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OpenCloudOS-Kernel/include/sound/pcm-indirect.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 Based on 1 normalized pattern(s): 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 either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-20 15:19:02 +08:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Helper functions for indirect PCM data transfer
*
* Copyright (c) by Takashi Iwai <tiwai@suse.de>
[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2007-10-15 15:50:19 +08:00
* Jaroslav Kysela <perex@perex.cz>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
#ifndef __SOUND_PCM_INDIRECT_H
#define __SOUND_PCM_INDIRECT_H
#include <sound/pcm.h>
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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struct snd_pcm_indirect {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int hw_buffer_size; /* Byte size of hardware buffer */
unsigned int hw_queue_size; /* Max queue size of hw buffer (0 = buffer size) */
unsigned int hw_data; /* Offset to next dst (or src) in hw ring buffer */
unsigned int hw_io; /* Ring buffer hw pointer */
int hw_ready; /* Bytes ready for play (or captured) in hw ring buffer */
unsigned int sw_buffer_size; /* Byte size of software buffer */
unsigned int sw_data; /* Offset to next dst (or src) in sw ring buffer */
unsigned int sw_io; /* Current software pointer in bytes */
int sw_ready; /* Bytes ready to be transferred to/from hw */
snd_pcm_uframes_t appl_ptr; /* Last seen appl_ptr */
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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};
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
typedef void (*snd_pcm_indirect_copy_t)(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, size_t bytes);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* helper function for playback ack callback
*/
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
static inline int
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
snd_pcm_indirect_playback_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_indirect_copy_t copy)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
int qsize;
if (diff) {
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
if (diff < 0)
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
rec->sw_ready += (int)frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
qsize = rec->hw_queue_size ? rec->hw_queue_size : rec->hw_buffer_size;
while (rec->hw_ready < qsize && rec->sw_ready > 0) {
unsigned int hw_to_end = rec->hw_buffer_size - rec->hw_data;
unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
unsigned int bytes = qsize - rec->hw_ready;
if (rec->sw_ready < (int)bytes)
bytes = rec->sw_ready;
if (hw_to_end < bytes)
bytes = hw_to_end;
if (sw_to_end < bytes)
bytes = sw_to_end;
if (! bytes)
break;
copy(substream, rec, bytes);
rec->hw_data += bytes;
if (rec->hw_data == rec->hw_buffer_size)
rec->hw_data = 0;
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
rec->hw_ready += bytes;
rec->sw_ready -= bytes;
}
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*
* helper function for playback pointer callback
* ptr = current byte pointer
*/
static inline snd_pcm_uframes_t
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
snd_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, unsigned int ptr)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int bytes = ptr - rec->hw_io;
if (bytes < 0)
bytes += rec->hw_buffer_size;
rec->hw_io = ptr;
rec->hw_ready -= bytes;
rec->sw_io += bytes;
if (rec->sw_io >= rec->sw_buffer_size)
rec->sw_io -= rec->sw_buffer_size;
if (substream->ops->ack)
substream->ops->ack(substream);
return bytes_to_frames(substream->runtime, rec->sw_io);
}
/*
* helper function for capture ack callback
*/
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
static inline int
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
snd_pcm_indirect_capture_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_indirect_copy_t copy)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
if (diff) {
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
if (diff < 0)
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
rec->sw_ready -= frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
while (rec->hw_ready > 0 &&
rec->sw_ready < (int)rec->sw_buffer_size) {
size_t hw_to_end = rec->hw_buffer_size - rec->hw_data;
size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
size_t bytes = rec->sw_buffer_size - rec->sw_ready;
if (rec->hw_ready < (int)bytes)
bytes = rec->hw_ready;
if (hw_to_end < bytes)
bytes = hw_to_end;
if (sw_to_end < bytes)
bytes = sw_to_end;
if (! bytes)
break;
copy(substream, rec, bytes);
rec->hw_data += bytes;
if ((int)rec->hw_data == rec->hw_buffer_size)
rec->hw_data = 0;
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
rec->hw_ready -= bytes;
rec->sw_ready += bytes;
}
ALSA: pcm: Fix negative appl_ptr handling in pcm-indirect helpers The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-20 00:31:03 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*
* helper function for capture pointer callback,
* ptr = current byte pointer
*/
static inline snd_pcm_uframes_t
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
snd_pcm_indirect_capture_pointer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, unsigned int ptr)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int qsize;
int bytes = ptr - rec->hw_io;
if (bytes < 0)
bytes += rec->hw_buffer_size;
rec->hw_io = ptr;
rec->hw_ready += bytes;
qsize = rec->hw_queue_size ? rec->hw_queue_size : rec->hw_buffer_size;
if (rec->hw_ready > qsize)
return SNDRV_PCM_POS_XRUN;
rec->sw_io += bytes;
if (rec->sw_io >= rec->sw_buffer_size)
rec->sw_io -= rec->sw_buffer_size;
if (substream->ops->ack)
substream->ops->ack(substream);
return bytes_to_frames(substream->runtime, rec->sw_io);
}
#endif /* __SOUND_PCM_INDIRECT_H */