diff options
Diffstat (limited to 'modules/usbaudio/alsa_device_profile.c')
| -rw-r--r-- | modules/usbaudio/alsa_device_profile.c | 497 |
1 files changed, 0 insertions, 497 deletions
diff --git a/modules/usbaudio/alsa_device_profile.c b/modules/usbaudio/alsa_device_profile.c deleted file mode 100644 index 8e84471..0000000 --- a/modules/usbaudio/alsa_device_profile.c +++ /dev/null @@ -1,497 +0,0 @@ -/* - * Copyright (C) 2014 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#define LOG_TAG "alsa_device_profile" -/*#define LOG_NDEBUG 0*/ -/*#define LOG_PCM_PARAMS 0*/ - -#include <errno.h> -#include <inttypes.h> -#include <stdint.h> -#include <stdlib.h> - -#include <log/log.h> - -#include "alsa_device_profile.h" -#include "format.h" -#include "logging.h" - -#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) - -/*TODO - Evaluate if this value should/can be retrieved from a device-specific property */ -#define BUFF_DURATION_MS 5 - -#define DEFAULT_PERIOD_SIZE 1024 - -static const char * const format_string_map[] = { - "AUDIO_FORMAT_PCM_16_BIT", /* "PCM_FORMAT_S16_LE", */ - "AUDIO_FORMAT_PCM_32_BIT", /* "PCM_FORMAT_S32_LE", */ - "AUDIO_FORMAT_PCM_8_BIT", /* "PCM_FORMAT_S8", */ - "AUDIO_FORMAT_PCM_8_24_BIT", /* "PCM_FORMAT_S24_LE", */ - "AUDIO_FORMAT_PCM_24_BIT_PACKED"/* "PCM_FORMAT_S24_3LE" */ -}; - -static const unsigned const format_byte_size_map[] = { - 2, /* PCM_FORMAT_S16_LE */ - 4, /* PCM_FORMAT_S32_LE */ - 1, /* PCM_FORMAT_S8 */ - 4, /* PCM_FORMAT_S24_LE */ - 3, /* PCM_FORMAT_S24_3LE */ -}; - -extern int8_t const pcm_format_value_map[50]; - -/* sort these highest -> lowest (to default to best quality) */ -static const unsigned std_sample_rates[] = - {48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000}; - -static void profile_reset(alsa_device_profile* profile) -{ - profile->card = profile->device = -1; - - /* Fill the attribute arrays with invalid values */ - size_t index; - for (index = 0; index < ARRAY_SIZE(profile->formats); index++) { - profile->formats[index] = PCM_FORMAT_INVALID; - } - - for (index = 0; index < ARRAY_SIZE(profile->sample_rates); index++) { - profile->sample_rates[index] = 0; - } - - for (index = 0; index < ARRAY_SIZE(profile->channel_counts); index++) { - profile->channel_counts[index] = 0; - } - - profile->min_period_size = profile->max_period_size = 0; - profile->min_channel_count = profile->max_channel_count = DEFAULT_CHANNEL_COUNT; - - profile->is_valid = false; -} - -void profile_init(alsa_device_profile* profile, int direction) -{ - profile->direction = direction; - profile_reset(profile); -} - -bool profile_is_initialized(alsa_device_profile* profile) -{ - return profile->card >= 0 && profile->device >= 0; -} - -bool profile_is_valid(alsa_device_profile* profile) { - return profile->is_valid; -} - -bool profile_is_cached_for(alsa_device_profile* profile, int card, int device) { - return card == profile->card && device == profile->device; -} - -void profile_decache(alsa_device_profile* profile) { - profile_reset(profile); -} - -/* - * Returns the supplied value rounded up to the next even multiple of 16 - */ -static unsigned int round_to_16_mult(unsigned int size) -{ - return (size + 15) & ~15; // 0xFFFFFFF0; -} - -/* - * Returns the system defined minimum period size based on the supplied sample rate. - */ -unsigned profile_calc_min_period_size(alsa_device_profile* profile, unsigned sample_rate) -{ - ALOGV("profile_calc_min_period_size(%p, rate:%d)", profile, sample_rate); - if (profile == NULL) { - return DEFAULT_PERIOD_SIZE; - } else { - unsigned num_sample_frames = (sample_rate * BUFF_DURATION_MS) / 1000; - if (num_sample_frames < profile->min_period_size) { - num_sample_frames = profile->min_period_size; - } - return round_to_16_mult(num_sample_frames) * 