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player.cpp
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player.cpp
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/* Audio file player library for Zynthian
Copyright (C) 2021-2024 Brian Walton <brian@riban.co.uk>
License: LGPL V3
Envelope generator based on code by EarLevel Engineering <https://www.earlevel.com/main/2013/06/03/envelope-generators-adsr-code/>
*/
#include "player.h"
#include <stdio.h> // provides printf
#include <jack/jack.h> // provides interface to JACK
#include <jack/midiport.h> // provides JACK MIDI interface
#include <pthread.h> // provides multithreading
#include <unistd.h> // provides usleep
#include <stdlib.h> // provides exit
#include <arpa/inet.h> // provides inet_pton
#include <fcntl.h> // provides fcntl
#include <math.h> // provides pow, log, fabs, isinf
#include <string> // provides std:string
#include <cstring> // provides strcmp, memset
#include <vector>
#include <algorithm> // provides find
using namespace RubberBand;
using namespace std;
// **** Global variables ****
vector<AUDIO_PLAYER*> g_vPlayers;
jack_client_t* g_jack_client;
jack_port_t* g_jack_midi_in;
jack_nframes_t g_samplerate = 44100; // Playback samplerate set by jackd
uint8_t g_debug = 0;
uint8_t g_last_debug = 0;
char g_supported_codecs[1024];
uint8_t g_mutex = 0;
uint32_t g_nextIndex = 1;
float g_tempo = 2.0; // Tempo in beats per second
// Declare local functions
void set_env_gate(AUDIO_PLAYER * pPlayer, uint8_t gate);
void reset_env(AUDIO_PLAYER * pPlayer);
float process_env(AUDIO_PLAYER * pPlayer);
#define DPRINTF(fmt, args...) if(g_debug) fprintf(stderr, fmt, ## args)
// **** Internal (non-public) functions ****
void getMutex() {
while(g_mutex)
usleep(10);
g_mutex = 1;
}
void releaseMutex() {
g_mutex = 0;
}
int is_codec_supported(const char* codec) {
SF_FORMAT_INFO format_info ;
int k, count ;
sf_command (NULL, SFC_GET_SIMPLE_FORMAT_COUNT, &count, sizeof (int));
for (k = 0 ; k < count ; k++) {
format_info.format = k;
sf_command (NULL, SFC_GET_SIMPLE_FORMAT, &format_info, sizeof (format_info));
if(strcmp(codec, format_info.extension) == 0)
return 1;
}
return 0;
}
void updateTempo(AUDIO_PLAYER * pPlayer) {
getMutex();
if (!pPlayer)
return;
if(pPlayer->beats) {
float div = g_tempo * (pPlayer->crop_end_src - pPlayer->crop_start_src);
if (div > 0.0)
pPlayer->time_ratio = g_samplerate * pPlayer->beats / div;
} else {
pPlayer->time_ratio = 1.0;
}
pPlayer->time_ratio_dirty = true;
releaseMutex();
}
char* get_supported_codecs() {
g_supported_codecs[0] = '\0';
SF_FORMAT_INFO format_info ;
int k, count ;
sf_command (NULL, SFC_GET_SIMPLE_FORMAT_COUNT, &count, sizeof (int));
for (k = 0 ; k < count ; k++) {
format_info.format = k;
sf_command (NULL, SFC_GET_SIMPLE_FORMAT, &format_info, sizeof (format_info));
if(strstr(g_supported_codecs, format_info.extension))
continue;
if(g_supported_codecs[0])
strcat(g_supported_codecs, ",");
strcat(g_supported_codecs, format_info.extension);
}
return g_supported_codecs;
}
void send_notifications(AUDIO_PLAYER * pPlayer, int param) {
// Send dynamic notifications within this thread, not jack process
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return;
if((param == NOTIFY_ALL || param == NOTIFY_TRANSPORT) && pPlayer->last_play_state != pPlayer->play_state) {
pPlayer->last_play_state = pPlayer->play_state;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_TRANSPORT, (float)(pPlayer->play_state));
}
if((param == NOTIFY_ALL || param == NOTIFY_POSITION) && fabs(get_position(pPlayer) - pPlayer->last_position) >= pPlayer->pos_notify_delta) {
pPlayer->last_position = get_position(pPlayer);
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_POSITION, pPlayer->last_position);
}
if((param == NOTIFY_ALL || param == NOTIFY_GAIN) && fabs(pPlayer->gain - pPlayer->last_gain) >= 0.01) {
pPlayer->last_gain = pPlayer->gain;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_GAIN, (float)(pPlayer->gain));
}
if((param == NOTIFY_ALL || param == NOTIFY_LOOP) && pPlayer->loop != pPlayer->last_loop) {
pPlayer->last_loop = pPlayer->loop;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_LOOP, (float)(pPlayer->loop));
}
if((param == NOTIFY_ALL || param == NOTIFY_LOOP_START) && pPlayer->loop_start != pPlayer->last_loop_start) {
pPlayer->last_loop_start = pPlayer->loop_start;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_LOOP_START, get_loop_start_time(pPlayer));
}
