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some cleanups

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This commit is contained in:
cebix 2001-07-05 21:24:45 +00:00
parent 7eb6ed2b86
commit 791baa8f6f
1 changed files with 42 additions and 31 deletions
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73
BasiliskII/src/Unix/audio_oss_esd.cpp
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@ -60,7 +60,6 @@ static int audio_channel_count_index = 0;
// Global variables
static int audio_fd = -1; // fd of /dev/dsp or ESD
static int mixer_fd = -1; // fd of /dev/mixer
static bool formats_known = false; // Flag: available audio formats have been probed
static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read
static bool sem_inited = false; // Flag: audio_irq_done_sem initialized
static int sound_buffer_size; // Size of sound buffer in bytes
@ -100,7 +99,7 @@ static bool open_dsp(void)
printf("Using " DSP_NAME " audio output\n");
// Get supported sample formats
if (!formats_known) {
if (audio_sample_sizes.empty()) {
unsigned long format;
ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &format);
if (format & AFMT_U8)
@ -133,7 +132,6 @@ static bool open_dsp(void)
audio_sample_rate_index = audio_sample_rates.size() - 1;
audio_sample_size_index = audio_sample_sizes.size() - 1;
audio_channel_count_index = audio_channel_counts.size() - 1;
formats_known = true;
}
// Set DSP parameters
@ -172,33 +170,27 @@ static bool open_dsp(void)
static bool open_esd(void)
{
#ifdef ENABLE_ESD
// ESD supports a variety of audio formats
if (!formats_known) {
audio_sample_rates.push_back(11025 << 16);
audio_sample_rates.push_back(22050 << 16);
audio_sample_rates.push_back(44100 << 16);
audio_sample_sizes.push_back(8);
audio_sample_sizes.push_back(16);
audio_channel_counts.push_back(1);
audio_channel_counts.push_back(2);
// Default to 44.1kHz, 16-bit, stereo
audio_sample_rate_index = 2;
audio_sample_size_index = 1;
audio_channel_count_index = 1;
formats_known = true;
}
// ESD audio format
int rate;
esd_format_t format = ESD_STREAM | ESD_PLAY;
if (audio_sample_sizes[audio_sample_size_index] == 8)
format |= ESD_BITS8;
else
format |= ESD_BITS16;
if (audio_channel_counts[audio_channel_count_index] == 1)
format |= ESD_MONO;
else
format |= ESD_STEREO;
if (audio_sample_sizes.empty()) {
// Default values
rate = 44100;
format |= (ESD_BITS16 | ESD_STEREO);
} else {
rate = audio_sample_rates[audio_sample_rate_index] >> 16;
if (audio_sample_sizes[audio_sample_size_index] == 8)
format |= ESD_BITS8;
else
format |= ESD_BITS16;
if (audio_channel_counts[audio_channel_count_index] == 1)
format |= ESD_MONO;
else
format |= ESD_STEREO;
}
#if WORDS_BIGENDIAN
little_endian = false;
@ -208,15 +200,34 @@ static bool open_esd(void)
silence_byte = 0; // Is this correct for 8-bit mode?
// Open connection to ESD server
audio_fd = esd_play_stream(format, audio_sample_rates[audio_sample_rate_index] >> 16, NULL, NULL);
audio_fd = esd_play_stream(format, rate, NULL, NULL);
if (audio_fd < 0) {
fprintf(stderr, "WARNING: Cannot open ESD connection\n");
formats_known = false;
return false;
}
printf("Using ESD audio output\n");
// ESD supports a variety of twisted little audio formats, all different
if (audio_sample_sizes.empty()) {
// The reason we do this here is that we don't want to add sample
// rates etc. unless the ESD server connection could be opened
// (if ESD fails, /dev/dsp might be tried next)
audio_sample_rates.push_back(11025 << 16);
audio_sample_rates.push_back(22050 << 16);
audio_sample_rates.push_back(44100 << 16);
audio_sample_sizes.push_back(8);
audio_sample_sizes.push_back(16);
audio_channel_counts.push_back(1);
audio_channel_counts.push_back(2);
// Default to highest supported values
audio_sample_rate_index = audio_sample_rates.size() - 1;
audio_sample_size_index = audio_sample_sizes.size() - 1;
audio_channel_count_index = audio_channel_counts.size() - 1;
}
// Sound buffer size = 4096 frames
audio_frames_per_block = 4096;
return true;