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;
if(sbr->mdct.mdct_bits)
return;
- 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;
}
break;
default:
- av_log_missing_feature(ac->avctx, "Reserved SBR extensions are", 1);
+ // some files contain 0-padding
+ if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left))
+ av_log_missing_feature(ac->avctx, "Reserved SBR extensions are", 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
/** 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;
- av_assert0(sbr->kx[1] <= table[0]);
+ 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)
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->data[ch].Ypos ^= 1;
- sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos],
- 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_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