if((param == NOTIFY_ALL || param == NOTIFY_LOOP_END) && pPlayer->loop_end != pPlayer->last_loop_end) {
pPlayer->last_loop_end = pPlayer->loop_end;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_LOOP_END, get_loop_end_time(pPlayer));
}
if((param == NOTIFY_ALL || param == NOTIFY_CROP_START) && pPlayer->crop_start != pPlayer->last_crop_start) {
pPlayer->last_crop_start = pPlayer->crop_start;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_CROP_START, get_crop_start_time(pPlayer));
}
if((param == NOTIFY_ALL || param == NOTIFY_CROP_END) && pPlayer->crop_end != pPlayer->last_crop_end) {
pPlayer->last_crop_end = pPlayer->crop_end;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_CROP_END, get_crop_end_time(pPlayer));
}
if((param == NOTIFY_ALL || param == NOTIFY_SUSTAIN) && pPlayer->sustain != pPlayer->last_sustain) {
pPlayer->last_sustain = pPlayer->sustain;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_SUSTAIN, pPlayer->sustain);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_ATTACK) && pPlayer->env_attack_rate != pPlayer->last_env_attack_rate) {
pPlayer->last_env_attack_rate = pPlayer->env_attack_rate;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_ATTACK, pPlayer->env_attack_rate);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_HOLD) && pPlayer->env_hold != pPlayer->last_env_hold) {
pPlayer->last_env_hold = pPlayer->env_hold;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_HOLD, float(pPlayer->env_hold) / g_samplerate);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_DECAY) && pPlayer->env_decay_rate != pPlayer->last_env_decay_rate) {
pPlayer->last_env_decay_rate = pPlayer->env_decay_rate;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_DECAY, pPlayer->env_decay_rate);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_SUSTAIN) && pPlayer->env_sustain_level != pPlayer->last_env_sustain_level) {
pPlayer->last_env_sustain_level = pPlayer->env_sustain_level;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_SUSTAIN, pPlayer->env_sustain_level);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_RELEASE) && pPlayer->env_release_rate != pPlayer->last_env_release_rate) {
pPlayer->last_env_release_rate = pPlayer->env_release_rate;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_RELEASE, pPlayer->env_release_rate);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_ATTACK_CURVE) && pPlayer->env_target_ratio_a != pPlayer->last_env_target_ratio_a) {
pPlayer->last_env_target_ratio_a = pPlayer->env_target_ratio_a;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_ATTACK_CURVE, pPlayer->env_target_ratio_a);
}
if((param == NOTIFY_ALL || param == NOTIFY_ENV_DECAY_CURVE) && pPlayer->env_target_ratio_dr != pPlayer->last_env_target_ratio_dr) {
pPlayer->last_env_target_ratio_dr = pPlayer->env_target_ratio_dr;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_ENV_DECAY_CURVE, pPlayer->env_target_ratio_dr);
}
if((param == NOTIFY_ALL || param == NOTIFY_TRACK_A) && pPlayer->track_a != pPlayer->last_track_a) {
pPlayer->last_track_a = pPlayer->track_a;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_TRACK_A, (float)(pPlayer->track_a));
}
if((param == NOTIFY_ALL || param == NOTIFY_TRACK_B) && pPlayer->track_b != pPlayer->last_track_b) {
pPlayer->last_track_b = pPlayer->track_b;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_TRACK_B, (float)(pPlayer->track_b));
}
if((param == NOTIFY_ALL || param == NOTIFY_QUALITY) && pPlayer->src_quality != pPlayer->last_src_quality) {
pPlayer->last_src_quality = pPlayer->src_quality;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_QUALITY, (float)(pPlayer->src_quality));
}
if((param == NOTIFY_ALL || param == NOTIFY_VARISPEED) && pPlayer->varispeed != pPlayer->last_varispeed) {
pPlayer->last_varispeed = pPlayer->varispeed;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_VARISPEED, (float)(pPlayer->varispeed));
}
if((param == NOTIFY_ALL || param == NOTIFY_DEBUG) && g_debug != g_last_debug) {
g_last_debug = g_debug;
if(pPlayer->cb_fn)
((cb_fn_t*)pPlayer->cb_fn)(pPlayer, NOTIFY_DEBUG, (float)(g_debug));
}
}
void* file_thread_fn(void * param) {
AUDIO_PLAYER * pPlayer = (AUDIO_PLAYER *) (param);
pPlayer->sf_info.format = 0; // This triggers sf_open to populate info structure
SRC_STATE* pSrcState = NULL;
SRC_DATA srcData;
size_t nMaxFrames; // Maximum quantity of frames that may be read from file
size_t nUnusedFrames = 0; // Quantity of frames in input buffer not used by SRC
