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Resampling :D

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This commit is contained in:
Themaister 2010-05-27 00:26:11 +02:00
parent 33b2b8f96e
commit 98b6c4a4ec
2 changed files with 19 additions and 37 deletions
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2
Makefile
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@ -1,7 +1,7 @@
TARGET = ssnes
SOURCE = ssnes.c
CFLAGS = -Wall -g
CFLAGS = -Wall -O3 -march=native
OBJ = ssnes.o
SOBJ = libsnes.so

54
ssnes.c
View File

@ -14,12 +14,6 @@ static void audio_write(const void *data, size_t size);
///// samplerate
static SRC_STATE* source = NULL;
static float *src_input = NULL;
static float *src_output = NULL;
static size_t src_input_size = 0;
static size_t src_output_size = 0;
static size_t src_input_ptr = 0;
///// GL
static GLuint texture;
@ -143,10 +137,6 @@ static void init_audio(void)
src_set_ratio(source, (double)out_rate / (double)in_rate);
src_input_size = in_rate / 20;
src_output_size = out_rate / 20;
src_input = malloc ( src_input_size * sizeof(float) );
src_output = malloc ( src_output_size * sizeof(float) );
}
static void uninit_audio(void)
@ -162,25 +152,20 @@ static void uninit_audio(void)
src_delete(source);
source = NULL;
}
free (src_input); src_input = NULL;
free (src_output); src_output = NULL;
}
static void video_refresh_GL(const uint16_t* data, unsigned width, unsigned height)
{
fprintf(stderr, "#1\n");
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
fprintf(stderr, "#2\n");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
fprintf(stderr, "#3\n");
glPixelStorei(GL_UNPACK_ROW_LENGTH, width);
uint32_t output[width*height];
@ -201,10 +186,8 @@ static void video_refresh_GL(const uint16_t* data, unsigned width, unsigned heig
}
}
fprintf(stderr, "#4\n");
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, output);
fprintf(stderr, "#5\n");
glLoadIdentity();
glColor3f(1,1,1);
@ -220,38 +203,37 @@ static void video_refresh_GL(const uint16_t* data, unsigned width, unsigned heig
glEnd();
glfwSwapBuffers();
fprintf(stderr, "#6\n");
}
static void audio_refresh(uint16_t left, uint16_t right)
{
src_input[src_input_ptr++] = (float)left / 0x7FFF;
src_input[src_input_ptr++] = (float)right / 0x7FFF;
static float data[256];
static int data_ptr = 0;
SRC_DATA data;
data[data_ptr++] = (float)(*(int16_t*)&left)/0x7FFF;
data[data_ptr++] = (float)(*(int16_t*)&right)/0x7FFF;
if ( src_input_ptr == src_input_size )
if ( data_ptr == 256 )
{
data.input_frames = src_input_size;
data.output_frames = src_output_size;
data.data_in = src_input;
data.data_out = src_output;
data.src_ratio = (double)out_rate / (double)in_rate;
float outsamples[2048];
int16_t temp_outsamples[4096];
src_process(source, &data);
fprintf(stderr, "Input frames used: %ld\n"
"Output frames used: %ld\n"
, data.input_frames_used, data.output_frames_gen);
SRC_DATA src_data;
memmove(src_input, src_input + data.input_frames_used, (src_input_size - data.input_frames_used) * sizeof(float));
src_data.data_in = data;
src_data.data_out = outsamples;
src_data.input_frames = 128;
src_data.output_frames = 1024;
src_data.end_of_input = 0;
src_data.src_ratio = (double)out_rate / (double)in_rate;
int16_t outdata[src_output_size * sizeof(float) / 2];
src_process(source, &src_data);
src_float_to_short_array (src_output, outdata, data.output_frames_gen);
src_float_to_short_array(outsamples, temp_outsamples, src_data.output_frames_gen * 4);
audio_write(outdata, data.output_frames_gen);
audio_write(temp_outsamples, src_data.output_frames_gen * 4);
data_ptr = 0;
}
}
static void audio_write(const void* data, size_t size)