PortAudio 2.0

paex_wmme_ac3.c
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1
6/*
7 * $Id: $
8 * Portable Audio I/O Library
9 * Windows MME ac3 sound output test
10 *
11 * Copyright (c) 2009 Ross Bencina
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files
15 * (the "Software"), to deal in the Software without restriction,
16 * including without limitation the rights to use, copy, modify, merge,
17 * publish, distribute, sublicense, and/or sell copies of the Software,
18 * and to permit persons to whom the Software is furnished to do so,
19 * subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
27 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
28 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
29 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 */
32
33/*
34 * The text above constitutes the entire PortAudio license; however,
35 * the PortAudio community also makes the following non-binding requests:
36 *
37 * Any person wishing to distribute modifications to the Software is
38 * requested to send the modifications to the original developer so that
39 * they can be incorporated into the canonical version. It is also
40 * requested that these non-binding requests be included along with the
41 * license above.
42 */
43
44#include <stdio.h>
45#include <math.h>
46
47#include <windows.h> /* required when using pa_win_wmme.h */
48#include <mmsystem.h> /* required when using pa_win_wmme.h */
49
50#include "portaudio.h"
51#include "pa_win_wmme.h"
52
53#define NUM_SECONDS (20)
54#define SAMPLE_RATE (48000)
55#define FRAMES_PER_BUFFER (64)
56
57#ifndef M_PI
58#define M_PI (3.14159265)
59#endif
60
61#define TABLE_SIZE (100)
62
63#define CHANNEL_COUNT (2)
64
65
66
67 typedef struct
68{
69 short *buffer;
70 int bufferSampleCount;
71 int playbackIndex;
72}
73 paTestData;
74
75/* This routine will be called by the PortAudio engine when audio is needed.
76** It may called at interrupt level on some machines so don't do anything
77** that could mess up the system like calling malloc() or free().
78*/
79 static int patestCallback( const void *inputBuffer, void *outputBuffer,
80 unsigned long framesPerBuffer,
81 const PaStreamCallbackTimeInfo* timeInfo,
82 PaStreamCallbackFlags statusFlags,
83 void *userData )
84{
85 paTestData *data = (paTestData*)userData;
86 short *out = (short*)outputBuffer;
87 unsigned long i,j;
88
89 (void) timeInfo; /* Prevent unused variable warnings. */
90 (void) statusFlags;
91 (void) inputBuffer;
92
93 /* stream out contents of data->buffer looping at end */
94
95 for( i=0; i<framesPerBuffer; i++ )
96 {
97 for( j = 0; j < CHANNEL_COUNT; ++j ){
98 *out++ = data->buffer[ data->playbackIndex++ ];
99
100 if( data->playbackIndex >= data->bufferSampleCount )
101 data->playbackIndex = 0; /* loop at end of buffer */
102 }
103 }
104
105 return paContinue;
106}
107
108/*******************************************************************/
109 int main(int argc, char* argv[])
110{
111 PaStreamParameters outputParameters;
112 PaWinMmeStreamInfo wmmeStreamInfo;
113 PaStream *stream;
114 PaError err;
115 paTestData data;
116 int deviceIndex;
117 FILE *fp;
118 const char *fileName = "c:\\test_48k.ac3.spdif";
119 data.buffer = NULL;
120
121 printf("usage: patest_wmme_ac3 fileName [paDeviceIndex]\n");
122 printf("**IMPORTANT*** The provided file must include the spdif preamble at the start of every AC-3 frame. Using a normal ac3 file won't work.\n");
123 printf("PortAudio Test: output a raw spdif ac3 stream. SR = %d, BufSize = %d, Chans = %d\n",
124 SAMPLE_RATE, FRAMES_PER_BUFFER, CHANNEL_COUNT);
125
126
127 if( argc >= 2 )
128 fileName = argv[1];
129
130 printf( "reading spdif ac3 raw stream file %s\n", fileName );
131
132 fp = fopen( fileName, "rb" );
133 if( !fp ){
134 fprintf( stderr, "error opening spdif ac3 file.\n" );
135 return -1;
136 }
137 /* get file size */
138 fseek( fp, 0, SEEK_END );
139 data.bufferSampleCount = ftell( fp ) / sizeof(short);
140 fseek( fp, 0, SEEK_SET );
141
142 /* allocate buffer, read the whole file into memory */
143 data.buffer = (short*)malloc( data.bufferSampleCount * sizeof(short) );
144 if( !data.buffer ){
145 fprintf( stderr, "error allocating buffer.\n" );
146 return -1;
147 }
148
149 fread( data.buffer, sizeof(short), data.bufferSampleCount, fp );
150 fclose( fp );
151
152 data.playbackIndex = 0;
153
154 err = Pa_Initialize();
155 if( err != paNoError ) goto error;
156