2; - } -} - -unsigned int profile_get_period_size(alsa_device_profile* profile, unsigned sample_rate) -{ - // return profile->default_config.period_size; - unsigned int period_size = profile_calc_min_period_size(profile, sample_rate); - ALOGV("profile_get_period_size(rate:%d) = %d", sample_rate, period_size); - return period_size; -} - -/* - * Sample Rate - */ -unsigned profile_get_default_sample_rate(alsa_device_profile* profile) -{ - /* - * TODO this won't be right in general. we should store a preferred rate as we are scanning. - * But right now it will return the highest rate, which may be correct. - */ - return profile_is_valid(profile) ? profile->sample_rates[0] : DEFAULT_SAMPLE_RATE; -} - -bool profile_is_sample_rate_valid(alsa_device_profile* profile, unsigned rate) -{ - if (profile_is_valid(profile)) { - size_t index; - for (index = 0; profile->sample_rates[index] != 0; index++) { - if (profile->sample_rates[index] == rate) { - return true; - } - } - - return false; - } else { - return rate == DEFAULT_SAMPLE_RATE; - } -} - -/* - * Format - */ -enum pcm_format profile_get_default_format(alsa_device_profile* profile) -{ - /* - * TODO this won't be right in general. we should store a preferred format as we are scanning. - */ - return profile_is_valid(profile) ? profile->formats[0] : DEFAULT_SAMPLE_FORMAT; -} - -bool profile_is_format_valid(alsa_device_profile* profile, enum pcm_format fmt) { - if (profile_is_valid(profile)) { - size_t index; - for (index = 0; profile->formats[index] != PCM_FORMAT_INVALID; index++) { - if (profile->formats[index] == fmt) { - return true; - } - } - - return false; - } else { - return fmt == DEFAULT_SAMPLE_FORMAT; - } -} - -/* - * Channels - */ -unsigned profile_get_default_channel_count(alsa_device_profile* profile) -{ - return profile_is_valid(profile) ? profile->channel_counts[0] : DEFAULT_CHANNEL_COUNT; -} - -bool profile_is_channel_count_valid(alsa_device_profile* profile, unsigned count) -{ - if (profile_is_initialized(profile)) { - return count >= profile->min_channel_count && count <= profile->max_channel_count; - } else { - return count == DEFAULT_CHANNEL_COUNT; - } -} - -static bool profile_test_sample_rate(alsa_device_profile* profile, unsigned rate) -{ - struct pcm_config config = profile->default_config; - config.rate = rate; - - bool works = false; /* let's be pessimistic */ - struct pcm * pcm = pcm_open(profile->card, profile->device, - profile->direction, &config); - - if (pcm != NULL) { - works = pcm_is_ready(pcm); - pcm_close(pcm); - } - - return works; -} - -static unsigned profile_enum_sample_rates(alsa_device_profile* profile, unsigned min, unsigned max) -{ - unsigned num_entries = 0; - unsigned index; - - for (index = 0; index < ARRAY_SIZE(std_sample_rates) && - num_entries < ARRAY_SIZE(profile->sample_rates) - 1; - index++) { - if (std_sample_rates[index] >= min && std_sample_rates[index] <= max - && profile_test_sample_rate(profile, std_sample_rates[index])) { - profile->sample_rates[num_entries++] = std_sample_rates[index]; - } - } - - return num_entries; /* return # of supported rates */ -} - -static unsigned profile_enum_sample_formats(alsa_device_profile* profile, struct pcm_mask * mask) -{ - const int num_slots = ARRAY_SIZE(mask->bits); - const int bits_per_slot = sizeof(mask->bits[0]) * 8; - - const int table_size = ARRAY_SIZE(pcm_format_value_map); - - int slot_index, bit_index, table_index; - table_index = 0; - int num_written = 0; - for (slot_index = 0; slot_index < num_slots && table_index < table_size; - slot_index++) { - unsigned bit_mask = 1; - for (bit_index = 0; - bit_index < bits_per_slot && table_index < table_size; - bit_index++) { - if ((mask->bits[slot_index] & bit_mask) != 0) { - enum pcm_format format = pcm_format_value_map[table_index]; - /* Never