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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 "stream.h"
#include "muxer.h"
#include "ae_twolame.h"
#include "libmpdemux/mp3_hdr.h"
static int
param_bitrate = 192,
param_psy = 3,
param_maxvbr = 0,
param_errprot = 0,
param_debug = 0;
static float param_vbr = 0;
static char *param_mode = "stereo";
m_option_t twolameopts_conf[] = {
{"br", ¶m_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
{"mode", ¶m_mode, CONF_TYPE_STRING, 0, 0, 0, NULL},
{"psy", ¶m_psy, CONF_TYPE_INT, CONF_RANGE, -1, 4, NULL},
{"vbr", ¶m_vbr, CONF_TYPE_FLOAT, CONF_RANGE, -50, 50, NULL},
{"maxvbr", ¶m_maxvbr, CONF_TYPE_INT, 0, 0, 0, NULL},
{"errprot", ¶m_errprot, CONF_TYPE_INT, CONF_RANGE, 0, 1, NULL},
{"debug", ¶m_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
static int bind_twolame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
{
mpae_twolame_ctx *ctx = (mpae_twolame_ctx *) encoder->priv;
mux_a->wf = malloc(sizeof(WAVEFORMATEX)+256);
mux_a->wf->wFormatTag = 0x50;
mux_a->wf->nChannels = encoder->params.channels;
mux_a->wf->nSamplesPerSec = encoder->params.sample_rate;
mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
if(ctx->vbr || ((mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame) % mux_a->wf->nSamplesPerSec))
{
mux_a->h.dwScale = encoder->params.samples_per_frame;
mux_a->h.dwRate = encoder->params.sample_rate;
mux_a->h.dwSampleSize = 0; // Blocksize not constant
}
else
{
mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame)/ mux_a->wf->nSamplesPerSec; /* for cbr */
mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
mux_a->h.dwSampleSize = mux_a->h.dwScale;
}
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 = 0; //12;
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);
encoder->input_format = AF_FORMAT_S16_NE;
encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
return 1;
}
static int encode_twolame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
{
mpae_twolame_ctx *ctx = (mpae_twolame_ctx *)encoder->priv;
int ret_size = 0, r2;
len /= (2*encoder->params.channels);
ret_size = twolame_encode_buffer_interleaved(ctx->twolame_ctx, src, len, dest, max_size);
r2 = mp_decode_mp3_header(dest);
mp_msg(MSGT_MENCODER, MSGL_DBG2, "\nSIZE: %d, max: %d, r2: %d\n", ret_size, max_size, r2);
if(r2 > 0)
ret_size = r2;
return ret_size;
}
int close_twolame(audio_encoder_t *encoder)
{
free(encoder->priv);
return 1;
}
static int get_frame_size(audio_encoder_t *encoder)
{
int sz;
if(encoder->stream->buffer_len < 4)
return 0;
sz = mp_decode_mp3_header(encoder->stream->buffer);
if(sz <= 0)
return 0;
return sz;
}
int mpae_init_twolame(audio_encoder_t *encoder)
{
int mode;
mpae_twolame_ctx *ctx = NULL;
if(encoder->params.channels == 1)
{
mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_twolame, 1 audio channel, forcing mono mode\n");
mode = TWOLAME_MONO;
}
else if(encoder->params.channels == 2)
{
if(! strcasecmp(param_mode, "dual"))
mode = TWOLAME_DUAL_CHANNEL;
else if(! strcasecmp(param_mode, "jstereo"))
mode = TWOLAME_JOINT_STEREO;
else if(! strcasecmp(param_mode, "stereo"))
mode = TWOLAME_STEREO;
else
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, unknown mode %s, exiting\n", param_mode);
}
}
else
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, Twolame can't encode > 2 channels, exiting\n");
ctx = (mpae_twolame_ctx *) calloc(1, sizeof(mpae_twolame_ctx));
if(ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't alloc a %d bytes context, exiting\n", sizeof(mpae_twolame_ctx));
return 0;
}
ctx->twolame_ctx = twolame_init();
if(ctx->twolame_ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't initial parameters from libtwolame, exiting\n");
free(ctx);
return 0;
}
ctx->vbr = 0;
if(twolame_set_num_channels(ctx->twolame_ctx, encoder->params.channels) != 0)
return 0;
if(twolame_set_mode(ctx->twolame_ctx, mode) != 0)
return 0;
if(twolame_set_in_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(twolame_set_out_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(encoder->params.sample_rate < 32000)
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG2);
else
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG1);
if(twolame_set_psymodel(ctx->twolame_ctx, param_psy) != 0)
return 0;
if(twolame_set_bitrate(ctx->twolame_ctx, param_bitrate) != 0)
return 0;
if(param_errprot)
if(twolame_set_error_protection(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(param_vbr != 0)
{
if(twolame_set_VBR(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(twolame_set_VBR_q(ctx->twolame_ctx, param_vbr) != 0)
return 0;
if(twolame_set_padding(ctx->twolame_ctx, FALSE) != 0)
return 0;
if(param_maxvbr)
{
if(twolame_set_VBR_max_bitrate_kbps(ctx->twolame_ctx, param_maxvbr) != 0)
return 0;
}
ctx->vbr = 1;
}
if(twolame_set_verbosity(ctx->twolame_ctx, param_debug) != 0)
return 0;
if(twolame_init_params(ctx->twolame_ctx) != 0)
return 0;
encoder->params.bitrate = param_bitrate * 1000;
encoder->params.samples_per_frame = 1152;
encoder->priv = ctx;
encoder->decode_buffer_size = 1152 * 2 * encoder->params.channels;
encoder->bind = bind_twolame;
encoder->get_frame_size = get_frame_size;
encoder->encode = encode_twolame;
encoder->close = close_twolame;
return 1;
}
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