X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=alsa_input.h;h=84e46b0887707dd6b273419d29cf2fada00c43d7;hb=1fc8b5d92fce7ac0b7e87ed3087e393774fd4b3c;hp=724b64011749f01bc554cb720e3c095473113c3c;hpb=7460e2f2d678c9255afe914c1988f14c87798727;p=nageru

diff --git a/alsa_input.h b/alsa_input.h
index 724b640..84e46b0 100644
--- a/alsa_input.h
+++ b/alsa_input.h
@@ -22,7 +22,7 @@
 
 class ALSAInput {
 public:
-	typedef std::function<void(const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length)> audio_callback_t;
+	typedef std::function<bool(const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length)> audio_callback_t;
 
 	ALSAInput(const char *device, unsigned sample_rate, unsigned num_channels, audio_callback_t audio_callback);
 	~ALSAInput();
@@ -34,10 +34,19 @@ public:
 	void start_capture_thread();
 	void stop_capture_thread();
 
+	// TODO: Worry about hotplug.
+	struct Device {
+		std::string address;  // E.g. “hw:0,0”.
+		std::string name, info;
+		unsigned num_channels;
+	};
+	static std::vector<Device> enumerate_devices();
+
 private:
 	void capture_thread_func();
 	int64_t frames_to_pts(uint64_t n) const;
 	void die_on_error(const char *func_name, int err);
+	static bool set_base_params(const char *device, snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hw_params, unsigned *sample_rate);
 
 	std::string device;
 	unsigned sample_rate, num_channels, num_periods;