioPlayer */
103 p_sys->pPlayer = pPlayer = new PCMAudioPlayer();
104 if( p_sys->pPlayer == NULL )
106 msg_Err( p_aout, "out of memory" );
111 /* Get Buffer Requirements */
112 if( !pPlayer->GetBufferRequirements( p_sys->nAlignment,
113 p_sys->nSizeMultiple,
116 msg_Err( p_aout, "GetBufferRequirements failed" );
122 p_sys->nBuffers = __MIN( p_sys->nBuffers, 4 );
124 p_sys->ppBuffers = (void **)malloc( p_sys->nBuffers * sizeof( void * ) );
125 if( p_sys->ppBuffers == NULL )
127 msg_Err( p_aout, "out of memory" );
133 /* Open PCMAudioPlayer */
134 p_sys->nBufferSize = FRAME_SIZE * 4;
135 if( !pPlayer->Open( p_sys->nBuffers, p_sys->nBufferSize,
138 msg_Err( p_aout, "Open failed" );
140 free( p_sys->ppBuffers );
145 p_sys->nNextBufferIndex = 0;
147 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
149 p_aout->output.output.i_rate = 44100;
150 if( !pPlayer->SetSampleRate( p_aout->output.output.i_rate ) )
152 msg_Err( p_aout, "SetSampleRate failed" );
155 free( p_sys->ppBuffers );
161 p_aout->output.output.i_format = AOUT_FMT_S16_NE;
162 p_aout->output.i_nb_samples = FRAME_SIZE;
163 p_aout->output.output.i_physical_channels
164 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
165 p_aout->output.pf_play = Play;
166 aout_VolumeSoftInit( p_aout );
168 i_volume = config_GetInt( p_aout->p_libvlc, "volume" );
169 pPlayer->SetVolume( (u32)__MIN( i_volume * 64, 0xFFFF ) );
171 /* Create thread and wait for its readiness. */
172 if( vlc_thread_create( p_aout, "aout", Thread,
173 VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
175 msg_Err( p_aout, "cannot create OSS thread (%s)", strerror(errno) );
178 free( p_sys->ppBuffers );
186 /*****************************************************************************
187 * Close: close our file
188 *****************************************************************************/
189 static void Close( vlc_object_t * p_this )
192 aout_instance_t * p_aout = (aout_instance_t *)p_this;
193 struct aout_sys_t * p_sys = p_aout->output.p_sys;
195 vlc_object_kill( p_aout );
196 vlc_thread_join( p_aout );
197 p_aout->b_die = VLC_FALSE;
201 i = p_sys->pPlayer->WaitForBuffer();
202 } while( i != 0 && i != p_sys->nBuffers );
204 p_sys->pPlayer->Close();
205 delete p_sys->pPlayer;
207 free( p_sys->ppBuffers );
211 /*****************************************************************************
213 *****************************************************************************/
214 static void Play( aout_instance_t * p_aout )
218 /*****************************************************************************
219 * Thread: thread used to DMA the data to the device
220 *****************************************************************************/
221 static int Thread( aout_instance_t * p_aout )
223 aout_buffer_t * p_buffer;
224 struct aout_sys_t * p_sys = p_aout->output.p_sys;
225 PCMAudioPlayer * pPlayer = p_sys->pPlayer;
227 while( !p_aout->b_die )
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 p_aout->p_libvlc->pf_memset( 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;
261 /*****************************************************************************
262 * InterleaveS16: interleave samples
263 *****************************************************************************/
264 static void InterleaveS16( int16_t * p_in, int16_t * p_out )
266 for( int i = 0; i < FRAME_SIZE; i++ )
268 p_out[ i * 2 + 0 ] = p_in[ i * 2 + 1 ];
269 p_out[ i * 2 + 1 ] = p_in[ i * 2 + 0 ];