X-Git-Url: https://git.sesse.net/?p=nageru;a=blobdiff_plain;f=alsa_input.cpp;h=08a67f7fa7837ccabeb18a414eeaacf61d404bb3;hp=22daf760b026cb8c27cd8b4604ab41488667f345;hb=4e3c52ba57c4552a969e71ccdefd9941ce8d6290;hpb=2181f089c675f074b4b5060100dd473714d48cd4 diff --git a/alsa_input.cpp b/alsa_input.cpp index 22daf76..08a67f7 100644 --- a/alsa_input.cpp +++ b/alsa_input.cpp @@ -1,28 +1,66 @@ - #include "alsa_input.h" +#include +#include +#include +#include +#include +#include + +#include "alsa_pool.h" +#include "bmusb/bmusb.h" +#include "timebase.h" + using namespace std; +using namespace std::chrono; +using namespace std::placeholders; + +#define RETURN_ON_ERROR(msg, expr) do { \ + int err = (expr); \ + if (err < 0) { \ + fprintf(stderr, "[%s] " msg ": %s\n", device.c_str(), snd_strerror(err)); \ + if (err == -ENODEV) return CaptureEndReason::DEVICE_GONE; \ + return CaptureEndReason::OTHER_ERROR; \ + } \ +} while (false) -ALSAInput::ALSAInput(const char *device, unsigned sample_rate, unsigned num_channels, audio_callback_t audio_callback) - : device(device), sample_rate(sample_rate), num_channels(num_channels), audio_callback(audio_callback) +#define RETURN_FALSE_ON_ERROR(msg, expr) do { \ + int err = (expr); \ + if (err < 0) { \ + fprintf(stderr, "[%s] " msg ": %s\n", device.c_str(), snd_strerror(err)); \ + return false; \ + } \ +} while (false) + +#define WARN_ON_ERROR(msg, expr) do { \ + int err = (expr); \ + if (err < 0) { \ + fprintf(stderr, "[%s] " msg ": %s\n", device.c_str(), snd_strerror(err)); \ + } \ +} while (false) + +ALSAInput::ALSAInput(const char *device, unsigned sample_rate, unsigned num_channels, audio_callback_t audio_callback, ALSAPool *parent_pool, unsigned internal_dev_index) + : device(device), + sample_rate(sample_rate), + num_channels(num_channels), + audio_callback(audio_callback), + parent_pool(parent_pool), + internal_dev_index(internal_dev_index) { - die_on_error(device, snd_pcm_open(&pcm_handle,device, SND_PCM_STREAM_CAPTURE, 0)); +} + +bool ALSAInput::open_device() +{ + RETURN_FALSE_ON_ERROR("snd_pcm_open()", snd_pcm_open(&pcm_handle, device.c_str(), SND_PCM_STREAM_CAPTURE, 0)); // Set format. snd_pcm_hw_params_t *hw_params; snd_pcm_hw_params_alloca(&hw_params); - die_on_error("snd_pcm_hw_params_any()", snd_pcm_hw_params_any(pcm_handle, hw_params)); - die_on_error("snd_pcm_hw_params_set_access()", snd_pcm_hw_params_set_access(pcm_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)); - snd_pcm_format_mask_t *format_mask; - snd_pcm_format_mask_alloca(&format_mask); - snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S16_LE); - snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S24_LE); - snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S32_LE); - die_on_error("snd_pcm_hw_params_set_format()", snd_pcm_hw_params_set_format_mask(pcm_handle, hw_params, format_mask)); - die_on_error("snd_pcm_hw_params_set_rate_near()", snd_pcm_hw_params_set_rate_near(pcm_handle, hw_params, &sample_rate, 0)); - die_on_error("snd_pcm_hw_params_set_channels()", snd_pcm_hw_params_set_channels(pcm_handle, hw_params, num_channels)); + if (!set_base_params(device.c_str(), pcm_handle, hw_params, &sample_rate)) { + return false; + } - die_on_error("snd_pcm_hw_params_set_channels()", snd_pcm_hw_params_set_channels(pcm_handle, hw_params, num_channels)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_set_channels()", snd_pcm_hw_params_set_channels(pcm_handle, hw_params, num_channels)); // Fragment size of 64 samples (about 1 ms at 48 kHz; a frame at 60 // fps/48 kHz is 800 samples.) We ask for 64 such periods in our buffer @@ -34,19 +72,19 @@ ALSAInput::ALSAInput(const char *device, unsigned sample_rate, unsigned num_chan // I can't have a big buffer. num_periods = 16; int dir = 0; - die_on_error("snd_pcm_hw_params_set_periods_near()", snd_pcm_hw_params_set_periods_near(pcm_handle, hw_params, &num_periods, &dir)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_set_periods_near()", snd_pcm_hw_params_set_periods_near(pcm_handle, hw_params, &num_periods, &dir)); period_size = 64; dir = 0; - die_on_error("snd_pcm_hw_params_set_period_size_near()", snd_pcm_hw_params_set_period_size_near(pcm_handle, hw_params, &period_size, &dir)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_set_period_size_near()", snd_pcm_hw_params_set_period_size_near(pcm_handle, hw_params, &period_size, &dir)); buffer_frames = 64 * 64; - die_on_error("snd_pcm_hw_params_set_buffer_size_near()", snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hw_params, &buffer_frames)); - die_on_error("snd_pcm_hw_params()", snd_pcm_hw_params(pcm_handle, hw_params)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_set_buffer_size_near()", snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hw_params, &buffer_frames)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params()", snd_pcm_hw_params(pcm_handle, hw_params)); //snd_pcm_hw_params_free(hw_params); // Figure out which format the card actually chose. - die_on_error("snd_pcm_hw_params_current()", snd_pcm_hw_params_current(pcm_handle, hw_params)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_current()", snd_pcm_hw_params_current(pcm_handle, hw_params)); snd_pcm_format_t chosen_format; - die_on_error("snd_pcm_hw_params_get_format()", snd_pcm_hw_params_get_format(hw_params, &chosen_format)); + RETURN_FALSE_ON_ERROR("snd_pcm_hw_params_get_format()", snd_pcm_hw_params_get_format(hw_params, &chosen_format)); audio_format.num_channels = num_channels; audio_format.bits_per_sample = 0; @@ -63,6 +101,7 @@ ALSAInput::ALSAInput(const char *device, unsigned sample_rate, unsigned num_chan default: assert(false); } + audio_format.sample_rate = sample_rate; //printf("num_periods=%u period_size=%u buffer_frames=%u sample_rate=%u bits_per_sample=%d\n", // num_periods, unsigned(period_size), unsigned(buffer_frames), sample_rate, audio_format.bits_per_sample); @@ -70,36 +109,120 @@ ALSAInput::ALSAInput(const char *device, unsigned sample_rate, unsigned num_chan snd_pcm_sw_params_t *sw_params; snd_pcm_sw_params_alloca(&sw_params); - die_on_error("snd_pcm_sw_params_current()", snd_pcm_sw_params_current(pcm_handle, sw_params)); - die_on_error("snd_pcm_sw_params_set_start_threshold", snd_pcm_sw_params_set_start_threshold(pcm_handle, sw_params, num_periods * period_size / 2)); - die_on_error("snd_pcm_sw_params()", snd_pcm_sw_params(pcm_handle, sw_params)); + RETURN_FALSE_ON_ERROR("snd_pcm_sw_params_current()", snd_pcm_sw_params_current(pcm_handle, sw_params)); + RETURN_FALSE_ON_ERROR("snd_pcm_sw_params_set_start_threshold", snd_pcm_sw_params_set_start_threshold(pcm_handle, sw_params, num_periods * period_size / 2)); + RETURN_FALSE_ON_ERROR("snd_pcm_sw_params()", snd_pcm_sw_params(pcm_handle, sw_params)); - die_on_error("snd_pcm_nonblock()", snd_pcm_nonblock(pcm_handle, 1)); - die_on_error("snd_pcm_prepare()", snd_pcm_prepare(pcm_handle)); + RETURN_FALSE_ON_ERROR("snd_pcm_nonblock()", snd_pcm_nonblock(pcm_handle, 