iBasso DX50/DX90: Major code cleanup and reorganization.

Reorganization

- Separated iBasso devices from PLATFORM_ANDROID. These are now standlone
  hosted targets. Most device specific code is in the
  firmware/target/hosted/ibasso directory.
- No dependency on Android SDK, only the Android NDK is needed.
  32 bit Android NDK and Android API Level 16.
- Separate implementation for each device where feasible.

Code cleanup

- Rewrite of existing code, from simple reformat to complete reimplementation.
- New backlight interface, seperating backlight from touchscreen.
- Rewrite of device button handler, removing unneeded code and fixing memory
  leaks.
- New Debug messages interface logging to Android adb logcat (DEBUGF, panicf,
  logf).
- Rewrite of lcd device handler, removing unneeded code and fixing memory leaks.
- Rewrite of audiohw device handler/pcm interface, removing unneeded code and
  fixing memory leaks, enabling 44.1/48kHz pthreaded playback.
- Rewrite of power and powermng, proper shutdown, using batterylog results
  (see http://gerrit.rockbox.org/r/#/c/1047/).
- Rewrite of configure (Android NDK) and device specific config.
- Rewrite of the Android NDK specific Makefile.

Misc

- All plugins/games/demos activated.
- Update tinyalsa to latest from https://github.com/tinyalsa/tinyalsa.

Includes

- http://gerrit.rockbox.org/r/#/c/993/
- http://gerrit.rockbox.org/r/#/c/1010/
- http://gerrit.rockbox.org/r/#/c/1035/

Does not include http://gerrit.rockbox.org/r/#/c/1007/ due to new backlight
interface and new option for hold switch, touchscreen, physical button
interaction.

Rockbox needs the iBasso DX50/DX90 loader for startup, see
http://gerrit.rockbox.org/r/#/c/1099/

The loader expects Rockbox to be installed in /mnt/sdcard/.rockbox/. If
/mnt/sdcard/ is accessed as USB mass storage device, Rockbox will exit
gracefully and the loader will restart Rockbox on USB disconnect.

Tested on iBasso DX50.
Compiled (not tested) for iBasso DX90.
Compiled (not tested) for PLATFORM_ANDROID.

Change-Id: I5f5e22e68f5b4cf29c28e2b40b2c265f2beb7ab7

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 */