diff options
Diffstat (limited to 'community-testing/jack2/ffado_setbuffsize-jack2.patch')
| -rw-r--r-- | community-testing/jack2/ffado_setbuffsize-jack2.patch | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/community-testing/jack2/ffado_setbuffsize-jack2.patch b/community-testing/jack2/ffado_setbuffsize-jack2.patch deleted file mode 100644 index 0c74aad24..000000000 --- a/community-testing/jack2/ffado_setbuffsize-jack2.patch +++ /dev/null @@ -1,139 +0,0 @@ -From 96e0251234a29a1360c05d5d7dc98b83436b8183 Mon Sep 17 00:00:00 2001 -From: Adrian Knoth <adi@drcomp.erfurt.thur.de> -Date: Sat, 17 Mar 2012 22:36:30 +0100 -Subject: [PATCH] [firewire] Allow FFADO backend to change the buffer size - -This is a port of Jonathan Woithe's patch from jackd1. -With sufficiently recent versions of FFADO, it allows to change -the buffersize at runtime. ---- - linux/firewire/JackFFADODriver.cpp | 65 ++++++++++++++++++++++++++++++++---- - linux/firewire/JackFFADODriver.h | 6 ++++ - 2 files changed, 65 insertions(+), 6 deletions(-) - -diff --git a/linux/firewire/JackFFADODriver.cpp b/linux/firewire/JackFFADODriver.cpp -index b33e1cd..085b78a 100644 ---- a/linux/firewire/JackFFADODriver.cpp -+++ b/linux/firewire/JackFFADODriver.cpp -@@ -3,6 +3,7 @@ - Copyright (C) 2004 Grame - Copyright (C) 2007 Pieter Palmers - Copyright (C) 2009 Devin Anderson -+Copyright (C) 2012 Jonathan Woithe, Adrian Knoth - - 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 -@@ -48,7 +49,10 @@ - namespace Jack - { - -+// Basic functionality requires API version 8. If version 9 or later -+// is present the buffers can be resized at runtime. - #define FIREWIRE_REQUIRED_FFADO_API_VERSION 8 -+#define FIREWIRE_REQUIRED_FFADO_API_VERSION_FOR_SETBUFSIZE 9 - - #define jack_get_microseconds GetMicroSeconds - -@@ -281,19 +285,68 @@ - int - JackFFADODriver::SetBufferSize (jack_nframes_t nframes) - { -- printError("Buffer size change requested but not supported!!!"); -+ ffado_driver_t* driver = (ffado_driver_t*)fDriver; -+ signed int chn; -+ -+ // The speed of this function isn't critical; we can afford the -+ // time to check the FFADO API version. -+ if (ffado_get_api_version() < FIREWIRE_REQUIRED_FFADO_API_VERSION_FOR_SETBUFSIZE || -+ ffado_streaming_set_period_size == NULL) { -+ printError("unsupported on current version of FFADO; please upgrade FFADO"); -+ return -1; -+ } - -- /* - driver->period_size = nframes; - driver->period_usecs = - (jack_time_t) floor ((((float) nframes) / driver->sample_rate) - * 1000000.0f); -- */ -+ -+ -+ // Reallocate the null and scratch buffers. -+ driver->nullbuffer = (ffado_sample_t*) calloc(driver->period_size, sizeof(ffado_sample_t)); -+ if(driver->nullbuffer == NULL) { -+ printError("could not allocate memory for null buffer"); -+ return -1; -+ } -+ driver->scratchbuffer = (ffado_sample_t*) calloc(driver->period_size, sizeof(ffado_sample_t)); -+ if(driver->scratchbuffer == NULL) { -+ printError("could not allocate memory for scratch buffer"); -+ return -1; -+ } -+ -+ // MIDI buffers need reallocating -+ for (chn = 0; chn < driver->capture_nchannels; chn++) { -+ if(driver->capture_channels[chn].stream_type == ffado_stream_type_midi) { -+ // setup the midi buffer -+ if (driver->capture_channels[chn].midi_buffer != NULL) -+ free(driver->capture_channels[chn].midi_buffer); -+ driver->capture_channels[chn].midi_buffer = (ffado_sample_t*) calloc(driver->period_size, sizeof(uint32_t)); -+ } -+ } -+ for (chn = 0; chn < driver->playback_nchannels; chn++) { -+ if(driver->playback_channels[chn].stream_type == ffado_stream_type_midi) { -+ if (driver->playback_channels[chn].midi_buffer != NULL) -+ free(driver->playback_channels[chn].midi_buffer); -+ driver->playback_channels[chn].midi_buffer = (ffado_sample_t*) calloc(driver->period_size, sizeof(uint32_t)); -+ } -+ } -+ -+ // Notify FFADO of the period size change -+ if (ffado_streaming_set_period_size(driver->dev, nframes) != 0) { -+ printError("could not alter FFADO device period size"); -+ return -1; -+ } -+ -+ // This is needed to give the shadow variables a chance to -+ // properly update to the changes. -+ sleep(1); - - /* tell the engine to change its buffer size */ -- //driver->engine->set_buffer_size (driver->engine, nframes); -+ JackAudioDriver::SetBufferSize(nframes); // Generic change, never fails - -- return -1; // unsupported -+ UpdateLatencies(); -+ -+ return 0; - } - - typedef void (*JackDriverFinishFunction) (jack_driver_t *); -@@ -306,7 +359,7 @@ - - assert(params); - -- if (ffado_get_api_version() != FIREWIRE_REQUIRED_FFADO_API_VERSION) { -+ if (ffado_get_api_version() < FIREWIRE_REQUIRED_FFADO_API_VERSION) { - printError("Incompatible libffado version! (%s)", ffado_get_version()); - return NULL; - } -diff --git a/linux/firewire/JackFFADODriver.h b/linux/firewire/JackFFADODriver.h -index cb2a45d..790f4dd 100644 ---- a/linux/firewire/JackFFADODriver.h -+++ b/linux/firewire/JackFFADODriver.h -@@ -82,6 +82,12 @@ class JackFFADODriver : public JackAudioDriver - int Read(); - int Write(); - -+ // BufferSize can be changed -+ bool IsFixedBufferSize() -+ { -+ return false; -+ } -+ - int SetBufferSize(jack_nframes_t nframes); - }; - --- -1.7.10 - |