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avcodec/mlpenc: export lpc_coeff_precision option 

Change default precision from 11 to 15, improves compression.
This commit is contained in:
Paul B Mahol 2023-10-10 13:44:03 +02:00
parent 33f058f2ec
commit 44dc42e4ac
1 changed files with 5 additions and 3 deletions
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8
libavcodec/mlpenc.c
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@ -127,6 +127,7 @@ typedef struct MLPEncodeContext {
int max_restart_interval; ///< Max interval of access units in between two major frames.
int min_restart_interval; ///< Min interval of access units in between two major frames.
int lpc_coeff_precision;
int lpc_type;
int lpc_passes;
int prediction_order;
@ -243,7 +244,7 @@ static int compare_filter_params(const ChannelParams *prev_cp, const ChannelPara
if (prev->order != fp->order)
return 1;
if (!prev->order)
if (!fp->order)
return 0;
if (prev->shift != fp->shift)
@ -266,7 +267,7 @@ static int compare_matrix_params(MLPEncodeContext *ctx, const MatrixParams *prev
if (prev->count != mp->count)
return 1;
if (!prev->count)
if (!mp->count)
return 0;
for (unsigned int channel = rh->min_channel; channel <= rh->max_channel; channel++)
@ -1293,7 +1294,7 @@ static void set_filter_params(MLPEncodeContext *ctx,
order = ff_lpc_calc_coefs(&ctx->lpc_ctx, ctx->lpc_sample_buffer,
ctx->number_of_samples, MLP_MIN_LPC_ORDER,
max_order, 11, coefs, shift, ctx->lpc_type, ctx->lpc_passes,
max_order, ctx->lpc_coeff_precision, coefs, shift, ctx->lpc_type, ctx->lpc_passes,
ctx->prediction_order, MLP_MIN_LPC_SHIFT,
MLP_MAX_LPC_SHIFT, MLP_MIN_LPC_SHIFT);
@ -2160,6 +2161,7 @@ static av_cold int mlp_encode_close(AVCodecContext *avctx)
#define OFFSET(x) offsetof(MLPEncodeContext, x)
static const AVOption mlp_options[] = {
{ "max_interval", "Max number of frames between each new header", OFFSET(max_restart_interval), AV_OPT_TYPE_INT, {.i64 = 16 }, MIN_HEADER_INTERVAL, MAX_HEADER_INTERVAL, FLAGS },
{ "lpc_coeff_precision", "LPC coefficient precision", OFFSET(lpc_coeff_precision), AV_OPT_TYPE_INT, {.i64 = 15 }, 0, 15, FLAGS },
{ "lpc_type", "LPC algorithm", OFFSET(lpc_type), AV_OPT_TYPE_INT, {.i64 = FF_LPC_TYPE_LEVINSON }, FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_CHOLESKY, FLAGS, "lpc_type" },
{ "levinson", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_LEVINSON }, 0, 0, FLAGS, "lpc_type" },
{ "cholesky", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_CHOLESKY }, 0, 0, FLAGS, "lpc_type" },