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