0f8aedbe94
* Adds some additional niftyness like a floating popup display that is implemented in an OSD library for use by other plugins. * Speed changes are now gradual for both views and follow a curve derived from some fiddling around to get a nice feel. * Refined a few behavioral things overall. It needs a bit of help from a direct PCM channel callback so it may capture PCM for waveform display. Also need a few other core routines to help out for the OSD. Messes with some keymaps. Some targets need keymaps to access the different views. Some devices can't support the additional view because it requires a large buffer ( > 1 s) for samples. If the plugin buffer is small, they can still use the popup display since the plugin is also much smaller in that case. Slow speed waveform needs some refining so it draws gradually like a real oscilloscope but I'll stick with what it is, for the moment. Change-Id: Ieb5b7922a2238264e9b19a58cb437739194eb036 Reviewed-on: http://gerrit.rockbox.org/245 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested-by: Michael Sevakis <jethead71@rockbox.org>
130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef PCM_MIXER_H
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#define PCM_MIXER_H
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#include <sys/types.h>
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/** Simple config **/
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/* Length of PCM frames (always) */
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#if CONFIG_CPU == PP5002
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/* There's far less time to do mixing because HW FIFOs are short */
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#define MIX_FRAME_SAMPLES 64
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#elif (CONFIG_PLATFORM & PLATFORM_MAEMO5)
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/* Maemo 5 needs 2048 samples for decent performance.
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Otherwise the locking overhead inside gstreamer costs too much */
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#define MIX_FRAME_SAMPLES 2048
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/* Assume HW DMA engine is available or sufficient latency exists in the
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PCM pathway */
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#else
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#define MIX_FRAME_SAMPLES 256
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#endif
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#if defined(CPU_COLDFIRE) || defined(CPU_PP)
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/* For Coldfire, it's just faster
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For PortalPlayer, this also avoids more expensive cache coherency */
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#define DOWNMIX_BUF_IBSS IBSS_ATTR
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#else
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/* Otherwise can't DMA from IRAM, IRAM is pointless or worse */
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#define DOWNMIX_BUF_IBSS
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#endif
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#if defined(CPU_COLDFIRE) || defined(CPU_PP)
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#define MIXER_CALLBACK_ICODE ICODE_ATTR
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#else
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#define MIXER_CALLBACK_ICODE
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#endif
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/** Definitions **/
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/* Channels are preassigned for simplicity */
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enum pcm_mixer_channel
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{
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PCM_MIXER_CHAN_PLAYBACK = 0,
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PCM_MIXER_CHAN_VOICE,
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#ifndef HAVE_HARDWARE_BEEP
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PCM_MIXER_CHAN_BEEP,
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#endif
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/* Add new channel indexes above this line */
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PCM_MIXER_NUM_CHANNELS,
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};
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/* Channel playback states */
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enum channel_status
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{
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CHANNEL_STOPPED = 0,
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CHANNEL_PLAYING,
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CHANNEL_PAUSED,
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};
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#define MIX_AMP_UNITY 0x00010000
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#define MIX_AMP_MUTE 0x00000000
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/** Public interfaces **/
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/* Start playback on a channel */
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void mixer_channel_play_data(enum pcm_mixer_channel channel,
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pcm_play_callback_type get_more,
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const void *start, size_t size);
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/* Pause or resume a channel (when started) */
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void mixer_channel_play_pause(enum pcm_mixer_channel channel, bool play);
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/* Stop playback on a channel */
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void mixer_channel_stop(enum pcm_mixer_channel channel);
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/* Set channel's amplitude factor */
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void mixer_channel_set_amplitude(enum pcm_mixer_channel channel,
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unsigned int amplitude);
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/* Return channel's playback status */
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enum channel_status mixer_channel_status(enum pcm_mixer_channel channel);
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/* Returns amount data remaining in channel before next callback */
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size_t mixer_channel_get_bytes_waiting(enum pcm_mixer_channel channel);
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/* Return pointer to channel's playing audio data and the size remaining */
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const void * mixer_channel_get_buffer(enum pcm_mixer_channel channel,
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int *count);
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/* Calculate peak values for channel */
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void mixer_channel_calculate_peaks(enum pcm_mixer_channel channel,
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struct pcm_peaks *peaks);
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/* Adjust channel pointer by a given offset to support movable buffers */
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void mixer_adjust_channel_address(enum pcm_mixer_channel channel,
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off_t offset);
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/* Set a hook that is called upon getting a new source buffer for a channel
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NOTE: Called for each buffer, not each mixer chunk */
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typedef void (*chan_buffer_hook_fn_type)(const void *start, size_t size);
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void mixer_channel_set_buffer_hook(enum pcm_mixer_channel channel,
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chan_buffer_hook_fn_type fn);
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/* Stop ALL channels and PCM and reset state */
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void mixer_reset(void);
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#endif /* PCM_MIXER_H */
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