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 	if (ioctl(config->fd, SNDCTL_DSP_SETFMT, &config->format) < 0)  in oss_init()
119 	if (ioctl(config->fd, SNDCTL_DSP_CHANNELS, &config->audio_info.max_channels) < 0)  in oss_init()
123 	if (ioctl(config->fd, SNDCTL_DSP_SPEED, &config->sample_rate) < 0)  in oss_init()
127 	switch (config->format) {  in oss_init()
130 		config->sample_size = 1;  in oss_init()
136 		config->sample_size = 2;  in oss_init()
142 		config->sample_size = 3;  in oss_init()
150 		config->sample_size = 4;  in oss_init()
153 		errx(1, "Invalid audio format %d", config->format);  in oss_init()
177 	config->buffer_info.fragments = 2;  in oss_init()
178 	tmp = size2exp(config->sample_size * config->audio_info.max_channels);  in oss_init()
179 	tmp = ((config->buffer_info.fragments) << 16) | tmp;  in oss_init()
180 	if (ioctl(config->fd, SNDCTL_DSP_SETFRAGMENT, &tmp) < 0)  in oss_init()
184 	if ((config->mode & O_ACCMODE) == O_RDONLY)  in oss_init()
186 	if (ioctl(config->fd, request, &config->buffer_info) < 0)  in oss_init()
188 	if (config->buffer_info.fragments < 1)  in oss_init()
189 		config->buffer_info.fragments = config->buffer_info.fragstotal;  in oss_init()
190 	if (config->buffer_info.bytes < 1)  in oss_init()
191 		config->buffer_info.bytes = config->buffer_info.fragstotal * config->buffer_info.fragsize;  in oss_init()
192 	if (config->buffer_info.bytes < 1) {  in oss_init()
194 		    config->buffer_info.bytes);  in oss_init()
196 	config->sample_count = config->buffer_info.bytes / config->sample_size;  in oss_init()
197 	config->chsamples = config->sample_count / config->audio_info.max_channels;  in oss_init()
201 	    config->buffer_info.bytes, config->buffer_info.fragments,  in oss_init()
202 	    config->buffer_info.fragsize, config->buffer_info.fragstotal,  in oss_init()
203 	    config->sample_count);  in oss_init()
206 	switch (config->mode & O_ACCMODE) {  in oss_init()
220 		errx(1, "Invalid mode %d", config->mode);  in oss_init()
225 	if (config->mmap) {  in oss_init()
226 		config->buf = mmap(NULL, config->buffer_info.bytes, prot, MAP_SHARED, config->fd, 0);  in oss_init()
227 		if (config->buf == MAP_FAILED)  in oss_init()
230 		if ((config->buf = malloc(config->buffer_info.bytes)) == NULL)  in oss_init()
235 	if (ioctl(config->fd, SNDCTL_DSP_SETTRIGGER, &tmp) < 0)  in oss_init()