157 deviceIndex = Pa_GetHostApiInfo( Pa_HostApiTypeIdToHostApiIndex( paMME ) )->defaultOutputDevice;
158 if( argc >= 3 ){
159 sscanf( argv[1], "%d", &deviceIndex );
160 }
161
162 printf( "using device id %d (%s)\n", deviceIndex, Pa_GetDeviceInfo(deviceIndex)->name );
163
164
165 outputParameters.device = deviceIndex;
166 outputParameters.channelCount = CHANNEL_COUNT;
167 outputParameters.sampleFormat = paInt16; /* IMPORTANT must use paInt16 for WMME AC3 */
168 outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
169 outputParameters.hostApiSpecificStreamInfo = NULL;
170
171 wmmeStreamInfo.size = sizeof(PaWinMmeStreamInfo);
172 wmmeStreamInfo.hostApiType = paMME;
173 wmmeStreamInfo.version = 1;
174 wmmeStreamInfo.flags = paWinMmeWaveFormatDolbyAc3Spdif;
175 outputParameters.hostApiSpecificStreamInfo = &wmmeStreamInfo;
176
177
178 if( Pa_IsFormatSupported( 0, &outputParameters, SAMPLE_RATE ) == paFormatIsSupported ){
179 printf( "Pa_IsFormatSupported reports device will support %d channels.\n", CHANNEL_COUNT );
180 }else{
181 printf( "Pa_IsFormatSupported reports device will not support %d channels.\n", CHANNEL_COUNT );
182 }
183
184 err = Pa_OpenStream(
185 &stream,
186 NULL, /* no input */
187 &outputParameters,
188 SAMPLE_RATE,
189 FRAMES_PER_BUFFER,
190 0,
191 patestCallback,
192 &data );
193 if( err != paNoError ) goto error;
194
195 err = Pa_StartStream( stream );
196 if( err != paNoError ) goto error;
197
198 printf("Play for %d seconds.\n", NUM_SECONDS );
199 Pa_Sleep( NUM_SECONDS * 1000 );
200
201 err = Pa_StopStream( stream );
202 if( err != paNoError ) goto error;
203
204 err = Pa_CloseStream( stream );
205 if( err != paNoError ) goto error;
206
207 Pa_Terminate();
208 free( data.buffer );
209 printf("Test finished.\n");
210
211 return err;
212error:
213 Pa_Terminate();
214 free( data.buffer );
215
216 fprintf( stderr, "An error occurred while using the portaudio stream\n" );
217 fprintf( stderr, "Error number: %d\n", err );
218 fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
219 return err;
220}
pa_win_wmme.h
WMME-specific PortAudio API extension header file.
portaudio.h
The portable PortAudio API.
Pa_HostApiTypeIdToHostApiIndex
PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex(PaHostApiTypeId type)
Pa_Terminate
PaError Pa_Terminate(void)
PaStream
void PaStream
Definition: portaudio.h:635
Pa_Sleep
void Pa_Sleep(long msec)
paFormatIsSupported
#define paFormatIsSupported
Definition: portaudio.h:585
Pa_OpenStream
PaError Pa_OpenStream(PaStream **stream, const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters, double sampleRate, unsigned long framesPerBuffer, PaStreamFlags streamFlags, PaStreamCallback *streamCallback, void *userData)
PaError
int PaError
Definition: portaudio.h:121
PaStreamCallbackFlags
unsigned long PaStreamCallbackFlags
Definition: portaudio.h:712
Pa_StartStream
PaError Pa_StartStream(PaStream *stream)
Pa_CloseStream
PaError Pa_CloseStream(PaStream *stream)
paInt16
#define paInt16
Definition: portaudio.h:490
Pa_GetDeviceInfo
const PaDeviceInfo * Pa_GetDeviceInfo(PaDeviceIndex device)
Pa_IsFormatSupported
PaError Pa_IsFormatSupported(const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters, double sampleRate)
Pa_Initialize
PaError Pa_Initialize(void)
Pa_GetErrorText
const char * Pa_GetErrorText(PaError errorCode)
paContinue
@ paContinue
Definition: portaudio.h:755
Pa_StopStream
PaError Pa_StopStream(PaStream *stream)
Pa_GetHostApiInfo
const PaHostApiInfo * Pa_GetHostApiInfo(PaHostApiIndex hostApi)
PaHostApiInfo::defaultOutputDevice
PaDeviceIndex defaultOutputDevice
Definition: portaudio.h:322
PaStreamCallbackTimeInfo
Definition: portaudio.h:699
PaStreamParameters
Definition: portaudio.h:539
PaStreamParameters::channelCount
int channelCount
Definition: portaudio.h:553
PaStreamParameters::suggestedLatency
PaTime suggestedLatency
Definition: portaudio.h:572
PaStreamParameters::sampleFormat
PaSampleFormat sampleFormat
Definition: portaudio.h:559
PaStreamParameters::device
PaDeviceIndex device
Definition: portaudio.h:546
PaStreamParameters::hostApiSpecificStreamInfo
void * hostApiSpecificStreamInfo
Definition: portaudio.h:579
PaWinMmeStreamInfo
Definition: pa_win_wmme.h:82
PaWinMmeStreamInfo::hostApiType
PaHostApiTypeId hostApiType
Definition: pa_win_wmme.h:84
PaWinMmeStreamInfo::size
unsigned long size
Definition: pa_win_wmme.h:83
PaWinMmeStreamInfo::version
unsigned long version
Definition: pa_win_wmme.h:85
paTestData
Definition: paex_mono_asio_channel_select.c:66