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qsound clipping fix from MAME

This commit is contained in:
Ian Karlsson 2022-02-23 23:51:34 +01:00
parent 3804e45042
commit a92c29bbdb
2 changed files with 10 additions and 8 deletions
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14
src/engine/platform/sound/qsound.c
View File

@ -162,7 +162,7 @@ void qsound_reset(struct qsound_chip *chip)
chip->state_counter = 0;
}
uint8_t qsound_stream_update(struct qsound_chip *chip, int16_t **outputs, int samples)
void qsound_stream_update(struct qsound_chip *chip, int16_t **outputs, int samples)
{
// Clear the buffers
memset(outputs[0], 0, samples * sizeof(*outputs[0]));
@ -174,10 +174,9 @@ uint8_t qsound_stream_update(struct qsound_chip *chip, int16_t **outputs, int sa
outputs[0][i] = chip->out[0];
outputs[1][i] = chip->out[1];
}
return 0;
}
uint8_t qsound_w(struct qsound_chip *chip, uint8_t offset, uint8_t data)
void qsound_w(struct qsound_chip *chip, uint8_t offset, uint8_t data)
{
switch (offset)
{
@ -193,7 +192,6 @@ uint8_t qsound_w(struct qsound_chip *chip, uint8_t offset, uint8_t data)
default:
break;
}
return 0;
}
uint8_t qsound_r(struct qsound_chip *chip)
@ -614,10 +612,14 @@ static void state_normal_update(struct qsound_chip *chip)
pan_index = 97;
// Apply different volume tables on the dry and wet inputs.
dry -= (chip->voice_output[v] * chip->pan_tables[ch][PANTBL_DRY][pan_index])<<2;
wet -= (chip->voice_output[v] * chip->pan_tables[ch][PANTBL_WET][pan_index])<<2;
dry -= (chip->voice_output[v] * chip->pan_tables[ch][PANTBL_DRY][pan_index]);
wet -= (chip->voice_output[v] * chip->pan_tables[ch][PANTBL_WET][pan_index]);
}
// Saturate accumulated voices
dry = CLAMP(dry, -0x1fffffff, 0x1fffffff) << 2;
wet = CLAMP(wet, -0x1fffffff, 0x1fffffff) << 2;
// Apply FIR filter on 'wet' input
wet = fir(&chip->filter[ch], wet >> 16);

4
src/engine/platform/sound/qsound.h
View File

@ -109,8 +109,8 @@ long qsound_start(struct qsound_chip *chip, int clock);
void qsound_reset(struct qsound_chip *chip);
void qsound_update(struct qsound_chip *chip);
uint8_t qsound_stream_update(struct qsound_chip *chip, int16_t **outputs, int samples);
uint8_t qsound_w(struct qsound_chip *chip, uint8_t offset, uint8_t data);
void qsound_stream_update(struct qsound_chip *chip, int16_t **outputs, int samples);
void qsound_w(struct qsound_chip *chip, uint8_t offset, uint8_t data);
uint8_t qsound_r(struct qsound_chip *chip);
void qsound_write_data(struct qsound_chip *chip, uint8_t address, uint16_t data);
uint16_t qsound_read_data(struct qsound_chip *chip, uint8_t address);