mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-26 01:30:51 +00:00
315 lines
9.1 KiB
C
315 lines
9.1 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
|
|
*
|
|
* ---------------------------------------------------------------------------------------
|
|
* The following license statement only applies to this file (audio_mix.c).
|
|
* ---------------------------------------------------------------------------------------
|
|
*
|
|
* Permission is hereby granted, free of charge,
|
|
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <audio/audio_mix.h>
|
|
|
|
#if defined(__SSE2__)
|
|
#include <emmintrin.h>
|
|
#elif defined(__ALTIVEC__)
|
|
#include <altivec.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <memalign.h>
|
|
#include <retro_miscellaneous.h>
|
|
#include <audio/audio_mix.h>
|
|
#include <streams/file_stream.h>
|
|
#include <audio/conversion/float_to_s16.h>
|
|
#include <audio/conversion/s16_to_float.h>
|
|
|
|
void audio_mix_volume_C(float *out, const float *in, float vol, size_t samples)
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < samples; i++)
|
|
out[i] += in[i] * vol;
|
|
}
|
|
|
|
#ifdef __SSE2__
|
|
void audio_mix_volume_SSE2(float *out, const float *in, float vol, size_t samples)
|
|
{
|
|
size_t i;
|
|
__m128 volume = _mm_set1_ps(vol);
|
|
|
|
for (i = 0; i + 16 <= samples; i += 16, out += 16, in += 16)
|
|
{
|
|
unsigned j;
|
|
__m128 input[4];
|
|
__m128 additive[4];
|
|
|
|
input[0] = _mm_loadu_ps(out + 0);
|
|
input[1] = _mm_loadu_ps(out + 4);
|
|
input[2] = _mm_loadu_ps(out + 8);
|
|
input[3] = _mm_loadu_ps(out + 12);
|
|
|
|
additive[0] = _mm_mul_ps(volume, _mm_loadu_ps(in + 0));
|
|
additive[1] = _mm_mul_ps(volume, _mm_loadu_ps(in + 4));
|
|
additive[2] = _mm_mul_ps(volume, _mm_loadu_ps(in + 8));
|
|
additive[3] = _mm_mul_ps(volume, _mm_loadu_ps(in + 12));
|
|
|
|
for (j = 0; j < 4; j++)
|
|
_mm_storeu_ps(out + 4 * j, _mm_add_ps(input[j], additive[j]));
|
|
}
|
|
|
|
audio_mix_volume_C(out, in, vol, samples - i);
|
|
}
|
|
#endif
|
|
|
|
void audio_mix_free_chunk(audio_chunk_t *chunk)
|
|
{
|
|
if (!chunk)
|
|
return;
|
|
|
|
if (chunk->rwav && chunk->rwav->samples)
|
|
{
|
|
/* rwav_free only frees the samples */
|
|
rwav_free(chunk->rwav);
|
|
free(chunk->rwav);
|
|
}
|
|
|
|
if (chunk->buf)
|
|
free(chunk->buf);
|
|
|
|
if (chunk->upsample_buf)
|
|
memalign_free(chunk->upsample_buf);
|
|
|
|
if (chunk->float_buf)
|
|
memalign_free(chunk->float_buf);
|
|
|
|
if (chunk->float_resample_buf)
|
|
memalign_free(chunk->float_resample_buf);
|
|
|
|
if (chunk->resample_buf)
|
|
memalign_free(chunk->resample_buf);
|
|
|
|
if (chunk->resampler && chunk->resampler_data)
|
|
chunk->resampler->free(chunk->resampler_data);
|
|
|
|
free(chunk);
|
|
}
|
|
|
|
audio_chunk_t* audio_mix_load_wav_file(const char *path, int sample_rate)
|
|
{
|
|
int sample_size;
|
|
audio_chunk_t *chunk = (audio_chunk_t*)calloc(1, sizeof(*chunk));
|
|
|
|
if (!chunk)
|
|
return NULL;
|
|
|
|
chunk->sample_rate = sample_rate;
|
|
|
|
if (!filestream_read_file(path, &chunk->buf, &chunk->len))
|
|
{
|
|
printf("Could not open WAV file for reading.\n");
|
|
goto error;
|
|
}
|
|
|
|
chunk->rwav = (rwav_t*)malloc(sizeof(rwav_t));
|
|
|
|
if (rwav_load(chunk->rwav, chunk->buf, chunk->len) == RWAV_ITERATE_ERROR)
|
|
{
|
|
printf("error: could not load WAV file\n");
|
|
goto error;
|
|
}
|
|
|
|
/* numsamples does not know or care about
|
|
* multiple channels, but we need space for 2 */
|
|
chunk->upsample_buf = (int16_t*)memalign_alloc(128,
|
|
chunk->rwav->numsamples * 2 * sizeof(int16_t));
|
|
|
|
sample_size = chunk->rwav->bitspersample / 8;
|
|
|
|
if (sample_size == 1)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < chunk->rwav->numsamples; i++)
|
|
{
|
|
uint8_t *sample = (
|
|
(uint8_t*)chunk->rwav->samples) +
|
|
(i * chunk->rwav->numchannels);
|
|
|
|
chunk->upsample_buf[i * 2] = (int16_t)((sample[0] - 128) << 8);
|
|
|
|
if (chunk->rwav->numchannels == 1)
|
|
chunk->upsample_buf[(i * 2) + 1] = (int16_t)((sample[0] - 128) << 8);
|
|
else if (chunk->rwav->numchannels == 2)
|
|
chunk->upsample_buf[(i * 2) + 1] = (int16_t)((sample[1] - 128) << 8);
|
|
}
|
|
}
|
|
else if (sample_size == 2)
