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aacsbr: don't call sbr_dequant twice without intermediate read_sbr_data

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Doing that doesn't make sense, because the only purpose of sbr_dequant
is to process the data from read_sbr_data.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-11-20 20:15:21 +01:00
parent b885d9ced5
commit 1c3e43a627
2 changed files with 11 additions and 0 deletions
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10
libavcodec/aacsbr_template.c
View File

@ -72,6 +72,7 @@ av_cold void AAC_RENAME(ff_aac_sbr_init)(void)
/** Places SBR in pure upsampling mode. */ /** Places SBR in pure upsampling mode. */
static void sbr_turnoff(SpectralBandReplication *sbr) { static void sbr_turnoff(SpectralBandReplication *sbr) {
sbr->start = 0; sbr->start = 0;
sbr->ready_for_dequant = 0;
// Init defults used in pure upsampling mode // Init defults used in pure upsampling mode
sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 sbr->kx[1] = 32; //Typo in spec, kx' inits to 32
sbr->m[1] = 0; sbr->m[1] = 0;
@ -179,6 +180,7 @@ static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext
SpectrumParameters old_spectrum_params; SpectrumParameters old_spectrum_params;
sbr->start = 1; sbr->start = 1;
sbr->ready_for_dequant = 0;
// Save last spectrum parameters variables to compare to new ones // Save last spectrum parameters variables to compare to new ones
memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters));
@ -1041,6 +1043,7 @@ static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr,
unsigned int cnt = get_bits_count(gb); unsigned int cnt = get_bits_count(gb);
sbr->id_aac = id_aac; sbr->id_aac = id_aac;
sbr->ready_for_dequant = 1;
if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) {
if (read_sbr_single_channel_element(ac, sbr, gb)) { if (read_sbr_single_channel_element(ac, sbr, gb)) {
@ -1458,6 +1461,12 @@ void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int
sbr_turnoff(sbr); sbr_turnoff(sbr);
} }
if (sbr->start && !sbr->ready_for_dequant) {
av_log(ac->avctx, AV_LOG_ERROR,
"No quantized data read for sbr_dequant.\n");
sbr_turnoff(sbr);
}
if (!sbr->kx_and_m_pushed) { if (!sbr->kx_and_m_pushed) {
sbr->kx[0] = sbr->kx[1]; sbr->kx[0] = sbr->kx[1];
sbr->m[0] = sbr->m[1]; sbr->m[0] = sbr->m[1];
@ -1467,6 +1476,7 @@ void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int
if (sbr->start) { if (sbr->start) {
sbr_dequant(sbr, id_aac); sbr_dequant(sbr, id_aac);
sbr->ready_for_dequant = 0;
} }
for (ch = 0; ch < nch; ch++) { for (ch = 0; ch < nch; ch++) {
/* decode channel */ /* decode channel */

1
libavcodec/sbr.h
View File

@ -139,6 +139,7 @@ typedef struct AACSBRContext {
struct SpectralBandReplication { struct SpectralBandReplication {
int sample_rate; int sample_rate;
int start; int start;
int ready_for_dequant;
int id_aac; int id_aac;
int reset; int reset;
SpectrumParameters spectrum_params; SpectrumParameters spectrum_params;