42 void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile* profile,  in proxy_prepare()  argument
47     proxy->profile = profile;  in proxy_prepare()
54         proxy->alsa_config.format = config->format;  in proxy_prepare()
58         proxy->alsa_config.format = profile->default_config.format;  in proxy_prepare()
62         proxy->alsa_config.rate = config->rate;  in proxy_prepare()
66         proxy->alsa_config.rate = profile->default_config.rate;  in proxy_prepare()
70         proxy->alsa_config.channels = config->channels;  in proxy_prepare()
72         proxy->alsa_config.channels = profile_get_closest_channel_count(profile, config->channels);  in proxy_prepare()
74               config->channels, proxy->alsa_config.channels);  in proxy_prepare()
77     proxy->alsa_config.period_count = profile->default_config.period_count;  in proxy_prepare()
78     proxy->alsa_config.period_size =  in proxy_prepare()
79             profile_get_period_size(proxy->profile, proxy->alsa_config.rate);  in proxy_prepare()
84     if (proxy->alsa_config.period_count == 0) {  in proxy_prepare()
85         proxy->alsa_config.period_count = 4;  in proxy_prepare()
88     proxy->pcm = NULL;  in proxy_prepare()
91         proxy->frame_size = format_byte_size_map[config->format] * proxy->alsa_config.channels;  in proxy_prepare()
93         proxy->frame_size = 1;  in proxy_prepare()
97 int proxy_open(alsa_device_proxy * proxy)  in proxy_open()  argument
99     alsa_device_profile* profile = proxy->profile;  in proxy_open()
107     proxy->pcm = pcm_open(profile->card, profile->device,  in proxy_open()
108             profile->direction | PCM_MONOTONIC, &proxy->alsa_config);  in proxy_open()
109     if (proxy->pcm == NULL) {  in proxy_open()
113     if (!pcm_is_ready(proxy->pcm)) {  in proxy_open()
114         ALOGE("  proxy_open() pcm_open() failed: %s", pcm_get_error(proxy->pcm));  in proxy_open()
116         log_pcm_config(&proxy->alsa_config, "config");  in proxy_open()
118         pcm_close(proxy->pcm);  in proxy_open()
119         proxy->pcm = NULL;  in proxy_open()
126 void proxy_close(alsa_device_proxy * proxy)  in proxy_close()  argument
128     ALOGV("proxy_close() [pcm:%p]", proxy->pcm);  in proxy_close()
130     if (proxy->pcm != NULL) {  in proxy_close()
131         pcm_close(proxy->pcm);  in proxy_close()
132         proxy->pcm = NULL;  in proxy_close()
139 unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy)  in proxy_get_sample_rate()  argument
141     return proxy->alsa_config.rate;  in proxy_get_sample_rate()
147 enum pcm_format proxy_get_format(const alsa_device_proxy * proxy)  in proxy_get_format()  argument
149     return proxy->alsa_config.format;  in proxy_get_format()
155 unsigned proxy_get_channel_count(const alsa_device_proxy * proxy)  in proxy_get_channel_count()  argument
157     return proxy->alsa_config.channels;  in proxy_get_channel_count()
163 unsigned int proxy_get_period_size(const alsa_device_proxy * proxy)  in proxy_get_period_size()  argument
165     return proxy->alsa_config.period_size;  in proxy_get_period_size()
168 unsigned int proxy_get_period_count(const alsa_device_proxy * proxy)  in proxy_get_period_count()  argument
170     return proxy->alsa_config.period_count;  in proxy_get_period_count()
173 unsigned proxy_get_latency(const alsa_device_proxy * proxy)  in proxy_get_latency()  argument
175     return (proxy_get_period_size(proxy) * proxy_get_period_count(proxy) * 1000)  in proxy_get_latency()
176                / proxy_get_sample_rate(proxy);  in proxy_get_latency()
179 int proxy_get_presentation_position(const alsa_device_proxy * proxy,  in proxy_get_presentation_position()  argument
184     if (proxy->pcm != NULL  in proxy_get_presentation_position()
185             && pcm_get_htimestamp(proxy->pcm, &avail, timestamp) == 0) {  in proxy_get_presentation_position()
187                 proxy->alsa_config.period_size * proxy->alsa_config.period_count;  in proxy_get_presentation_position()
191             int64_t signed_frames = proxy->transferred - kernel_buffer_size + avail;  in proxy_get_presentation_position()
207 int proxy_write(alsa_device_proxy * proxy, const void *data, unsigned int count)  in proxy_write()  argument
209     int ret = pcm_write(proxy->pcm, data, count);  in proxy_write()
211         proxy->transferred += count / proxy->frame_size;  in proxy_write()
216 int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count)  in proxy_read()  argument
218     return pcm_read(proxy->pcm, data, count);  in proxy_read()
224 void proxy_dump(const alsa_device_proxy* proxy, int fd)  in proxy_dump()  argument
226     if (proxy != NULL) {  in proxy_dump()
227         dprintf(fd, "  channels: %d\n", proxy->alsa_config.channels);  in proxy_dump()
228         dprintf(fd, "  rate: %d\n", proxy->alsa_config.rate);  in proxy_dump()
229         dprintf(fd, "  period_size: %d\n", proxy->alsa_config.period_size);  in proxy_dump()
230         dprintf(fd, "  period_count: %d\n", proxy->alsa_config.period_count);  in proxy_dump()
231         dprintf(fd, "  format: %d\n", proxy->alsa_config.format);  in proxy_dump()