From 20b3897474cfa680e33f7d03feb6644390fd2b20 Mon Sep 17 00:00:00 2001 From: Miika Pekkarinen Date: Wed, 13 Jul 2005 12:48:22 +0000 Subject: [PATCH] Separated buffering stuff from pcm_playback to pcmbuf. Renamed some function calls (audiobuffer -> pcmbuf etc.). git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7131 a1c6a512-1295-4272-9138-f99709370657 --- apps/SOURCES | 1 + apps/codecs.h | 7 +- apps/codecs/a52.c | 2 +- apps/codecs/flac.c | 2 +- apps/codecs/mpa.c | 10 +- apps/codecs/mpc.c | 4 +- apps/codecs/vorbis.c | 2 +- apps/codecs/wav.c | 2 +- apps/codecs/wavpack.c | 2 +- apps/main.c | 4 +- apps/pcmbuf.c | 550 +++++++++++++++++++++++++++++++++ apps/pcmbuf.h | 50 +++ apps/playback.c | 161 +++------- apps/plugin.h | 3 +- apps/settings.c | 3 +- apps/settings_menu.c | 3 +- firmware/export/pcm_playback.h | 30 +- firmware/pcm_playback.c | 526 +------------------------------ uisimulator/common/stubs.c | 29 ++ 19 files changed, 705 insertions(+), 686 deletions(-) create mode 100644 apps/pcmbuf.c create mode 100644 apps/pcmbuf.h diff --git a/apps/SOURCES b/apps/SOURCES index 271c2ba48c..c1f3dfc88e 100644 --- a/apps/SOURCES +++ b/apps/SOURCES @@ -49,6 +49,7 @@ recorder/radio.c recorder/recording.c #endif #if CONFIG_HWCODEC == MASNONE +pcmbuf.c playback.c metadata.c codecs.c diff --git a/apps/codecs.h b/apps/codecs.h index a675245d27..b2cf9e5a1e 100644 --- a/apps/codecs.h +++ b/apps/codecs.h @@ -137,8 +137,8 @@ struct codec_api { void* (*get_codec_memory)(long *size); /* Insert PCM data into audio buffer for playback. Playback will start automatically. */ - bool (*audiobuffer_insert)(char *data, long length); - bool (*audiobuffer_insert_split)(void *ch1, void *ch2, long length); + bool (*pcmbuf_insert)(char *data, long length); + bool (*pcmbuf_insert_split)(void *ch1, void *ch2, long length); /* Set song position in WPS (value in ms). */ void (*set_elapsed)(unsigned int value); @@ -238,8 +238,7 @@ struct codec_api { void (*bitswap)(unsigned char *data, int length); #endif #if CONFIG_HWCODEC == MASNONE - void (*pcm_play_data)(const unsigned char *start, int size, - void (*get_more)(unsigned char** start, long*size)); + void (*pcm_play_data)(void (*get_more)(unsigned char** start, long*size)); void (*pcm_play_stop)(void); void (*pcm_set_frequency)(unsigned int frequency); bool (*pcm_is_playing)(void); diff --git a/apps/codecs/a52.c b/apps/codecs/a52.c index 663e7941ec..3dacc52ced 100644 --- a/apps/codecs/a52.c +++ b/apps/codecs/a52.c @@ -59,7 +59,7 @@ void output_audio(sample_t* samples,int flags) { } rb->yield(); - while(!ci->audiobuffer_insert((unsigned char*)int16_samples,256*2*2)) + while(!ci->pcmbuf_insert((unsigned char*)int16_samples,256*2*2)) rb->yield(); } diff --git a/apps/codecs/flac.c b/apps/codecs/flac.c index d7ae037d26..259686ed3f 100644 --- a/apps/codecs/flac.c +++ b/apps/codecs/flac.c @@ -83,7 +83,7 @@ FLAC__StreamDecoderWriteStatus flac_write_handler(const FLAC__SeekableStreamDeco ci->set_elapsed(samplesdone/(ci->id3->frequency/1000)); rb->yield(); - while (!ci->audiobuffer_insert(pcmbuf, data_size)) + while (!ci->pcmbuf_insert(pcmbuf, data_size)) rb->yield(); return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; diff --git a/apps/codecs/mpa.c b/apps/codecs/mpa.c index da469f2827..77565679a2 100644 --- a/apps/codecs/mpa.c +++ b/apps/codecs/mpa.c @@ -221,16 +221,16 @@ enum codec_status codec_start(struct codec_api* api) ci->configure(DSP_SET_STEREO_MODE, (int *)STEREO_NONINTERLEAVED); current_stereo_mode = STEREO_NONINTERLEAVED; } - ci->audiobuffer_insert_split(&Synth.pcm.samples[0][start_skip], - &Synth.pcm.samples[1][start_skip], - (Synth.pcm.length - start_skip) * 4); + ci->pcmbuf_insert_split(&Synth.pcm.samples[0][start_skip], + &Synth.pcm.samples[1][start_skip], + (Synth.pcm.length - start_skip) * 4); } else { if (current_stereo_mode != STEREO_MONO) { ci->configure(DSP_SET_STEREO_MODE, (int *)STEREO_MONO); current_stereo_mode = STEREO_MONO; } - ci->audiobuffer_insert((char *)&Synth.pcm.samples[0][start_skip], - (Synth.pcm.length - start_skip) * 4); + ci->pcmbuf_insert((char *)&Synth.pcm.samples[0][start_skip], + (Synth.pcm.length - start_skip) * 4); } start_skip = 0; /* not very elegant, and might want to keep this value */ diff --git a/apps/codecs/mpc.c b/apps/codecs/mpc.c index e3a13c5bc1..abcb30b653 100644 --- a/apps/codecs/mpc.c +++ b/apps/codecs/mpc.c @@ -166,7 +166,7 @@ enum codec_status codec_start(struct codec_api *api) /* Flush the buffer if it is full. */ if (OutputPtr == OutputBufferEnd) { ci->yield(); - while (!ci->audiobuffer_insert(OutputBuffer, OUTPUT_BUFFER_SIZE)) + while (!ci->pcmbuf_insert(OutputBuffer, OUTPUT_BUFFER_SIZE)) ci->yield(); ci->set_elapsed(samplesdone/(frequency/1000)); OutputPtr = OutputBuffer; @@ -178,7 +178,7 @@ enum codec_status codec_start(struct codec_api *api) /* Flush the remaining data in the output buffer */ if (OutputPtr > OutputBuffer) { ci->yield(); - while (!ci->audiobuffer_insert(OutputBuffer, OutputPtr - OutputBuffer)) + while (!ci->pcmbuf_insert(OutputBuffer, OutputPtr - OutputBuffer)) ci->yield(); } diff --git a/apps/codecs/vorbis.c b/apps/codecs/vorbis.c index 03f1ae95b5..20fb79aa1d 100644 --- a/apps/codecs/vorbis.c +++ b/apps/codecs/vorbis.c @@ -262,7 +262,7 @@ enum codec_status codec_start(struct codec_api* api) } else if (n < 0) { DEBUGF("Error decoding frame\n"); } else { - while (!rb->audiobuffer_insert(pcmbuf, n)) { + while (!rb->pcmbuf_insert(pcmbuf, n)) { rb->sleep(1); if ( rb->seek_time ) { /* Hmmm, a seek was requested. Throw out the diff --git a/apps/codecs/wav.c b/apps/codecs/wav.c index 49bd12da1f..527d33d286 100644 --- a/apps/codecs/wav.c +++ b/apps/codecs/wav.c @@ -138,7 +138,7 @@ enum codec_status codec_start(struct codec_api* api) ci->set_elapsed(samplesdone/(ci->id3->frequency/1000)); rb->yield(); - while (!ci->audiobuffer_insert((unsigned char*)wavbuf, n)) + while (!ci->pcmbuf_insert((unsigned char*)wavbuf, n)) rb->yield(); ci->advance_buffer(n); diff --git a/apps/codecs/wavpack.c b/apps/codecs/wavpack.c index d363cbecd6..f76ac5acd7 100644 --- a/apps/codecs/wavpack.c +++ b/apps/codecs/wavpack.c @@ -189,7 +189,7 @@ enum codec_status codec_start(struct codec_api* api) if (ci->stop_codec || ci->reload_codec) break; - while (!ci->audiobuffer_insert ((char *) temp_buffer, nsamples * 4)) + while (!ci->pcmbuf_insert ((char *) temp_buffer, nsamples * 4)) rb->sleep (1); ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10); diff --git a/apps/main.c b/apps/main.c index 4dee44421a..17f1540beb 100644 --- a/apps/main.c +++ b/apps/main.c @@ -62,7 +62,7 @@ #include "database.h" #if (CONFIG_HWCODEC == MASNONE) -#include "pcm_playback.h" +#include "pcmbuf.h" #endif #if defined(IRIVER_H100_SERIES) && !defined(SIMULATOR) #include "pcm_record.h" @@ -283,7 +283,7 @@ void init(void) global_settings.superbass); audio_init(); #if (CONFIG_HWCODEC == MASNONE) - pcm_init(); + pcmbuf_init(); sound_settings_apply(); #endif #if defined(IRIVER_H100_SERIES) && !defined(SIMULATOR) diff --git a/apps/pcmbuf.c b/apps/pcmbuf.c new file mode 100644 index 0000000000..1f08274fc4 --- /dev/null +++ b/apps/pcmbuf.c @@ -0,0 +1,550 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2005 by Miika Pekkarinen + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#include +#include +#include "config.h" +#include "debug.h" +#include "panic.h" +#include +#include "pcmbuf.h" +#include "pcm_playback.h" +#include "logf.h" +#ifndef SIMULATOR +#include "cpu.h" +#endif +#include "system.h" +#include +#include "buffer.h" + +#define CHUNK_SIZE 32768 +/* Must be a power of 2 */ +#define NUM_PCM_BUFFERS (PCMBUF_SIZE / CHUNK_SIZE) +#define NUM_PCM_BUFFERS_MASK (NUM_PCM_BUFFERS - 1) +#define PCMBUF_WATERMARK (CHUNK_SIZE * 10) +#define PCMBUF_CF_WATERMARK (PCMBUF_SIZE - CHUNK_SIZE*8) + +/* Audio buffer related settings. */ +static char *audiobuffer; +static long audiobuffer_pos; /* Current audio buffer write index. */ +long audiobuffer_free; /* Amount of bytes left in the buffer. */ +static long audiobuffer_fillpos; /* Amount audiobuffer_pos will be increased. */ +static char *guardbuf; + +static void (*pcmbuf_event_handler)(void); + +/* Crossfade related. */ +static int crossfade_mode; +static bool crossfade_enabled; +static bool crossfade_active; +static bool crossfade_init; +static int crossfade_pos; +static int crossfade_amount; +static int crossfade_rem; + + +static bool boost_mode; + +/* Crossfade modes. If CFM_CROSSFADE is selected, normal + * crossfader will activate. Selecting CFM_FLUSH is a special + * operation that only overwrites the pcm buffer without crossfading. + */ +enum { + CFM_CROSSFADE, + CFM_FLUSH +}; + +/* Structure we can use to queue pcm chunks in memory to be played + * by the driver code. */ +struct pcmbufdesc +{ + void *addr; + int size; + /* Call this when the buffer has been played */ + void (*callback)(void); +} pcmbuffers[NUM_PCM_BUFFERS]; + +volatile int pcmbuf_read_index; +volatile int pcmbuf_write_index; +int pcmbuf_unplayed_bytes; +int pcmbuf_watermark; +void (*pcmbuf_watermark_event)(int bytes_left); +static int last_chunksize; + +static void pcmbuf_boost(bool state) +{ + static bool boost_state = false; + + if (crossfade_init || crossfade_active || boost_mode) + return ; + + if (state != boost_state) { +#ifdef HAVE_ADJUSTABLE_CPU_FREQ + cpu_boost(state); +#endif + boost_state = state; + } +} + +int pcmbuf_num_used_buffers(void) +{ + return (pcmbuf_write_index - pcmbuf_read_index) & NUM_PCM_BUFFERS_MASK; +} + +static void pcmbuf_callback(unsigned char** start, long* size) +{ + struct pcmbufdesc *desc = &pcmbuffers[pcmbuf_read_index]; + int sz; + + pcmbuf_unplayed_bytes -= last_chunksize; + audiobuffer_free += last_chunksize; + + + if(desc->size == 0) + { + /* The buffer is finished, call the callback function */ + if(desc->callback) + desc->callback(); + + /* Advance to the next buffer */ + pcmbuf_read_index = (pcmbuf_read_index + 1) & NUM_PCM_BUFFERS_MASK; + desc = &pcmbuffers[pcmbuf_read_index]; + } + + if(pcmbuf_num_used_buffers()) + { + /* Play max 64K at a time */ + //sz = MIN(desc->size, 32768); + sz = desc->size; + *start = desc->addr; + *size = sz; + + /* Update the buffer descriptor */ + desc->size -= sz; + desc->addr += sz; + + last_chunksize = sz; + } + else + { + /* No more buffers */ + *size = 0; + if (pcmbuf_event_handler) + pcmbuf_event_handler(); + } + + logf("cbfm:%d", *size); + if(pcmbuf_unplayed_bytes <= pcmbuf_watermark) + { + if(pcmbuf_watermark_event) + { + pcmbuf_watermark_event(pcmbuf_unplayed_bytes); + } + } +} + +void pcmbuf_set_watermark(int numbytes, void (*callback)(int bytes_left)) +{ + pcmbuf_watermark = numbytes; + pcmbuf_watermark_event = callback; +} + +bool pcmbuf_add_chunk(void *addr, int size, void (*callback)(void)) +{ + /* We don't use the last buffer, since we can't see the difference + between the full and empty condition */ + if(pcmbuf_num_used_buffers() < (NUM_PCM_BUFFERS - 2)) + { + pcmbuffers[pcmbuf_write_index].addr = addr; + pcmbuffers[pcmbuf_write_index].size = size; + pcmbuffers[pcmbuf_write_index].callback = callback; + pcmbuf_write_index = (pcmbuf_write_index+1) & NUM_PCM_BUFFERS_MASK; + pcmbuf_unplayed_bytes += size; + return true; + } + else + return false; +} + +void pcmbuf_watermark_callback(int bytes_left) +{ + /* Fill audio buffer by boosting cpu */ + pcmbuf_boost(true); + if (bytes_left <= CHUNK_SIZE * 2) + crossfade_active = false; +} + +void pcmbuf_set_boost_mode(bool state) +{ + if (state) + pcmbuf_boost(true); + boost_mode = state; +} + +void pcmbuf_add_event(void (*event_handler)(void)) +{ + pcmbuf_event_handler = event_handler; +} + +unsigned int pcmbuf_get_latency(void) +{ + int latency; + + /* This has to be done better. */ + latency = (PCMBUF_SIZE - audiobuffer_free - CHUNK_SIZE)/4 / (44100/1000); + if (latency < 0) + latency = 0; + + return latency; +} + +bool pcmbuf_is_lowdata(void) +{ + if (!pcm_is_playing() || pcm_is_paused() || crossfade_init || crossfade_active) + return false; + + if (pcmbuf_unplayed_bytes < PCMBUF_WATERMARK) + return true; + + return false; +} + +bool pcmbuf_crossfade_init(void) +{ + if (PCMBUF_SIZE - audiobuffer_free < CHUNK_SIZE * 8 || !crossfade_enabled + || crossfade_active || crossfade_init) { + return false; + } + logf("pcmbuf_crossfade_init"); + pcmbuf_boost(true); + crossfade_mode = CFM_CROSSFADE; + crossfade_init = true; + + return true; + +} + +void pcmbuf_play_stop(void) +{ + pcm_play_stop(); + last_chunksize = 0; + pcmbuf_unplayed_bytes = 0; + pcmbuf_read_index = 0; + pcmbuf_write_index = 0; + audiobuffer_pos = 0; + audiobuffer_fillpos = 0; + audiobuffer_free = PCMBUF_SIZE; + crossfade_init = false; + crossfade_active = false; + + pcmbuf_set_boost_mode(false); + pcmbuf_boost(false); + +} + +void pcmbuf_init(void) +{ + audiobuffer = &audiobuf[(audiobufend - audiobuf) - + PCMBUF_SIZE - PCMBUF_GUARD]; + guardbuf = &audiobuffer[PCMBUF_SIZE]; + pcmbuf_event_handler = NULL; + pcm_init(); + pcmbuf_play_stop(); +} + +/** Initialize a track switch so that audio playback will not stop but + * the switch to next track would happen as soon as possible. + */ +void pcmbuf_flush_audio(void) +{ + if (crossfade_init || crossfade_active || !pcm_is_playing()) { + pcmbuf_play_stop(); + return ; + } + + crossfade_mode = CFM_FLUSH; + crossfade_init = true; +} + +void pcmbuf_flush_fillpos(void) +{ + int copy_n; + + copy_n = MIN(audiobuffer_fillpos, CHUNK_SIZE); + + if (copy_n) { + while (!pcmbuf_add_chunk(&audiobuffer[audiobuffer_pos], + copy_n, pcmbuf_event_handler)) { + pcmbuf_boost(false); + sleep(1); + /* This is a fatal error situation that should never happen. */ + if (!pcm_is_playing()) { + logf("pcm_flush_fillpos error"); + break ; + } + } + pcmbuf_event_handler = NULL; + audiobuffer_pos += copy_n; + if (audiobuffer_pos >= PCMBUF_SIZE) + audiobuffer_pos -= PCMBUF_SIZE; + audiobuffer_free -= copy_n; + audiobuffer_fillpos -= copy_n; + } +} + +static void crossfade_start(void) +{ + int bytesleft = pcmbuf_unplayed_bytes; + + crossfade_init = 0; + if (bytesleft < CHUNK_SIZE * 3) { + logf("crossfade rejected"); + pcmbuf_play_stop(); + return ; + } + + logf("crossfade_start"); + pcmbuf_flush_fillpos(); + pcmbuf_boost(true); + crossfade_active = true; + crossfade_pos = audiobuffer_pos; + + switch (crossfade_mode) { + case CFM_CROSSFADE: + crossfade_amount = (bytesleft - (CHUNK_SIZE * 2))/2; + crossfade_rem = crossfade_amount; + break ; + + case CFM_FLUSH: + crossfade_amount = (bytesleft - (CHUNK_SIZE * 2))/2; + crossfade_rem = crossfade_amount; + break ; + } + + crossfade_pos -= crossfade_amount*2; + if (crossfade_pos < 0) + crossfade_pos += PCMBUF_SIZE; +} + +static __inline +int crossfade(short *buf, const short *buf2, int length) +{ + int size, i; + int val1, val2; + + size = MIN(length, crossfade_rem); + switch (crossfade_mode) { + case CFM_CROSSFADE: + val1 = (crossfade_rem<<10)/crossfade_amount; + val2 = ((crossfade_amount-crossfade_rem)<<10)/crossfade_amount; + + for (i = 0; i < size; i++) { + buf[i] = ((buf[i] * val1) + (buf2[i] * val2)) >> 10; + } + break ; + + case CFM_FLUSH: + for (i = 0; i < size; i++) { + buf[i] = buf2[i]; + } + //memcpy((char *)buf, (char *)buf2, size*2); + break ; + } + + crossfade_rem -= size; + if (crossfade_rem <= 0) + crossfade_active = false; + + return size; +} + +static bool prepare_insert(long length) +{ + if (crossfade_init) + crossfade_start(); + + if (audiobuffer_free < length + audiobuffer_fillpos + + CHUNK_SIZE && !crossfade_active) { + pcmbuf_boost(false); + return false; + } + + if (!pcm_is_playing()) { + pcmbuf_boost(true); + crossfade_active = false; + if (audiobuffer_free < PCMBUF_SIZE - CHUNK_SIZE*4) { + logf("pcm starting"); + pcm_play_data(pcmbuf_callback); + } + } + + return true; +} + +void* pcmbuf_request_buffer(long length, long *realsize) +{ + void *ptr = NULL; + + while (audiobuffer_free < length + audiobuffer_fillpos + + CHUNK_SIZE && !crossfade_active) { + pcmbuf_boost(false); + sleep(1); + } + + if (crossfade_active) { + *realsize = MIN(length, PCMBUF_GUARD); + ptr = &guardbuf[0]; + } else { + *realsize = MIN(length, PCMBUF_SIZE - audiobuffer_pos + - audiobuffer_fillpos); + if (*realsize < length) { + *realsize += MIN((long)(length - *realsize), PCMBUF_GUARD); + } + ptr = &audiobuffer[audiobuffer_pos + audiobuffer_fillpos]; + } + + return ptr; +} + +bool pcmbuf_is_crossfade_active(void) +{ + return crossfade_active || crossfade_init; +} + +void pcmbuf_flush_buffer(long length) +{ + int copy_n; + char *buf; + + prepare_insert(length); + + if (crossfade_active) { + buf = &guardbuf[0]; + length = MIN(length, PCMBUF_GUARD); + while (length > 0 && crossfade_active) { + copy_n = MIN(length, PCMBUF_SIZE - crossfade_pos); + copy_n = 2 * crossfade((short *)&audiobuffer[crossfade_pos], + (const short *)buf, copy_n/2); + buf += copy_n; + length -= copy_n; + crossfade_pos += copy_n; + if (crossfade_pos >= PCMBUF_SIZE) + crossfade_pos -= PCMBUF_SIZE; + } + + while (length > 0) { + copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos); + memcpy(&audiobuffer[audiobuffer_pos], buf, copy_n); + audiobuffer_fillpos = copy_n; + buf += copy_n; + length -= copy_n; + if (length > 0) + pcmbuf_flush_fillpos(); + } + } + + audiobuffer_fillpos += length; + + try_flush: + if (audiobuffer_fillpos < CHUNK_SIZE && PCMBUF_SIZE + - audiobuffer_pos - audiobuffer_fillpos > 0) + return ; + + copy_n = audiobuffer_fillpos - (PCMBUF_SIZE - audiobuffer_pos); + if (copy_n > 0) { + audiobuffer_fillpos -= copy_n; + pcmbuf_flush_fillpos(); + copy_n = MIN(copy_n, PCMBUF_GUARD); + memcpy(&audiobuffer[0], &guardbuf[0], copy_n); + audiobuffer_fillpos = copy_n; + goto