|
|
{
|
|
if (chunk->rwav->numchannels == 1)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < chunk->rwav->numsamples; i++)
|
|
{
|
|
int16_t sample = ((int16_t*)chunk->rwav->samples)[i];
|
|
|
|
chunk->upsample_buf[i * 2] = sample;
|
|
chunk->upsample_buf[(i * 2) + 1] = sample;
|
|
}
|
|
}
|
|
else if (chunk->rwav->numchannels == 2)
|
|
memcpy(chunk->upsample_buf, chunk->rwav->samples, chunk->rwav->subchunk2size);
|
|
}
|
|
else if (sample_size != 2)
|
|
{
|
|
/* we don't support any other sample size besides 8 and 16-bit yet */
|
|
printf("error: we don't support a sample size of %d\n", sample_size);
|
|
goto error;
|
|
}
|
|
|
|
if (sample_rate != chunk->rwav->samplerate)
|
|
{
|
|
chunk->resample = true;
|
|
chunk->ratio = (double)sample_rate / chunk->rwav->samplerate;
|
|
|
|
retro_resampler_realloc(&chunk->resampler_data,
|
|
&chunk->resampler,
|
|
NULL,
|
|
chunk->ratio);
|
|
|
|
if (chunk->resampler && chunk->resampler_data)
|
|
{
|
|
struct resampler_data info;
|
|
|
|
chunk->float_buf = (float*)memalign_alloc(128, chunk->rwav->numsamples * 2 * chunk->ratio * sizeof(float));
|
|
|
|
/* why is *3 needed instead of just *2? does the sinc driver require more space than we know about? */
|
|
chunk->float_resample_buf = (float*)memalign_alloc(128, chunk->rwav->numsamples * 3 * chunk->ratio * sizeof(float));
|
|
|
|
convert_s16_to_float(chunk->float_buf, chunk->upsample_buf, chunk->rwav->numsamples * 2, 1.0);
|
|
|
|
info.data_in = (const float*)chunk->float_buf;
|
|
info.data_out = chunk->float_resample_buf;
|
|
/* a 'frame' consists of two channels, so we set this
|
|
* to the number of samples irrespective of channel count */
|
|
info.input_frames = chunk->rwav->numsamples;
|
|
info.output_frames = 0;
|
|
info.ratio = chunk->ratio;
|
|
|
|
chunk->resampler->process(chunk->resampler_data, &info);
|
|
|
|
/* number of output_frames does not increase with multiple channels, but assume we need space for 2 */
|
|
chunk->resample_buf = (int16_t*)memalign_alloc(128, info.output_frames * 2 * sizeof(int16_t));
|
|
chunk->resample_len = info.output_frames;
|
|
convert_float_to_s16(chunk->resample_buf, chunk->float_resample_buf, info.output_frames * 2);
|
|
}
|
|
}
|
|
|
|
return chunk;
|
|
|
|
error:
|
|
audio_mix_free_chunk(chunk);
|
|
return NULL;
|
|
}
|
|
|
|
size_t audio_mix_get_chunk_num_samples(audio_chunk_t *chunk)
|
|
{
|
|
if (!chunk)
|
|
return 0;
|
|
|
|
if (chunk->rwav)
|
|
{
|
|
if (chunk->resample)
|
|
return chunk->resample_len;
|
|
return chunk->rwav->numsamples;
|
|
}
|
|
|
|
/* no other filetypes supported yet */
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* audio_mix_get_chunk_sample:
|
|
* @chunk : audio chunk instance
|
|
* @channel : channel of the sample (0=left, 1=right)
|
|
* @index : index of the sample
|
|
*
|
|
* Get a sample from an audio chunk.
|
|
*
|
|
* Returns: A signed 16-bit audio sample.
|
|
**/
|
|
int16_t audio_mix_get_chunk_sample(audio_chunk_t *chunk, unsigned channel, size_t index)
|
|
{
|
|
if (!chunk)
|
|
return 0;
|
|
|
|
if (chunk->rwav)
|
|
{
|
|
int sample_size = chunk->rwav->bitspersample / 8;
|
|
int16_t sample_out = 0;
|
|
|
|
/* 0 is the first/left channel */
|
|
uint8_t *sample = NULL;
|
|
|
|
if (chunk->resample)
|
|
sample = (uint8_t*)chunk->resample_buf +
|
|
(sample_size * index * chunk->rwav->numchannels) + (channel * sample_size);
|
|
else
|
|
sample = (uint8_t*)chunk->upsample_buf +
|
|
(sample_size * index * chunk->rwav->numchannels) + (channel * sample_size);
|
|
|
|
sample_out = (int16_t)*sample;
|
|
|
|
return sample_out;
|
|
}
|
|
|
|
/* no other filetypes supported yet */
|
|
return 0;
|
|
}
|
|
|
|
int16_t* audio_mix_get_chunk_samples(audio_chunk_t *chunk)
|
|
{
|
|
if (!chunk)
|
|
return 0;
|
|
|
|
if (chunk->rwav)
|
|
{
|
|
int16_t *sample;
|
|
|
|
if (chunk->resample)
|
|
sample = chunk->resample_buf;
|
|
else
|
|
sample = chunk->upsample_buf;
|
|
|
|
return sample;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int audio_mix_get_chunk_num_channels(audio_chunk_t *chunk)
|
|
{
|
|
if (!chunk)
|
|
return 0;
|
|
|
|
if (chunk->rwav)
|
|
return chunk->rwav->numchannels;
|
|
|
|
/* don't support other formats yet */
|
|
return 0;
|
|
}
|