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| author | Alex Converse <alex.converse@gmail.com> | 2012-03-21 12:20:58 -0700 |
|---|---|---|
| committer | Alex Converse <alex.converse@gmail.com> | 2012-03-23 14:56:44 -0700 |
| commit | b00307ecd04f80d8021c50f9fa76fd452e54a3d1 (patch) | |
| tree | 8f350e7fd4cbced7062c21dbd2fee1ad3e00aa44 /libavcodec/aacsbr.c | |
| parent | 0cb93dacee45d3d767b4470e6a9b43b17e5220c4 (diff) | |
| download | ffmpeg-b00307ecd04f80d8021c50f9fa76fd452e54a3d1.tar.gz | |
aacsbr: Add a debug check to sbr_mapping.
There have been multiple bugs caused by inconsistencies here.
Based on an idea from Michael Niedermayer.
CC: libav-stable@libav.org
Diffstat (limited to 'libavcodec/aacsbr.c')
| -rw-r--r-- | libavcodec/aacsbr.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c index f39806e30f..c71cfa00e1 100644 --- a/libavcodec/aacsbr.c +++ b/libavcodec/aacsbr.c @@ -1399,7 +1399,7 @@ static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64], /** 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; @@ -1410,6 +1410,12 @@ static void sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, 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]; @@ -1444,6 +1450,7 @@ static void sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, } 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) @@ -1644,6 +1651,7 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, int downsampled = ac->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]; @@ -1670,12 +1678,14 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, 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->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 */ |