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author | reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-02-16 20:45:25 +0000 |
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committer | reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-02-16 20:45:25 +0000 |
commit | 8424c24317ec46dc2a1fe17e02a191463a9e8279 (patch) | |
tree | 5365675c753beefd02c87b38c809333bb82717a5 /libao2 | |
parent | ed85b5663846e3092897bbdb38136645b7af74e9 (diff) | |
download | mpv-8424c24317ec46dc2a1fe17e02a191463a9e8279.tar.bz2 mpv-8424c24317ec46dc2a1fe17e02a191463a9e8279.tar.xz |
OpenAL audio support, actual output is mono-only (no positioning yet).
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17634 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libao2')
-rw-r--r-- | libao2/Makefile | 1 | ||||
-rw-r--r-- | libao2/ao_openal.c | 196 | ||||
-rw-r--r-- | libao2/audio_out.c | 2 |
3 files changed, 199 insertions, 0 deletions
diff --git a/libao2/Makefile b/libao2/Makefile index 1153f5a7f2..2987a7a3ee 100644 --- a/libao2/Makefile +++ b/libao2/Makefile @@ -17,6 +17,7 @@ CFLAGS = $(OPTFLAGS) -I. -I.. \ $(ESD_INC) \ $(EXTRA_INC) \ $(JACK_INC) \ + $(OPENAL_INC) \ $(POLYP_INC) \ $(SDL_INC) \ $(X11_INC) \ diff --git a/libao2/ao_openal.c b/libao2/ao_openal.c new file mode 100644 index 0000000000..842a5a4049 --- /dev/null +++ b/libao2/ao_openal.c @@ -0,0 +1,196 @@ +/* + * ao_openal.c - OpenAL audio output driver for MPlayer + * + * This driver is under the same license as MPlayer. + * (http://www.mplayerhq.hu) + * + * Copyleft 2006 by Reimar Döffinger (Reimar.Doeffinger@stud.uni-karlsruhe.de) + */ + +#include <inttypes.h> +#include <AL/alc.h> +#include <AL/al.h> + +#include "config.h" +#include "mp_msg.h" +#include "help_mp.h" + +#include "audio_out.h" +#include "audio_out_internal.h" +#include "libaf/af_format.h" +#include "osdep/timer.h" +#include "subopt-helper.h" + +static ao_info_t info = +{ + "OpenAL audio output", + "openal", + "Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de>", + "" +}; + +LIBAO_EXTERN(openal) + +#define MAX_CHANS 6 +#define NUM_BUF 128 +#define CHUNK_SIZE 512 +static ALuint buffers[MAX_CHANS][NUM_BUF]; +static ALuint sources[MAX_CHANS]; + +static int cur_buf[MAX_CHANS]; +static int unqueue_buf[MAX_CHANS]; +static int16_t *tmpbuf; + + +static int control(int cmd, void *arg) { + return CONTROL_UNKNOWN; +} + +/** + * \brief print suboption usage help + */ +static void print_help(void) { + mp_msg(MSGT_AO, MSGL_FATAL, + "\n-ao openal commandline help:\n" + "Example: mplayer -ao openal\n" + "\nOptions:\n" + ); +} + +static int init(int rate, int channels, int format, int flags) { + ALCdevice *dev = NULL; + ALCcontext *ctx = NULL; + ALint bufrate; + int i; + opt_t subopts[] = { + {NULL} + }; + if (subopt_parse(ao_subdevice, subopts) != 0) { + print_help(); + return 0; + } + if (channels > MAX_CHANS) { + mp_msg(MSGT_AO, MSGL_FATAL, "[OpenAL] Invalid number of channels: %i\n", channels); + goto err_out; + } + dev = alcOpenDevice(NULL); + if (!dev) { + mp_msg(MSGT_AO, MSGL_FATAL, "[OpenAL] could not open device\n"); + goto err_out; + } + ctx = alcCreateContext(dev, NULL); + alcMakeContextCurrent(ctx); + for (i = 0; i < channels; i++) { + cur_buf[i] = 0; + unqueue_buf[i] = 0; + alGenBuffers(NUM_BUF, buffers[i]); + } + alGenSources(channels, sources); + alSource3f(sources[0], AL_POSITION, 0, 0, 10); + ao_data.channels = channels; + alGetBufferi(buffers[0][0], AL_FREQUENCY, &bufrate); + ao_data.samplerate = rate = bufrate; + ao_data.format = AF_FORMAT_S16_NE; + ao_data.bps = channels * rate * 2; + ao_data.buffersize = CHUNK_SIZE * NUM_BUF; + ao_data.outburst = channels * CHUNK_SIZE; + tmpbuf = (int16_t *)malloc(CHUNK_SIZE); + return 1; + +err_out: + return 0; +} + +// close audio device +static void uninit(int immed) { + ALCcontext *ctx = alcGetCurrentContext(); + ALCdevice *dev = alcGetContextsDevice(ctx); + free(tmpbuf); + if (!immed) { + ALint state; + alGetSourcei(sources[0], AL_SOURCE_STATE, &state); + while (state == AL_PLAYING) { + usec_sleep(10000); + alGetSourcei(sources[0], AL_SOURCE_STATE, &state); + } + } + reset(); + alcMakeContextCurrent(NULL); + alcDestroyContext(ctx); + alcCloseDevice(dev); +} + +static void unqueue_buffers(void) { + ALint p; + int s, i; + for (s = 0; s < ao_data.channels; s++) { + alGetSourcei(sources[s], AL_BUFFERS_PROCESSED, &p); + for (i = 0; i < p; i++) { + alSourceUnqueueBuffers(sources[s], 1, &buffers[s][unqueue_buf[s]]); + unqueue_buf[s] = (unqueue_buf[s] + 1) % NUM_BUF; + } + } +} + +/** + * \brief stop playing and empty buffers (for seeking/pause) + */ +static void reset(void) { + alSourceRewindv(ao_data.channels, sources); + unqueue_buffers(); +} + +/** + * \brief stop playing, keep buffers (for pause) + */ +static void audio_pause(void) { + alSourcePausev(ao_data.channels, sources); +} + +/** + * \brief resume playing, after audio_pause() + */ +static void audio_resume(void) { + alSourcePlayv(ao_data.channels, sources); +} + +static int get_space(void) { + ALint queued; + unqueue_buffers(); + alGetSourcei(sources[0], AL_BUFFERS_QUEUED, &queued); + return (NUM_BUF - queued) * CHUNK_SIZE * ao_data.channels; +} + +/** + * \brief write data into buffer and reset underrun flag + */ +static int play(void *data, int len, int flags) { + ALint state; + int i, j, k; + int ch; + int16_t *d = data; + len /= ao_data.outburst; + for (i = 0; i < len; i++) { + for (ch = 0; ch < ao_data.channels; ch++) { + for (j = 0, k = ch; j < CHUNK_SIZE / 2; j++, k += ao_data.channels) + tmpbuf[j] = d[k]; + alBufferData(buffers[ch][cur_buf[ch]], AL_FORMAT_MONO16, tmpbuf, + CHUNK_SIZE, ao_data.samplerate); + alSourceQueueBuffers(sources[ch], 1, &buffers[ch][cur_buf[ch]]); + cur_buf[ch] = (cur_buf[ch] + 1) % NUM_BUF; + } + d += ao_data.channels * CHUNK_SIZE / 2; + } + alGetSourcei(sources[0], AL_SOURCE_STATE, &state); + if (state != AL_PLAYING) // checked here in case of an underrun + alSourcePlayv(ao_data.channels, sources); + return len * ao_data.outburst; +} + +static float get_delay(void) { + ALint queued; + unqueue_buffers(); + alGetSourcei(sources[0], AL_BUFFERS_QUEUED, &queued); + return queued * CHUNK_SIZE / 2 / (float)ao_data.samplerate; +} + diff --git a/libao2/audio_out.c b/libao2/audio_out.c index c5802006a7..f8c2682b84 100644 --- a/libao2/audio_out.c +++ b/libao2/audio_out.c @@ -31,6 +31,7 @@ extern ao_functions_t audio_out_polyp; #ifdef USE_JACK extern ao_functions_t audio_out_jack; #endif +extern ao_functions_t audio_out_openal; extern ao_functions_t audio_out_null; #ifdef HAVE_ALSA5 extern ao_functions_t audio_out_alsa5; @@ -120,6 +121,7 @@ ao_functions_t* audio_out_drivers[] = #ifdef HAVE_SDL &audio_out_sdl, #endif + &audio_out_openal, &audio_out_null, // should not be auto-selected: &audio_out_pcm, |