ff_ps_init();
}
+/** Places SBR in pure upsampling mode. */
+static void sbr_turnoff(SpectralBandReplication *sbr) {
+ sbr->start = 0;
+ // Init defults used in pure upsampling mode
+ sbr->kx[1] = 32; //Typo in spec, kx' inits to 32
+ sbr->m[1] = 0;
+ // Reset values for first SBR header
+ sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1;
+ memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters));
+}
+
av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr)
{
float mdct_scale;
- sbr->kx[0] = sbr->kx[1] = 32; //Typo in spec, kx' inits to 32
- sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1;
+ sbr->kx[0] = sbr->kx[1];
+ sbr_turnoff(sbr);
sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128);
sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128);
/* SBR requires samples to be scaled to +/-32768.0 to work correctly.
{
switch (bs_extension_id) {
case EXTENSION_ID_PS:
- if (!ac->m4ac.ps) {
+ if (!ac->oc[1].m4ac.ps) {
av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n");
skip_bits_long(gb, *num_bits_left); // bs_fill_bits
*num_bits_left = 0;
#if 1
*num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps, *num_bits_left);
#else
- av_log_missing_feature(ac->avctx, "Parametric Stereo is", 0);
+ av_log_missing_feature(ac->avctx, "Parametric Stereo", 0);
skip_bits_long(gb, *num_bits_left); // bs_fill_bits
*num_bits_left = 0;
#endif
}
break;
default:
- av_log_missing_feature(ac->avctx, "Reserved SBR extensions are", 1);
+ av_log_missing_feature(ac->avctx, "Reserved SBR extensions", 1);
skip_bits_long(gb, *num_bits_left); // bs_fill_bits
*num_bits_left = 0;
break;
if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) {
if (read_sbr_single_channel_element(ac, sbr, gb)) {
- sbr->start = 0;
+ sbr_turnoff(sbr);
return get_bits_count(gb) - cnt;
}
} else if (id_aac == TYPE_CPE) {
if (read_sbr_channel_pair_element(ac, sbr, gb)) {
- sbr->start = 0;
+ sbr_turnoff(sbr);
return get_bits_count(gb) - cnt;
}
} else {
av_log(ac->avctx, AV_LOG_ERROR,
"Invalid bitstream - cannot apply SBR to element type %d\n", id_aac);
- sbr->start = 0;
+ sbr_turnoff(sbr);
return get_bits_count(gb) - cnt;
}
if (get_bits1(gb)) { // bs_extended_data
if (err < 0) {
av_log(ac->avctx, AV_LOG_ERROR,
"SBR reset failed. Switching SBR to pure upsampling mode.\n");
- sbr->start = 0;
+ sbr_turnoff(sbr);
}
}
sbr->reset = 0;
if (!sbr->sample_rate)
- sbr->sample_rate = 2 * ac->m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support
- if (!ac->m4ac.ext_sample_rate)
- ac->m4ac.ext_sample_rate = 2 * ac->m4ac.sample_rate;
+ sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support
+ if (!ac->oc[1].m4ac.ext_sample_rate)
+ ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate;
if (crc) {
skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check
//Save some state from the previous frame.
