- import version 0.9.1 from upstream

1 files changed, 168 insertions, 0 deletions

diff --git a/src/lingot-audio-oss.c b/src/lingot-audio-oss.c
new file mode 100644
index 0000000..ee43ae6
--- /dev/null
+++ b/src/lingot-audio-oss.c
@@ -0,0 +1,168 @@
+/*
+ * lingot, a musical instrument tuner.
+ *
+ * Copyright (C) 2004-2011  Ibán Cereijo Graña, Jairo Chapela Martínez.
+ *
+ * This file is part of lingot.
+ *
+ * lingot is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * lingot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with lingot; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <sys/soundcard.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "lingot-msg.h"
+#include "lingot-defs.h"
+#include "lingot-audio-oss.h"
+#include "lingot-i18n.h"
+
+LingotAudioHandler* lingot_audio_oss_new(char* device, int sample_rate) {
+
+	int channels = 1;
+	int format = SAMPLE_FORMAT;
+	char error_message[100];
+	const char* exception;
+
+	LingotAudioHandler* audio = malloc(sizeof(LingotAudioHandler));
+
+	audio->audio_system = AUDIO_SYSTEM_OSS;
+	audio->dsp = open(device, O_RDONLY);
+	audio->read_buffer_size = 128; // TODO: size up
+	strcpy(audio->device, device);
+
+	try {
+
+		if (audio->dsp < 0) {
+			sprintf(error_message, _("Unable to open audio device %s.\n%s."),
+					device, strerror(errno));
+			throw(error_message);
+		}
+
+		//if (ioctl(audio->dsp, SOUND_PCM_READ_CHANNELS, &channels) < 0)
+		if (ioctl(audio->dsp, SNDCTL_DSP_CHANNELS, &channels) < 0) {
+			sprintf(error_message, _("Error setting number of channels.\n%s."),
+					strerror(errno));
+			throw(error_message);
+		}
+
+		// sample size
+		//if (ioctl(audio->dsp, SOUND_PCM_SETFMT, &format) < 0)
+		if (ioctl(audio->dsp, SNDCTL_DSP_SETFMT, &format) < 0) {
+			sprintf(error_message, _("Error setting bits per sample.\n%s."),
+					strerror(errno));
+			throw(error_message);
+		}
+
+		int fragment_size = 1;
+		int DMA_buffer_size = 512;
+		int param = 0;
+
+		for (param = 0; fragment_size < DMA_buffer_size; param++)
+			fragment_size <<= 1;
+
+		param |= 0x00ff0000;
+
+		if (ioctl(audio->dsp, SNDCTL_DSP_SETFRAGMENT, &param) < 0) {
+			sprintf(error_message, _("Error setting DMA buffer size.\n%s."),
+					strerror(errno));
+			throw(error_message);
+		}
+
+		if (ioctl(audio->dsp, SNDCTL_DSP_SPEED, &sample_rate) < 0) {
+			sprintf(error_message, _("Error setting sample rate.\n%s."),
+					strerror(errno));
+			throw(error_message);
+		}
+
+		audio->real_sample_rate = sample_rate;
+		audio->read_buffer = malloc(audio->read_buffer_size
+				* sizeof(SAMPLE_TYPE));
+		memset(audio->read_buffer, 0, audio->read_buffer_size
+				* sizeof(SAMPLE_TYPE));
+
+	} catch {
+		close(audio->dsp);
+		free(audio);
+		audio = NULL;
+		lingot_msg_add_error(exception);
+	}
+
+	return audio;
+}
+
+void lingot_audio_oss_destroy(LingotAudioHandler* audio) {
+	if (audio != NULL) {
+		close(audio->dsp);
+		free(audio->read_buffer);
+	}
+}
+
+int lingot_audio_oss_read(LingotAudioHandler* audio) {
+	int i;
+	int read_size;
+
+	read_size = read(audio->dsp, audio->read_buffer, audio->read_buffer_size
+			* sizeof(SAMPLE_TYPE));
+
+	//	if (rand() < 0.001 * RAND_MAX)
+	//		read_size = 0;
+
+	if (read_size != audio->read_buffer_size * sizeof(SAMPLE_TYPE)) {
+		char buff[100];
+		sprintf(buff, _("Read from audio interface failed.\n%s."), strerror(
+				errno));
+		lingot_msg_add_error(buff);
+		return -1;
+	}
+
+	// float point conversion
+	for (i = 0; i < audio->read_buffer_size; i++) {
+		audio->flt_read_buffer[i] = audio->read_buffer[i];
+	}
+
+	return 0;
+}
+
+LingotAudioSystemProperties* lingot_audio_oss_get_audio_system_properties(
+		audio_system_t audio_system) {
+
+	LingotAudioSystemProperties* result =
+			(LingotAudioSystemProperties*) malloc(1
+					* sizeof(LingotAudioSystemProperties));
+
+	// TODO
+	result->forced_sample_rate = 0;
+	result->n_devices = 0;
+	result->devices = NULL;
+
+	result->n_sample_rates = 5;
+	result->sample_rates = malloc(result->n_sample_rates * sizeof(int));
+	result->sample_rates[0] = 8000;
+	result->sample_rates[1] = 11025;
+	result->sample_rates[2] = 22050;
+	result->sample_rates[3] = 44100;
+	result->sample_rates[4] = 48000;
+
+	return result;
+}
+