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Promoted plugin helpers to general use

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This commit is contained in:
Abramo Bagnara 2001-01-26 09:56:30 +00:00
parent 406587a531
commit c07201926b
9 changed files with 272 additions and 236 deletions
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53
src/pcm/pcm_adpcm.c
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@ -51,17 +51,12 @@ IMA compatability project proceedings, Vol 2, Issue 2, May 1992.
#include "pcm_local.h"
#include "pcm_plugin.h"
typedef struct {
int pred_val; /* Calculated predicted value */
int step_idx; /* Previous StepSize lookup index */
} adpcm_state_t;
typedef void (*adpcm_f)(const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getputidx,
adpcm_state_t *states);
snd_pcm_adpcm_state_t *states);
typedef struct {
/* This field need to be the first */
@ -69,7 +64,7 @@ typedef struct {
int getput_idx;
adpcm_f func;
int sformat;
adpcm_state_t *states;
snd_pcm_adpcm_state_t *states;
} snd_pcm_adpcm_t;
/* First table lookup for Ima-ADPCM quantizer */
@ -88,7 +83,7 @@ static short StepSize[89] = {
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
static char adpcm_encoder(int sl, adpcm_state_t * state)
static char adpcm_encoder(int sl, snd_pcm_adpcm_state_t * state)
{
short diff; /* Difference between sl and predicted sample */
short pred_diff; /* Predicted difference to next sample */
@ -149,7 +144,7 @@ static char adpcm_encoder(int sl, adpcm_state_t * state)
}
static int adpcm_decoder(unsigned char code, adpcm_state_t * state)
static int adpcm_decoder(unsigned char code, snd_pcm_adpcm_state_t * state)
{
short pred_diff; /* Predicted difference to next sample */
short step; /* holds previous StepSize value */
@ -195,12 +190,12 @@ static int adpcm_decoder(unsigned char code, adpcm_state_t * state)
return (state->pred_val);
}
static void adpcm_decode(const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int putidx,
adpcm_state_t *states)
void snd_pcm_adpcm_decode(const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int putidx,
snd_pcm_adpcm_state_t *states)
{
#define PUT16_LABELS
#include "plugin_ops.h"
@ -256,12 +251,12 @@ static void adpcm_decode(const snd_pcm_channel_area_t *src_areas,
}
}
static void adpcm_encode(const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getidx,
adpcm_state_t *states)
void snd_pcm_adpcm_encode(const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getidx,
snd_pcm_adpcm_state_t *states)
{
#define GET16_LABELS
#include "plugin_ops.h"
@ -422,19 +417,19 @@ static int snd_pcm_adpcm_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
if (adpcm->sformat == SND_PCM_FORMAT_IMA_ADPCM) {
adpcm->getput_idx = get_index(snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0), SND_PCM_FORMAT_S16);
adpcm->func = adpcm_encode;
adpcm->getput_idx = snd_pcm_linear_get_index(snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0), SND_PCM_FORMAT_S16);
adpcm->func = snd_pcm_adpcm_encode;
} else {
adpcm->getput_idx = put_index(SND_PCM_FORMAT_S16, adpcm->sformat);
adpcm->func = adpcm_decode;
adpcm->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S16, adpcm->sformat);
adpcm->func = snd_pcm_adpcm_decode;
}
} else {
if (adpcm->sformat == SND_PCM_FORMAT_IMA_ADPCM) {
adpcm->getput_idx = put_index(SND_PCM_FORMAT_S16, snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0));
adpcm->func = adpcm_decode;
adpcm->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S16, snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0));
adpcm->func = snd_pcm_adpcm_decode;
} else {
adpcm->getput_idx = get_index(adpcm->sformat, SND_PCM_FORMAT_S16);
adpcm->func = adpcm_encode;
adpcm->getput_idx = snd_pcm_linear_get_index(adpcm->sformat, SND_PCM_FORMAT_S16);
adpcm->func = snd_pcm_adpcm_encode;
}
}
assert(!adpcm->states);