X-Git-Url: http://git.ieval.ro/?a=blobdiff_plain;f=libsamplerate%2Ftests%2Fmulti_channel_test.c;fp=libsamplerate%2Ftests%2Fmulti_channel_test.c;h=70853fb29b5269a1822cbbe0c8681b339bc30b58;hb=8529da432e52c7903e8ef3488e60725a099e6e63;hp=0000000000000000000000000000000000000000;hpb=27013d8f68878b8ed2d3f747e26f562d08d7d678;p=audio-libsamplerate.git diff --git a/libsamplerate/tests/multi_channel_test.c b/libsamplerate/tests/multi_channel_test.c new file mode 100644 index 0000000..70853fb --- /dev/null +++ b/libsamplerate/tests/multi_channel_test.c @@ -0,0 +1,364 @@ +/* +** Copyright (c) 2002-2016, Erik de Castro Lopo +** All rights reserved. +** +** This code is released under 2-clause BSD license. Please see the +** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING +*/ + +#include "config.h" + +#include +#include +#include +#include +#include + +#if (HAVE_FFTW3) +#include +#else +static inline void +fftw_cleanup (void) +{ return ; +} +#endif + +#include + +#include "util.h" +#define BUFFER_LEN 50000 +#define BLOCK_LEN (12) + +#define MAX_CHANNELS 10 + +static void simple_test (int converter, int channel_count, double target_snr) ; +static void process_test (int converter, int channel_count, double target_snr) ; +static void callback_test (int converter, int channel_count, double target_snr) ; + +int +main (void) +{ double target ; + int k ; + + puts ("\n Zero Order Hold interpolator :") ; + target = 38.0 ; + for (k = 1 ; k <= 3 ; k++) + { simple_test (SRC_ZERO_ORDER_HOLD, k, target) ; + process_test (SRC_ZERO_ORDER_HOLD, k, target) ; + callback_test (SRC_ZERO_ORDER_HOLD, k, target) ; + } ; + + puts ("\n Linear interpolator :") ; + target = 79.0 ; + for (k = 1 ; k <= 3 ; k++) + { simple_test (SRC_LINEAR, k, target) ; + process_test (SRC_LINEAR, k, target) ; + callback_test (SRC_LINEAR, k, target) ; + } ; + + puts ("\n Sinc interpolator :") ; + target = 100.0 ; + for (k = 1 ; k <= MAX_CHANNELS ; k++) + { simple_test (SRC_SINC_FASTEST, k, target) ; + process_test (SRC_SINC_FASTEST, k, target) ; + callback_test (SRC_SINC_FASTEST, k, target) ; + } ; + + fftw_cleanup () ; + puts ("") ; + + return 0 ; +} /* main */ + +/*============================================================================== +*/ + +static float input_serial [BUFFER_LEN * MAX_CHANNELS] ; +static float input_interleaved [BUFFER_LEN * MAX_CHANNELS] ; +static float output_interleaved [BUFFER_LEN * MAX_CHANNELS] ; +static float output_serial [BUFFER_LEN * MAX_CHANNELS] ; + +static void +simple_test (int converter, int channel_count, double target_snr) +{ SRC_DATA src_data ; + + double freq, snr ; + int ch, error, frames ; + + printf ("\t%-22s (%2d channel%c) ............ ", "simple_test", channel_count, channel_count > 1 ? 's' : ' ') ; + fflush (stdout) ; + + assert (channel_count <= MAX_CHANNELS) ; + + memset (input_serial, 0, sizeof (input_serial)) ; + memset (input_interleaved, 0, sizeof (input_interleaved)) ; + memset (output_interleaved, 0, sizeof (output_interleaved)) ; + memset (output_serial, 0, sizeof (output_serial)) ; + + frames = BUFFER_LEN ; + + /* Calculate channel_count separate windowed sine waves. */ + for (ch = 0 ; ch < channel_count ; ch++) + { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; + gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; + } ; + + /* Interleave the data in preparation for SRC. */ + interleave_data (input_serial, input_interleaved, frames, channel_count) ; + + /* Choose a converstion ratio <= 1.0. */ + src_data.src_ratio = 0.95 ; + + src_data.data_in = input_interleaved ; + src_data.input_frames = frames ; + + src_data.data_out = output_interleaved ; + src_data.output_frames = frames ; + + if ((error = src_simple (&src_data, converter, channel_count))) + { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; + exit (1) ; + } ; + + if (fabs (src_data.output_frames_gen - src_data.src_ratio * src_data.input_frames) > 2) + { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__, + src_data.output_frames_gen, (int) floor (src_data.src_ratio * src_data.input_frames)) ; + printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; + printf ("\tinput_len : %ld\n", src_data.input_frames) ; + printf ("\toutput_len : %ld\n\n", src_data.output_frames_gen) ; + exit (1) ; + } ; + + /* De-interleave data so SNR can be calculated for each channel. */ + deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; + + for (ch = 0 ; ch < channel_count ; ch++) + { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; + if (snr < target_snr) + { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; + save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; + exit (1) ; + } ; + } ; + + puts ("ok") ; + + return ; +} /* simple_test */ + +/*============================================================================== +*/ + +static void +process_test (int converter, int channel_count, double target_snr) +{ SRC_STATE *src_state ; + SRC_DATA src_data ; + + double freq, snr ; + int ch, error, frames, current_in, current_out ; + + printf ("\t%-22s (%2d channel%c) ............ ", "process_test", channel_count, channel_count > 1 ? 