//////////////////////////////////////////////////////////////////////
// Init - initialized or reiniyialized encoder SDK with given input
// and output settings
//////////////////////////////////////////////////////////////////////
HRESULT CEncoder::Init()
{
CAutoLock l(&m_lock);
m_outOffset = 0;
m_outReadOffset = 0;
m_bFinished = FALSE;
m_frameCount = 0;
if (!pgf)
{
if (!m_bInpuTypeSet || !m_bOutpuTypeSet)
return E_UNEXPECTED;
// Init Lame library
// note: newer, safer interface which doesn't
// allow or require direct access to 'gf' struct is being written
// see the file 'API' included with LAME.
if (pgf = lame_init())
{
lame_set_num_channels(pgf, m_wfex.nChannels);
lame_set_in_samplerate(pgf, m_wfex.nSamplesPerSec);
lame_set_out_samplerate(pgf, m_mabsi.dwSampleRate);
if ((lame_get_out_samplerate(pgf) >= 32000) && (m_mabsi.dwBitrate < 32))
lame_set_brate(pgf, 32);
else
lame_set_brate(pgf, m_mabsi.dwBitrate);
lame_set_VBR(pgf, m_mabsi.vmVariable);
lame_set_VBR_min_bitrate_kbps(pgf, m_mabsi.dwVariableMin);
lame_set_VBR_max_bitrate_kbps(pgf, m_mabsi.dwVariableMax);
lame_set_copyright(pgf, m_mabsi.bCopyright);
lame_set_original(pgf, m_mabsi.bOriginal);
lame_set_error_protection(pgf, m_mabsi.bCRCProtect);
lame_set_bWriteVbrTag(pgf, m_mabsi.dwXingTag);
lame_set_strict_ISO(pgf, m_mabsi.dwStrictISO);
lame_set_VBR_hard_min(pgf, m_mabsi.dwEnforceVBRmin);
if (lame_get_num_channels(pgf) == 2 && !m_mabsi.bForceMono)
{
//int act_br = pgf->VBR ? pgf->VBR_min_bitrate_kbps + pgf->VBR_max_bitrate_kbps / 2 : pgf->brate;
// Disabled. It's for user's consideration now
//int rel = pgf->out_samplerate / (act_br + 1);
//pgf->mode = rel < 200 ? m_mabsi.ChMode : JOINT_STEREO;
lame_set_mode(pgf, m_mabsi.ChMode);
}
else
lame_set_mode(pgf, MONO);
if (lame_get_mode(pgf) == JOINT_STEREO)
lame_set_force_ms(pgf, m_mabsi.dwForceMS);
else
lame_set_force_ms(pgf, 0);
// pgf->mode_fixed = m_mabsi.dwModeFixed;
if (m_mabsi.dwVoiceMode != 0)
{
lame_set_lowpassfreq(pgf,12000);
///pgf->VBR_max_bitrate_kbps = 160;
}
if (m_mabsi.dwKeepAllFreq != 0)
{
///pgf->lowpassfreq = -1;
///pgf->highpassfreq = -1;
/// not available anymore
}
lame_set_quality(pgf, m_mabsi.dwQuality);
lame_set_VBR_q(pgf, m_mabsi.dwVBRq);
lame_init_params(pgf);
// encoder delay compensation
{
int const nch = lame_get_num_channels(pgf);
short * start_padd = (short *)calloc(48, nch * sizeof(short));
int out_bytes = 0;
if (nch == 2)
out_bytes = lame_encode_buffer_interleaved(pgf, start_padd, 48, m_outFrameBuf, OUT_BUFFER_SIZE);
else
out_bytes = lame_encode_buffer(pgf, start_padd, start_padd, 48, m_outFrameBuf, OUT_BUFFER_SIZE);
if (out_bytes > 0)
m_outOffset += out_bytes;
free(start_padd);
}
return S_OK;
}
return E_FAIL;
}
return S_OK;
}
static gint mp3_open(void)
{
int imp3;
gfp = lame_init();
if (gfp == NULL)
return 0;
/* setup id3 data */
id3tag_init(gfp);
if (tuple) {
/* XXX write UTF-8 even though libmp3lame does id3v2.3. --yaz */
lameid3.track_name = tuple_get_str (tuple, FIELD_TITLE, NULL);
id3tag_set_title(gfp, lameid3.track_name);
lameid3.performer = tuple_get_str (tuple, FIELD_ARTIST, NULL);
id3tag_set_artist(gfp, lameid3.performer);
lameid3.album_name = tuple_get_str (tuple, FIELD_ALBUM, NULL);
id3tag_set_album(gfp, lameid3.album_name);
lameid3.genre = tuple_get_str (tuple, FIELD_GENRE, NULL);
id3tag_set_genre(gfp, lameid3.genre);
lameid3.year = str_printf ("%d", tuple_get_int (tuple, FIELD_YEAR, NULL));
id3tag_set_year(gfp, lameid3.year);
lameid3.track_number = str_printf ("%d", tuple_get_int (tuple, FIELD_TRACK_NUMBER, NULL));
id3tag_set_track(gfp, lameid3.track_number);
if (force_v2_val) {
id3tag_add_v2(gfp);
}
if (only_v1_val) {
id3tag_v1_only(gfp);
}
if (only_v2_val) {
id3tag_v2_only(gfp);
}
}
/* input stream description */
lame_set_in_samplerate(gfp, input.frequency);
lame_set_num_channels(gfp, input.channels);
/* Maybe implement this? */
/* lame_set_scale(lame_global_flags *, float); */
lame_set_out_samplerate(gfp, out_samplerate_val);
/* general control parameters */
lame_set_bWriteVbrTag(gfp, toggle_xing_val);
lame_set_quality(gfp, algo_quality_val);
if (audio_mode_val != 4) {
AUDDBG("set mode to %d\n", audio_mode_val);
lame_set_mode(gfp, audio_mode_val);
}
lame_set_errorf(gfp, lame_debugf);
lame_set_debugf(gfp, lame_debugf);
lame_set_msgf(gfp, lame_debugf);
if (enc_toggle_val == 0 && vbr_on == 0)
lame_set_brate(gfp, bitrate_val);
else if (vbr_on == 0)
lame_set_compression_ratio(gfp, compression_val);
/* frame params */
lame_set_copyright(gfp, mark_copyright_val);
lame_set_original(gfp, mark_original_val);
lame_set_error_protection(gfp, error_protect_val);
lame_set_strict_ISO(gfp, enforce_iso_val);
if (vbr_on != 0) {
if (vbr_type == 0)
lame_set_VBR(gfp, 2);
else
lame_set_VBR(gfp, 3);
lame_set_VBR_q(gfp, vbr_quality_val);
lame_set_VBR_mean_bitrate_kbps(gfp, abr_val);
lame_set_VBR_min_bitrate_kbps(gfp, vbr_min_val);
lame_set_VBR_max_bitrate_kbps(gfp, vbr_max_val);
lame_set_VBR_hard_min(gfp, enforce_min_val);
}
/* not to write id3 tag automatically. */
lame_set_write_id3tag_automatic(gfp, 0);
if (lame_init_params(gfp) == -1)
return 0;
/* write id3v2 header */
imp3 = lame_get_id3v2_tag(gfp, encbuffer, sizeof(encbuffer));
if (imp3 > 0) {
write_output(encbuffer, imp3);
id3v2_size = imp3;
}
else {
id3v2_size = 0;
}
write_buffer = NULL;
write_buffer_size = 0;
return 1;
}
