winamp/Src/Plugins/Encoder/enc_fhgaac/FhGAACEncoder.cpp
2024-09-24 14:54:57 +02:00

129 lines
3.3 KiB
C++

#include "FhGAACEncoder.h"
#include "mp4FastAAClib.h"
#include <malloc.h>
#include "config.h"
#include "../nsutil/pcm.h"
FhGAACEncoder *FhGAACEncoder::CreateDecoder(const AACConfiguration *cfg, int nch, int srate, int bps)
{
MPEG4ENC_ERROR err;
MPEG4ENC_SETUP setup;
setup.aot = AACConfig_GetAOT(cfg);
setup.nBitRate = AACConfig_GetBitrate(cfg, nch);
setup.bitrateMode = AACConfig_GetBitrateMode(cfg);
setup.quality = MP4_QUAL_HIGH;
setup.chMode = AACConfig_GetChannelMode(cfg, nch);
setup.sbrSignaling = MP4_SBRSIG_EXPL_BC;
setup.nSampleRateIn = srate;
setup.transportFormat = MP4_TT_RAW;
setup.nGranuleLength = MP4_GRANULE_1024;
setup.metadataMode = MP4_METADATA_NONE;
HANDLE_MPEG4ENC_ENCODER encoder=0;
err = MPEG4ENC_Configure(&encoder, &setup);
if (err != MPEG4ENC_NO_ERROR)
{
return 0;
}
unsigned int first_samples;
err = MPEG4ENC_Open(&encoder, &first_samples);
if (err != MPEG4ENC_NO_ERROR)
{
MPEG4ENC_Close(&encoder);
return 0;
}
float *sample_buffer = (float *)malloc(first_samples * sizeof(float));
if (!sample_buffer)
{
MPEG4ENC_Close(&encoder);
return 0;
}
FhGAACEncoder *fhg_enc = new FhGAACEncoder(encoder, &setup, nch, srate, bps, sample_buffer, first_samples);
if (!fhg_enc)
{
free(sample_buffer);
MPEG4ENC_Close(&encoder);
}
AACConfig_GetToolString(&setup, fhg_enc->tool, sizeof(fhg_enc->tool));
return fhg_enc;
}
FhGAACEncoder::FhGAACEncoder(HANDLE_MPEG4ENC_ENCODER encoder, const MPEG4ENC_SETUP *setup, int nch, int srate, int bps, float *sample_buffer, unsigned int next_samples)
: encoder(encoder), channels(nch), sample_rate(srate), bits_per_sample(bps), sample_buffer(sample_buffer), next_samples(next_samples)
{
MPEG4ENC_INFO info;
MPEG4ENC_GetInfo(encoder, &info);
samples_per_frame = info.nSamplesFrame[0];
if (info.nSamplingRate[0] != srate)
resampling = true;
else
resampling = false;
finishing=false;
total_samples=0;
decodable_samples=0;
// TODO: move this somewhere where we can error-check
mp4_writer.AddAudioTrack(encoder, setup);
}
FhGAACEncoder::~FhGAACEncoder()
{
free(sample_buffer);
MPEG4ENC_Close(&encoder);
}
int FhGAACEncoder::Encode(int framepos, void *in, int in_avail, int *in_used, void *out, int out_avail)
{
if (!in_avail && !finishing)
return 0;
size_t num_samples = in_avail / (bits_per_sample/8);
num_samples = min(num_samples, next_samples);
nsutil_pcm_IntToFloat_Interleaved(sample_buffer, in, bits_per_sample, num_samples);
int samples_consumed=0;
int out_used = 0;
MPEG4ENC_AUINFO *info;
MPEG4ENC_ERROR err = MPEG4ENC_Encode(encoder, sample_buffer, num_samples, &samples_consumed, &next_samples, (unsigned char * const)out, out_avail, &out_used, &info);
if (err == MPEG4ENC_NO_ERROR && out_used)
{
decodable_samples += samples_per_frame;
mp4_writer.Write(out, out_used, samples_per_frame);
}
else if (err != MPEG4ENC_NO_ERROR)
{
return 0;
}
if (!finishing)
{
*in_used = samples_consumed * (bits_per_sample/8);
total_samples += samples_consumed / channels;
}
return out_used;
}
void FhGAACEncoder::PrepareToFinish()
{
finishing=true;
}
void FhGAACEncoder::Finish(const wchar_t *filename)
{
MPEG4ENC_INFO info;
MPEG4ENC_GetInfo(encoder, &info);
if (!resampling)
mp4_writer.WriteGaps(info.nDelay, decodable_samples-total_samples-info.nDelay, total_samples);
mp4_writer.WriteTool(tool);
mp4_writer.CloseTo(filename);
}