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#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include "m_option.h"
#include "mp_msg.h"
#include "aviheader.h"
#include "libaf/af_format.h"
#include "ms_hdr.h"
#include "muxer.h"
#include <faac.h>
#include "ae.h"
static faacEncHandle faac;
static faacEncConfigurationPtr config = NULL;
static int
param_bitrate = 128,
param_quality = 0,
param_object_type = MAIN,
param_mpeg = 2,
param_tns = 0,
param_raw = 0,
param_cutoff = 0,
param_format = 16,
param_debug = 0;
static int enc_frame_size = 0, divisor;
static unsigned long samples_input, max_bytes_output;
static unsigned char *decoder_specific_buffer = NULL;
static unsigned long decoder_specific_len = 0;
m_option_t faacopts_conf[] = {
{"br", ¶m_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
{"quality", ¶m_quality, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL},
{"object", ¶m_object_type, CONF_TYPE_INT, CONF_RANGE, MAIN, LTP, NULL},
{"mpeg", ¶m_mpeg, CONF_TYPE_INT, CONF_RANGE, 2, 4, NULL},
{"tns", ¶m_tns, CONF_TYPE_FLAG, 0, 0, 1, NULL},
{"cutoff", ¶m_cutoff, CONF_TYPE_INT, 0, 0, 0, NULL},
{"format", ¶m_format, CONF_TYPE_INT, 0, 0, 0, NULL},
{"raw", ¶m_raw, CONF_TYPE_FLAG, 0, 0, 1, NULL},
{"debug", ¶m_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
static int bind_faac(audio_encoder_t *encoder, muxer_stream_t *mux_a)
{
mux_a->wf = calloc(1, sizeof(WAVEFORMATEX) + decoder_specific_len + 256);
mux_a->wf->wFormatTag = 0x706D;
mux_a->wf->nChannels = encoder->params.channels;
mux_a->h.dwSampleSize=0; // VBR
mux_a->h.dwRate=encoder->params.sample_rate;
mux_a->h.dwScale=encoder->params.samples_per_frame;
mux_a->wf->nSamplesPerSec=mux_a->h.dwRate;
mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
mux_a->wf->nBlockAlign = mux_a->h.dwScale;
mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
mux_a->wf->cbSize = decoder_specific_len;
mux_a->wf->wBitsPerSample = 0; /* does not apply */
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
// Fix allocation
mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
if(config->inputFormat == FAAC_INPUT_FLOAT)
encoder->input_format = AF_FORMAT_FLOAT_NE;
else if(config->inputFormat == FAAC_INPUT_32BIT)
encoder->input_format = AF_FORMAT_S32_NE;
else
encoder->input_format = AF_FORMAT_S16_NE;
encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
if(decoder_specific_buffer && decoder_specific_len)
memcpy(mux_a->wf + 1, decoder_specific_buffer, decoder_specific_len);
return 1;
}
static int get_frame_size(audio_encoder_t *encoder)
{
int sz = enc_frame_size;
enc_frame_size = 0;
return sz;
}
static int encode_faac(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
{
// len is divided by the number of bytes per sample
enc_frame_size = faacEncEncode(faac, (int32_t*) src, len / divisor, dest, max_size);
return enc_frame_size;
}
int close_faac(audio_encoder_t *encoder)
{
return 1;
}
int mpae_init_faac(audio_encoder_t *encoder)
{
if(encoder->params.channels < 1 || encoder->params.channels > 6 || (param_mpeg != 2 && param_mpeg != 4))
{
mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, unsupported number of channels: %d, or mpeg version: %d, exit\n", encoder->params.channels, param_mpeg);
return 0;
}
faac = faacEncOpen(encoder->params.sample_rate, encoder->params.channels, &samples_input, &max_bytes_output);
if(!faac)
{
mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, couldn't init, exit\n");
return 0;
}
mp_msg(MSGT_MENCODER, MSGL_V, "AE_FAAC, sample_input: %u, max_bytes_output: %u\n", samples_input, max_bytes_output);
config = faacEncGetCurrentConfiguration(faac);
if(!config)
{
mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, couldn't get init configuration, exit\n");
return 0;
}
param_bitrate *= 1000;
if(param_quality)
config->quantqual = param_quality;
else
config->bitRate = param_bitrate / encoder->params.channels;
if(param_format==33)
{
config->inputFormat = FAAC_INPUT_FLOAT;
divisor = 4;
}
else if(param_format==32)
{
config->inputFormat = FAAC_INPUT_32BIT;
divisor = 4;
}
else
{
config->inputFormat = FAAC_INPUT_16BIT;
divisor = 2;
}
config->outputFormat = param_raw ? 0 : 1; // 1 is ADTS
config->aacObjectType = param_object_type;
config->mpegVersion = (param_mpeg == 4 ? MPEG4 : MPEG2);
config->useTns = param_tns;
config->allowMidside = 1;
config->shortctl = SHORTCTL_NORMAL;
param_cutoff = param_cutoff ? param_cutoff : encoder->params.sample_rate / 2;
if(param_cutoff > encoder->params.sample_rate / 2)
param_cutoff = encoder->params.sample_rate / 2;
config->bandWidth = param_cutoff;
if(encoder->params.channels == 6)
config->useLfe = 1;
if(!faacEncSetConfiguration(faac, config))
{
mp_msg(MSGT_MENCODER, MSGL_FATAL, "AE_FAAC, counldn't set specified parameters, exiting\n");
return 0;
}
if(param_raw)
faacEncGetDecoderSpecificInfo(faac, &decoder_specific_buffer, &decoder_specific_len);
else
decoder_specific_len = 0;
encoder->params.bitrate = param_bitrate;
encoder->params.samples_per_frame = 1024;
encoder->decode_buffer_size = divisor * samples_input; //samples * 16 bits_per_sample
encoder->bind = bind_faac;
encoder->get_frame_size = get_frame_size;
encoder->encode = encode_faac;
encoder->close = close_faac;
return 1;
}
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