SNDFILE* pFile = sf_open(pPlayer->filename.c_str(), SFM_READ, &pPlayer->sf_info);
if(!pFile || pPlayer->sf_info.channels < 1) {
pPlayer->file_open = FILE_CLOSED;
fprintf(stderr, "libaudioplayer error: failed to open file %s: %s\n", pPlayer->filename.c_str(), sf_strerror(pFile));
}
if(pPlayer->sf_info.channels < 0) {
pPlayer->file_open = FILE_CLOSED;
fprintf(stderr, "libaudioplayer error: file %s has no tracks\n", pPlayer->filename.c_str());
int nError = sf_close(pFile);
if(nError != 0)
fprintf(stderr, "libaudioplayer error: failed to close file with error code %d\n", nError);
}
if(pPlayer->file_open) {
pPlayer->stretcher = new RubberBandStretcher(g_samplerate, 2,
RubberBandStretcher::OptionProcessRealTime
| RubberBandStretcher::OptionWindowShort
| RubberBandStretcher::OptionPitchHighConsistency
| RubberBandStretcher::OptionFormantPreserved);
pPlayer->stretcher->setMaxProcessSize(256);
pPlayer->loop_start = 0;
pPlayer->loop_end = pPlayer->sf_info.frames;
pPlayer->crop_start = 0;
pPlayer->crop_end = pPlayer->sf_info.frames;
pPlayer->file_read_status = SEEKING;
pPlayer->src_ratio = (float)g_samplerate / pPlayer->sf_info.samplerate;
if(pPlayer->src_ratio < 0.1)
pPlayer->src_ratio = 1;
srcData.src_ratio = pPlayer->src_ratio;
pPlayer->pos_notify_delta = pPlayer->sf_info.frames / g_samplerate / 400;
pPlayer->output_buffer_size = pPlayer->src_ratio * pPlayer->input_buffer_size;
pPlayer->ringbuffer_a = jack_ringbuffer_create(pPlayer->output_buffer_size * pPlayer->buffer_count * sizeof(float));
jack_ringbuffer_mlock(pPlayer->ringbuffer_a);
pPlayer->ringbuffer_b = jack_ringbuffer_create(pPlayer->output_buffer_size * pPlayer->buffer_count * sizeof(float));
jack_ringbuffer_mlock(pPlayer->ringbuffer_b);
pPlayer->file_open = FILE_OPEN;
{
// Scope to avoid extra memory usage
const char* loopModes[] = {"None", "Forward", "Backward", "Alternating"};
SF_CUES cues ;
sf_command (pFile, SFC_GET_CUE, &cues, sizeof (cues));
for (uint32_t i = 0; i < cues.cue_count; ++i)
add_cue_point(pPlayer, float(cues.cue_points[i].sample_offset) / pPlayer->sf_info.samplerate, cues.cue_points[i].name);
SF_LOOP_INFO loopInfo;
if(sf_command(pFile, SFC_GET_LOOP_INFO, &loopInfo, sizeof(loopInfo)) == SF_TRUE) {
fprintf(stderr, "File loop info: Sig:%d/%d, %0.2fBPM, %d beats, Mode: %s, Root key: %d\n",
loopInfo.time_sig_num,
loopInfo.time_sig_den,
loopInfo.bpm,
loopInfo.num_beats,
loopModes[loopInfo.loop_mode - 800],
loopInfo.root_key);
enable_loop(pPlayer, loopInfo.loop_mode == SF_LOOP_FORWARD);
set_beats(pPlayer, loopInfo.num_beats);
} else {
enable_loop(pPlayer, true);
set_beats(pPlayer, 0);
}
SF_INSTRUMENT inst ;
if (sf_command (pFile, SFC_GET_INSTRUMENT, &inst, sizeof (inst)) == SF_TRUE) {
fprintf(stderr, "File instrument info: gain: %d, detune:%d, velocity: %d-%d, basenote: %d, detune: %d, keyrange: %d-%d\n",
inst.gain,
inst.detune,
inst.velocity_lo,
inst.velocity_hi,
inst.basenote,
inst.detune,
inst.key_lo,
inst.key_hi
);
pPlayer->gain = pow(10, (float(inst.gain) / 20));
for (int i =0; i < inst.loop_count; ++i) {
fprintf(stderr, "\tLoop %d: mode:%s, start: %d, end:%d, count:%u\n",
i,
loopModes[inst.loops[i].mode-800],
inst.loops[i].start,
inst.loops[i].end,
inst.loops[i].count
);
}
if(inst.basenote >= 0)
pPlayer->base_note = inst.basenote;
if (inst.loop_count) {
pPlayer->loop_start = inst.loops[0].start;
pPlayer->loop_start_src = pPlayer->loop_start * pPlayer->src_ratio;
pPlayer->loop_end = inst.loops[0].end;
pPlayer->loop_end_src = pPlayer->loop_end * pPlayer->src_ratio;
}
} else {
pPlayer->gain = 1.0;
pPlayer->base_note = 60;
}
}
// Initialise samplerate converter
float pBufferIn[pPlayer->input_buffer_size * pPlayer->sf_info.channels]; // Buffer used to read sample data from file
float pBufferOut[pPlayer->output_buffer_size * pPlayer->sf_info.channels]; // Buffer used to write converted sample data to
float pBufferRev[pPlayer->output_buffer_size * pPlayer->sf_info.channels]; // Buffer used to write reverse playback sample data to
srcData.data_in = pBufferIn;
srcData.data_out = pBufferOut;
srcData.output_frames = pPlayer->output_buffer_size;
pPlayer->frames = pPlayer->sf_info.frames * pPlayer->src_ratio;
pPlayer->loop_end_src = pPlayer->loop_end * pPlayer->src_ratio;
pPlayer->loop_start_src = pPlayer->loop_start * pPlayer->src_ratio;
pPlayer->crop_end_src = pPlayer->crop_end * pPlayer->src_ratio;
pPlayer->crop_start_src = pPlayer->crop_start * pPlayer->src_ratio;
int nError;
