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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 "ae_pcm.h"
static int bind_pcm(audio_encoder_t *encoder, muxer_stream_t *mux_a)
{
mux_a->h.dwScale=1;
mux_a->h.dwRate=encoder->params.sample_rate;
mux_a->wf=malloc(sizeof(WAVEFORMATEX));
mux_a->wf->wFormatTag=0x1; // PCM
mux_a->wf->nChannels=encoder->params.channels;
mux_a->h.dwSampleSize=2*mux_a->wf->nChannels;
mux_a->wf->nBlockAlign=mux_a->h.dwSampleSize;
mux_a->wf->nSamplesPerSec=mux_a->h.dwRate;
mux_a->wf->nAvgBytesPerSec=mux_a->h.dwSampleSize*mux_a->wf->nSamplesPerSec;
mux_a->wf->wBitsPerSample=16;
mux_a->wf->cbSize=0; // FIXME for l3codeca.acm
encoder->input_format = (mux_a->wf->wBitsPerSample==8) ? AF_FORMAT_U8 : AF_FORMAT_S16_LE;
encoder->min_buffer_size = 16384;
encoder->max_buffer_size = mux_a->wf->nAvgBytesPerSec;
return 1;
}
static int encode_pcm(audio_encoder_t *encoder, uint8_t *dest, void *src, int nsamples, int max_size)
{
max_size = min(nsamples, max_size);
memcpy(dest, src, max_size);
return max_size;
}
static int set_decoded_len(audio_encoder_t *encoder, int len)
{
return len;
}
static int close_pcm(audio_encoder_t *encoder)
{
return 1;
}
static int get_frame_size(audio_encoder_t *encoder)
{
return 0;
}
int mpae_init_pcm(audio_encoder_t *encoder)
{
encoder->params.samples_per_frame = encoder->params.sample_rate;
encoder->params.bitrate = encoder->params.sample_rate * encoder->params.channels * 2 * 8;
encoder->decode_buffer_size = encoder->params.bitrate / 8;
encoder->bind = bind_pcm;
encoder->get_frame_size = get_frame_size;
encoder->set_decoded_len = set_decoded_len;
encoder->encode = encode_pcm;
encoder->close = close_pcm;
return 1;
}
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