try_flush; + } + pcmbuf_flush_fillpos(); +} + +bool pcmbuf_insert_buffer(char *buf, long length) +{ + long copy_n = 0; + + if (!prepare_insert(length)) + return false; + + + if (crossfade_active) { + while (length > 0 && crossfade_active) { + copy_n = MIN(length, PCMBUF_SIZE - crossfade_pos); + + copy_n = 2 * crossfade((short *)&audiobuffer[crossfade_pos], + (const short *)buf, copy_n/2); + buf += copy_n; + length -= copy_n; + crossfade_pos += copy_n; + if (crossfade_pos >= PCMBUF_SIZE) + crossfade_pos -= PCMBUF_SIZE; + } + + while (length > 0) { + copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos); + memcpy(&audiobuffer[audiobuffer_pos], buf, copy_n); + audiobuffer_fillpos = copy_n; + buf += copy_n; + length -= copy_n; + if (length > 0) + pcmbuf_flush_fillpos(); + } + } + + while (length > 0) { + copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos - + audiobuffer_fillpos); + copy_n = MIN(CHUNK_SIZE - audiobuffer_fillpos, copy_n); + + memcpy(&audiobuffer[audiobuffer_pos+audiobuffer_fillpos], + buf, copy_n); + buf += copy_n; + audiobuffer_fillpos += copy_n; + length -= copy_n; + + /* Pre-buffer to meet CHUNK_SIZE requirement */ + if (audiobuffer_fillpos < CHUNK_SIZE && length == 0) { + return true; + } + + pcmbuf_flush_fillpos(); + } + + return true; +} + +void pcmbuf_crossfade_enable(bool on_off) +{ + crossfade_enabled = on_off; + + if (crossfade_enabled) { + pcmbuf_set_watermark(PCMBUF_CF_WATERMARK, pcmbuf_watermark_callback); + } else { + pcmbuf_set_watermark(PCMBUF_WATERMARK, pcmbuf_watermark_callback); + } +} + +bool pcmbuf_is_crossfade_enabled(void) +{ + return crossfade_enabled; +} + diff --git a/apps/pcmbuf.h b/apps/pcmbuf.h new file mode 100644 index 0000000000..2b4023fb98 --- /dev/null +++ b/apps/pcmbuf.h @@ -0,0 +1,50 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2005 by Miika Pekkarinen + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#ifndef PCMBUF_H +#define PCMBUF_H + +/* Guard buffer for crossfader when dsp is enabled. */ +#define PCMBUF_GUARD 32768 + +/* PCM audio buffer. */ +#define PCMBUF_SIZE (1*1024*1024) + +void pcmbuf_init(void); + +void pcmbuf_play_stop(void); +bool pcmbuf_is_crossfade_active(void); + +/* These functions are for playing chained buffers of PCM data */ +bool pcmbuf_add_chunk(void *addr, int size, void (*callback)(void)); +int pcmbuf_num_used_buffers(void); +void pcmbuf_set_watermark(int numbytes, void (*callback)(int bytes_left)); + +void pcmbuf_set_boost_mode(bool state); +bool pcmbuf_is_lowdata(void); +void pcmbuf_flush_audio(void); +bool pcmbuf_crossfade_init(void); +void pcmbuf_add_event(void (*event_handler)(void)); +unsigned int pcmbuf_get_latency(void); +bool pcmbuf_insert_buffer(char *buf, long length); +void pcmbuf_flush_buffer(long length); +void* pcmbuf_request_buffer(long length, long *realsize); +bool pcmbuf_is_crossfade_enabled(void); +void pcmbuf_crossfade_enable(bool on_off); + +#endif diff --git a/apps/playback.c b/apps/playback.c index 671312583b..0e20d97fb4 100644 --- a/apps/playback.c +++ b/apps/playback.c @@ -46,6 +46,7 @@ #include "screens.h" #include "playlist.h" #include "playback.h" +#include "pcmbuf.h" #include "pcm_playback.h" #include "buffer.h" #include "dsp.h" @@ -173,91 +174,7 @@ static bool v1first = false; static void mp3_set_elapsed(struct mp3entry* id3); int mp3_get_file_pos(void); -/* Simulator stubs. */ -#ifdef SIMULATOR -bool pcm_insert_buffer(char *buf, long length) -{ - (void)buf; - (void)length; - - return true; -} - -void pcm_flush_buffer(long length) -{ - (void)length; -} - - -void* pcm_request_buffer(long length, long *realsize) -{ - static char temp_audiobuffer[32768]; - - *realsize = MIN((int)sizeof(temp_audiobuffer), length); - - return temp_audiobuffer; -} - -void audiobuffer_add_event(void (*event_handler)(void)) -{ - event_handler(); -} - -unsigned int audiobuffer_get_latency() -{ - return 0; -} - -void pcm_play_stop(void) -{ -} - -bool pcm_is_playing(void) -{ - return false; -} - -bool pcm_is_crossfade_active(void) -{ - return false; -} - -bool pcm_is_lowdata(void) -{ - return false; -} - -void pcm_flush_audio(void) -{ -} - -bool pcm_crossfade_init(void) -{ - return false; -} - -void pcm_set_boost_mode(bool state) -{ - (void)state; -} - -bool pcm_is_crossfade_enabled(void) -{ - return false; -} - -void pcm_play_pause(bool state) -{ - (void)state; -} - -int ata_sleep(void) -{ - return 0; -} -#endif - -bool codec_audiobuffer_insert_callback(char *buf, long length) +bool codec_pcmbuf_insert_callback(char *buf, long length) { char *dest; long realsize; @@ -284,11 +201,11 @@ bool codec_audiobuffer_insert_callback(char *buf, long length) while (length > 0) { /* Request a few extra bytes for resampling. */ /* FIXME: Required extra bytes SHOULD be calculated. */ - while ((dest = pcm_request_buffer(length+16384, &realsize)) == NULL) + while ((dest = pcmbuf_request_buffer(length+16384, &realsize)) == NULL) yield(); if (realsize < 16384) { - pcm_flush_buffer(0); + pcmbuf_flush_buffer(0); continue ; } @@ -300,7 +217,7 @@ bool codec_audiobuffer_insert_callback(char *buf, long length) } else { processed_length = dsp_process(dest, buf, realsize >> (mono + 1)); } - pcm_flush_buffer(processed_length); + pcmbuf_flush_buffer(processed_length); length -= realsize; buf += realsize << (factor + mono); } @@ -308,7 +225,7 @@ bool codec_audiobuffer_insert_callback(char *buf, long length) return true; } -bool codec_audiobuffer_insert_split_callback(void *ch1, void *ch2, +bool codec_pcmbuf_insert_split_callback(void *ch1, void *ch2, long length) { char *dest; @@ -326,11 +243,11 @@ bool codec_audiobuffer_insert_split_callback(void *ch1, void *ch2, while (length > 0) { /* Request a few extra bytes for resampling. */ - while ((dest = pcm_request_buffer(length+4096, &realsize)) == NULL) + while ((dest = pcmbuf_request_buffer(length+4096, &realsize)) == NULL) yield(); if (realsize < 4096) { - pcm_flush_buffer(0); + pcmbuf_flush_buffer(0); continue ; } @@ -338,7 +255,7 @@ bool codec_audiobuffer_insert_split_callback(void *ch1, void *ch2, processed_length = dsp_process(dest, ch1, realsize / 4) * 2; dsp_process(dest, ch2, realsize / 4); - pcm_flush_buffer(processed_length); + pcmbuf_flush_buffer(processed_length); length -= realsize; ch1 += realsize >> factor; ch2 += realsize >> factor; @@ -360,7 +277,7 @@ void codec_set_elapsed_callback(unsigned int value) if (ci.stop_codec) return ; - latency = audiobuffer_get_latency(); + latency = pcmbuf_get_latency(); if (value < latency) { cur_ti->id3.elapsed = 0; @@ -377,10 +294,10 @@ void codec_set_offset_callback(unsigned int value) if (ci.stop_codec) return ; - /* The 1000 here is a hack. audiobuffer_get_latency() should + /* The 1000 here is a hack. pcmbuf_get_latency() should * be more accurate */ - latency = (audiobuffer_get_latency() + 1000) * cur_ti->id3.bitrate / 8; + latency = (pcmbuf_get_latency() + 1000) * cur_ti->id3.bitrate / 8; if (value < latency) { cur_ti->id3.offset = 0; @@ -487,7 +404,7 @@ static bool rebuffer_and_seek(int newpos) ci.curpos = newpos; cur_ti->available = 0; lseek(current_fd, newpos, SEEK_SET); - pcm_flush_audio(); + pcmbuf_flush_audio(); mutex_unlock(&mutex_bufferfill); @@ -553,8 +470,8 @@ bool codec_seek_buffer_callback(off_t newpos) if (difference >= 0) { logf("seek: +%d", difference); codec_advance_buffer_callback(difference); - if (!pcm_is_crossfade_active()) - pcm_play_stop(); + if (!pcmbuf_is_crossfade_active()) + pcmbuf_play_stop(); return true; } @@ -575,8 +492,8 @@ bool codec_seek_buffer_callback(off_t newpos) if (buf_ridx < 0) buf_ridx = codecbuflen + buf_ridx; ci.curpos -= difference; - if (!pcm_is_crossfade_active()) - pcm_play_stop(); + if (!pcmbuf_is_crossfade_active()) + pcmbuf_play_stop(); return true; } @@ -598,9 +515,9 @@ void codec_configure_callback(int setting, void *value) case CODEC_DSP_ENABLE: if ((bool)value) - ci.audiobuffer_insert = codec_audiobuffer_insert_callback; + ci.pcmbuf_insert = codec_pcmbuf_insert_callback; else - ci.audiobuffer_insert = pcm_insert_buffer; + ci.pcmbuf_insert = pcmbuf_insert_buffer; break ; default: @@ -640,7 +557,7 @@ void yield_codecs(void) yield(); if (!pcm_is_playing()) sleep(5); - while ((pcm_is_crossfade_active() || pcm_is_lowdata()) + while ((pcmbuf_is_crossfade_active() || pcmbuf_is_lowdata()) && !ci.stop_codec && playing && queue_empty(&audio_queue) && codecbufused > (128*1024)) yield(); @@ -1067,7 +984,7 @@ void audio_play_start(int offset) buf_ridx = 0; buf_widx = 0; codecbufused = 0; - pcm_set_boost_mode(true); + pcmbuf_set_boost_mode(true); fill_bytesleft = codecbuflen; filling = true; @@ -1082,7 +999,7 @@ void audio_play_start(int offset) logf("Failure"); } - pcm_set_boost_mode(false); + pcmbuf_set_boost_mode(false); } void audio_clear_track_entries(void) @@ -1162,7 +1079,7 @@ void initialize_buffer_fill(void) fill_bytesleft = codecbuflen - codecbufused; cur_ti->start_pos = ci.curpos; - pcm_set_boost_mode(true); + pcmbuf_set_boost_mode(true); if (filling) return ; @@ -1222,10 +1139,12 @@ void audio_check_buffer(void) generate_postbuffer_events(); filling = false; conf_bufferlimit = 0; - pcm_set_boost_mode(false); - + pcmbuf_set_boost_mode(false); + +#ifndef SIMULATOR if (playing) ata_sleep(); +#endif } } @@ -1242,7 +1161,7 @@ void audio_update_trackinfo(void) buf_ridx -= codecbuflen; if (!filling) - pcm_set_boost_mode(false); + pcmbuf_set_boost_mode(false); } else { buf_ridx -= ci.curpos + cur_ti->codecsize; codecbufused += ci.curpos + cur_ti->codecsize; @@ -1263,8 +1182,8 @@ void audio_update_trackinfo(void) ci.curpos = 0; cur_ti->start_pos = 0; ci.taginfo_ready = (bool *)&cur_ti->taginfo_ready; - if (!pcm_crossfade_init()) - audiobuffer_add_event(codec_track_changed); + if (!pcmbuf_crossfade_init()) + pcmbuf_add_event(codec_track_changed); else codec_track_changed(); } @@ -1278,7 +1197,7 @@ static void audio_stop_playback(void) close(current_fd); current_fd = -1; } - pcm_play_stop(); + pcmbuf_play_stop(); pcm_play_pause(true); track_count = 0; audio_clear_track_entries(); @@ -1448,8 +1367,8 @@ static void initiate_track_change(int peek_index) queue_post(&audio_queue, AUDIO_PLAY, 0); } - else if (!pcm_crossfade_init()) - pcm_flush_audio(); + else if (!pcmbuf_crossfade_init()) + pcmbuf_flush_audio(); codec_track_changed(); } @@ -1473,8 +1392,8 @@ void audio_thread(void) ci.stop_codec = true; ci.reload_codec = false; ci.seek_time = 0; - if (!pcm_crossfade_init() && !pcm_is_crossfade_active()) - pcm_flush_audio(); + if (!pcmbuf_crossfade_init() && !pcmbuf_is_crossfade_active()) + pcmbuf_flush_audio(); audio_play_start((int)ev.data); playlist_update_resume_info(audio_current_track()); break ; @@ -1650,8 +1569,8 @@ void audio_play(int offset) { logf("audio_play"); ci.stop_codec = true; - if (!pcm_crossfade_init()) - pcm_flush_audio(); + if (!pcmbuf_crossfade_init()) + pcmbuf_flush_audio(); codec_track_changed(); pcm_play_pause(true); @@ -1696,7 +1615,7 @@ void audio_ff_rewind(int newpos) logf("rewind: %d", newpos); if (playing) { ci.seek_time = newpos+1; - pcm_play_stop(); + pcmbuf_play_stop(); paused = false; } } @@ -1905,8 +1824,8 @@ void audio_init(void) /* Initialize codec api. */ ci.read_filebuf = codec_filebuf_callback; - ci.audiobuffer_insert = pcm_insert_buffer; - ci.audiobuffer_insert_split = codec_audiobuffer_insert_split_callback; + ci.pcmbuf_insert = pcmbuf_insert_buffer; + ci.pcmbuf_insert_split = codec_pcmbuf_insert_split_callback; ci.get_codec_memory = get_codec_memory_callback; ci.request_buffer = codec_request_buffer_callback; ci.advance_buffer = codec_advance_buffer_callback; diff --git a/apps/plugin.h b/apps/plugin.h index 7dff074d92..b081887328 100644 --- a/apps/plugin.h +++ b/apps/plugin.h @@ -303,8 +303,7 @@ struct plugin_api { void (*bitswap)(unsigned char *data, int length); #endif #if CONFIG_HWCODEC == MASNONE - void (*pcm_play_data)(const unsigned char *start, int size, - void (*get_more)(unsigned char** start, long*size)); + void (*pcm_play_data)(void (*get_more)(unsigned char** start, long*size)); void (*pcm_play_stop)(void); void (*pcm_set_frequency)(unsigned int frequency); bool (*pcm_is_playing)(void); diff --git a/apps/settings.c b/apps/settings.c index 50a309d8da..940c0d8bbe 100644 --- a/apps/settings.c +++ b/apps/settings.c @@ -73,6 +73,7 @@ struct user_settings global_settings; const char rec_base_directory[] = REC_BASE_DIR; #endif #if CONFIG_HWCODEC == MASNONE +#include "pcmbuf.h" #include "pcm_playback.h" #endif @@ -845,7 +846,7 @@ void settings_apply(void) } #if CONFIG_HWCODEC == MASNONE && !defined(SIMULATOR) - pcm_crossfade_enable(global_settings.crossfade); + pcmbuf_crossfade_enable(global_settings.crossfade); #endif #ifdef HAVE_SPDIF_POWER diff --git a/apps/settings_menu.c b/apps/settings_menu.c index 5927635d0e..90ad191d1c 100644 --- a/apps/settings_menu.c +++ b/apps/settings_menu.c @@ -64,6 +64,7 @@ void dac_line_in(bool enable); #endif #if CONFIG_HWCODEC == MASNONE +#include "pcmbuf.h" #include "pcm_playback.h" #endif @@ -1107,7 +1108,7 @@ static bool crossfade(void) { bool rc = set_bool( str(LANG_CROSSFADE), &global_settings.crossfade ); #ifndef SIMULATOR - pcm_crossfade_enable(global_settings.crossfade); + pcmbuf_crossfade_enable(global_settings.crossfade); #endif return rc; } diff --git a/firmware/export/pcm_playback.h b/firmware/export/pcm_playback.h index c29cd2a03e..3f0b5eee86 100644 --- a/firmware/export/pcm_playback.h +++ b/firmware/export/pcm_playback.h @@ -19,41 +19,15 @@ #ifndef PCM_PLAYBACK_H #define PCM_PLAYBACK_H -/* Guard buffer for crossfader when dsp is enabled. */ -#define PCMBUF_GUARD 32768 - -/* PCM audio buffer. */ -#define PCMBUF_SIZE (1*1024*1024) - void pcm_init(void); void pcm_set_frequency(unsigned int frequency); /* This is for playing "raw" PCM data */ -void pcm_play_data(const unsigned char* start, int size, - void (*get_more)(unsigned char** start, long* size)); +void pcm_play_data(void (*get_more)(unsigned char** start, long* size)); void pcm_play_stop(void); void pcm_play_pause(bool play); +bool pcm_is_paused(void); bool pcm_is_playing(void); -bool pcm_is_crossfade_active(void); - -/* These functions are for playing chained buffers of PCM data */ -void pcm_play_init(void); -void pcm_play_start(void); -bool pcm_play_add_chunk(void *addr, int size, void (*callback)(void)); -int pcm_play_num_used_buffers(void); -void pcm_play_set_watermark(int numbytes, void (*callback)(int bytes_left)); - -void pcm_set_boost_mode(bool state); -bool pcm_is_lowdata(void); -void pcm_flush_audio(void); -bool pcm_crossfade_init(void); -void audiobuffer_add_event(void (*event_handler)(void)); -unsigned int audiobuffer_get_latency(void); -bool pcm_insert_buffer(char *buf, long length); -void pcm_flush_buffer(long length); -void* pcm_request_buffer(long length, long *realsize); -bool pcm_is_crossfade_enabled(void); -void pcm_crossfade_enable(bool on_off); #endif diff --git a/firmware/pcm_playback.c b/firmware/pcm_playback.c index af8ce18af4..7682ce03c8 100644 --- a/firmware/pcm_playback.c +++ b/firmware/pcm_playback.c @@ -43,61 +43,13 @@ #ifdef HAVE_UDA1380 -#define CHUNK_SIZE 32768 -/* Must be a power of 2 */ -#define NUM_PCM_BUFFERS (PCMBUF_SIZE / CHUNK_SIZE) -#define NUM_PCM_BUFFERS_MASK (NUM_PCM_BUFFERS - 1) -#define PCM_WATERMARK (CHUNK_SIZE * 10) -#define PCM_CF_WATERMARK (PCMBUF_SIZE - CHUNK_SIZE*8) - static bool pcm_playing; static bool pcm_paused; static int pcm_freq = 0x6; /* 44.1 is default */ -static char *audiobuffer; -static long audiobuffer_pos; -long audiobuffer_free; -static long audiobuffer_fillpos; -static bool boost_mode; - -/* Crossfade modes. If CFM_CROSSFADE is selected, normal - * crossfader will activate. Selecting CFM_FLUSH is a special - * operation that only overwrites the pcm buffer without crossfading. - */ -enum { - CFM_CROSSFADE, - CFM_FLUSH -}; - -static int crossfade_mode; -static bool crossfade_enabled; -static bool crossfade_active; -static bool crossfade_init; -static int crossfade_pos; -static int crossfade_amount; -static int crossfade_rem; - -static char *guardbuf; -static void (*pcm_event_handler)(void); - static unsigned char *next_start; static long next_size; -static int last_chunksize = 0; - -struct pcmbufdesc -{ - void *addr; - int size; - void (*callback)(void); /* Call this when the buffer has been played */ -} pcmbuffers[NUM_PCM_BUFFERS]; - -volatile int pcmbuf_read_index; -volatile int pcmbuf_write_index; -int pcmbuf_unplayed_bytes; -int pcmbuf_watermark; -void (*pcmbuf_watermark_callback)(int bytes_left); - /* Set up the DMA transfer that kicks in when the audio FIFO gets empty */ static void dma_start(const void *addr, long size) { @@ -122,21 +74,6 @@ static void dma_start(const void *addr, long size) DCR0 = DMA_INT | DMA_EEXT | DMA_CS | DMA_SINC | DMA_START; } -void pcm_boost(bool state) -{ - static bool boost_state = false; - - if (crossfade_init || crossfade_active || boost_mode) - return ; - - if (state != boost_state) { -#ifdef HAVE_ADJUSTABLE_CPU_FREQ - cpu_boost(state); -#endif - boost_state = state; - } -} - /* Stops the DMA transfer and interrupt */ static void dma_stop(void) { @@ -147,17 +84,8 @@ static void dma_stop(void) IIS2CONFIG = 0x800; EBU1CONFIG = 0x800; - pcmbuf_unplayed_bytes = 0; - last_chunksize = 0; - audiobuffer_pos = 0; - audiobuffer_fillpos = 0; - audiobuffer_free = PCMBUF_SIZE; - pcmbuf_read_index = 0; - pcmbuf_write_index = 0; next_start = NULL; next_size = 0; - crossfade_init = 0; - crossfade_active = 0; pcm_paused = false; } @@ -185,67 +113,13 @@ void pcm_set_frequency(unsigned int frequency) /* the registered callback function to ask for more mp3 data */ static void (*callback_for_more)(unsigned char**, long*) = NULL; -int pcm_play_num_used_buffers(void) +void pcm_play_data(void (*get_more)(unsigned char** start, long* size)) { - return (pcmbuf_write_index - pcmbuf_read_index) & NUM_PCM_BUFFERS_MASK; -} - -static void pcm_play_callback(unsigned char** start, long* size) -{ - struct pcmbufdesc *desc = &pcmbuffers[pcmbuf_read_index]; - int sz; - - pcmbuf_unplayed_bytes -= last_chunksize; - audiobuffer_free += last_chunksize; + unsigned char *start; + long size; - - if(desc->size == 0) - { - /* The buffer is finished, call the callback function */ - if(desc->callback) - desc->callback(); - - /* Advance to the next buffer */ - pcmbuf_read_index = (pcmbuf_read_index + 1) & NUM_PCM_BUFFERS_MASK; - desc = &pcmbuffers[pcmbuf_read_index]; - } - - if(pcm_play_num_used_buffers()) - { - /* Play max 64K at a time */ - //sz = MIN(desc->size, 32768); - sz = desc->size; - *start = desc->addr; - *size = sz; - - /* Update the buffer descriptor */ - desc->size -= sz; - desc->addr += sz; - - last_chunksize = sz; - } - else - { - /* No more buffers */ - *size = 0; - if (pcm_event_handler) - pcm_event_handler(); - } -#if 1 - if(pcmbuf_unplayed_bytes <= pcmbuf_watermark) - { - if(pcmbuf_watermark_callback) - { - pcmbuf_watermark_callback(pcmbuf_unplayed_bytes); - } - } -#endif -} - -void pcm_play_data(const unsigned char* start, int size, - void (*get_more)(unsigned char** start, long* size)) -{ callback_for_more = get_more; + /** FIXME: This is a temporary fix to prevent playback glitches when * playing the first file. We will just drop the first frame to prevent * that problem from occurring. @@ -259,6 +133,7 @@ void pcm_play_data(const unsigned char* start, int size, * find the explanation for this bug from this file. */ get_more((unsigned char **)&start, (long *)&size); // REMOVE THIS TO TEST + get_more((unsigned char **)&start, (long *)&size); get_more(&next_start, &next_size); dma_start(start, size); uda1380_mute(false); @@ -270,13 +145,11 @@ void pcm_play_stop(void) uda1380_mute(true); dma_stop(); } - pcm_set_boost_mode(false); - pcm_boost(false); } void pcm_play_pause(bool play) { - if(pcm_paused && play && pcmbuf_unplayed_bytes) + if(pcm_paused && play && next_size) { logf("unpause"); /* Reset chunk size so dma has enough data to fill the fifo. */ @@ -303,6 +176,11 @@ void pcm_play_pause(bool play) pcm_paused = !play; } +bool pcm_is_paused(void) +{ + return pcm_paused; +} + bool pcm_is_playing(void) { return pcm_playing; @@ -370,390 +248,8 @@ void pcm_init(void) sleep(HZ/4); uda1380_enable_output(true); - pcm_play_init(); -} - -void pcm_play_set_watermark(int numbytes, void (*callback)(int bytes_left)) -{ - pcmbuf_watermark = numbytes; - pcmbuf_watermark_callback = callback; -} - -bool pcm_play_add_chunk(void *addr, int size, void (*callback)(void)) -{ - /* We don't use the last buffer, since we can't see the difference - between the full and empty condition */ - if(pcm_play_num_used_buffers() < (NUM_PCM_BUFFERS - 2)) - { - pcmbuffers[pcmbuf_write_index].addr = addr; - pcmbuffers[pcmbuf_write_index].size = size; - pcmbuffers[pcmbuf_write_index].callback = callback; - pcmbuf_write_index = (pcmbuf_write_index+1) & NUM_PCM_BUFFERS_MASK; - pcmbuf_unplayed_bytes += size; - return true; - } - else - return false; -} - -void pcm_watermark_callback(int bytes_left) -{ - /* Fill audio buffer by boosting cpu */ - pcm_boost(true); - if (bytes_left <= CHUNK_SIZE * 2) - crossfade_active = false; -} - -void pcm_set_boost_mode(bool state) -{ - if (state) - pcm_boost(true); - boost_mode = state; -} - -void audiobuffer_add_event(void (*event_handler)(void)) -{ - pcm_event_handler = event_handler; -} - -unsigned int audiobuffer_get_latency(void) -{ - int latency; - - /* This has to be done better. */ - latency = (PCMBUF_SIZE - audiobuffer_free - CHUNK_SIZE)/4 / (44100/1000); - if (latency < 0) - latency = 0; - - return latency; -} - -bool pcm_is_lowdata(void) -{ - if (!pcm_is_playing() || pcm_paused || crossfade_init || crossfade_active) - return false; - - if (pcmbuf_unplayed_bytes < PCM_WATERMARK) - return true; - - return false; -} - -bool pcm_crossfade_init(void) -{ - if (PCMBUF_SIZE - audiobuffer_free < CHUNK_SIZE * 8 || !crossfade_enabled - || crossfade_active || crossfade_init) { - return false; - } - logf("pcm_crossfade_init"); - pcm_boost(true); - crossfade_mode = CFM_CROSSFADE; - crossfade_init = true; - - return true; - -} - -/** Initialize a track switch so that audio playback will not stop but - * the switch to next track would happen as soon as possible. - */ -void pcm_flush_audio(void) -{ - if (crossfade_init || crossfade_active || !pcm_playing) { - pcm_play_stop(); - return ; - } - - crossfade_mode = CFM_FLUSH; - crossfade_init = true; -} - -void pcm_flush_fillpos(void) -{ - int copy_n; - - copy_n = MIN(audiobuffer_fillpos, CHUNK_SIZE); - - if (copy_n) { - while (!pcm_play_add_chunk(&audiobuffer[audiobuffer_pos], - copy_n, pcm_event_handler)) { - pcm_boost(false); - sleep(1); - /* This is a fatal error situation that should never happen. */ - if (!pcm_playing) { - logf("pcm_flush_fillpos error"); - break ; - } - } - pcm_event_handler = NULL; - audiobuffer_pos += copy_n; - if (audiobuffer_pos >= PCMBUF_SIZE) - audiobuffer_pos -= PCMBUF_SIZE; - audiobuffer_free -= copy_n; - audiobuffer_fillpos -= copy_n; - } -} - -static void crossfade_start(void) -{ - int bytesleft = pcmbuf_unplayed_bytes; - - crossfade_init = 0; - if (bytesleft < CHUNK_SIZE * 3) { - logf("crossfade rejected"); - pcm_play_stop(); - return ; - } - - logf("crossfade_start"); - pcm_flush_fillpos(); - pcm_boost(true); - crossfade_active = true; - crossfade_pos = audiobuffer_pos; - - switch (crossfade_mode) { - case CFM_CROSSFADE: - crossfade_amount = (bytesleft - (CHUNK_SIZE * 2))/2; - crossfade_rem = crossfade_amount; - break ; - - case CFM_FLUSH: - crossfade_amount = (bytesleft - (CHUNK_SIZE * 2))/2; - crossfade_rem = crossfade_amount; - break ; - } - - crossfade_pos -= crossfade_amount*2; - if (crossfade_pos < 0) - crossfade_pos += PCMBUF_SIZE; -} - -static __inline -int crossfade(short *buf, const short *buf2, int length) -{ - int size, i; - int val1, val2; - - size = MIN(length, crossfade_rem); - switch (crossfade_mode) { - case CFM_CROSSFADE: - val1 = (crossfade_rem<<10)/crossfade_amount; - val2 = ((crossfade_amount-crossfade_rem)<<10)/crossfade_amount; - - for (i = 0; i < size; i++) { - buf[i] = ((buf[i] * val1) + (buf2[i] * val2)) >> 10; - } - break ; - - case CFM_FLUSH: - for (i = 0; i < size; i++) { - buf[i] = buf2[i]; - } - //memcpy((char *)buf, (char *)buf2, size*2); - break ; - } - - crossfade_rem -= size; - if (crossfade_rem <= 0) - crossfade_active = false; - - return size; -} - -static bool prepare_insert(long length) -{ - if (crossfade_init) - crossfade_start(); - - if (audiobuffer_free < length + audiobuffer_fillpos - + CHUNK_SIZE && !crossfade_active) { - pcm_boost(false); - return false; - } - - if (!pcm_is_playing()) { - pcm_boost(true); - crossfade_active = false; - if (audiobuffer_free < PCMBUF_SIZE - CHUNK_SIZE*4) - pcm_play_start(); - } - - return true; -} - -void* pcm_request_buffer(long length, long *realsize) -{ - void *ptr = NULL; - - while (audiobuffer_free < length + audiobuffer_fillpos - + CHUNK_SIZE && !crossfade_active) { - pcm_boost(false); - sleep(1); - } - - if (crossfade_active) { - *realsize = MIN(length, PCMBUF_GUARD); - ptr = &guardbuf[0]; - } else { - *realsize = MIN(length, PCMBUF_SIZE - audiobuffer_pos - - audiobuffer_fillpos); - if (*realsize < length) { - *realsize += MIN((long)(length - *realsize), PCMBUF_GUARD); - } - ptr = &audiobuffer[audiobuffer_pos + audiobuffer_fillpos]; - } - - return ptr; -} - -bool pcm_is_crossfade_active(void) -{ - return crossfade_active || crossfade_init; -} - -void pcm_flush_buffer(long length) -{ - int copy_n; - char *buf; - - prepare_insert(length); - - if (crossfade_active) { - buf = &guardbuf[0]; - length = MIN(length, PCMBUF_GUARD); - while (length > 0 && crossfade_active) { - copy_n = MIN(length, PCMBUF_SIZE - crossfade_pos); - copy_n = 2 * crossfade((short *)&audiobuffer[crossfade_pos], - (const short *)buf, copy_n/2); - buf += copy_n; - length -= copy_n; - crossfade_pos += copy_n; - if (crossfade_pos >= PCMBUF_SIZE) - crossfade_pos -= PCMBUF_SIZE; - } - - while (length > 0) { - copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos); - memcpy(&audiobuffer[audiobuffer_pos], buf, copy_n); - audiobuffer_fillpos = copy_n; - buf += copy_n; - length -= copy_n; - if (length > 0) - pcm_flush_fillpos(); - } - } - - audiobuffer_fillpos += length; - - try_flush: - if (audiobuffer_fillpos < CHUNK_SIZE && PCMBUF_SIZE - - audiobuffer_pos - audiobuffer_fillpos > 0) - return ; - - copy_n = audiobuffer_fillpos - (PCMBUF_SIZE - audiobuffer_pos); - if (copy_n > 0) { - audiobuffer_fillpos -= copy_n; - pcm_flush_fillpos(); - copy_n = MIN(copy_n, PCMBUF_GUARD); - memcpy(&audiobuffer[0], &guardbuf[0], copy_n); - audiobuffer_fillpos = copy_n; - goto try_flush; - } - pcm_flush_fillpos(); -} - -bool pcm_insert_buffer(char *buf, long length) -{ - long copy_n = 0; - - if (!prepare_insert(length)) - return false; - - - if (crossfade_active) { - while (length > 0 && crossfade_active) { - copy_n = MIN(length, PCMBUF_SIZE - crossfade_pos); - - copy_n = 2 * crossfade((short *)&audiobuffer[crossfade_pos], - (const short *)buf, copy_n/2); - buf += copy_n; - length -= copy_n; - crossfade_pos += copy_n; - if (crossfade_pos >= PCMBUF_SIZE) - crossfade_pos -= PCMBUF_SIZE; - } - - while (length > 0) { - copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos); - memcpy(&audiobuffer[audiobuffer_pos], buf, copy_n); - audiobuffer_fillpos = copy_n; - buf += copy_n; - length -= copy_n; - if (length > 0) - pcm_flush_fillpos(); - } - } - - while (length > 0) { - copy_n = MIN(length, PCMBUF_SIZE - audiobuffer_pos - - audiobuffer_fillpos); - copy_n = MIN(CHUNK_SIZE - audiobuffer_fillpos, copy_n); - - memcpy(&audiobuffer[audiobuffer_pos+audiobuffer_fillpos], - buf, copy_n); - buf += copy_n; - audiobuffer_fillpos += copy_n; - length -= copy_n; - - /* Pre-buffer to meet CHUNK_SIZE requirement */ - if (audiobuffer_fillpos < CHUNK_SIZE && length == 0) { - return true; - } - - pcm_flush_fillpos(); - } - - return true; -} - -void pcm_play_init(void) -{ - audiobuffer = &audiobuf[(audiobufend - audiobuf) - - PCMBUF_SIZE - PCMBUF_GUARD]; - guardbuf = &audiobuffer[PCMBUF_SIZE]; - /* Call dma_stop to initialize everything. */ dma_stop(); - pcm_event_handler = NULL; -} - -void pcm_crossfade_enable(bool on_off) -{ - crossfade_enabled = on_off; -} - -bool pcm_is_crossfade_enabled(void) -{ - return crossfade_enabled; -} - -void pcm_play_start(void) -{ - unsigned long size; - unsigned char *start; - - if (crossfade_enabled) { - pcm_play_set_watermark(PCM_CF_WATERMARK, pcm_watermark_callback); - } else { - pcm_play_set_watermark(PCM_WATERMARK, pcm_watermark_callback); - } - crossfade_active = false; - - if(!pcm_is_playing()) - { - pcm_play_callback(&start, &size); - pcm_play_data(start, size, pcm_play_callback); - } } #endif /* HAVE_UDA1380 */ diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c index 3b61e2781c..5865b2c223 100644 --- a/uisimulator/common/stubs.c +++ b/uisimulator/common/stubs.c @@ -33,7 +33,36 @@ extern char having_new_lcd; +/* Stubs for PCM audio playback. */ +bool pcm_is_playing(void) +{ + return false; +} +void pcm_play_pause(bool state) +{ + (void)state; +} + +bool pcm_is_paused(void) +{ + return false; +} + +void pcm_play_stop(void) +{ +} + +void pcm_init(void) +{ +} + +void pcm_play_data(void (*get_more)(unsigned char** start, long* size)) +{ + (void)get_more; +} + +/* Generic firmware stubs. */ void backlight_on(void) { /* we could do something better here! */