46 int proxy_prepare(alsa_device_proxy * proxy, const alsa_device_profile* profile,  in proxy_prepare()  argument
53     proxy->profile = profile;  in proxy_prepare()
60         proxy->alsa_config.format = config->format;  in proxy_prepare()
62         proxy->alsa_config.format = profile->default_config.format;  in proxy_prepare()
72         proxy->alsa_config.rate = config->rate;  in proxy_prepare()
74         proxy->alsa_config.rate = profile->default_config.rate;  in proxy_prepare()
84         proxy->alsa_config.channels = config->channels;  in proxy_prepare()
86         proxy->alsa_config.channels = profile_get_closest_channel_count(profile, config->channels);  in proxy_prepare()
88               config->channels, proxy->alsa_config.channels);  in proxy_prepare()
95     proxy->alsa_config.period_count = profile->default_config.period_count;  in proxy_prepare()
96     proxy->alsa_config.period_size =  in proxy_prepare()
97             profile_get_period_size(proxy->profile, proxy->alsa_config.rate);  in proxy_prepare()
102     if (proxy->alsa_config.period_count == 0) {  in proxy_prepare()
103         proxy->alsa_config.period_count = 4;  in proxy_prepare()
106     proxy->pcm = NULL;  in proxy_prepare()
109         proxy->frame_size = format_byte_size_map[config->format] * proxy->alsa_config.channels;  in proxy_prepare()
111         proxy->frame_size = 1;  in proxy_prepare()
117     int max_rate_index = proxy_scan_rates(proxy, profile->sample_rates);  in proxy_prepare()
119         if (proxy->alsa_config.rate > profile->sample_rates[max_rate_index]) {  in proxy_prepare()
121                   proxy->alsa_config.rate, profile->sample_rates[max_rate_index]);  in proxy_prepare()
122             proxy->alsa_config.rate = profile->sample_rates[max_rate_index];  in proxy_prepare()
129 int proxy_open(alsa_device_proxy * proxy)  in proxy_open()  argument
131     const alsa_device_profile* profile = proxy->profile;  in proxy_open()
139     proxy->pcm = pcm_open(profile->card, profile->device,  in proxy_open()
140             profile->direction | PCM_MONOTONIC, &proxy->alsa_config);  in proxy_open()
141     if (proxy->pcm == NULL) {  in proxy_open()
145     if (!pcm_is_ready(proxy->pcm)) {  in proxy_open()
146         ALOGE("  proxy_open() pcm_is_ready() failed: %s", pcm_get_error(proxy->pcm));  in proxy_open()
148         log_pcm_config(&proxy->alsa_config, "config");  in proxy_open()
150         pcm_close(proxy->pcm);  in proxy_open()
151         proxy->pcm = NULL;  in proxy_open()
158 void proxy_close(alsa_device_proxy * proxy)  in proxy_close()  argument
160     ALOGV("proxy_close() [pcm:%p]", proxy->pcm);  in proxy_close()
162     if (proxy->pcm != NULL) {  in proxy_close()
163         pcm_close(proxy->pcm);  in proxy_close()
164         proxy->pcm = NULL;  in proxy_close()
171 unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy)  in proxy_get_sample_rate()  argument
173     return proxy->alsa_config.rate;  in proxy_get_sample_rate()
179 enum pcm_format proxy_get_format(const alsa_device_proxy * proxy)  in proxy_get_format()  argument
181     return proxy->alsa_config.format;  in proxy_get_format()
187 unsigned proxy_get_channel_count(const alsa_device_proxy * proxy)  in proxy_get_channel_count()  argument
189     return proxy->alsa_config.channels;  in proxy_get_channel_count()
195 unsigned int proxy_get_period_size(const alsa_device_proxy * proxy)  in proxy_get_period_size()  argument
197     return proxy->alsa_config.period_size;  in proxy_get_period_size()
200 unsigned int proxy_get_period_count(const alsa_device_proxy * proxy)  in proxy_get_period_count()  argument
202     return proxy->alsa_config.period_count;  in proxy_get_period_count()
205 unsigned proxy_get_latency(const alsa_device_proxy * proxy)  in proxy_get_latency()  argument
207     return (proxy_get_period_size(proxy) * proxy_get_period_count(proxy) * 1000)  in proxy_get_latency()
208                / proxy_get_sample_rate(proxy);  in proxy_get_latency()
211 int proxy_get_presentation_position(const alsa_device_proxy * proxy,  in proxy_get_presentation_position()  argument
216     if (proxy->pcm != NULL  in proxy_get_presentation_position()
217             && pcm_get_htimestamp(proxy->pcm, &avail, timestamp) == 0) {  in proxy_get_presentation_position()
219                 proxy->alsa_config.period_size * proxy->alsa_config.period_count;  in proxy_get_presentation_position()
223             int64_t signed_frames = proxy->transferred - kernel_buffer_size + avail;  in proxy_get_presentation_position()
236 int proxy_get_capture_position(const alsa_device_proxy * proxy,  in proxy_get_capture_position()  argument
243     if (proxy->pcm != NULL  in proxy_get_capture_position()
244             && pcm_get_htimestamp(proxy->pcm, &avail, &timestamp) == 0) {  in proxy_get_capture_position()
246                 proxy->alsa_config.period_size * proxy->alsa_config.period_count;  in proxy_get_capture_position()
250             *frames = proxy->transferred + avail;  in proxy_get_capture_position()
261 int proxy_write(alsa_device_proxy * proxy, const void *data, unsigned int count)  in proxy_write()  argument
263     int ret = pcm_write(proxy->pcm, data, count);  in proxy_write()
265         proxy->transferred += count / proxy->frame_size;  in proxy_write()
270 int proxy_read(alsa_device_proxy * proxy, void *data, unsigned int count)  in proxy_read()  argument
272     int ret = pcm_read(proxy->pcm, data, count);  in proxy_read()
274         proxy->transferred += count / proxy->frame_size;  in proxy_read()
282 void proxy_dump(const alsa_device_proxy* proxy, int fd)  in proxy_dump()  argument
284     if (proxy != NULL) {  in proxy_dump()
285         dprintf(fd, "  channels: %d\n", proxy->alsa_config.channels);  in proxy_dump()
286         dprintf(fd, "  rate: %d\n", proxy->alsa_config.rate);  in proxy_dump()
287         dprintf(fd, "  period_size: %d\n", proxy->alsa_config.period_size);  in proxy_dump()
288         dprintf(fd, "  period_count: %d\n", proxy->alsa_config.period_count);  in proxy_dump()
289         dprintf(fd, "  format: %d\n", proxy->alsa_config.format);  in proxy_dump()
293 int proxy_scan_rates(alsa_device_proxy * proxy, const unsigned sample_rates[]) {  in proxy_scan_rates()  argument
294     const alsa_device_profile* profile = proxy->profile;  in proxy_scan_rates()
300     memcpy(&alsa_config, &proxy->alsa_config, sizeof(alsa_config));  in proxy_scan_rates()