42 struct config {  struct
85 oss_init(struct config *config)  in oss_init()  argument
90 	if ((config->fd = open(config->device, config->mode)) < 0)  in oss_init()
91 		err(1, "Error opening the device %s", config->device);  in oss_init()
94 	if (ioctl(config->fd, SNDCTL_ENGINEINFO, &config->audio_info) < 0)  in oss_init()
98 	if (ioctl(config->fd, SNDCTL_DSP_GETCAPS, &config->audio_info.caps) < 0)  in oss_init()
102 	if (!(config->audio_info.caps & PCM_CAP_TRIGGER))  in oss_init()
106 	if (config->mmap) {  in oss_init()
107 		if (!(config->audio_info.caps & PCM_CAP_MMAP))  in oss_init()
110 		if (ioctl(config->fd, SNDCTL_DSP_COOKEDMODE, &tmp) < 0)  in oss_init()
115 	tmp = config->format;  in oss_init()
116 	if (ioctl(config->fd, SNDCTL_DSP_SETFMT, &tmp) < 0)  in oss_init()
118 	if (tmp != config->format)  in oss_init()
119 		warnx("Format: requested=%08x, got=%08x", config->format, tmp);  in oss_init()
120 	config->format = tmp;  in oss_init()
123 	tmp = config->audio_info.max_channels;  in oss_init()
124 	if (ioctl(config->fd, SNDCTL_DSP_CHANNELS, &tmp) < 0)  in oss_init()
126 	if (tmp != config->audio_info.max_channels)  in oss_init()
127 		warnx("Channels: requested=%d, got=%d", config->audio_info.max_channels, tmp);  in oss_init()
128 	config->audio_info.max_channels = tmp;  in oss_init()
131 	tmp = config->sample_rate;  in oss_init()
132 	if (ioctl(config->fd, SNDCTL_DSP_SPEED, &config->sample_rate) < 0)  in oss_init()
134 	if (tmp != config->sample_rate)  in oss_init()
135 		warnx("Sample rate: requested=%d, got=%d", config->sample_rate, tmp);  in oss_init()
136 	config->sample_rate = tmp;  in oss_init()
139 	switch (config->format) {  in oss_init()
142 		config->sample_size = 1;  in oss_init()
148 		config->sample_size = 2;  in oss_init()
154 		config->sample_size = 3;  in oss_init()
162 		config->sample_size = 4;  in oss_init()
165 		errx(1, "Invalid audio format %d", config->format);  in oss_init()
189 	config->buffer_info.fragments = 2;  in oss_init()
190 	tmp = size2exp(config->sample_size * config->audio_info.max_channels);  in oss_init()
191 	tmp = ((config->buffer_info.fragments) << 16) | tmp;  in oss_init()
192 	if (ioctl(config->fd, SNDCTL_DSP_SETFRAGMENT, &tmp) < 0)  in oss_init()
196 	if ((config->mode & O_ACCMODE) == O_RDONLY)  in oss_init()
198 	if (ioctl(config->fd, request, &config->buffer_info) < 0)  in oss_init()
200 	if (config->buffer_info.fragments < 1)  in oss_init()
201 		config->buffer_info.fragments = config->buffer_info.fragstotal;  in oss_init()
202 	if (config->buffer_info.bytes < 1)  in oss_init()
203 		config->buffer_info.bytes = config->buffer_info.fragstotal * config->buffer_info.fragsize;  in oss_init()
204 	if (config->buffer_info.bytes < 1) {  in oss_init()
206 		    config->buffer_info.bytes);  in oss_init()
208 	config->sample_count = config->buffer_info.bytes / config->sample_size;  in oss_init()
209 	config->chsamples = config->sample_count / config->audio_info.max_channels;  in oss_init()
214 	    config->buffer_info.bytes, config->buffer_info.fragments,  in oss_init()
215 	    config->buffer_info.fragsize, config->buffer_info.fragstotal,  in oss_init()
216 	    config->sample_count, config->audio_info.max_channels,  in oss_init()
217 	    config->sample_size, config->sample_rate, config->format);  in oss_init()
220 	switch (config->mode & O_ACCMODE) {  in oss_init()
234 		errx(1, "Invalid mode %d", config->mode);  in oss_init()
239 	if (config->mmap) {  in oss_init()
240 		config->buf = mmap(NULL, config->buffer_info.bytes, prot, MAP_SHARED, config->fd, 0);  in oss_init()
241 		if (config->buf == MAP_FAILED)  in oss_init()
244 		if ((config->buf = malloc(config->buffer_info.bytes)) == NULL)  in oss_init()
249 	if (ioctl(config->fd, SNDCTL_DSP_SETTRIGGER, &tmp) < 0)  in oss_init()