return invalid (unrecognized) or 8-bit */ - if (format != PCM_FORMAT_INVALID && format != PCM_FORMAT_S8) { - profile->formats[num_written++] = format; - if (num_written == ARRAY_SIZE(profile->formats) - 1) { - /* leave at least one PCM_FORMAT_INVALID at the end */ - return num_written; - } - } - } - bit_mask <<= 1; - table_index++; - } - } - - return num_written; -} - -static unsigned profile_enum_channel_counts(alsa_device_profile* profile, unsigned min, unsigned max) -{ - static const unsigned std_channel_counts[] = {8, 4, 2, 1}; - - unsigned num_counts = 0; - unsigned index; - /* TODO write a profile_test_channel_count() */ - /* Ensure there is at least one invalid channel count to terminate the channel counts array */ - for (index = 0; index < ARRAY_SIZE(std_channel_counts) && - num_counts < ARRAY_SIZE(profile->channel_counts) - 1; - index++) { - /* TODO Do we want a channel counts test? */ - if (std_channel_counts[index] >= min && std_channel_counts[index] <= max /* && - profile_test_channel_count(profile, channel_counts[index])*/) { - profile->channel_counts[num_counts++] = std_channel_counts[index]; - } - } - - return num_counts; /* return # of supported counts */ -} - -/* - * Reads and decodes configuration info from the specified ALSA card/device. - */ -static int read_alsa_device_config(alsa_device_profile * profile, struct pcm_config * config) -{ - ALOGV("usb:audio_hw - read_alsa_device_config(c:%d d:%d t:0x%X)", - profile->card, profile->device, profile->direction); - - if (profile->card < 0 || profile->device < 0) { - return -EINVAL; - } - - struct pcm_params * alsa_hw_params = - pcm_params_get(profile->card, profile->device, profile->direction); - if (alsa_hw_params == NULL) { - return -EINVAL; - } - - profile->min_period_size = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_SIZE); - profile->max_period_size = pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_SIZE); - - profile->min_channel_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS); - profile->max_channel_count = pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS); - - int ret = 0; - - /* - * This Logging will be useful when testing new USB devices. - */ -#ifdef LOG_PCM_PARAMS - log_pcm_params(alsa_hw_params); -#endif - - config->channels = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS); - config->rate = pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE); - config->period_size = profile_calc_min_period_size(profile, config->rate); - config->period_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIODS); - config->format = get_pcm_format_for_mask(pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT)); -#ifdef LOG_PCM_PARAMS - log_pcm_config(config, "read_alsa_device_config"); -#endif - if (config->format == PCM_FORMAT_INVALID) { - ret = -EINVAL; - } - - pcm_params_free(alsa_hw_params); - - return ret; -} - -bool profile_read_device_info(alsa_device_profile* profile) -{ - if (!profile_is_initialized(profile)) { - return false; - } - - /* let's get some defaults */ - read_alsa_device_config(profile, &profile->default_config); - ALOGV("default_config chans:%d rate:%d format:%d count:%d size:%d", - profile->default_config.channels, profile->default_config.rate, - profile->default_config.format, profile->default_config.period_count, - profile->default_config.period_size); - - struct pcm_params * alsa_hw_params = pcm_params_get(profile->card, - profile->device, - profile->direction); - if (alsa_hw_params == NULL) { - return false; - } - - /* Formats */ - struct pcm_mask * format_mask = pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT); - profile_enum_sample_formats(profile, format_mask); - - /* Channels */ - profile_enum_channel_counts( - profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS), - pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS)); - - /* Sample