diff options
Diffstat (limited to 'audio/jack-audio-connection-kit/ffado_setbuffsize-jack1.patch')
| -rw-r--r-- | audio/jack-audio-connection-kit/ffado_setbuffsize-jack1.patch | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/audio/jack-audio-connection-kit/ffado_setbuffsize-jack1.patch b/audio/jack-audio-connection-kit/ffado_setbuffsize-jack1.patch new file mode 100644 index 0000000000..7e43962eec --- /dev/null +++ b/audio/jack-audio-connection-kit/ffado_setbuffsize-jack1.patch @@ -0,0 +1,124 @@ +From 025d3ad4d5adeff00e97b6fafdf32d6d199d0baa Mon Sep 17 00:00:00 2001 +From: Jonathan Woithe <jwoithe@just42.net> +Date: Tue, 13 Mar 2012 15:43:03 +1030 +Subject: [PATCH] Support setbufsize in firewire driver + +--- + drivers/firewire/ffado_driver.c | 69 ++++++++++++++++++++++++++++++++++----- + 1 file changed, 60 insertions(+), 9 deletions(-) + +diff --git a/drivers/firewire/ffado_driver.c b/drivers/firewire/ffado_driver.c +index a8ad1ea..6035af3 100644 +--- a/drivers/firewire/ffado_driver.c ++++ b/drivers/firewire/ffado_driver.c +@@ -7,6 +7,7 @@ + * http://www.jackaudio.org + * + * Copyright (C) 2005-2007 Pieter Palmers ++ * Copyright (C) 2012 Jonathan Woithe + * + * 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 +@@ -50,7 +51,10 @@ + + static int ffado_driver_stop (ffado_driver_t *driver); + ++// 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 + + // enable verbose messages + static int g_verbose=0; +@@ -675,24 +679,71 @@ + static int + ffado_driver_bufsize (ffado_driver_t* driver, jack_nframes_t nframes) + { +- printError("Buffer size change requested but not supported!!!"); ++ 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_size = nframes; + driver->period_usecs = + (jack_time_t) floor ((((float) nframes) / driver->sample_rate) + * 1000000.0f); +- */ +- ++ ++ // Reallocate the null and scratch buffers. ++ driver->nullbuffer = calloc(driver->period_size, sizeof(ffado_sample_t)); ++ if(driver->nullbuffer == NULL) { ++ printError("could not allocate memory for null buffer"); ++ return -1; ++ } ++ driver->scratchbuffer = 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 = 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 = 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 */ +-#if 0 + if (driver->engine->set_buffer_size (driver->engine, nframes)) { + jack_error ("FFADO: cannot set engine buffer size to %d (check MIDI)", nframes); + return -1; + } +-#endif + +- return -1; // unsupported ++ // Other drivers (eg: ALSA) don't seem to adjust latencies via ++ // jack_port_set_latency_range() from the bufsize() callback, so we ++ // won't either. Is this right? ++ ++ return 0; + } + + typedef void (*JackDriverFinishFunction) (jack_driver_t *); +@@ -704,7 +755,7 @@ + { + ffado_driver_t *driver; + +- 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; + } +-- +1.7.10 + |