pSrcState = src_new(pPlayer->src_quality, pPlayer->sf_info.channels, &nError);
if(!pSrcState) {
fprintf(stderr, "Failed to create a samplerate converter: %d\n", nError);
pPlayer->file_open = FILE_CLOSED;
}
DPRINTF("Opened file '%s' with samplerate %u, duration: %f\n", pPlayer->filename.c_str(), pPlayer->sf_info.samplerate, get_duration(pPlayer));
while(pPlayer->file_open == FILE_OPEN) {
if(pPlayer->file_read_status == SEEKING) {
// Main thread has signalled seek within file
getMutex();
jack_ringbuffer_reset(pPlayer->ringbuffer_a);
jack_ringbuffer_reset(pPlayer->ringbuffer_b);
sf_count_t pos = sf_seek(pFile, pPlayer->play_pos_frames / pPlayer->src_ratio, SEEK_SET);
if(pos >= 0)
pPlayer->file_read_pos = pos;
//DPRINTF("Seeking to %u frames (%fs) src ratio=%f\n", nNewPos, get_position(pPlayer), srcData.src_ratio);
pPlayer->file_read_status = LOADING;
pPlayer->looped = false;
releaseMutex();
src_reset(pSrcState);
nUnusedFrames = 0;
srcData.end_of_input = 0;
pPlayer->stretcher->reset();
} else if(pPlayer->file_read_status == LOOPING) {
// Reached loop end point and need to read from loop marker
sf_count_t pos;
if(pPlayer->varispeed < 0.0)
pos = sf_seek(pFile, pPlayer->loop_end, SEEK_SET);
else
pos = sf_seek(pFile, pPlayer->loop_start, SEEK_SET);
getMutex();
if(pos >= 0)
pPlayer->file_read_pos = pos;
pPlayer->file_read_status = LOADING;
pPlayer->looped = true;
releaseMutex();
src_reset(pSrcState);
srcData.end_of_input = 0;
nUnusedFrames = 0;
}
if(pPlayer->file_read_status == WAITING)
pPlayer->file_read_status = LOADING;
while(pPlayer->file_read_status == LOADING)
{
int nFramesRead;
// Load block of data from file to SRC or output buffer
nMaxFrames = pPlayer->input_buffer_size - nUnusedFrames;
if(jack_ringbuffer_write_space(pPlayer->ringbuffer_a) >= nMaxFrames * sizeof(float) * pPlayer->src_ratio
&& jack_ringbuffer_write_space(pPlayer->ringbuffer_b) >= nMaxFrames * sizeof(float) * pPlayer->src_ratio) {
bool bReverse = (pPlayer->varispeed < 0.0);
if(bReverse) {
if(pPlayer->loop == 1) {
// Limit read to loop range
if(pPlayer->file_read_pos <= pPlayer->loop_start)
nMaxFrames = 0;
else if(pPlayer->file_read_pos - nMaxFrames < pPlayer->loop_start)
nMaxFrames = pPlayer->file_read_pos - pPlayer->loop_start;
} else if(pPlayer->file_read_pos - nMaxFrames < pPlayer->crop_start) {
// Limit read to crop range
nMaxFrames = pPlayer->file_read_pos - pPlayer->crop_start;
}
} else {
if(pPlayer->loop == 1) {
// Limit read to loop range
if(pPlayer->file_read_pos >= pPlayer->loop_end)
nMaxFrames = 0;
else if(pPlayer->file_read_pos + nMaxFrames > pPlayer->loop_end)
nMaxFrames = pPlayer->loop_end - pPlayer->file_read_pos;
} else if(pPlayer->file_read_pos + nMaxFrames > pPlayer->crop_end) {
// Limit read to crop range
nMaxFrames = pPlayer->crop_end - pPlayer->file_read_pos;
}
}
if(srcData.src_ratio == 1.0) {
// No SRC required so populate SRC output buffer directly
if(bReverse) {
if(pPlayer->file_read_pos > nMaxFrames)
pPlayer->file_read_pos -= nMaxFrames;
else {
nMaxFrames = pPlayer->file_read_pos;
pPlayer->file_read_pos = 0;
}
// Move to start of audio chunk
sf_count_t pos = sf_seek(pFile, pPlayer->file_read_pos, SEEK_SET);
if(pos >= 0) {
// Read audio chunk
nFramesRead = sf_readf_float(pFile, pBufferRev, nMaxFrames);
size_t wOffset = 0;
// Reverse audio chunk
for(int i = nFramesRead; i > 0; --i) {
for (size_t j = 0; j < pPlayer->sf_info.channels; ++j) {
pBufferOut[wOffset] = pBufferRev[(i - 1) * pPlayer->sf_info.channels + j];
++wOffset;
}
}
// Move to start of audio chunk again for next cycle (we have processed this chunk)
sf_seek(pFile, pos, SEEK_SET);
}
}
else
pPlayer->file_read_pos += (nFramesRead = sf_readf_float(pFile, pBufferOut, nMaxFrames));
} else {
// Populate SRC input buffer before SRC process
if(bReverse) {
if(pPlayer->file_read_pos > nMaxFrames)
pPlayer->file_read_pos -= nMaxFrames;
else
pPlayer->file_read_pos = 0;
sf_count_t pos = sf_seek(pFile, pPlayer->file_read_pos, SEEK_SET);
if(pos >= 0) {
nFramesRead = sf_readf_float(pFile, pBufferRev, nMaxFrames);
size_t wPos = nUnusedFrames;
for(size_t i = nFramesRead; i == 0; --i) {
for (size_t j = 0; j < pPlayer->sf_info.channels; ++j) {
pBufferIn[wPos] = pBufferRev[(i - 1) * pPlayer->sf_info.channels + j];
++wPos;
}
}
sf_seek(pFile, pos, SEEK_SET);
}
}
else
pPlayer->file_read_pos += (nFramesRead = sf_readf_float(pFile, pBufferIn + nUnusedFrames * pPlayer->sf_info.channels, nMaxFrames));
}
getMutex();
if(nFramesRead) {
// Got some audio data to process...
