diff options
Diffstat (limited to 'source/apu_blargg.c')
| -rw-r--r-- | source/apu_blargg.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/source/apu_blargg.c b/source/apu_blargg.c index d87d8d3..e335bbe 100644 --- a/source/apu_blargg.c +++ b/source/apu_blargg.c @@ -2891,7 +2891,6 @@ static int32_t r_left[4], r_right[4]; #define SPACE_EMPTY() (rb_buffer_size - rb_size) #define SPACE_FILLED() (rb_size) #define MAX_WRITE() (SPACE_EMPTY() >> 1) -#define AVAIL() (((((uint32_t) rb_size) << 14) - r_frac) / r_step * 2) #define RESAMPLER_MIN(a, b) ((a) < (b) ? (a) : (b)) #define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x))) @@ -2934,6 +2933,34 @@ static void resampler_time_ratio(double ratio) static void resampler_read(int16_t *data, int32_t num_samples) { + if (r_step == 65536) + { + //direct copy if we are not resampling + int bytesUntilBufferEnd = rb_buffer_size - rb_start; + while (num_samples > 0) + { + int bytesToConsume = num_samples * sizeof(int16_t); + if (bytesToConsume >= bytesUntilBufferEnd) + { + bytesToConsume = bytesUntilBufferEnd; + } + if (rb_start >= rb_buffer_size) + { + rb_start = 0; + } + memcpy(data, &rb_buffer[rb_start], bytesToConsume); + data += bytesToConsume / sizeof(int16_t); + rb_start += bytesToConsume; + rb_size -= bytesToConsume; + num_samples -= bytesToConsume / sizeof(int16_t); + if (rb_start >= rb_buffer_size) + { + rb_start = 0; + } + } + return; + } + int32_t i_position, o_position, consumed; int16_t *internal_buffer; @@ -3045,7 +3072,7 @@ static INLINE void resampler_resize (int32_t num_samples) bool S9xMixSamples (int16_t *buffer, uint32_t sample_count) { - if (AVAIL() >= (sample_count + lag)) + if (S9xGetSampleCount() >= (sample_count + lag)) { resampler_read(buffer, sample_count); if (lag == lag_master) @@ -3065,7 +3092,11 @@ bool S9xMixSamples (int16_t *buffer, uint32_t sample_count) int32_t S9xGetSampleCount() { - return AVAIL(); + if (r_step == 65536) + { + return rb_size / sizeof(int16_t); + } + return (((((uint32_t)rb_size) << 14) - r_frac) / r_step * 2); } /* Sets destination for output samples */ |