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Code Issues Releases Activity

Split input/output data arguments to ff_acelp_apply_order_2_transfer_function().

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Originally committed as revision 22933 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2010-04-21 17:45:24 +00:00
parent bb2dd9efd8
commit 8955a9d79c
4 changed files with 9 additions and 8 deletions
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6
libavcodec/acelp_filters.c
View File

@ -114,7 +114,7 @@ void ff_acelp_high_pass_filter(int16_t* out, int hpf_f[2],
}
}
void ff_acelp_apply_order_2_transfer_function(float *buf,
void ff_acelp_apply_order_2_transfer_function(float *out, const float *in,
const float zero_coeffs[2],
const float pole_coeffs[2],
float gain, float mem[2], int n)
@ -123,8 +123,8 @@ void ff_acelp_apply_order_2_transfer_function(float *buf,
float tmp;
for (i = 0; i < n; i++) {
tmp = gain * buf[i] - pole_coeffs[0] * mem[0] - pole_coeffs[1] * mem[1];
buf[i] = tmp + zero_coeffs[0] * mem[0] + zero_coeffs[1] * mem[1];
tmp = gain * in[i] - pole_coeffs[0] * mem[0] - pole_coeffs[1] * mem[1];
out[i] = tmp + zero_coeffs[0] * mem[0] + zero_coeffs[1] * mem[1];
mem[1] = mem[0];
mem[0] = tmp;

5
libavcodec/acelp_filters.h
View File

@ -92,14 +92,15 @@ void ff_acelp_high_pass_filter(int16_t* out, int hpf_f[2],
/**
* Apply an order 2 rational transfer function in-place.
*
* @param samples [in/out]
* @param out output buffer for filtered speech samples
* @param in input buffer containing speech data (may be the same as out)
* @param zero_coeffs z^-1 and z^-2 coefficients of the numerator
* @param pole_coeffs z^-1 and z^-2 coefficients of the denominator
* @param gain scale factor for final output
* @param mem intermediate values used by filter (should be 0 initially)
* @param n number of samples
*/
void ff_acelp_apply_order_2_transfer_function(float *samples,
void ff_acelp_apply_order_2_transfer_function(float *out, const float *in,
const float zero_coeffs[2],
const float pole_coeffs[2],
float gain,

2
libavcodec/amrnbdec.c
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@ -1044,7 +1044,7 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
update_state(p);
}
ff_acelp_apply_order_2_transfer_function(buf_out, highpass_zeros,
ff_acelp_apply_order_2_transfer_function(buf_out, buf_out, highpass_zeros,
highpass_poles, highpass_gain,
p->high_pass_mem, AMR_BLOCK_SIZE);

4
libavcodec/sipr.c
View File

@ -490,14 +490,14 @@ static void decode_frame(SiprContext *ctx, SiprParameters *params,
memcpy(ctx->excitation, excitation - PITCH_DELAY_MAX - L_INTERPOL,
(PITCH_DELAY_MAX + L_INTERPOL) * sizeof(float));
ff_acelp_apply_order_2_transfer_function(synth,
ff_acelp_apply_order_2_transfer_function(out_data, synth,
(const float[2]) {-1.99997 , 1.000000000},
(const float[2]) {-1.93307352, 0.935891986},
0.939805806,
ctx->highpass_filt_mem,
frame_size);
ctx->dsp.vector_clipf(out_data, synth, -1, 32767./(1<<15), frame_size);
ctx->dsp.vector_clipf(out_data, out_data, -1, 32767./(1<<15), frame_size);
}