Hi Fred,
> sbc/sbc.c | 16 ++++++++++++++++
> sbc/sbc.h | 3 +++
> 2 files changed, 19 insertions(+)
>
> diff --git a/sbc/sbc.c b/sbc/sbc.c
> index 6fff132..c40aa15 100644
> --- a/sbc/sbc.c
> +++ b/sbc/sbc.c
> @@ -52,6 +52,9 @@
>
> #define SBC_SYNCWORD 0x9C
>
> +#define MSBC_SYNCWORD 0xAD
> +#define MSBC_BLOCKS 15
> +
> /* This structure contains an unpacked SBC frame.
> Yes, there is probably quite some unused space herein */
> struct sbc_frame {
> @@ -920,6 +923,7 @@ struct sbc_priv {
>
> static void sbc_set_defaults(sbc_t *sbc, unsigned long flags)
> {
> + sbc->flags = flags;
> sbc->frequency = SBC_FREQ_44100;
> sbc->mode = SBC_MODE_STEREO;
> sbc->subbands = SBC_SB_8;
> @@ -982,6 +986,8 @@ SBC_EXPORT ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
> sbc->mode = priv->frame.mode;
> sbc->subbands = priv->frame.subband_mode;
> sbc->blocks = priv->frame.block_mode;
> + if (sbc->flags & SBC_MSBC)
> + sbc->blocks = MSBC_BLOCKS;
Why are we doing this for every single call of sbc_decode.
And even we wanted to do that, why do we first assign it to
priv->frame.block_mode so we overwrite it one line later.
> sbc->allocation = priv->frame.allocation;
> sbc->bitpool = priv->frame.bitpool;
>
> @@ -1056,6 +1062,8 @@ SBC_EXPORT ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
> priv->frame.subbands = sbc->subbands ? 8 : 4;
> priv->frame.block_mode = sbc->blocks;
> priv->frame.blocks = 4 + (sbc->blocks * 4);
> + if (sbc->flags & SBC_MSBC)
> + priv->frame.blocks = MSBC_BLOCKS;
Same here.
> priv->frame.bitpool = sbc->bitpool;
> priv->frame.codesize = sbc_get_codesize(sbc);
> priv->frame.length = sbc_get_frame_length(sbc);
> @@ -1140,6 +1148,8 @@ SBC_EXPORT size_t sbc_get_frame_length(sbc_t *sbc)
>
> subbands = sbc->subbands ? 8 : 4;
> blocks = 4 + (sbc->blocks * 4);
> + if (sbc->flags & SBC_MSBC)
> + blocks = MSBC_BLOCKS;
And here again.
> channels = sbc->mode == SBC_MODE_MONO ? 1 : 2;
> joint = sbc->mode == SBC_MODE_JOINT_STEREO ? 1 : 0;
> bitpool = sbc->bitpool;
> @@ -1169,6 +1179,9 @@ SBC_EXPORT unsigned sbc_get_frame_duration(sbc_t *sbc)
> blocks = priv->frame.blocks;
> }
>
> + if (sbc->flags & SBC_MSBC)
> + blocks = MSBC_BLOCKS;
> +
> switch (sbc->frequency) {
> case SBC_FREQ_16000:
> frequency = 16000;
> @@ -1208,6 +1221,9 @@ SBC_EXPORT size_t sbc_get_codesize(sbc_t *sbc)
> channels = priv->frame.channels;
> }
>
> + if (sbc->flags & SBC_MSBC)
> + blocks = MSBC_BLOCKS;
> +
> return subbands * blocks * channels * 2;
> }
>
> diff --git a/sbc/sbc.h b/sbc/sbc.h
> index bbd45da..3511119 100644
> --- a/sbc/sbc.h
> +++ b/sbc/sbc.h
> @@ -64,6 +64,9 @@ extern "C" {
> #define SBC_LE 0x00
> #define SBC_BE 0x01
>
> +/* Additional features */
> +#define SBC_MSBC 0x01
> +
> struct sbc_struct {
> unsigned long flags;
>
I think you get the idea. Just corrected an already assigned value in
case of mSBC is a bad idea. It is either an if clause or we assign the
proper value once in the private structure.
Regards
Marcel
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