mirror of
https://github.com/mpv-player/mpv
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504270e549
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12146 b3059339-0415-0410-9bf9-f77b7e298cf2
394 lines
11 KiB
C
394 lines
11 KiB
C
/*
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*
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* ao_macosx.c
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*
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* Original Copyright (C) Timothy J. Wood - Aug 2000
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*
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* This file is part of libao, a cross-platform library. See
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* README for a history of this source code.
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*
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* libao is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* libao is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* The MacOS X CoreAudio framework doesn't mesh as simply as some
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* simpler frameworks do. This is due to the fact that CoreAudio pulls
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* audio samples rather than having them pushed at it (which is nice
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* when you are wanting to do good buffering of audio).
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*/
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/* Change log:
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*
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* 14/5-2003: Ported to MPlayer libao2 by Dan Christiansen
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*
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* AC-3 and MPEG audio passthrough is possible, but I don't have
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* access to a sound card that supports it.
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*/
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#include <CoreAudio/AudioHardware.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <pthread.h>
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#include "../mp_msg.h"
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#include "audio_out.h"
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#include "audio_out_internal.h"
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#include "afmt.h"
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static ao_info_t info =
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{
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"Darwin/Mac OS X native audio output",
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"macosx",
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"Timothy J. Wood & Dan Christiansen",
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""
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};
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LIBAO_EXTERN(macosx)
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/* Prefix for all mp_msg() calls */
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#define ao_msg(a, b, c...) mp_msg(a, b, "AO: [macosx] " c)
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/* This is large, but best (maybe it should be even larger).
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* CoreAudio supposedly has an internal latency in the order of 2ms */
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#define NUM_BUFS 128
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typedef struct ao_macosx_s
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{
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/* CoreAudio */
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AudioDeviceID outputDeviceID;
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AudioStreamBasicDescription outputStreamBasicDescription;
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/* Ring-buffer */
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pthread_mutex_t buffer_mutex; /* mutex covering buffer variables */
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unsigned char *buffer[NUM_BUFS];
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unsigned int buffer_len;
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unsigned int buf_read;
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unsigned int buf_write;
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unsigned int buf_read_pos;
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unsigned int buf_write_pos;
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int full_buffers;
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int buffered_bytes;
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} ao_macosx_t;
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static ao_macosx_t *ao;
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/* General purpose Ring-buffering routines */
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static int write_buffer(unsigned char* data,int len){
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int len2=0;
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int x;
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while(len>0){
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if(ao->full_buffers==NUM_BUFS) {
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ao_msg(MSGT_AO,MSGL_V, "Buffer overrun\n");
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break;
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}
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x=ao->buffer_len-ao->buf_write_pos;
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if(x>len) x=len;
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memcpy(ao->buffer[ao->buf_write]+ao->buf_write_pos,data+len2,x);
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/* accessing common variables, locking mutex */
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pthread_mutex_lock(&ao->buffer_mutex);
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len2+=x; len-=x;
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ao->buffered_bytes+=x; ao->buf_write_pos+=x;
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if(ao->buf_write_pos>=ao->buffer_len) {
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/* block is full, find next! */
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ao->buf_write=(ao->buf_write+1)%NUM_BUFS;
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++ao->full_buffers;
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ao->buf_write_pos=0;
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}
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pthread_mutex_unlock(&ao->buffer_mutex);
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}
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return len2;
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}
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static int read_buffer(unsigned char* data,int len){
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int len2=0;
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int x;
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while(len>0){
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if(ao->full_buffers==0) {
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ao_msg(MSGT_AO,MSGL_V, "Buffer underrun\n");
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break;
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}
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x=ao->buffer_len-ao->buf_read_pos;
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if(x>len) x=len;
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memcpy(data+len2,ao->buffer[ao->buf_read]+ao->buf_read_pos,x);
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len2+=x; len-=x;
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/* accessing common variables, locking mutex */
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pthread_mutex_lock(&ao->buffer_mutex);
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ao->buffered_bytes-=x; ao->buf_read_pos+=x;
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if(ao->buf_read_pos>=ao->buffer_len){
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/* block is empty, find next! */
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ao->buf_read=(ao->buf_read+1)%NUM_BUFS;
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--ao->full_buffers;
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ao->buf_read_pos=0;
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}
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pthread_mutex_unlock(&ao->buffer_mutex);
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}
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return len2;
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}
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/* end ring buffer stuff */
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/* The function that the CoreAudio thread calls when it wants more data */
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static OSStatus audioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData)
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{
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outOutputData->mBuffers[0].mDataByteSize =
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read_buffer((char *)outOutputData->mBuffers[0].mData, ao->buffer_len);
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return 0;
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}
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static int control(int cmd,void *arg){
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switch (cmd) {
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case AOCONTROL_SET_DEVICE:
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case AOCONTROL_GET_DEVICE:
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case AOCONTROL_GET_VOLUME:
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case AOCONTROL_SET_VOLUME:
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/* unimplemented/meaningless */
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return CONTROL_FALSE;
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case AOCONTROL_QUERY_FORMAT:
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/* stick with what CoreAudio requests */
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return CONTROL_FALSE;
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default:
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return CONTROL_FALSE;
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}
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}