's' : ' ') ; + fflush (stdout) ; + + assert (channel_count <= MAX_CHANNELS) ; + + memset (input_serial, 0, sizeof (input_serial)) ; + memset (input_interleaved, 0, sizeof (input_interleaved)) ; + memset (output_interleaved, 0, sizeof (output_interleaved)) ; + memset (output_serial, 0, sizeof (output_serial)) ; + + frames = BUFFER_LEN ; + + /* Calculate channel_count separate windowed sine waves. */ + for (ch = 0 ; ch < channel_count ; ch++) + { freq = (400.0 + 11.333333333 * ch) / 44100.0 ; + gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; + } ; + + /* Interleave the data in preparation for SRC. */ + interleave_data (input_serial, input_interleaved, frames, channel_count) ; + + /* Perform sample rate conversion. */ + if ((src_state = src_new (converter, channel_count, &error)) == NULL) + { printf ("\n\nLine %d : src_new() failed : %s\n\n", __LINE__, src_strerror (error)) ; + exit (1) ; + } ; + + src_data.end_of_input = 0 ; /* Set this later. */ + + /* Choose a converstion ratio < 1.0. */ + src_data.src_ratio = 0.95 ; + + src_data.data_in = input_interleaved ; + src_data.data_out = output_interleaved ; + + current_in = current_out = 0 ; + + while (1) + { src_data.input_frames = MAX (MIN (BLOCK_LEN, frames - current_in), 0) ; + src_data.output_frames = MAX (MIN (BLOCK_LEN, frames - current_out), 0) ; + + if ((error = src_process (src_state, &src_data))) + { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; + exit (1) ; + } ; + + if (src_data.end_of_input && src_data.output_frames_gen == 0) + break ; + + current_in += src_data.input_frames_used ; + current_out += src_data.output_frames_gen ; + + src_data.data_in += src_data.input_frames_used * channel_count ; + src_data.data_out += src_data.output_frames_gen * channel_count ; + + src_data.end_of_input = (current_in >= frames) ? 1 : 0 ; + } ; + + src_state = src_delete (src_state) ; + + if (fabs (current_out - src_data.src_ratio * current_in) > 2) + { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, + current_out, (int) floor (src_data.src_ratio * current_in)) ; + printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; + printf ("\tinput_len : %d\n", frames) ; + printf ("\toutput_len : %d\n\n", current_out) ; + exit (1) ; + } ; + + /* De-interleave data so SNR can be calculated for each channel. */ + deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; + + for (ch = 0 ; ch < channel_count ; ch++) + { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; + if (snr < target_snr) + { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; + save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; + exit (1) ; + } ; + } ; + + puts ("ok") ; + + return ; +} /* process_test */ + +/*============================================================================== +*/ + +typedef struct +{ int channels ; + long total_frames ; + long current_frame ; + float *data ; +} TEST_CB_DATA ; + +static long +test_callback_func (void *cb_data, float **data) +{ TEST_CB_DATA *pcb_data ; + + long frames ; + + if ((pcb_data = cb_data) == NULL) + return 0 ; + + if (data == NULL) + return 0 ; + + *data = pcb_data->data + (pcb_data->current_frame * pcb_data->channels) ; + + if (pcb_data->total_frames - pcb_data->current_frame < BLOCK_LEN) + frames = pcb_data->total_frames - pcb_data->current_frame ; + else + frames = BLOCK_LEN ; + + pcb_data->current_frame += frames ; + + return frames ; +} /* test_callback_func */ + +static void +callback_test (int converter, int channel_count, double target_snr) +{ TEST_CB_DATA test_callback_data ; + SRC_STATE *src_state = NULL ; + + double freq, snr, src_ratio ; + int ch, error, frames, read_total, read_count ; + + printf ("\t%-22s (%2d channel%c) ............ ", "callback_test", channel_count, channel_count > 1 ? 's' : ' ') ; + fflush (stdout) ; + + assert (channel_count <= MAX_CHANNELS) ; + + memset (input_serial, 0, sizeof (input_serial)) ; + memset (input_interleaved, 0, sizeof (input_interleaved)) ; + memset (output_interleaved, 0, sizeof (output_interleaved)) ; + memset (output_serial, 0, sizeof (output_serial)) ; + memset (&test_callback_data, 0, sizeof (test_callback_data)) ; + + frames = BUFFER_LEN ; + + /* Calculate channel_count separate windowed sine waves. */ + for (ch = 0 ; ch < channel_count ; ch++) + { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; + gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; + } ; + + /* Interleave the data in preparation for SRC. */ + interleave_data (input_serial, input_interleaved, frames, channel_count) ; + + /* Perform sample rate conversion. */ + src_ratio = 0.95 ; + test_callback_data.channels = channel_count ; + test_callback_data.total_frames = frames ; + test_callback_data.current_frame = 0 ; + test_callback_data.data = input_interleaved ; + + if ((src_state = src_callback_new (test_callback_func, converter, channel_count, &error, &test_callback_data)) == NULL) + { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; + exit (1) ; + } ; + + read_total = 0 ; + while (read_total < frames) + { read_count = src_callback_read (src_state, src_ratio, frames - read_total, output_interleaved + read_total * channel_count) ; + + if (read_count <= 0) + break ; + + read_total += read_count ; + } ; + + if ((error = src_error (src_state)) != 0) + { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; + exit (1) ; + } ; + + src_state = src_delete (src_state) ; + + if (fabs (read_total - src_ratio * frames) > 2) + { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, + read_total, (int) floor (src_ratio * frames)) ; + printf ("\tsrc_ratio : %.4f\n", src_ratio) ; + printf ("\tinput_len : %d\n", frames) ; + printf ("\toutput_len : %d\n\n", read_total) ; + exit (1) ; + } ; + + /* De-interleave data so SNR can be calculated for each channel. */ + deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; + + for (ch = 0 ; ch < channel_count ; ch++) + { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; + if (snr < target_snr) + { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; + save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; + exit (1) ; + } ; + } ; + + puts ("ok") ; + + return ; +} /* callback_test */ +