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Diffstat (limited to 'firmware/target/hosted/android/dx50/pcm-dx50.c')
| -rw-r--r-- | firmware/target/hosted/android/dx50/pcm-dx50.c | 364 |
1 files changed, 0 insertions, 364 deletions
diff --git a/firmware/target/hosted/android/dx50/pcm-dx50.c b/firmware/target/hosted/android/dx50/pcm-dx50.c deleted file mode 100644 index e7695873a0..0000000000 --- a/firmware/target/hosted/android/dx50/pcm-dx50.c +++ /dev/null @@ -1,364 +0,0 @@ -/*************************************************************************** - * __________ __ ___. - * Open \______ \ ____ ____ | | _\_ |__ _______ ___ - * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / - * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < - * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ - * \/ \/ \/ \/ \/ - * $Id$ - * - * Copyright (C) 2010 Thomas Martitz - * - * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ****************************************************************************/ - - -/* - * Based, but heavily modified, on the example given at - * http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html - * - * This driver uses the so-called unsafe async callback method and hardcoded device - * names. It fails when the audio device is busy by other apps. - * - * To make the async callback safer, an alternative stack is installed, since - * it's run from a signal hanlder (which otherwise uses the user stack). If - * tick tasks are run from a signal handler too, please install - * an alternative stack for it too. - * - * TODO: Rewrite this to do it properly with multithreading - * - * Alternatively, a version using polling in a tick task is provided. While - * supposedly safer, it appears to use more CPU (however I didn't measure it - * accurately, only looked at htop). At least, in this mode the "default" - * device works which doesnt break with other apps running. - */ - - -#include "autoconf.h" - -#include <stdlib.h> -#include <stdbool.h> -#include <stdio.h> -#include <errno.h> -#include "tinyalsa/asoundlib.h" -#include "tinyalsa/asound.h" -#include "system.h" -#include "debug.h" -#include "kernel.h" - -#include "pcm.h" -#include "pcm-internal.h" -#include "pcm_mixer.h" -#include "pcm_sampr.h" -#include "audiohw.h" - -#include <pthread.h> -#include <signal.h> - -static const snd_pcm_format_t format = PCM_FORMAT_S16_LE; /* sample format */ -static const int channels = 2; /* count of channels */ -static unsigned int rate = 44100; /* stream rate */ - -typedef struct pcm snd_pcm_t; -static snd_pcm_t *handle; -struct pcm_config config; - -static snd_pcm_sframes_t period_size = 512; /* if set to >= 1024, all timers become even slower */ -static char *frames; - -static const void *pcm_data = 0; -static size_t pcm_size = 0; - -static int recursion; - -static int set_hwparams(snd_pcm_t *handle) -{ - int err; - if (!frames) - frames = malloc(pcm_frames_to_bytes(handle, pcm_get_buffer_size(handle))); - err = 0; /* success */ - return err; -} - - -/* copy pcm samples to a spare buffer, suitable for snd_pcm_writei() */ -static bool fill_frames(void) -{ - size_t copy_n, frames_left = period_size; - bool new_buffer = false; - - while (frames_left > 0) - { - if (!pcm_size) - { - new_buffer = true; - if (!pcm_play_dma_complete_callback(PCM_DMAST_OK, &pcm_data, - &pcm_size)) - { - return false; - } - } - copy_n = MIN((size_t)pcm_size, pcm_frames_to_bytes(handle, frames_left)); - memcpy(&frames[pcm_frames_to_bytes(handle, period_size-frames_left)], pcm_data, copy_n); - - pcm_data += copy_n; - pcm_size -= copy_n; - frames_left -= pcm_bytes_to_frames(handle, copy_n); - - if (new_buffer) - { - new_buffer = false; - pcm_play_dma_status_callback(PCM_DMAST_STARTED); - } - } - return true; -} - - -static void pcm_tick(void) -{ - if (fill_frames()) - { - if (pcm_write(handle, frames, pcm_frames_to_bytes(handle, period_size))) { - printf("Error playing sample\n"); - return;//break; - } - - } - else - { - DEBUGF("%s: No Data.