// Remain in LOADING state to trigger next file read when FIFO has sufficient space
releaseMutex();
DPRINTF("libzynaudioplayer read %u frames into input buffer\n", nFramesRead);
if(srcData.src_ratio != 1.0) {
// We need to perform SRC on this block of code
srcData.input_frames = nFramesRead;
int rc = src_process(pSrcState, &srcData);
if(rc) {
DPRINTF("SRC failed with error %d, %lu frames generated\n", nFramesRead, srcData.output_frames_gen);
} else {
DPRINTF("SRC suceeded - %lu frames generated, %lu frames used, %lu frames unused\n", srcData.output_frames_gen, srcData.input_frames_used, nUnusedFrames);
nUnusedFrames = nFramesRead - srcData.input_frames_used;
nFramesRead = srcData.output_frames_gen;
// Shift unused samples to start of buffer
memcpy(pBufferIn, pBufferIn + srcData.input_frames_used * sizeof(float) * pPlayer->sf_info.channels, nUnusedFrames * sizeof(float) * pPlayer->sf_info.channels);
}
} else {
//DPRINTF("No SRC, read %u frames\n", nFramesRead);
}
// Demux samples and populate playback ring buffers
for(size_t frame = 0; frame < nFramesRead; ++frame) {
float fA = 0.0, fB = 0.0;
size_t sample = frame * pPlayer->sf_info.channels;
if(pPlayer->sf_info.channels > 1) {
if(pPlayer->track_a < 0) {
// Send sum of odd channels to A
for(int track = 0; track < pPlayer->sf_info.channels; track += 2)
fA += pBufferOut[sample + track] / (pPlayer->sf_info.channels / 2);
} else {
// Send pPlayer->track to A
fA = pBufferOut[sample + pPlayer->track_a];
}
if(pPlayer->track_b < 0) {
// Send sum of odd channels to B
for(int track = 0; track + 1 < pPlayer->sf_info.channels; track += 2)
fB += pBufferOut[sample + track + 1] / (pPlayer->sf_info.channels / 2);
} else {
// Send pPlayer->track to B
fB = pBufferOut[sample + pPlayer->track_b];
}
} else {
// Mono source so send to both outputs
fA = pBufferOut[sample] / 2;
fB = pBufferOut[sample] / 2;
}
int nWrote = jack_ringbuffer_write(pPlayer->ringbuffer_b, (const char*)(&fB), sizeof(float));
if(sizeof(float) < jack_ringbuffer_write(pPlayer->ringbuffer_a, (const char*)(&fA), nWrote)) {
// Shouldn't underun due to previous wait for space but just in case...
fprintf(stderr, "libZynAudioPlayer Underrun during writing to ringbuffer - this should never happen!!!\n");
break;
}
}
} else if(pPlayer->loop == 1) {
// Short read - looping so fill from loop start point in file
pPlayer->file_read_status = LOOPING;
//srcData.end_of_input = 1;
releaseMutex();
DPRINTF("libzynaudioplayer read to loop point in input file - setting loading status to looping\n");
} else {
// End of file
pPlayer->file_read_status = IDLE;
srcData.end_of_input = 1;
releaseMutex();
DPRINTF("libzynaudioplayer read to end of input file - setting loading status to IDLE\n");
}
} else {
pPlayer->file_read_status = WAITING;
}
}
//if(pPlayer->file_read_status != LOOPING) {
send_notifications(pPlayer, NOTIFY_ALL);
usleep(10000); // Reduce CPU load by waiting until next file read operation
//}
}
}
if(pFile) {
int nError = sf_close(pFile);
if(nError != 0)
fprintf(stderr, "libaudioplayer error: failed to close file with error code %d\n", nError);
else
pPlayer->filename = "";
}
pPlayer->play_pos_frames = 0;
pPlayer->cb_fn = NULL;
if(pSrcState)
pSrcState = src_delete(pSrcState);
DPRINTF("File reader thread ended\n");
pthread_exit(NULL);
}
/**** player instance functions take 'handle' param to identify player instance****/
uint8_t load(AUDIO_PLAYER * pPlayer, const char* filename, cb_fn_t cb_fn) {
unload(pPlayer);
pPlayer->cb_fn;
pPlayer->track_a = 0;
pPlayer->track_b = 0;
pPlayer->filename = filename;
pPlayer->file_open = FILE_OPENING;
if(pthread_create(&(pPlayer->file_thread), 0, file_thread_fn, pPlayer)) {
fprintf(stderr, "libzynaudioplayer error: failed to create file reading thread\n");
unload(pPlayer);
return 0;
}
while(pPlayer->file_open == FILE_OPENING) {
usleep(10000); //!@todo Optimise wait for file open
}
if(pPlayer->file_open) {
pPlayer->cb_fn = cb_fn;
}
return (pPlayer->file_open == FILE_OPEN);
}
void unload(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || !pPlayer->file_thread)
return;
