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audio: moved static variables into struct audio_buffer

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There are too many static variables in audio.c - organize all
properties of the audio buffer in a struct.  The current audio format
is also a property of the buffer, since it describes the buffer's
data format.
This commit is contained in:
Max Kellermann 2008-09-10 11:43:49 +02:00
parent 9f16a34d76
commit cdbb9627a7
1 changed files with 30 additions and 26 deletions
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56
src/audio.c
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@ -30,8 +30,6 @@
#define AUDIO_DEVICE_STATE_LEN (sizeof(AUDIO_DEVICE_STATE)-1)
#define AUDIO_BUFFER_SIZE 2*MPD_PATH_MAX
static struct audio_format audio_format;
static struct audio_format *audio_configFormat;
static struct audio_output *audioOutputArray;
@ -50,9 +48,12 @@ static enum ad_state *audioDeviceStates;
static mpd_uint8 audioOpened;
static size_t audioBufferSize;
static char *audioBuffer;
static size_t audioBufferPos;
static struct {
struct audio_format format;
size_t size, position;
char *buffer;
} audio_buffer;
static unsigned int audio_output_count(void)
{
@ -224,7 +225,7 @@ int isCurrentAudioFormat(const struct audio_format *audioFormat)
{
assert(audioFormat != NULL);
return audio_format_equals(audioFormat, &audio_format);
return audio_format_equals(audioFormat, &audio_buffer.format);
}
static void syncAudioDeviceStates(void)
@ -232,7 +233,7 @@ static void syncAudioDeviceStates(void)
struct audio_output *audioOutput;
unsigned int i;
if (!audio_format_defined(&audio_format))
if (!audio_format_defined(&audio_buffer.format))
return;
for (i = 0; i < audioOutputArraySize; ++i) {
@ -242,11 +243,13 @@ static void syncAudioDeviceStates(void)
break;
case DEVICE_ON:
/* This will reopen only if the audio format changed */
if (audio_output_open(audioOutput, &audio_format) < 0)
if (audio_output_open(audioOutput,
&audio_buffer.format) < 0)
audioDeviceStates[i] = DEVICE_ENABLE;
break;
case DEVICE_ENABLE:
if (audio_output_open(audioOutput, &audio_format) == 0)
if (audio_output_open(audioOutput,
&audio_buffer.format) == 0)
audioDeviceStates[i] = DEVICE_ON;
break;
case DEVICE_DISABLE:
@ -262,7 +265,7 @@ static int flushAudioBuffer(void)
int ret = -1, err;
unsigned int i;
if (audioBufferPos == 0)
if (audio_buffer.position == 0)
return 0;
syncAudioDeviceStates();
@ -270,8 +273,9 @@ static int flushAudioBuffer(void)
for (i = 0; i < audioOutputArraySize; ++i) {
if (audioDeviceStates[i] != DEVICE_ON)
continue;
err = audio_output_play(&audioOutputArray[i], audioBuffer,
audioBufferPos);
err = audio_output_play(&audioOutputArray[i],
audio_buffer.buffer,
audio_buffer.position);
if (!err)
ret = 0;
else if (err < 0)
@ -280,7 +284,7 @@ static int flushAudioBuffer(void)
audioDeviceStates[i] = DEVICE_ENABLE;
}
audioBufferPos = 0;
audio_buffer.position = 0;
return ret;
}
@ -297,11 +301,11 @@ int openAudioDevice(const struct audio_format *audioFormat)
(audioFormat != NULL && !isCurrentAudioFormat(audioFormat))) {
flushAudioBuffer();
if (audioFormat != NULL)
audio_format = *audioFormat;
audioBufferSize = (audio_format.bits >> 3) *
audio_format.channels;
audioBufferSize *= audio_format.sampleRate >> 5;
audioBuffer = xrealloc(audioBuffer, audioBufferSize);
audio_buffer.format = *audioFormat;
audio_buffer.size = (audio_buffer.format.bits >> 3) *
audio_buffer.format.channels;
audio_buffer.size *= audio_buffer.format.sampleRate >> 5;
audio_buffer.buffer = xrealloc(audio_buffer.buffer, audio_buffer.size);
}
syncAudioDeviceStates();
@ -330,15 +334,15 @@ int playAudio(const char *playChunk, size_t size)
size_t send_size;
while (size > 0) {
send_size = audioBufferSize - audioBufferPos;
send_size = audio_buffer.size - audio_buffer.position;
send_size = send_size < size ? send_size : size;
memcpy(audioBuffer + audioBufferPos, playChunk, send_size);
audioBufferPos += send_size;
memcpy(audio_buffer.buffer + audio_buffer.position, playChunk, send_size);
audio_buffer.position += send_size;
size -= send_size;
playChunk += send_size;
if (audioBufferPos == audioBufferSize) {
if (audio_buffer.position == audio_buffer.size) {
if (flushAudioBuffer() < 0)
return -1;
}
@ -352,7 +356,7 @@ void dropBufferedAudio(void)
unsigned int i;
syncAudioDeviceStates();
audioBufferPos = 0;
audio_buffer.position = 0;
for (i = 0; i < audioOutputArraySize; ++i) {
if (audioDeviceStates[i] == DEVICE_ON)
@ -366,9 +370,9 @@ void closeAudioDevice(void)
flushAudioBuffer();
free(audioBuffer);
audioBuffer = NULL;
audioBufferSize = 0;
free(audio_buffer.buffer);
audio_buffer.buffer = NULL;
audio_buffer.size = 0;
for (i = 0; i < audioOutputArraySize; ++i) {
if (audioDeviceStates[i] == DEVICE_ON)