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30 #define ORDER_METHOD_EST 0
31 #define ORDER_METHOD_2LEVEL 1
32 #define ORDER_METHOD_4LEVEL 2
33 #define ORDER_METHOD_8LEVEL 3
34 #define ORDER_METHOD_SEARCH 4
35 #define ORDER_METHOD_LOG 5
37 #define MIN_LPC_ORDER 1
38 #define MAX_LPC_ORDER 32
95 int max_order,
int precision,
98 int omethod,
int min_shift,
int max_shift,
int zero_shift);
104 int order,
double *
ref);
122 #ifdef LPC_USE_DOUBLE
142 for (
i = 0;
i < max_order;
i++)
143 gen0[
i] = gen1[
i] = autoc[
i + 1];
146 ref[0] = -gen1[0] / err;
147 err += gen1[0] *
ref[0];
150 for (
i = 1;
i < max_order;
i++) {
151 for (j = 0; j < max_order -
i; j++) {
152 gen1[j] = gen1[j + 1] +
ref[
i - 1] * gen0[j];
153 gen0[j] = gen1[j + 1] *
ref[
i - 1] + gen0[j];
155 ref[
i] = -gen1[0] / err;
156 err += gen1[0] *
ref[
i];
179 if (
fail && (autoc[max_order - 1] == 0 || err <= 0))
182 for(
i=0;
i<max_order;
i++) {
187 r -= lpc_last[j] * autoc[
i-j-1];
190 err *=
FIXR(1.0) - (
r *
r);
195 for(j=0; j < (
i+1)>>1; j++) {
static void error(const char *err)
Linear least squares model.
FFLPCType
LPC analysis type.
void ff_lpc_end(LPCContext *s)
Uninitialize LPCContext.
@ FF_LPC_TYPE_CHOLESKY
Cholesky factorization.
static int AAC_RENAME() compute_lpc_coefs(const LPC_TYPE *autoc, int max_order, LPC_TYPE *lpc, int lpc_stride, int fail, int normalize)
Levinson-Durbin recursion.
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new samples
int ff_lpc_init(LPCContext *s, int blocksize, int max_order, enum FFLPCType lpc_type)
Initialize LPCContext.
void(* lpc_apply_welch_window)(const int32_t *data, int len, double *w_data)
Apply a Welch window to an array of input samples.
@ FF_LPC_TYPE_DEFAULT
use the codec default LPC type
double ff_lpc_calc_ref_coefs_f(LPCContext *s, const float *samples, int len, int order, double *ref)
int ff_lpc_calc_ref_coefs(LPCContext *s, const int32_t *samples, int order, double *ref)
void(* lpc_compute_autocorr)(const double *data, int len, int lag, double *autoc)
Perform autocorrelation on input samples with delay of 0 to lag.
int ff_lpc_calc_coefs(LPCContext *s, const int32_t *samples, int blocksize, int min_order, int max_order, int precision, int32_t coefs[][MAX_LPC_ORDER], int *shift, enum FFLPCType lpc_type, int lpc_passes, int omethod, int min_shift, int max_shift, int zero_shift)
Calculate LPC coefficients for multiple orders.
@ FF_LPC_TYPE_NB
Not part of ABI.
void ff_lpc_init_x86(LPCContext *s)
double * windowed_samples
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
#define i(width, name, range_min, range_max)
static void compute_ref_coefs(const LPC_TYPE *autoc, int max_order, LPC_TYPE *ref, LPC_TYPE *error)
Schur recursion.
static void normalize(NormalizeContext *s, AVFrame *in, AVFrame *out)
typedef void(RENAME(mix_any_func_type))
static int ref[MAX_W *MAX_W]
static int shift(int a, int b)
@ FF_LPC_TYPE_NONE
do not use LPC prediction or use all zero coefficients
@ FF_LPC_TYPE_LEVINSON
Levinson-Durbin recursion.
@ FF_LPC_TYPE_FIXED
fixed LPC coefficients