diff options
Diffstat (limited to 'sbc')
| -rw-r--r-- | sbc/Makefile.am | 3 | ||||
| -rw-r--r-- | sbc/sbc.c | 37 |
2 files changed, 14 insertions, 26 deletions
diff --git a/sbc/Makefile.am b/sbc/Makefile.am index 9079305a..afc197a0 100644 --- a/sbc/Makefile.am +++ b/sbc/Makefile.am @@ -1,4 +1,3 @@ - if SNDFILE sndfile_programs = sbctester else @@ -23,6 +22,6 @@ sbctester_LDADD = @SNDFILE_LIBS@ endif endif -AM_CFLAGS = @SNDFILE_CFLAGS@ +AM_CFLAGS = @SNDFILE_CFLAGS@ -O3 MAINTAINERCLEANFILES = Makefile.in @@ -79,7 +79,6 @@ struct sbc_frame { uint8_t scale_factor[2][8]; /* raw integer subband samples in the frame */ - uint16_t audio_sample[16][2][8]; int32_t sb_sample_f[16][2][8]; int32_t sb_sample[16][2][8]; /* modified subband samples */ @@ -372,6 +371,7 @@ static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame, int crc_pos = 0; int32_t temp; + int audio_sample; int ch, sb, blk, bit; /* channel, subband, block and bit standard counters */ int bits[2][8]; /* bits distribution */ @@ -473,28 +473,6 @@ static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame, sbc_calculate_bits(frame, bits); - for (blk = 0; blk < frame->blocks; blk++) { - for (ch = 0; ch < frame->channels; ch++) { - for (sb = 0; sb < frame->subbands; sb++) { - frame->audio_sample[blk][ch][sb] = 0; - if (bits[ch][sb] == 0) - continue; - - for (bit = 0; bit < bits[ch][sb]; bit++) { - int b; /* A bit */ - if (consumed > len * 8) - return -1; - - b = (data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01; - frame->audio_sample[blk][ch][sb] |= - b << (bits[ch][sb] - bit - 1); - - consumed++; - } - } - } - } - for (ch = 0; ch < frame->channels; ch++) { for (sb = 0; sb < frame->subbands; sb++) levels[ch][sb] = (1 << bits[ch][sb]) - 1; @@ -504,8 +482,19 @@ static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame, for (ch = 0; ch < frame->channels; ch++) { for (sb = 0; sb < frame->subbands; sb++) { if (levels[ch][sb] > 0) { + audio_sample = 0; + for (bit = 0; bit < bits[ch][sb]; bit++) { + if (consumed > len * 8) + return -1; + + if ((data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01) + audio_sample |= 1 << (bits[ch][sb] - bit - 1); + + consumed++; + } + frame->sb_sample[blk][ch][sb] = - (((frame->audio_sample[blk][ch][sb] << 1) | 1) << frame->scale_factor[ch][sb])/ + (((audio_sample << 1) | 1) << frame->scale_factor[ch][sb]) / levels[ch][sb] - (1 << frame->scale_factor[ch][sb]); } else frame->sb_sample[blk][ch][sb] = 0; |