Rates */ - profile_enum_sample_rates( - profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE), - pcm_params_get_max(alsa_hw_params, PCM_PARAM_RATE)); - - profile->is_valid = true; - - return true; -} - -char * profile_get_sample_rate_strs(alsa_device_profile* profile) -{ - char buffer[128]; - buffer[0] = '\0'; - int buffSize = ARRAY_SIZE(buffer); - - char numBuffer[32]; - - int numEntries = 0; - unsigned index; - for (index = 0; profile->sample_rates[index] != 0; index++) { - if (numEntries++ != 0) { - strncat(buffer, "|", buffSize); - } - snprintf(numBuffer, sizeof(numBuffer), "%u", profile->sample_rates[index]); - strncat(buffer, numBuffer, buffSize); - } - - return strdup(buffer); -} - -char * profile_get_format_strs(alsa_device_profile* profile) -{ - /* TODO remove this hack when we have support for input in non PCM16 formats */ - if (profile->direction == PCM_IN) { - return strdup("AUDIO_FORMAT_PCM_16_BIT"); - } - - char buffer[128]; - buffer[0] = '\0'; - int buffSize = ARRAY_SIZE(buffer); - - int numEntries = 0; - unsigned index = 0; - for (index = 0; profile->formats[index] != PCM_FORMAT_INVALID; index++) { - if (numEntries++ != 0) { - strncat(buffer, "|", buffSize); - } - strncat(buffer, format_string_map[profile->formats[index]], buffSize); - } - - return strdup(buffer); -} - -char * profile_get_channel_count_strs(alsa_device_profile* profile) -{ - static const char * const out_chans_strs[] = { - /* 0 */"AUDIO_CHANNEL_NONE", /* will never be taken as this is a terminator */ - /* 1 */"AUDIO_CHANNEL_OUT_MONO", - /* 2 */"AUDIO_CHANNEL_OUT_STEREO", - /* 3 */ /* "AUDIO_CHANNEL_OUT_STEREO|AUDIO_CHANNEL_OUT_FRONT_CENTER" */ NULL, - /* 4 */"AUDIO_CHANNEL_OUT_QUAD", - /* 5 */ /* "AUDIO_CHANNEL_OUT_QUAD|AUDIO_CHANNEL_OUT_FRONT_CENTER" */ NULL, - /* 6 */"AUDIO_CHANNEL_OUT_5POINT1", - /* 7 */ /* "AUDIO_CHANNEL_OUT_5POINT1|AUDIO_CHANNEL_OUT_BACK_CENTER" */ NULL, - /* 8 */"AUDIO_CHANNEL_OUT_7POINT1", - /* channel counts greater than this not considered */ - }; - - static const char * const in_chans_strs[] = { - /* 0 */"AUDIO_CHANNEL_NONE", /* will never be taken as this is a terminator */ - /* 1 */"AUDIO_CHANNEL_IN_MONO", - /* 2 */"AUDIO_CHANNEL_IN_STEREO", - /* channel counts greater than this not considered */ - }; - - const bool isOutProfile = profile->direction == PCM_OUT; - - const char * const * const names_array = isOutProfile ? out_chans_strs : in_chans_strs; - const size_t names_size = isOutProfile ? ARRAY_SIZE(out_chans_strs) - : ARRAY_SIZE(in_chans_strs); - - char buffer[256]; /* caution, may need to be expanded */ - buffer[0] = '\0'; - const int buffer_size = ARRAY_SIZE(buffer); - int num_entries = 0; - /* We currently support MONO and STEREO, and always report STEREO but some (many) - * USB Audio Devices may only announce support for MONO (a headset mic for example), or - * The total number of output channels. SO, if the device itself doesn't explicitly - * support STEREO, append to the channel config strings we are generating. - */ - bool stereo_present = false; - unsigned index; - unsigned channel_count; - - for (index = 0; (channel_count = profile->channel_counts[index]) != 0; index++) { - stereo_present = stereo_present || channel_count == 2; - if (channel_count < names_size && names_array[channel_count] != NULL) { - if (num_entries++ != 0) { - strncat(buffer, "|", buffer_size); - } - strncat(buffer, names_array[channel_count], buffer_size); - } - } - - /* emulated modes: - * always expose stereo as we can emulate it for PCM_OUT - */ - if (!stereo_present) { - if (num_entries++ != 0) { - strncat(buffer, "|", buffer_size); - } - strncat(buffer, names_array[2], buffer_size); /* stereo */ - } - - return strdup(buffer); -} |