1)); + RETURN_FALSE_ON_ERROR("snd_pcm_prepare()", snd_pcm_prepare(pcm_handle)); + return true; +} + +bool ALSAInput::set_base_params(const char *device_name, snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hw_params, unsigned *sample_rate) +{ + int err; + err = snd_pcm_hw_params_any(pcm_handle, hw_params); + if (err < 0) { + fprintf(stderr, "[%s] snd_pcm_hw_params_any(): %s\n", device_name, snd_strerror(err)); + return false; + } + err = snd_pcm_hw_params_set_access(pcm_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); + if (err < 0) { + fprintf(stderr, "[%s] snd_pcm_hw_params_set_access(): %s\n", device_name, snd_strerror(err)); + return false; + } + snd_pcm_format_mask_t *format_mask; + snd_pcm_format_mask_alloca(&format_mask); + snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S16_LE); + snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S24_LE); + snd_pcm_format_mask_set(format_mask, SND_PCM_FORMAT_S32_LE); + err = snd_pcm_hw_params_set_format_mask(pcm_handle, hw_params, format_mask); + if (err < 0) { + fprintf(stderr, "[%s] snd_pcm_hw_params_set_format_mask(): %s\n", device_name, snd_strerror(err)); + return false; + } + err = snd_pcm_hw_params_set_rate_near(pcm_handle, hw_params, sample_rate, 0); + if (err < 0) { + fprintf(stderr, "[%s] snd_pcm_hw_params_set_rate_near(): %s\n", device_name, snd_strerror(err)); + return false; + } + return true; } ALSAInput::~ALSAInput() { - die_on_error("snd_pcm_close()", snd_pcm_close(pcm_handle)); + if (pcm_handle) { + WARN_ON_ERROR("snd_pcm_close()", snd_pcm_close(pcm_handle)); + } } void ALSAInput::start_capture_thread() { - should_quit = false; + assert(!device.empty()); + should_quit.unquit(); capture_thread = thread(&ALSAInput::capture_thread_func, this); } void ALSAInput::stop_capture_thread() { - should_quit = true; + should_quit.quit(); capture_thread.join(); } void ALSAInput::capture_thread_func() { - die_on_error("snd_pcm_start()", snd_pcm_start(pcm_handle)); + parent_pool->set_card_state(internal_dev_index, ALSAPool::Device::State::STARTING); + + // If the device hasn't been opened already, we need to do so + // before we can capture. + while (!should_quit.should_quit() && pcm_handle == nullptr) { + if (!open_device()) { + fprintf(stderr, "[%s] Waiting one second and trying again...\n", + device.c_str()); + should_quit.sleep_for(seconds(1)); + } + } + + if (should_quit.should_quit()) { + // Don't call free_card(); that would be a deadlock. + if (pcm_handle) { + WARN_ON_ERROR("snd_pcm_close()", snd_pcm_close(pcm_handle)); + } + pcm_handle = nullptr; + return; + } + + // Do the actual capture. (Termination condition within loop.) + for ( ;; ) { + switch (do_capture()) { + case CaptureEndReason::REQUESTED_QUIT: + // Don't call free_card(); that would be a deadlock. + WARN_ON_ERROR("snd_pcm_close()", snd_pcm_close(pcm_handle)); + pcm_handle = nullptr; + return; + case CaptureEndReason::DEVICE_GONE: + parent_pool->free_card(internal_dev_index); + WARN_ON_ERROR("snd_pcm_close()", snd_pcm_close(pcm_handle)); + pcm_handle = nullptr; + return; + case CaptureEndReason::OTHER_ERROR: + parent_pool->set_card_state(internal_dev_index, ALSAPool::Device::State::STARTING); + fprintf(stderr, "[%s] Sleeping one second and restarting capture...