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Add 5.1 surround sound support

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Cameron Gutman
2015-10-26 02:54:05 +00:00
parent af383eb371
commit 48f88f6d2f
5 changed files with 60 additions and 25 deletions
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31
src/audio/sdl.c
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@@ -23,27 +23,34 @@
#include <SDL_audio.h>
#include <stdio.h>
#include <opus.h>
#include <opus_multistream.h>
#define SAMPLE_RATE 48000
#define CHANNEL_COUNT 2
#define MAX_CHANNEL_COUNT 6
#define FRAME_SIZE 240
static OpusDecoder* decoder;
static short pcmBuffer[FRAME_SIZE * CHANNEL_COUNT];
static OpusMSDecoder* decoder;
static short pcmBuffer[FRAME_SIZE * MAX_CHANNEL_COUNT];
static SDL_AudioDeviceID dev;
static int channelCount;
static void sdl_renderer_init() {
static void sdl_renderer_init(int audioConfiguration, POPUS_MULTISTREAM_CONFIGURATION opusConfig) {
int rc;
decoder = opus_decoder_create(SAMPLE_RATE, CHANNEL_COUNT, &rc);
decoder = opus_multistream_decoder_create(opusConfig->sampleRate,
opusConfig->channelCount,
opusConfig->streams,
opusConfig->coupledStreams,
opusConfig->mapping,
&rc);
channelCount = opusConfig->channelCount;
SDL_InitSubSystem(SDL_INIT_AUDIO);
SDL_AudioSpec want, have;
SDL_zero(want);
want.freq = SAMPLE_RATE;
want.freq = opusConfig->sampleRate;
want.format = AUDIO_S16LSB;
want.channels = CHANNEL_COUNT;
want.channels = opusConfig->channelCount;
want.samples = 4096;
dev = SDL_OpenAudioDevice(NULL, 0, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
@@ -58,15 +65,15 @@ static void sdl_renderer_init() {
static void sdl_renderer_cleanup() {
if (decoder != NULL)
opus_decoder_destroy(decoder);
opus_multistream_decoder_destroy(decoder);
SDL_CloseAudioDevice(dev);
}
static void sdl_renderer_decode_and_play_sample(char* data, int length) {
int decodeLen = opus_decode(decoder, data, length, pcmBuffer, FRAME_SIZE, 0);
int decodeLen = opus_multistream_decode(decoder, data, length, pcmBuffer, FRAME_SIZE, 0);
if (decodeLen > 0) {
SDL_QueueAudio(dev, pcmBuffer, decodeLen * CHANNEL_COUNT * sizeof(short));
SDL_QueueAudio(dev, pcmBuffer, decodeLen * channelCount * sizeof(short));
} else {
printf("Opus error from decode: %d\n", decodeLen);
}