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path: root/servers/audio/audio_mixer_sw.cpp
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Diffstat (limited to 'servers/audio/audio_mixer_sw.cpp')
-rw-r--r--servers/audio/audio_mixer_sw.cpp125
1 files changed, 72 insertions, 53 deletions
diff --git a/servers/audio/audio_mixer_sw.cpp b/servers/audio/audio_mixer_sw.cpp
index 791f31719e..033cd333d5 100644
--- a/servers/audio/audio_mixer_sw.cpp
+++ b/servers/audio/audio_mixer_sw.cpp
@@ -45,14 +45,14 @@ void AudioMixerSW::do_resample(const Depth* p_src, int32_t *p_dst, ResamplerStat
while (p_state->amount--) {
int32_t pos=p_state->pos >> MIX_FRAC_BITS;
- if (is_stereo)
+ if (is_stereo && !is_ima_adpcm)
pos<<=1;
if (is_ima_adpcm) {
- int sample_pos = pos + p_state->ima_adpcm->window_ofs;
+ int sample_pos = pos + p_state->ima_adpcm[0].window_ofs;
- while(sample_pos>p_state->ima_adpcm->last_nibble) {
+ while(sample_pos>p_state->ima_adpcm[0].last_nibble) {
static const int16_t _ima_adpcm_step_table[89] = {
@@ -72,52 +72,64 @@ void AudioMixerSW::do_resample(const Depth* p_src, int32_t *p_dst, ResamplerStat
-1, -1, -1, -1, 2, 4, 6, 8
};
- int16_t nibble,signed_nibble,diff,step;
+ for(int i=0;i<(is_stereo?2:1);i++) {
- p_state->ima_adpcm->last_nibble++;
- const uint8_t *src_ptr=p_state->ima_adpcm->ptr;
- nibble = (p_state->ima_adpcm->last_nibble&1)?
- (src_ptr[p_state->ima_adpcm->last_nibble>>1]>>4):(src_ptr[p_state->ima_adpcm->last_nibble>>1]&0xF);
- step=_ima_adpcm_step_table[p_state->ima_adpcm->step_index];
+ int16_t nibble,signed_nibble,diff,step;
- p_state->ima_adpcm->step_index += _ima_adpcm_index_table[nibble];
- if (p_state->ima_adpcm->step_index<0)
- p_state->ima_adpcm->step_index=0;
- if (p_state->ima_adpcm->step_index>88)
- p_state->ima_adpcm->step_index=88;
+ p_state->ima_adpcm[i].last_nibble++;
+ const uint8_t *src_ptr=p_state->ima_adpcm[i].ptr;
- /*
- signed_nibble = (nibble&7) * ((nibble&8)?-1:1);
- diff = (2 * signed_nibble + 1) * step / 4; */
- diff = step >> 3 ;
- if (nibble & 1)
- diff += step >> 2 ;
- if (nibble & 2)
- diff += step >> 1 ;
- if (nibble & 4)
- diff += step ;
- if (nibble & 8)
- diff = -diff ;
+ uint8_t nbb = src_ptr[ (p_state->ima_adpcm[i].last_nibble>>1) * (is_stereo?2:1) + i ];
+ nibble = (p_state->ima_adpcm[i].last_nibble&1)?(nbb>>4):(nbb&0xF);
+ step=_ima_adpcm_step_table[p_state->ima_adpcm[i].step_index];
- p_state->ima_adpcm->predictor+=diff;
- if (p_state->ima_adpcm->predictor<-0x8000)
- p_state->ima_adpcm->predictor=-0x8000;
- else if (p_state->ima_adpcm->predictor>0x7FFF)
- p_state->ima_adpcm->predictor=0x7FFF;
+ p_state->ima_adpcm[i].step_index += _ima_adpcm_index_table[nibble];
+ if (p_state->ima_adpcm[i].step_index<0)
+ p_state->ima_adpcm[i].step_index=0;
+ if (p_state->ima_adpcm[i].step_index>88)
+ p_state->ima_adpcm[i].step_index=88;
- /* store loop if there */
- if (p_state->ima_adpcm->last_nibble==p_state->ima_adpcm->loop_pos) {
+ /*
+ signed_nibble = (nibble&7) * ((nibble&8)?-1:1);
+ diff = (2 * signed_nibble + 1) * step / 4; */
+
+ diff = step >> 3 ;
+ if (nibble & 1)
+ diff += step >> 2 ;
+ if (nibble & 2)
+ diff += step >> 1 ;
+ if (nibble & 4)
+ diff += step ;
+ if (nibble & 8)
+ diff = -diff ;
+
+ p_state->ima_adpcm[i].predictor+=diff;
+ if (p_state->ima_adpcm[i].predictor<-0x8000)
+ p_state->ima_adpcm[i].predictor=-0x8000;
+ else if (p_state->ima_adpcm[i].predictor>0x7FFF)
+ p_state->ima_adpcm[i].predictor=0x7FFF;