stop_playback(pPlayer);
pPlayer->file_open = FILE_CLOSED;
pPlayer->cue_points.clear();
pthread_join(pPlayer->file_thread, NULL);
}
uint8_t save(AUDIO_PLAYER * pPlayer, const char* filename) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return 0;
AUDIO_PLAYER* overwrite = NULL;
for(auto it = g_vPlayers.begin(); it != g_vPlayers.end(); ++it) {
if(strcmp((*it)->filename.c_str(), filename) == 0) {
// Trying to overwrite an open file
unload(*it);
overwrite = *it;
break;
}
}
SF_INFO sfinfo;
memset(&sfinfo, 0, sizeof (sfinfo)); // This triggers sf_open to populate info structure
SNDFILE* infile = sf_open(pPlayer->filename.c_str(), SFM_READ, &sfinfo);
if(!infile || sfinfo.channels < 1) {
fprintf(stderr, "libaudioplayer error: failed to open file %s: %s\n", pPlayer->filename.c_str(), sf_strerror(infile));
return 0;
}
sfinfo.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
if (!sf_format_check (&sfinfo)) {
sf_close (infile) ;
fprintf(stderr, "Invalid encoding\n") ;
return 0;
};
SNDFILE* outfile = sf_open(filename, SFM_WRITE, &sfinfo);
if(!outfile) {
fprintf(stderr, "libaudioplayer error: failed to open file %s: %s\n", filename, sf_strerror(outfile));
sf_close(infile);
return 0;
}
// sndfile cue points are a structure of {quantity of points (uint32) + n x SF_CUE_POINT structs}
uint32_t count = 0;
SF_CUES cues;
for (size_t i = 0; i < pPlayer->cue_points.size(); ++i) {
int64_t offset = pPlayer->cue_points[i].offset - pPlayer->crop_start;
if (offset < 0)
continue;
cues.cue_points[i].indx = count;
cues.cue_points[i].position = 0;
cues.cue_points[i].fcc_chunk = 0;
cues.cue_points[i].chunk_start = 0;
cues.cue_points[i].block_start = 0;
cues.cue_points[i].sample_offset = offset;
memcpy(cues.cue_points[i].name, pPlayer->cue_points[i].name, 256);
if(++count > 99)
break;
}
cues.cue_count = count;
size_t cue_size = sizeof(uint32_t) + count * sizeof(SF_CUE_POINT);
if (SF_TRUE != sf_command(outfile, SFC_SET_CUE, &cues, cue_size))
fprintf(stderr, "Failed to set cue points: %s\n", sf_strerror(outfile));
if(pPlayer->beats) {
SF_LOOP_INFO loopInfo;
loopInfo.time_sig_num = 4; //!@todo Get time signature
loopInfo.time_sig_den = 4;
loopInfo.bpm = g_tempo;
loopInfo.num_beats = pPlayer->beats;
loopInfo.loop_mode = pPlayer->loop?SF_LOOP_FORWARD:SF_LOOP_NONE;
loopInfo.root_key = pPlayer->base_note;
//!@todo sf_command does not support SFC_SET_LOOP_INFO
//sf_command(outfile, SFC_SET_LOOP_INFO, &loopInfo, sizeof(loopInfo));
}
// loop points
SF_INSTRUMENT inst;
inst.basenote = pPlayer->base_note;
inst.detune = 0;
inst.gain = (int8_t)log10f(pPlayer->gain) * 20,
inst.key_lo = 0,
inst.key_hi = 127,
inst.velocity_lo = 0,
inst.velocity_hi = 127,
inst.loop_count = 1;
inst.loops[0].mode = pPlayer->loop?SF_LOOP_FORWARD:SF_LOOP_NONE;
inst.loops[0].start = pPlayer->loop_start;
inst.loops[0].end = pPlayer->loop_end;
inst.loops[0].count = 0;
sf_command(outfile, SFC_SET_INSTRUMENT, &inst, sizeof(inst));
float buffer[1024 * sfinfo.channels];
sf_count_t pos = sf_seek(infile, pPlayer->crop_start, SEEK_SET);
uint32_t duration = pPlayer->crop_end - pPlayer->crop_start;
while(duration) {
uint32_t frames = sf_readf_float(infile, buffer, 1024);
if (duration > frames) {
sf_writef_float(outfile, buffer, frames);
duration -= frames;
}
else {
sf_writef_float(outfile, buffer, duration);
duration = 0;
}
}
sf_close(infile);
sf_close(outfile);
if(overwrite)
load(overwrite, overwrite->filename.c_str(), overwrite->cb_fn);
return 1;
}
const char* get_filename(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return "";
return pPlayer->filename.c_str();
}
float get_duration(AUDIO_PLAYER * pPlayer) {
if(pPlayer && pPlayer->file_open == FILE_OPEN && pPlayer->sf_info.samplerate)
return (float)pPlayer->sf_info.frames / pPlayer->sf_info.samplerate / pPlayer->speed;
return 0.0f;
}
void set_position(AUDIO_PLAYER * pPlayer, float time) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return;
sf_count_t frames = time * g_samplerate * pPlayer->speed;
if(frames > pPlayer->crop_end_src)
frames = pPlayer->crop_end_src;
else if(frames < pPlayer->crop_start_src)
