mirror of
https://github.com/HIllya51/LunaTranslator.git
synced 2024-12-27 15:44:12 +08:00
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <timing.h>
|
|
#include <shine_mp3.h>
|
|
|
|
#define DR_WAV_IMPLEMENTATION
|
|
#include "dr_wav.h"
|
|
|
|
int stereo = STEREO;
|
|
|
|
DECLARE_API void encodemp3(void *ptr, size_t size, void (*cb)(void *ptr, size_t size), int bitrate)
|
|
{
|
|
shine_config_t config;
|
|
shine_t s;
|
|
int written;
|
|
unsigned char *data;
|
|
/* Set the default MPEG encoding paramters - basically init the struct */
|
|
shine_set_config_mpeg_defaults(&config.mpeg);
|
|
|
|
config.mpeg.bitr = bitrate; // 8-320;
|
|
|
|
uint32_t sampleRate = 0;
|
|
uint64_t totalSampleCount = 0;
|
|
uint32_t channels = 0;
|
|
int16_t *data_in = drwav_open_memory_and_read_pcm_frames_s16(ptr, size, &channels, &sampleRate, &totalSampleCount, NULL);
|
|
if (data_in == NULL)
|
|
return;
|
|
totalSampleCount *= channels;
|
|
double startTime = now();
|
|
config.wave.samplerate = sampleRate;
|
|
config.wave.channels = (decltype(config.wave.channels))channels;
|
|
|
|
/* See if samplerate and bitrate are valid */
|
|
if (shine_check_config(config.wave.samplerate, config.mpeg.bitr) < 0)
|
|
return;
|
|
// printf("Unsupported samplerate/bitrate configuration.");
|
|
|
|
/* Set to stereo mode if wave data is stereo, mono otherwise. */
|
|
if (config.wave.channels > 1)
|
|
config.mpeg.mode = (decltype(config.mpeg.mode))stereo;
|
|
else
|
|
config.mpeg.mode = MONO;
|
|
|
|
/* Initiate encoder */
|
|
s = shine_initialise(&config);
|
|
|
|
int samples_per_pass = shine_samples_per_pass(s) * channels;
|
|
std::string sdata;
|
|
/* All the magic happens here */
|
|
size_t count = totalSampleCount / samples_per_pass;
|
|
int16_t *buffer = data_in;
|
|
for (int i = 0; i < count; i++)
|
|
{
|
|
data = shine_encode_buffer_interleaved(s, buffer, &written);
|
|
sdata += std::string((char *)data, written);
|
|
buffer += samples_per_pass;
|
|
}
|
|
size_t last = totalSampleCount % samples_per_pass;
|
|
if (last != 0)
|
|
{
|
|
int16_t *cache = (int16_t *)calloc(samples_per_pass, sizeof(int16_t));
|
|
if (cache != NULL)
|
|
{
|
|
memcpy(cache, buffer, last * sizeof(int16_t));
|
|
data = shine_encode_buffer_interleaved(s, cache, &written);
|
|
free(cache);
|
|
sdata += std::string((char *)data, written);
|
|
}
|
|
}
|
|
/* Flush and write remaining data. */
|
|
data = shine_flush(s, &written);
|
|
sdata += std::string((char *)data, written);
|
|
/* Close encoder. */
|
|
shine_close(s);
|
|
free(data_in);
|
|
double time_interval = calcElapsed(startTime, now());
|
|
cb(sdata.data(), sdata.size());
|
|
}
|