Return-Path: From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Dalleau?= To: linux-bluetooth@vger.kernel.org Cc: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Dalleau?= Subject: [PATCH v6 02/17] sbc: Break 4 blocks processing to variable steps Date: Wed, 6 Mar 2013 11:19:08 +0100 Message-Id: <1362565163-3567-3-git-send-email-frederic.dalleau@linux.intel.com> In-Reply-To: <1362565163-3567-1-git-send-email-frederic.dalleau@linux.intel.com> References: <1362565163-3567-1-git-send-email-frederic.dalleau@linux.intel.com> Content-Type: text/plain; charset="utf-8" Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Until now SBC processed 4 blocks at a time. If we want to process 15 blocks, then we need to break this processing in one block steps. 4 blocks is still default increment. --- sbc/sbc.c | 19 +++++++++++-------- sbc/sbc_primitives.h | 6 ++++-- 2 files changed, 15 insertions(+), 10 deletions(-) diff --git a/sbc/sbc.c b/sbc/sbc.c index e51ed57..4a7dd2e 100644 --- a/sbc/sbc.c +++ b/sbc/sbc.c @@ -688,30 +688,32 @@ static int sbc_analyze_audio(struct sbc_encoder_state *state, switch (frame->subbands) { case 4: for (ch = 0; ch < frame->channels; ch++) { - x = &state->X[ch][state->position - 16 + - frame->blocks * 4]; - for (blk = 0; blk < frame->blocks; blk += 4) { + x = &state->X[ch][state->position - 4 * + state->increment + frame->blocks * 4]; + for (blk = 0; blk < frame->blocks; + blk += state->increment) { state->sbc_analyze_4b_4s( state, x, frame->sb_sample_f[blk][ch], frame->sb_sample_f[blk + 1][ch] - frame->sb_sample_f[blk][ch]); - x -= 16; + x -= 4 * state->increment; } } return frame->blocks * 4; case 8: for (ch = 0; ch < frame->channels; ch++) { - x = &state->X[ch][state->position - 32 + - frame->blocks * 8]; - for (blk = 0; blk < frame->blocks; blk += 4) { + x = &state->X[ch][state->position - 8 * + state->increment + frame->blocks * 8]; + for (blk = 0; blk < frame->blocks; + blk += state->increment) { state->sbc_analyze_4b_8s( state, x, frame->sb_sample_f[blk][ch], frame->sb_sample_f[blk + 1][ch] - frame->sb_sample_f[blk][ch]); - x -= 32; + x -= 8 * state->increment; } } return frame->blocks * 8; @@ -906,6 +908,7 @@ static void sbc_encoder_init(struct sbc_encoder_state *state, { memset(&state->X, 0, sizeof(state->X)); state->position = (SBC_X_BUFFER_SIZE - frame->subbands * 9) & ~7; + state->increment = 4; sbc_init_primitives(state); } diff --git a/sbc/sbc_primitives.h b/sbc/sbc_primitives.h index a7bbef1..2a7d4a1 100644 --- a/sbc/sbc_primitives.h +++ b/sbc/sbc_primitives.h @@ -38,13 +38,15 @@ struct sbc_encoder_state { int position; + /* Number of consecutive blocks handled by the encoder */ + int increment; int16_t SBC_ALIGNED X[2][SBC_X_BUFFER_SIZE]; /* Polyphase analysis filter for 4 subbands configuration, - * it handles 4 blocks at once */ + * it handles "increment" blocks at once */ void (*sbc_analyze_4b_4s)(struct sbc_encoder_state *state, int16_t *x, int32_t *out, int out_stride); /* Polyphase analysis filter for 8 subbands configuration, - * it handles 4 blocks at once */ + * it handles "increment" blocks at once */ void (*sbc_analyze_4b_8s)(struct sbc_encoder_state *state, int16_t *x, int32_t *out, int out_stride); /* Process input data (deinterleave, endian conversion, reordering), -- 1.7.9.5