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139 lines
No EOL
3.8 KiB
C++
139 lines
No EOL
3.8 KiB
C++
#include "api__in_mod.h"
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#include <libopenmpt/libopenmpt.h>
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#include "../nsutil/pcm.h"
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static const size_t kModBufferSize = 512;
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static const unsigned int kModSampleRate = 44100; // TODO(benski) configurable!
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openmpt_module *OpenMod(const wchar_t *filename);
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class PlayParams
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{
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public:
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PlayParams();
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~PlayParams();
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openmpt_module *mod;
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float *buffer;
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int bps;
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int channels;
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int sample_rate;
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bool use_float;
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size_t (*openmpt_read)(openmpt_module * mod, int32_t samplerate, size_t count, float *interleaved_stereo);
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};
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PlayParams::PlayParams()
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{
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mod = 0;
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buffer = 0;
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}
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PlayParams::~PlayParams()
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{
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openmpt_module_destroy(mod);
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free(buffer);
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}
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static PlayParams *ExtendedOpen(const wchar_t *fn, int *size, int *bps, int *nch, int *srate, bool use_float)
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{
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float *float_buffer = 0;
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size_t (*openmpt_read)(openmpt_module * mod, int32_t samplerate, size_t count, float *interleaved_stereo)=openmpt_module_read_interleaved_float_stereo;
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openmpt_module *mod = OpenMod(fn);
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if (!mod) {
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return 0;
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}
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int requested_channels = *nch;
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int requested_bits = *bps;
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int requested_srate = *srate;
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if (!requested_channels) {
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requested_channels=2;
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}
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if (!requested_bits) {
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if (use_float) {
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requested_bits=32;
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} else {
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requested_bits=16;
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}
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}
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if (!requested_srate) {
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requested_srate = kModSampleRate;
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}
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if (requested_channels == 1) {
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openmpt_read = openmpt_module_read_float_mono;
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} else if (requested_channels < 4) {
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requested_channels = 2;
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openmpt_read = openmpt_module_read_interleaved_float_stereo;
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} else if (requested_channels) {
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requested_channels = 4;
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openmpt_read = openmpt_module_read_interleaved_float_quad;
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}
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if (!use_float) {
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float_buffer = (float *)malloc(sizeof(float) * kModBufferSize * requested_channels);
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if (!float_buffer) {
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openmpt_module_destroy(mod);
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return 0;
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}
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}
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PlayParams *play_params = new PlayParams;
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if (!play_params) {
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openmpt_module_destroy(mod);
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free(float_buffer);
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return 0;
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}
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play_params->mod = mod;
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play_params->buffer = float_buffer;
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play_params->bps = requested_bits;
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play_params->channels = requested_channels;
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play_params->use_float = use_float;
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play_params->openmpt_read = openmpt_read;
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play_params->sample_rate = requested_srate;
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*nch = requested_channels;
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*srate = requested_srate;
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*bps = requested_bits;
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*size = (int)(openmpt_module_get_duration_seconds(mod) * (double)requested_bits * (double)requested_srate * (double)requested_channels / 8.0);
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return play_params;
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}
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extern "C" __declspec(dllexport) intptr_t winampGetExtendedRead_openW_float(const wchar_t *fn, int *size, int *bps, int *nch, int *srate)
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{
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return (intptr_t)ExtendedOpen(fn, size, bps, nch, srate, true);
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}
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extern "C" __declspec(dllexport) intptr_t winampGetExtendedRead_openW(const wchar_t *fn, int *size, int *bps, int *nch, int *srate)
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{
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return (intptr_t)ExtendedOpen(fn, size, bps, nch, srate, false);
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}
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extern "C" __declspec(dllexport) size_t winampGetExtendedRead_getData(intptr_t handle, char *dest, size_t len, int *killswitch)
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{
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PlayParams *play_params = (PlayParams *)handle;
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size_t requested_samples = len / (play_params->channels * play_params->bps/8);
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if (play_params->use_float) {
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return play_params->openmpt_read(play_params->mod, play_params->sample_rate, requested_samples, (float *)dest) * sizeof(float) * play_params->channels;
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} else {
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if (requested_samples > kModBufferSize) {
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requested_samples = kModBufferSize;
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}
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size_t count = play_params->openmpt_read(play_params->mod, play_params->sample_rate, requested_samples, play_params->buffer);
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nsutil_pcm_FloatToInt_Interleaved(dest, play_params->buffer, play_params->bps, play_params->channels*count);
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return count * play_params->bps * play_params->channels / 8;
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}
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}
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extern "C" __declspec(dllexport) void winampGetExtendedRead_close(intptr_t handle)
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{
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PlayParams *play_params = (PlayParams *)handle;
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delete play_params;
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} |