\n", __func__); - return;//break; - } -} - -static int async_rw(snd_pcm_t *handle) -{ - int err; - snd_pcm_sframes_t sample_size; - char *samples; - - /* fill buffer with silence to initiate playback without noisy click */ - sample_size = pcm_frames_to_bytes(handle, pcm_get_buffer_size(handle)); - samples = malloc(sample_size); - - memset(samples, 0, sample_size); - - err = pcm_write(handle, samples, sample_size); - free(samples); - - if (err != 0) - { - DEBUGF("Initial write error: %d\n", err); - return err; - } - if (pcm_state(handle) == PCM_STATE_PREPARED) - { - err = pcm_start(handle); - if (err < 0) - { - DEBUGF("Start error: %d\n", err); - return err; - } - } - return 0; -} - -void cleanup(void) -{ - free(frames); - frames = NULL; - pcm_close(handle); -} - -void pcm_play_dma_init(void) -{ - config.channels = channels; - config.rate = rate; - config.period_size = period_size; - config.period_count = 4; - config.format = format; - config.start_threshold = 0; - config.stop_threshold = 0; - config.silence_threshold = 0; - - - handle = pcm_open(0, 0, PCM_OUT, &config); - if (!handle || !pcm_is_ready(handle)) { - printf("Unable to open PCM device: %s\n", pcm_get_error(handle)); - return; - } - - pcm_dma_apply_settings(); - - tick_add_task(pcm_tick); - - atexit(cleanup); - return; -} - - -void pcm_play_lock(void) -{ - if (recursion++ == 0) - tick_remove_task(pcm_tick); -} - -void pcm_play_unlock(void) -{ - if (--recursion == 0) - tick_add_task(pcm_tick); -} - -static void pcm_dma_apply_settings_nolock(void) -{ - set_hwparams(handle); -} - -void pcm_dma_apply_settings(void) -{ - pcm_play_lock(); - pcm_dma_apply_settings_nolock(); - pcm_play_unlock(); -} - - -void pcm_play_dma_pause(bool pause) -{ - (void)pause; -} - - -void pcm_play_dma_stop(void) -{ - pcm_stop(handle); -} - -void pcm_play_dma_start(const void *addr, size_t size) -{ -#if defined(DX50) || defined(DX90) - /* headphone output relay: if this is done at startup already, a loud click is audible on headphones. Here, some time later, - the output caps are charged a bit and the click is much softer */ - system("/system/bin/muteopen"); -#endif - pcm_dma_apply_settings_nolock(); - - pcm_data = addr; - pcm_size = size; - - while (1) - { - snd_pcm_state_t state = pcm_state(handle); - switch (state) - { - case PCM_STATE_RUNNING: - return; - case PCM_STATE_XRUN: - { - printf("No handler for STATE_XRUN!\n"); - continue; - } - case PCM_STATE_PREPARED: - { /* prepared state, we need to fill the buffer with silence before - * starting */ - int err = async_rw(handle); - if (err < 0) - printf("Start error: %d\n", err); - return; - } - case PCM_STATE_PAUSED: - { /* paused, simply resume */ - pcm_play_dma_pause(0); - return; - } - case PCM_STATE_DRAINING: - /* run until drained */ - continue; - default: - DEBUGF("Unhandled state: %d\n", state); - return; - } - } -} - -size_t pcm_get_bytes_waiting(void) -{ - return pcm_size; -} - -const void * pcm_play_dma_get_peak_buffer(int *count) -{ - uintptr_t addr = (uintptr_t)pcm_data; - *count = pcm_size / 4; - return (void *)((addr + 3) & ~3); -} - -void pcm_play_dma_postinit(void) -{ - return; -} - -void pcm_set_mixer_volume(int volume) -{ -#if defined(DX50) || defined(DX90) - /* -990 to 0 -> 0 to 255 */ - int val = (volume+990)*255/990; -#if defined(DX50) - FILE *f = fopen("/dev/codec_volume", "w"); -#else /* DX90 */ - FILE *f = fopen("/sys/class/codec/es9018_volume", "w"); -#endif /* DX50 */ - fprintf(f, "%d", val); - fclose(f); -#else - (void)volume; -#endif /* DX50 || DX90 */ -} - -#ifdef HAVE_RECORDING -void pcm_rec_lock(void) -{ -} - -void pcm_rec_unlock(void) -{ -} - -void pcm_rec_dma_init(void) -{ -} - -void pcm_rec_dma_close(void) -{ -} - -void pcm_rec_dma_start(void *start, size_t size) -{ - (void)start; - (void)size; -} - -void pcm_rec_dma_stop(void) -{ -} - -const void * pcm_rec_dma_get_peak_buffer(void) -{ - return NULL; -} - -void audiohw_set_recvol(int left, int right, int type) -{ - (void)left; - (void)right; - (void)type; -} - -#endif /* HAVE_RECORDING */ |