frames = pPlayer->crop_start_src;
getMutex();
pPlayer->play_pos_frames = frames;
pPlayer->file_read_status = SEEKING;
releaseMutex();
DPRINTF("New position requested, setting loading status to SEEKING\n");
send_notifications(pPlayer, NOTIFY_POSITION);
}
float get_position(AUDIO_PLAYER * pPlayer) {
if(pPlayer && pPlayer->file_open == FILE_OPEN)
return (float)(pPlayer->play_pos_frames) / g_samplerate / pPlayer->speed;
return 0.0;
}
void enable_loop(AUDIO_PLAYER * pPlayer, uint8_t nLoop) {
if(!pPlayer)
return;
getMutex();
pPlayer->loop = nLoop;
if(nLoop && pPlayer->play_pos_frames > pPlayer->loop_end_src)
pPlayer->play_pos_frames = pPlayer->loop_start_src;
pPlayer->file_read_status = SEEKING;
releaseMutex();
send_notifications(pPlayer, NOTIFY_LOOP);
}
void set_loop_start_time(AUDIO_PLAYER * pPlayer, float time) {
if(!pPlayer)
return;
jack_nframes_t frames = pPlayer->sf_info.samplerate * time;
if(frames >= pPlayer->loop_end)
frames = pPlayer->loop_end - 1;
if(frames < pPlayer->crop_start)
frames = pPlayer->crop_start;
getMutex();
pPlayer->loop_start = frames;
pPlayer->loop_start_src = pPlayer->loop_start * pPlayer->src_ratio;
if(pPlayer->loop == 1 && pPlayer->looped)
pPlayer->file_read_status = SEEKING;
releaseMutex();
pPlayer->last_loop_start = -1;
send_notifications(pPlayer, NOTIFY_LOOP_START);
}
float get_loop_start_time(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->sf_info.samplerate == 0)
return 0.0;
return (float)(pPlayer->loop_start) / pPlayer->sf_info.samplerate;
}
void set_loop_end_time(AUDIO_PLAYER * pPlayer, float time) {
if(!pPlayer)
return;
jack_nframes_t frames = pPlayer->sf_info.samplerate * time;
if(frames <= pPlayer->loop_start)
frames = pPlayer->loop_start + 1;
if(frames > pPlayer->crop_end)
frames = pPlayer->crop_end;
getMutex();
pPlayer->loop_end = frames;
pPlayer->loop_end_src = pPlayer->loop_end * pPlayer->src_ratio;
if(pPlayer->loop == 1 && pPlayer->looped)
pPlayer->file_read_status = SEEKING;
releaseMutex();
pPlayer->last_loop_end = -1;
send_notifications(pPlayer, NOTIFY_LOOP_END);
}
float get_loop_end_time(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->sf_info.samplerate == 0)
return 0.0;
return (float)(pPlayer->loop_end) / pPlayer->sf_info.samplerate;
}
uint8_t is_loop(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return 0;
return(pPlayer->loop);
}
void set_crop_start_time(AUDIO_PLAYER * pPlayer, float time) {
if(!pPlayer)
return;
if(time < 0.0)
time = 0.0;
jack_nframes_t frames = pPlayer->sf_info.samplerate * time;
if(frames >= pPlayer->crop_end)
frames = pPlayer->crop_end - 1;
if(frames > pPlayer->loop_end)
set_loop_end_time(pPlayer, time);
if(frames > pPlayer->loop_start)
set_loop_start_time(pPlayer, time);
getMutex();
pPlayer->crop_start = frames;
pPlayer->crop_start_src = pPlayer->crop_start * pPlayer->src_ratio;
releaseMutex();
if(pPlayer->play_pos_frames < frames)
set_position(pPlayer, time);
pPlayer->last_crop_start = -1;
updateTempo(pPlayer);
send_notifications(pPlayer, NOTIFY_CROP_START);
}
float get_crop_start_time(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->sf_info.samplerate == 0)
return 0.0;
return (float)(pPlayer->crop_start) / pPlayer->sf_info.samplerate;
}
void set_crop_end_time(AUDIO_PLAYER * pPlayer, float time) {
if(!pPlayer)
return;
jack_nframes_t frames = pPlayer->sf_info.samplerate * time;
if(frames < pPlayer->crop_start)
frames = pPlayer->crop_start + 1;
if(frames > pPlayer->sf_info.frames)
frames = pPlayer->sf_info.frames;
if(frames < pPlayer->loop_end)
set_loop_end_time(pPlayer, time);
if(frames < pPlayer->loop_start)
set_loop_start_time(pPlayer, time);
getMutex();
pPlayer->crop_end = frames;
pPlayer->crop_end_src = frames * pPlayer->src_ratio;
if(pPlayer->crop_end_src > pPlayer->frames) {
pPlayer->crop_end_src = pPlayer->frames;
pPlayer->crop_end = pPlayer->frames / pPlayer->src_ratio;
}
if(pPlayer->play_pos_frames > pPlayer->crop_end_src) {
pPlayer->play_pos_frames = pPlayer->crop_end_src;
pPlayer->file_read_status = SEEKING;
} else
pPlayer->file_read_status = WAITING;
releaseMutex();