sbr->kx[0] = sbr->kx[1];
sbr->m[0] = sbr->m[1];
+ sbr->kx_and_m_pushed = 1;
num_sbr_bits++;
if (get_bits1(gb)) // bs_header_flag
/// Generate the subband filtered lowband
static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64],
- const float X_low[32][40][2], const float Y[2][38][64][2],
- int ch)
+ const float Y0[38][64][2], const float Y1[38][64][2],
+ const float X_low[32][40][2], int ch)
{
int k, i;
const int i_f = 32;
}
for (; k < sbr->kx[0] + sbr->m[0]; k++) {
for (i = 0; i < i_Temp; i++) {
- X[0][i][k] = Y[0][i + i_f][k][0];
- X[1][i][k] = Y[0][i + i_f][k][1];
+ X[0][i][k] = Y0[i + i_f][k][0];
+ X[1][i][k] = Y0[i + i_f][k][1];
}
}
}
for (; k < sbr->kx[1] + sbr->m[1]; k++) {
for (i = i_Temp; i < i_f; i++) {
- X[0][i][k] = Y[1][i][k][0];
- X[1][i][k] = Y[1][i][k][1];
+ X[0][i][k] = Y1[i][k][0];
+ X[1][i][k] = Y1[i][k][1];
}
}
return 0;
/** High Frequency Adjustment (14496-3 sp04 p217) and Mapping
* (14496-3 sp04 p217)
*/
-static void sbr_mapping(AACContext *ac, SpectralBandReplication *sbr,
+static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr,
SBRData *ch_data, int e_a[2])
{
int e, i, m;
uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow;
int k;
+ if (sbr->kx[1] != table[0]) {
+ av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. "
+ "Derived frequency tables were not regenerated.\n");
+ sbr_turnoff(sbr);
+ return AVERROR_BUG;
+ }
for (i = 0; i < ilim; i++)
for (m = table[i]; m < table[i + 1]; m++)
sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i];
}
memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0]));
+ return 0;
}
/// Estimation of current envelope (14496-3 sp04 p218)
}
/// Assembling HF Signals (14496-3 sp04 p220)
-static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2],
+static void sbr_hf_assemble(float Y1[38][64][2],
+ const float X_high[64][40][2],
SpectralBandReplication *sbr, SBRData *ch_data,
const int e_a[2])
{
float (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
int indexnoise = ch_data->f_indexnoise;
int indexsine = ch_data->f_indexsine;
- memcpy(Y[0], Y[1], sizeof(Y[0]));
if (sbr->reset) {
for (i = 0; i < h_SL; i++) {
q_filt = q_temp[i];
}
- sbr->dsp.hf_g_filt(Y[1][i] + kx, X_high + kx, g_filt, m_max,
+ sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
i + ENVELOPE_ADJUSTMENT_OFFSET);
if (e != e_a[0] && e != e_a[1]) {
- sbr->dsp.hf_apply_noise[indexsine](Y[1][i] + kx, sbr->s_m[e],
+ sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
q_filt, indexnoise,
kx, m_max);
} else {
for (m = 0; m < m_max; m++) {
- Y[1][i][m + kx][0] +=
+ Y1[i][m + kx][0] +=
sbr->s_m[e][m] * phi[0][indexsine];
- Y[1][i][m + kx][1] +=
+ Y1[i][m + kx][1] +=
sbr->s_m[e][m] * (phi[1][indexsine] * phi_sign);
phi_sign = -phi_sign;
}
void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
float* L, float* R)
{
- int downsampled = ac->m4ac.ext_sample_rate < sbr->sample_rate;
+ int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate;
int ch;
int nch = (id_aac == TYPE_CPE) ? 2 : 1;
+ int err;
+
+ if (!sbr->kx_and_m_pushed) {
+ sbr->kx[0] = sbr->kx[1];
+ sbr->m[0] = sbr->m[1];
+ } else {
+ sbr->kx_and_m_pushed = 0;
+ }
if (sbr->start) {
sbr_dequant(sbr, id_aac);
(float*)sbr->qmf_filter_scratch,
sbr->data[ch].W);
sbr_lf_gen(ac, sbr, sbr->X_low, sbr->data[ch].W);
+ sbr->data[ch].Ypos ^= 1;
if (sbr->start) {
sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, sbr->X_low, sbr->k[0]);
sbr_chirp(sbr, &sbr->data[ch]);
sbr->data[ch].bs_num_env);
// hf_adj
- sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
- sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]);
- sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
- sbr_hf_assemble(sbr->data[ch].Y, sbr->X_high, sbr, &sbr->data[ch],
- sbr->data[ch].e_a);
+ err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
+ if (!err) {
+ sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]);
+ sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
+ sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos],
+ sbr->X_high, sbr, &sbr->data[ch],
+ sbr->data[ch].e_a);
+ }
}
/* synthesis */
- sbr_x_gen(sbr, sbr->X[ch], sbr->X_low, sbr->data[ch].Y, ch);
+ sbr_x_gen(sbr, sbr->X[ch],
+ sbr->data[ch].Y[1-sbr->data[ch].Ypos],
+ sbr->data[ch].Y[ sbr->data[ch].Ypos],
+ sbr->X_low, ch);
}
- if (ac->m4ac.ps == 1) {
+ if (ac->oc[1].m4ac.ps == 1) {
if (sbr->ps.start) {
ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]);
} else {
projects / ffmpeg / blobdiff