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avcodec/mlpenc: increase compression ratio even more, fix LPC parameters

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This commit is contained in:
Paul B Mahol 2023-10-02 19:29:26 +02:00
parent 0be5da9cfa
commit a1b29ab60d
1 changed files with 3 additions and 4 deletions
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7
libavcodec/mlpenc.c
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@ -41,7 +41,7 @@
#define MLP_MIN_LPC_ORDER 1 #define MLP_MIN_LPC_ORDER 1
#define MLP_MAX_LPC_ORDER 8 #define MLP_MAX_LPC_ORDER 8
#define MLP_MIN_LPC_SHIFT 8 #define MLP_MIN_LPC_SHIFT 0
#define MLP_MAX_LPC_SHIFT 15 #define MLP_MAX_LPC_SHIFT 15
typedef struct { typedef struct {
@ -1334,13 +1334,12 @@ static void set_filter_params(MLPEncodeContext *ctx,
} else if (filter == IIR) { } else if (filter == IIR) {
fp->order = 0; fp->order = 0;
} else if (filter == FIR) { } else if (filter == FIR) {
const int max_order = (ctx->substream_info & SUBSTREAM_INFO_HIGH_RATE) const int max_order = MAX_FIR_ORDER;
? 4 : MLP_MAX_LPC_ORDER;
int32_t *sample_buffer = ctx->sample_buffer + channel; int32_t *sample_buffer = ctx->sample_buffer + channel;
int32_t coefs[MAX_LPC_ORDER][MAX_LPC_ORDER]; int32_t coefs[MAX_LPC_ORDER][MAX_LPC_ORDER];
int32_t *lpc_samples = ctx->lpc_sample_buffer; int32_t *lpc_samples = ctx->lpc_sample_buffer;
int32_t *fcoeff = ctx->cur_channel_params[channel].coeff[filter]; int32_t *fcoeff = ctx->cur_channel_params[channel].coeff[filter];
int shift[MLP_MAX_LPC_ORDER]; int shift[MAX_LPC_ORDER];
int order; int order;
for (unsigned int i = 0; i < ctx->number_of_samples; i++) { for (unsigned int i = 0; i < ctx->number_of_samples; i++) {