+
+
+ /* store loop if there */
+ if (p_state->ima_adpcm[i].last_nibble==p_state->ima_adpcm[i].loop_pos) {
+
+ p_state->ima_adpcm[i].loop_step_index = p_state->ima_adpcm[i].step_index;
+ p_state->ima_adpcm[i].loop_predictor = p_state->ima_adpcm[i].predictor;
+ }
+
+ //printf("%i - %i - pred %i\n",int(p_state->ima_adpcm[i].last_nibble),int(nibble),int(p_state->ima_adpcm[i].predictor));
- p_state->ima_adpcm->loop_step_index = p_state->ima_adpcm->step_index;
- p_state->ima_adpcm->loop_predictor = p_state->ima_adpcm->predictor;
}
}
- final=p_state->ima_adpcm->predictor;
+ final=p_state->ima_adpcm[0].predictor;
+ if (is_stereo) {
+ final_r=p_state->ima_adpcm[1].predictor;
+ }
} else {
final=p_src[pos];
@@ -399,9 +411,10 @@ void AudioMixerSW::mix_channel(Channel& c) {
if (format==AS::SAMPLE_FORMAT_IMA_ADPCM) {
- rstate.ima_adpcm=&c.mix.ima_adpcm;
+ rstate.ima_adpcm=c.mix.ima_adpcm;
if (loop_format!=AS::SAMPLE_LOOP_NONE) {
- c.mix.ima_adpcm.loop_pos=loop_begin_fp>>MIX_FRAC_BITS;
+ c.mix.ima_adpcm[0].loop_pos=loop_begin_fp>>MIX_FRAC_BITS;
+ c.mix.ima_adpcm[1].loop_pos=loop_begin_fp>>MIX_FRAC_BITS;
loop_format=AS::SAMPLE_LOOP_FORWARD;
}
}
@@ -447,9 +460,11 @@ void AudioMixerSW::mix_channel(Channel& c) {
/* go to loop-begin */
if (format==AS::SAMPLE_FORMAT_IMA_ADPCM) {
- c.mix.ima_adpcm.step_index=c.mix.ima_adpcm.loop_step_index;
- c.mix.ima_adpcm.predictor=c.mix.ima_adpcm.loop_predictor;
- c.mix.ima_adpcm.last_nibble=loop_begin_fp>>MIX_FRAC_BITS;
+ for(int i=0;i<2;i++) {
+ c.mix.ima_adpcm[i].step_index=c.mix.ima_adpcm[i].loop_step_index;
+ c.mix.ima_adpcm[i].predictor=c.mix.ima_adpcm[i].loop_predictor;
+ c.mix.ima_adpcm[i].last_nibble=loop_begin_fp>>MIX_FRAC_BITS;
+ }
c.mix.offset=loop_begin_fp;
} else {
c.mix.offset=loop_begin_fp+(c.mix.offset-loop_end_fp);
@@ -549,10 +564,12 @@ void AudioMixerSW::mix_channel(Channel& c) {
CALL_RESAMPLE_MODE(int16_t,is_stereo,false,use_filter,use_fx,interpolation_type,mix_channels);
} else if (format==AS::SAMPLE_FORMAT_IMA_ADPCM) {
- c.mix.ima_adpcm.window_ofs=c.mix.offset>>MIX_FRAC_BITS;
- c.mix.ima_adpcm.ptr=(const uint8_t*)data;
- int8_t *src_ptr = &((int8_t*)data)[(c.mix.offset >> MIX_FRAC_BITS)<<(is_stereo?1:0) ];
- CALL_RESAMPLE_MODE(int8_t,false,true,use_filter,use_fx,interpolation_type,mix_channels);
+ for(int i=0;i<2;i++) {
+ c.mix.ima_adpcm[i].window_ofs=c.mix.offset>>MIX_FRAC_BITS;
+ c.mix.ima_adpcm[i].ptr=(const uint8_t*)data;
+ }
+ int8_t *src_ptr = NULL;
+ CALL_RESAMPLE_MODE(int8_t,is_stereo,true,use_filter,use_fx,interpolation_type,mix_channels);
}
@@ -781,14 +798,16 @@ AudioMixer::ChannelID AudioMixerSW::channel_alloc(RID p_sample) {
if (sample_manager->sample_get_format(c.sample)==AudioServer::SAMPLE_FORMAT_IMA_ADPCM) {
- c.mix.ima_adpcm.step_index=0;
- c.mix.ima_adpcm.predictor=0;
- c.mix.ima_adpcm.loop_step_index=0;
- c.mix.ima_adpcm.loop_predictor=0;
- c.mix.ima_adpcm.last_nibble=-1;
- c.mix.ima_adpcm.loop_pos=0x7FFFFFFF;
- c.mix.ima_adpcm.window_ofs=0;
- c.mix.ima_adpcm.ptr=NULL;
+ for(int i=0;i<2;i++) {
+ c.mix.ima_adpcm[i].step_index=0;
+ c.mix.ima_adpcm[i].predictor=0;
+ c.mix.ima_adpcm[i].loop_step_index=0;
+ c.mix.ima_adpcm[i].loop_predictor=0;
+ c.mix.ima_adpcm[i].last_nibble=-1;
+ c.mix.ima_adpcm[i].loop_pos=0x7FFFFFFF;
+ c.mix.ima_adpcm[i].window_ofs=0;
+ c.mix.ima_adpcm[i].ptr=NULL;
+ }
}
ChannelID ret_id = index+c.check*MAX_CHANNELS;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 16:51:13 +0000