pPlayer->last_crop_end = -1;
updateTempo(pPlayer);
send_notifications(pPlayer, NOTIFY_CROP_END);
}
float get_crop_end_time(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->sf_info.samplerate == 0)
return 0.0;
return (float)(pPlayer->crop_end) / pPlayer->sf_info.samplerate;
}
int32_t add_cue_point(AUDIO_PLAYER * pPlayer, float position, const char* name) {
if(!pPlayer || position < 0.0)
return -1;
uint32_t frames = position * pPlayer->sf_info.samplerate;
if (frames >= pPlayer->sf_info.frames)
return -1;
for (size_t i = 0; i < pPlayer->cue_points.size(); ++i) {
if (pPlayer->cue_points[i].offset == frames)
return -1;
if (pPlayer->cue_points[i].offset > frames) {
pPlayer->cue_points.insert(pPlayer->cue_points.begin() + i, cue_point(frames, name));
return i;
}
}
pPlayer->cue_points.push_back(cue_point(frames, name));
return pPlayer->cue_points.size() - 1;
}
int32_t remove_cue_point(AUDIO_PLAYER * pPlayer, float position) {
if(!pPlayer || position < 0.0)
return -1;
int32_t minOffset = 0.5 * pPlayer->sf_info.samplerate;
int32_t markerOffset = minOffset;
int32_t frames = position * pPlayer->sf_info.samplerate;
int32_t result = -1;
for (int32_t i = 0; i < pPlayer->cue_points.size(); ++i) {
int32_t dT = abs(int32_t(pPlayer->cue_points[i].offset) - frames);
if (dT < markerOffset) {
result = i;
markerOffset = dT;
}
}
if (markerOffset < minOffset) {
pPlayer->cue_points.erase(pPlayer->cue_points.begin() + result);
return result;
}
return -1;
}
uint32_t get_cue_point_count(AUDIO_PLAYER * pPlayer) {
if(!pPlayer)
return 0;
return pPlayer->cue_points.size();
}
float get_cue_point_position(AUDIO_PLAYER * pPlayer, uint32_t index) {
if (!pPlayer || index >= pPlayer->cue_points.size() || pPlayer->sf_info.samplerate < 1000)
return -1.0;
return float(pPlayer->cue_points[index].offset) / pPlayer->sf_info.samplerate;
}
bool set_cue_point_position(AUDIO_PLAYER * pPlayer, uint32_t index, float position) {
if (!pPlayer || index >= pPlayer->cue_points.size() || position < 0.0)
return false;
uint32_t frames = position * pPlayer->sf_info.samplerate;
if (frames >= pPlayer->sf_info.frames)
return false;
pPlayer->cue_points[index].offset = frames;
return true;
}
const char* get_cue_point_name(AUDIO_PLAYER * pPlayer, uint32_t index) {
if (!pPlayer || index >= pPlayer->cue_points.size())
return "";
return pPlayer->cue_points[index].name;
}
bool set_cue_point_name(AUDIO_PLAYER * pPlayer, uint32_t index, const char* name) {
if (!pPlayer || index >= pPlayer->cue_points.size())
return false;
if (strlen(name) > 255)
return false;
strcpy(pPlayer->cue_points[index].name, name);
return true;
}
void clear_cue_points(AUDIO_PLAYER * pPlayer) {
if(pPlayer)
pPlayer->cue_points.clear();
}
void start_playback(AUDIO_PLAYER * pPlayer) {
if(pPlayer && g_jack_client && pPlayer->file_open == FILE_OPEN && pPlayer->play_state != PLAYING) {
pPlayer->varispeed = pPlayer->play_varispeed;
pPlayer->play_state = STARTING;
pPlayer->time_ratio_dirty = true;
}
send_notifications(pPlayer, NOTIFY_TRANSPORT);
}
void stop_playback(AUDIO_PLAYER * pPlayer) {
if(pPlayer && pPlayer->play_state != STOPPED) {
pPlayer->play_state = STOPPING;
pPlayer->play_varispeed = pPlayer->varispeed;
}
send_notifications(pPlayer, NOTIFY_TRANSPORT);
}
uint8_t get_playback_state(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return STOPPED;
return pPlayer->play_state;
}
int get_samplerate(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return g_samplerate;
return pPlayer->sf_info.samplerate;
}
const char* get_codec(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return "NONE";
// Define some constants that are not included in my version of sndfile header
static char buffer[20];
const char* sType = NULL;
const char* sSubtype = NULL;
SF_FORMAT_INFO format_info;
format_info.format = pPlayer->sf_info.format;
if(sf_command(NULL, SFC_GET_FORMAT_INFO, &format_info, sizeof(format_info)))
return "UNKNOWN";
return format_info.name;
}
int get_channels(AUDIO_PLAYER * pPlayer) {
if(!pPlayer || pPlayer->file_open != FILE_OPEN)
return 0;
return pPlayer->sf_info.channels;