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philippe44
197
output_dac.c.nocompile
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197
output_dac.c.nocompile
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#include "squeezelite.h"
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#include <signal.h>
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static log_level loglevel;
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static bool running = true;
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extern struct outputstate output;
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extern struct buffer *outputbuf;
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#if REPACK && BYTES_PER_FRAMES == 4
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#error "REPACK is not compatible with BYTES_PER_FRAME=4"
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#endif
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#define LOCK mutex_lock(outputbuf->mutex)
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#define UNLOCK mutex_unlock(outputbuf->mutex)
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#define FRAME_BLOCK MAX_SILENCE_FRAMES
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extern u8_t *silencebuf;
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static u8_t *optr;
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static int bytes_per_frame;
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static thread_type thread;
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static int _dac_write_frames(frames_t out_frames, bool silence, s32_t gainL, s32_t gainR,
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s32_t cross_gain_in, s32_t cross_gain_out, ISAMPLE_T **cross_ptr);
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static void *output_thread();
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void set_volume(unsigned left, unsigned right) {
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LOG_DEBUG("setting internal gain left: %u right: %u", left, right);
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LOCK;
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output.gainL = left;
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output.gainR = right;
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UNLOCK;
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}
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void output_init_dac(log_level level, unsigned output_buf_size, char *params, unsigned rates[], unsigned rate_delay, unsigned idle) {
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loglevel = level;
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LOG_INFO("init output DAC");
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memset(&output, 0, sizeof(output));
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#if BYTES_PER_FRAME == 4
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output.format = S16_LE;
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#else
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output.format = S32_LE;
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#endif
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output.start_frames = FRAME_BLOCK * 2;
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output.write_cb = &_dac_write_frames;
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output.rate_delay = rate_delay;
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if (params) {
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if (!strcmp(params, "32")) output.format = S32_LE;
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if (!strcmp(params, "24")) output.format = S24_3LE;
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if (!strcmp(params, "16")) output.format = S16_LE;
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}
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// ensure output rate is specified to avoid test open
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if (!rates[0]) {
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rates[0] = 44100;
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}
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output_init_common(level, "-", output_buf_size, rates, idle);
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#if LINUX || OSX || FREEBSD || POSIX
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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#ifdef PTHREAD_STACK_MIN
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pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN + OUTPUT_THREAD_STACK_SIZE);
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#endif
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pthread_create(&thread, &attr, output_thread, NULL);
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pthread_attr_destroy(&attr);
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#endif
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#if WIN
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thread = CreateThread(NULL, OUTPUT_THREAD_STACK_SIZE, (LPTHREAD_START_ROUTINE)&output_thread, NULL, 0, NULL);
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#endif
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}
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void output_close_dac(void) {
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LOG_INFO("close output");
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LOCK;
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running = false;
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UNLOCK;
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output_close_common();
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}
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static int _dac_write_frames(frames_t out_frames, bool silence, s32_t gainL, s32_t gainR,
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s32_t cross_gain_in, s32_t cross_gain_out, ISAMPLE_T **cross_ptr) {
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u8_t *obuf;
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if (!silence) {
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if (output.fade == FADE_ACTIVE && output.fade_dir == FADE_CROSS && *cross_ptr) {
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_apply_cross(outputbuf, out_frames, cross_gain_in, cross_gain_out, cross_ptr);
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}
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#if !REPACK
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if (gainL != FIXED_ONE || gainR!= FIXED_ONE) {
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_apply_gain(outputbuf, out_frames, gainL, gainR);
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}
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IF_DSD(
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if (output.outfmt == DOP) {
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update_dop((u32_t *) outputbuf->readp, out_frames, output.invert);
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} else if (output.outfmt != PCM && output.invert)
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dsd_invert((u32_t *) outputbuf->readp, out_frames);
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)
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memcpy(optr, outputbuf->readp, out_frames * BYTES_PER_FRAME);
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#else
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obuf = outputbuf->readp;
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#endif
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} else {
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obuf = silencebuf;
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#if !REPACK
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IF_DSD(
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if (output.outfmt != PCM) {
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obuf = silencebuf_dsd;
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update_dop((u32_t *) obuf, out_frames, false); // don't invert silence
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}
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)
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memcpy(optr, obuf, out_frames * BYTES_PER_FRAME);
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#endif
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}
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#if REPACK
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_scale_and_pack_frames(optr, (s32_t *)(void *)obuf, out_frames, gainL, gainR, output.format);
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#endif
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return (int)out_frames;
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}
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static void *output_thread() {
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// buffer to hold output data so we can block on writing outside of output lock, allocated on init
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u8_t *obuf = malloc(FRAME_BLOCK * BYTES_PER_FRAME);
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unsigned frames = 0;
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#if REPACK
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LOCK;
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switch (output.format) {
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case S32_LE:
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bytes_per_frame = 4 * 2; break;
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case S24_3LE:
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bytes_per_frame = 3 * 2; break;
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case S16_LE:
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bytes_per_frame = 2 * 2; break;
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default:
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bytes_per_frame = 4 * 2; break;
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break;
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}
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UNLOCK;
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#endif
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while (running) {
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LOCK;
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if (output.state == OUTPUT_OFF) {
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UNLOCK;
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usleep(500000);
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continue;
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}
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output.device_frames = 0;
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output.updated = gettime_ms();
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output.frames_played_dmp = output.frames_played;
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optr = obuf + frames * bytes_per_frame;
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frames += _output_frames(FRAME_BLOCK);
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UNLOCK;
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if (frames) {
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// do something with some of these frames...
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usleep((frames * 1000 * 1000) / output.current_sample_rate);
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frames = 0;
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} else {
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usleep((FRAME_BLOCK * 1000 * 1000) / output.current_sample_rate);
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}
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}
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return 0;
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}
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