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Diffstat (limited to 'drivers/staging/line6/pcm.h')
| -rw-r--r-- | drivers/staging/line6/pcm.h | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/drivers/staging/line6/pcm.h b/drivers/staging/line6/pcm.h deleted file mode 100644 index 6aa0d46a2890..000000000000 --- a/drivers/staging/line6/pcm.h +++ /dev/null @@ -1,382 +0,0 @@ -/* - * Line6 Linux USB driver - 0.9.1beta - * - * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation, version 2. - * - */ - -/* - PCM interface to POD series devices. -*/ - -#ifndef PCM_H -#define PCM_H - -#include <sound/pcm.h> - -#include "driver.h" -#include "usbdefs.h" - -/* number of URBs */ -#define LINE6_ISO_BUFFERS 2 - -/* - number of USB frames per URB - The Line6 Windows driver always transmits two frames per packet, but - the Linux driver performs significantly better (i.e., lower latency) - with only one frame per packet. -*/ -#define LINE6_ISO_PACKETS 1 - -/* in a "full speed" device (such as the PODxt Pro) this means 1ms */ -#define LINE6_ISO_INTERVAL 1 - -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE -#define LINE6_IMPULSE_DEFAULT_PERIOD 100 -#endif - -/* - Get substream from Line6 PCM data structure -*/ -#define get_substream(line6pcm, stream) \ - (line6pcm->pcm->streams[stream].substream) - -/* - PCM mode bits. - - There are several features of the Line6 USB driver which require PCM - data to be exchanged with the device: - *) PCM playback and capture via ALSA - *) software monitoring (for devices without hardware monitoring) - *) optional impulse response measurement - However, from the device's point of view, there is just a single - capture and playback stream, which must be shared between these - subsystems. It is therefore necessary to maintain the state of the - subsystems with respect to PCM usage. We define several constants of - the form LINE6_BIT_PCM_<subsystem>_<direction>_<resource> with the - following meanings: - *) <subsystem> is one of - -) ALSA: PCM playback and capture via ALSA - -) MONITOR: software monitoring - -) IMPULSE: optional impulse response measurement - *) <direction> is one of - -) PLAYBACK: audio output (from host to device) - -) CAPTURE: audio input (from device to host) - *) <resource> is one of - -) BUFFER: buffer required by PCM data stream - -) STREAM: actual PCM data stream - - The subsystems call line6_pcm_acquire() to acquire the (shared) - resources needed for a particular operation (e.g., allocate the buffer - for ALSA playback or start the capture stream for software monitoring). - When a resource is no longer needed, it is released by calling - line6_pcm_release(). Buffer allocation and stream startup are handled - separately to allow the ALSA kernel driver to perform them at - appropriate places (since the callback which starts a PCM stream is not - allowed to sleep). -*/ -enum { - /* individual bit indices: */ - LINE6_INDEX_PCM_ALSA_PLAYBACK_BUFFER, - LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, - LINE6_INDEX_PCM_ALSA_CAPTURE_BUFFER, - LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM, - LINE6_INDEX_PCM_MONITOR_PLAYBACK_BUFFER, - LINE6_INDEX_PCM_MONITOR_PLAYBACK_STREAM, - LINE6_INDEX_PCM_MONITOR_CAPTURE_BUFFER, - LINE6_INDEX_PCM_MONITOR_CAPTURE_STREAM, -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_INDEX_PCM_IMPULSE_PLAYBACK_BUFFER, - LINE6_INDEX_PCM_IMPULSE_PLAYBACK_STREAM, - LINE6_INDEX_PCM_IMPULSE_CAPTURE_BUFFER, - LINE6_INDEX_PCM_IMPULSE_CAPTURE_STREAM, -#endif - LINE6_INDEX_PAUSE_PLAYBACK, - LINE6_INDEX_PREPARED, - - /* individual bit masks: */ - LINE6_BIT(PCM_ALSA_PLAYBACK_BUFFER), - LINE6_BIT(PCM_ALSA_PLAYBACK_STREAM), - LINE6_BIT(PCM_ALSA_CAPTURE_BUFFER), - LINE6_BIT(PCM_ALSA_CAPTURE_STREAM), - LINE6_BIT(PCM_MONITOR_PLAYBACK_BUFFER), - LINE6_BIT(PCM_MONITOR_PLAYBACK_STREAM), - LINE6_BIT(PCM_MONITOR_CAPTURE_BUFFER), - LINE6_BIT(PCM_MONITOR_CAPTURE_STREAM), -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BIT(PCM_IMPULSE_PLAYBACK_BUFFER), - LINE6_BIT(PCM_IMPULSE_PLAYBACK_STREAM), - LINE6_BIT(PCM_IMPULSE_CAPTURE_BUFFER), - LINE6_BIT(PCM_IMPULSE_CAPTURE_STREAM), -#endif - LINE6_BIT(PAUSE_PLAYBACK), - LINE6_BIT(PREPARED), - - /* combined bit masks (by operation): */ - LINE6_BITS_PCM_ALSA_BUFFER = - LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER | - LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER, - - LINE6_BITS_PCM_ALSA_STREAM = - LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM | - LINE6_BIT_PCM_ALSA_CAPTURE_STREAM, - - LINE6_BITS_PCM_MONITOR = - LINE6_BIT_PCM_MONITOR_PLAYBACK_BUFFER | - LINE6_BIT_PCM_MONITOR_PLAYBACK_STREAM | - LINE6_BIT_PCM_MONITOR_CAPTURE_BUFFER | - LINE6_BIT_PCM_MONITOR_CAPTURE_STREAM, - -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BITS_PCM_IMPULSE = - LINE6_BIT_PCM_IMPULSE_PLAYBACK_BUFFER | - LINE6_BIT_PCM_IMPULSE_PLAYBACK_STREAM | - LINE6_BIT_PCM_IMPULSE_CAPTURE_BUFFER | - LINE6_BIT_PCM_IMPULSE_CAPTURE_STREAM, -#endif - - /* combined bit masks (by direction): */ - LINE6_BITS_PLAYBACK_BUFFER = -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BIT_PCM_IMPULSE_PLAYBACK_BUFFER | -#endif - LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER | - LINE6_BIT_PCM_MONITOR_PLAYBACK_BUFFER , - - LINE6_BITS_PLAYBACK_STREAM = -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BIT_PCM_IMPULSE_PLAYBACK_STREAM | -#endif - LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM | - LINE6_BIT_PCM_MONITOR_PLAYBACK_STREAM , - - LINE6_BITS_CAPTURE_BUFFER = -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BIT_PCM_IMPULSE_CAPTURE_BUFFER | -#endif - LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER | - LINE6_BIT_PCM_MONITOR_CAPTURE_BUFFER , - - LINE6_BITS_CAPTURE_STREAM = -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - LINE6_BIT_PCM_IMPULSE_CAPTURE_STREAM | -#endif - LINE6_BIT_PCM_ALSA_CAPTURE_STREAM | - LINE6_BIT_PCM_MONITOR_CAPTURE_STREAM, - - LINE6_BITS_STREAM = - LINE6_BITS_PLAYBACK_STREAM | - LINE6_BITS_CAPTURE_STREAM -}; - -struct line6_pcm_properties { - struct snd_pcm_hardware snd_line6_playback_hw, snd_line6_capture_hw; - struct snd_pcm_hw_constraint_ratdens snd_line6_rates; - int bytes_per_frame; -}; - -struct snd_line6_pcm { - /** - Pointer back to the Line6 driver data structure. - */ - struct usb_line6 *line6; - - /** - Properties. - */ - struct line6_pcm_properties *properties; - - /** - ALSA pcm stream - */ - struct snd_pcm *pcm; - - /** - URBs for audio playback. - */ - struct urb *urb_audio_out[LINE6_ISO_BUFFERS]; - - /** - URBs for audio capture. - */ - struct urb *urb_audio_in[LINE6_ISO_BUFFERS]; - - /** - Temporary buffer for playback. - Since the packet size is not known in advance, this buffer is - large enough to store maximum size packets. - */ - unsigned char *buffer_out; - - /** - Temporary buffer for capture. - Since the packet size is not known in advance, this buffer is - large enough to store maximum size packets. - */ - unsigned char *buffer_in; - - /** - Previously captured frame (for software monitoring). - */ - unsigned char *prev_fbuf; - - /** - Size of previously captured frame (for software monitoring). - */ - int prev_fsize; - - /** - Free frame position in the playback buffer. - */ - snd_pcm_uframes_t pos_out; - - /** - Count processed bytes for playback. - This is modulo period size (to determine when a period is - finished). - */ - unsigned bytes_out; - - /** - Counter to create desired playback sample rate. - */ - unsigned count_out; - - /** - Playback period size in bytes - */ - unsigned period_out; - - /** - Processed frame position in the playback buffer. - The contents of the output ring buffer have been consumed by - the USB subsystem (i.e., sent to the USB device) up to this - position. - */ - snd_pcm_uframes_t pos_out_done; - - /** - Count processed bytes for capture. - This is modulo period size (to determine when a period is - finished). - */ - unsigned bytes_in; - - /** - Counter to create desired capture sample rate. - */ - unsigned count_in; - - /** - Capture period size in bytes - */ - unsigned period_in; - - /** - Processed frame position in the capture buffer. - The contents of the output ring buffer have been consumed by - the USB subsystem (i.e., sent to the USB device) up to this - position. - */ - snd_pcm_uframes_t pos_in_done; - - /** - Bit mask of active playback URBs. - */ - unsigned long active_urb_out; - - /** - Maximum size of USB packet. - */ - int max_packet_size; - - /** - USB endpoint for listening to audio data. - */ - int ep_audio_read; - - /** - USB endpoint for writing audio data. - */ - int ep_audio_write; - - /** - Bit mask of active capture URBs. - */ - unsigned long active_urb_in; - - /** - Bit mask of playback URBs currently being unlinked. - */ - unsigned long unlink_urb_out; - - /** - Bit mask of capture URBs currently being unlinked. - */ - unsigned long unlink_urb_in; - - /** - Spin lock to protect updates of the playback buffer positions (not - contents!) - */ - spinlock_t lock_audio_out; - - /** - Spin lock to protect updates of the capture buffer positions (not - contents!) - */ - spinlock_t lock_audio_in; - - /** - Spin lock to protect trigger. - */ - spinlock_t lock_trigger; - - /** - PCM playback volume (left and right). - */ - int volume_playback[2]; - - /** - PCM monitor volume. - */ - int volume_monitor; - -#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE - /** - Volume of impulse response test signal (if zero, test is disabled). - */ - int impulse_volume; - - /** - Period of impulse response test signal. - */ - int impulse_period; - - /** - Counter for impulse response test signal. - */ - int impulse_count; -#endif - - /** - Several status bits (see LINE6_BIT_*). - */ - unsigned long flags; - - int last_frame_in, last_frame_out; -}; - -extern int line6_init_pcm(struct usb_line6 *line6, - struct line6_pcm_properties *properties); -extern int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd); -extern int snd_line6_prepare(struct snd_pcm_substream *substream); -extern void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm); -extern int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels); -extern int line6_pcm_release(struct snd_line6_pcm *line6pcm, int channels); - -#endif |