\n", + device.c_str()); + should_quit.sleep_for(seconds(1)); + break; + } + } +} + +ALSAInput::CaptureEndReason ALSAInput::do_capture() +{ + parent_pool->set_card_state(internal_dev_index, ALSAPool::Device::State::STARTING); + RETURN_ON_ERROR("snd_pcm_start()", snd_pcm_start(pcm_handle)); + parent_pool->set_card_state(internal_dev_index, ALSAPool::Device::State::RUNNING); + uint64_t num_frames_output = 0; - while (!should_quit) { + while (!should_quit.should_quit()) { int ret = snd_pcm_wait(pcm_handle, /*timeout=*/100); if (ret == 0) continue; // Timeout. if (ret == -EPIPE) { @@ -108,7 +231,7 @@ void ALSAInput::capture_thread_func() snd_pcm_start(pcm_handle); continue; } - die_on_error("snd_pcm_wait()", ret); + RETURN_ON_ERROR("snd_pcm_wait()", ret); snd_pcm_sframes_t frames = snd_pcm_readi(pcm_handle, buffer.get(), buffer_frames); if (frames == -EPIPE) { @@ -121,13 +244,19 @@ void ALSAInput::capture_thread_func() fprintf(stderr, "snd_pcm_readi() returned 0\n"); break; } - die_on_error("snd_pcm_readi()", frames); + RETURN_ON_ERROR("snd_pcm_readi()", frames); const int64_t prev_pts = frames_to_pts(num_frames_output); const int64_t pts = frames_to_pts(num_frames_output + frames); - audio_callback(buffer.get(), frames, audio_format, pts - prev_pts); + const steady_clock::time_point now = steady_clock::now(); + bool success; + do { + if (should_quit.should_quit()) return CaptureEndReason::REQUESTED_QUIT; + success = audio_callback(buffer.get(), frames, audio_format, pts - prev_pts, now); + } while (!success); num_frames_output += frames; } + return CaptureEndReason::REQUESTED_QUIT; } int64_t ALSAInput::frames_to_pts(uint64_t n) const @@ -135,74 +264,3 @@ int64_t ALSAInput::frames_to_pts(uint64_t n) const return (n * TIMEBASE) / sample_rate; } -void ALSAInput::die_on_error(const char *func_name, int err) -{ - if (err < 0) { - fprintf(stderr, "[%s] %s: %s\n", device.c_str(), func_name, snd_strerror(err)); - exit(1); - } -} - -vector ALSAInput::enumerate_devices() -{ - vector ret; - - // Enumerate all cards. - for (int card_index = -1; snd_card_next(&card_index) == 0 && card_index >= 0; ) { - char address[256]; - snprintf(address, sizeof(address), "hw:%d", card_index); - - snd_ctl_t *ctl; - int err = snd_ctl_open(&ctl, address, 0); - if (err < 0) { - printf("%s: %s\n", address, snd_strerror(err)); - continue; - } - snd_ctl_card_info_t *card_info; - snd_ctl_card_info_alloca(&card_info); - snd_ctl_card_info(ctl, card_info); - - string card_name = snd_ctl_card_info_get_name(card_info); - - // Enumerate all devices on this card. - for (int dev_index = -1; snd_ctl_pcm_next_device(ctl, &dev_index) == 0 && dev_index >= 0; ) { - snd_pcm_info_t *pcm_info; - snd_pcm_info_alloca(&pcm_info); - snd_pcm_info_set_device(pcm_info, dev_index); - snd_pcm_info_set_subdevice(pcm_info, 0); - snd_pcm_info_set_stream(pcm_info, SND_PCM_STREAM_CAPTURE); - if (snd_ctl_pcm_info(ctl, pcm_info) < 0) { - // Not available for capture. - continue; - } - - snprintf(address, sizeof(address), "hw:%d,%d", card_index, dev_index); - - // Find all channel maps for this device, and pick out the one - // with the most channels. - snd_pcm_chmap_query_t **cmaps = snd_pcm_query_chmaps_from_hw(card_index, dev_index, 0, SND_PCM_STREAM_CAPTURE); - unsigned num_channels = 0; - for (snd_pcm_chmap_query_t **ptr = cmaps; *ptr; ++ptr) { - num_channels = max(num_channels, (*ptr)->map.channels); - } - - snd_pcm_free_chmaps(cmaps); - - if (num_channels == 0) { - printf("%s: No channel maps with channels\n", address); - continue; - } - - Device dev; - dev.address = address; - dev.name = card_name; - dev.info = snd_pcm_info_get_name(pcm_info); - dev.num_channels = num_channels; - - ret.push_back(dev); - } - snd_ctl_close(ctl); - } - - return ret; -}