RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-01-08 00:00:49 +00:00
Code Issues Projects Releases Wiki Activity

High-pass filter

Browse Source
This commit is contained in:
Vladimir Voroshilov 2009-06-05 02:05:57 +07:00 committed by Michael Niedermayer
parent e610c5f383
commit c458bff934
1 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
libavcodec/g729dec.c
View File

@ -135,6 +135,12 @@ typedef struct {
int16_t was_periodic; ///< whether previous frame was declared as periodic or not (4.4)
uint16_t rand_value; ///< random number generator value (4.4.4)
int ma_predictor_prev; ///< switched MA predictor of LSP quantizer from last good frame
/// (14.14) high-pass filter data (past input)
int hpf_f[2];
/// high-pass filter data (past output)
int16_t hpf_z[2];
} G729Context;
static const G729FormatDescription format_g729_8k = {
@ -577,9 +583,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
memcpy(synth, ctx->syn_filter_data, 10 * sizeof(int16_t));
/* Temporary synth buffer is required since filter needs additional space at top of buffer and, thus,
synthesis can not be done directly to output buffer. This buffer will be reused by future
postprocessing filters. */
if (ff_celp_lp_synthesis_filter(
synth+10,
&lp[i][1],
@ -627,8 +630,13 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
else
ctx->pitch_delay_int_prev = pitch_delay_int;
/* Dumb. Will be replaced by high-pass filter */
memcpy(out_frame + i * SUBFRAME_SIZE, synth + 10, SUBFRAME_SIZE * sizeof(int16_t));
memcpy(synth+8, ctx->hpf_z, 2*sizeof(int16_t));
ff_acelp_high_pass_filter(
out_frame + i*SUBFRAME_SIZE,
ctx->hpf_f,
synth+10,
SUBFRAME_SIZE);
memcpy(ctx->hpf_z, synth+8+SUBFRAME_SIZE, 2*sizeof(int16_t));
}
ctx->was_periodic = is_periodic;