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static int init(int rate,int channels,int format,int flags)
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{
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OSStatus status;
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UInt32 propertySize;
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int rc;
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int i;
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ao = (ao_macosx_t *)malloc(sizeof(ao_macosx_t));
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/* initialise mutex */
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pthread_mutex_init(&ao->buffer_mutex, NULL);
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pthread_mutex_unlock(&ao->buffer_mutex);
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/* get default output device */
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propertySize = sizeof(ao->outputDeviceID);
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status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &propertySize, &(ao->outputDeviceID));
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if (status) {
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ao_msg(MSGT_AO,MSGL_WARN,
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"AudioHardwareGetProperty returned %d\n",
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(int)status);
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return CONTROL_FALSE;
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}
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if (ao->outputDeviceID == kAudioDeviceUnknown) {
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ao_msg(MSGT_AO,MSGL_WARN, "AudioHardwareGetProperty: ao->outputDeviceID is kAudioDeviceUnknown\n");
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return CONTROL_FALSE;
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}
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/* get default output format
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* TODO: get all support formats and iterate through them
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*/
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propertySize = sizeof(ao->outputStreamBasicDescription);
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status = AudioDeviceGetProperty(ao->outputDeviceID, 0, false, kAudioDevicePropertyStreamFormat, &propertySize, &ao->outputStreamBasicDescription);
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if (status) {
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceGetProperty returned %d when getting kAudioDevicePropertyStreamFormat\n", (int)status);
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return CONTROL_FALSE;
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}
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ao_msg(MSGT_AO,MSGL_V, "hardware format...\n");
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ao_msg(MSGT_AO,MSGL_V, "%f mSampleRate\n", ao->outputStreamBasicDescription.mSampleRate);
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ao_msg(MSGT_AO,MSGL_V, " %c%c%c%c mFormatID\n",
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(int)(ao->outputStreamBasicDescription.mFormatID & 0xff000000) >> 24,
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(int)(ao->outputStreamBasicDescription.mFormatID & 0x00ff0000) >> 16,
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(int)(ao->outputStreamBasicDescription.mFormatID & 0x0000ff00) >> 8,
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(int)(ao->outputStreamBasicDescription.mFormatID & 0x000000ff) >> 0);
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ao_msg(MSGT_AO,MSGL_V, "%5d mBytesPerPacket\n",
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(int)ao->outputStreamBasicDescription.mBytesPerPacket);
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ao_msg(MSGT_AO,MSGL_V, "%5d mFramesPerPacket\n",
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(int)ao->outputStreamBasicDescription.mFramesPerPacket);
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ao_msg(MSGT_AO,MSGL_V, "%5d mBytesPerFrame\n",
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(int)ao->outputStreamBasicDescription.mBytesPerFrame);
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ao_msg(MSGT_AO,MSGL_V, "%5d mChannelsPerFrame\n",
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(int)ao->outputStreamBasicDescription.mChannelsPerFrame);
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/* get requested buffer length */
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propertySize = sizeof(ao->buffer_len);
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status = AudioDeviceGetProperty(ao->outputDeviceID, 0, false, kAudioDevicePropertyBufferSize, &propertySize, &ao->buffer_len);
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if (status) {
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceGetProperty returned %d when getting kAudioDevicePropertyBufferSize\n", (int)status);
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return CONTROL_FALSE;
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}
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ao_msg(MSGT_AO,MSGL_V, "%5d ao->buffer_len\n", (int)ao->buffer_len);
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/* FIXME:
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*
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* Resampling of 32-bit float audio is broken in MPlayer. Refuse to
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* handle anything other than the native format until this is fixed
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* or this module is rewritten, whichever comes first.
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*/
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if (ao_data.samplerate == ao->outputStreamBasicDescription.mSampleRate) {
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ao_data.samplerate = (int)ao->outputStreamBasicDescription.mSampleRate;
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} else {
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ao_msg(MSGT_AO,MSGL_WARN, "Resampling not supported yet.\n");
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return 0;
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}
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ao_data.channels = ao->outputStreamBasicDescription.mChannelsPerFrame;
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ao_data.outburst = ao_data.buffersize = ao->buffer_len;
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ao_data.bps =
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ao_data.samplerate * ao->outputStreamBasicDescription.mBytesPerFrame;
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if (ao->outputStreamBasicDescription.mFormatID == kAudioFormatLinearPCM) {
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uint32_t flags = ao->outputStreamBasicDescription.mFormatFlags;
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if (flags & kAudioFormatFlagIsFloat) {
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ao_data.format = AFMT_FLOAT;
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} else {
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ao_msg(MSGT_AO,MSGL_WARN, "Unsupported audio output "
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"format %d. Please report this to the developer\n",
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(int)status);
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return CONTROL_FALSE;
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}
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} else {
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/* TODO: handle AFMT_AC3, AFMT_MPEG & friends */
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ao_msg(MSGT_AO,MSGL_WARN, "Default Audio Device doesn't "
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"support Linear PCM!\n");
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return CONTROL_FALSE;
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}
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/* Allocate ring-buffer memory */
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for(i=0;i<NUM_BUFS;i++)
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ao->buffer[i]=(unsigned char *) malloc(ao->buffer_len);
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/* Prepare for playback */
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reset();
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/* Set the IO proc that CoreAudio will call when it needs data */
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status = AudioDeviceAddIOProc(ao->outputDeviceID, audioDeviceIOProc, NULL);
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if (status) {
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceAddIOProc returned %d\n", (int)status);
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return CONTROL_FALSE;
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}
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/* Start callback */
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status = AudioDeviceStart(ao->outputDeviceID, audioDeviceIOProc);
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if (status) {
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceStart returned %d\n",
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(int)status);
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return CONTROL_FALSE;
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}
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return CONTROL_OK;
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}
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static int play(void* output_samples,int num_bytes,int flags)
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{
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return write_buffer(output_samples, num_bytes);
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}
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/* set variables and buffer to initial state */
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static void reset()
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{
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int i;
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pthread_mutex_lock(&ao->buffer_mutex);
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/* reset ring-buffer state */
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ao->buf_read=0;
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ao->buf_write=0;
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ao->buf_read_pos=0;
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ao->buf_write_pos=0;
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ao->full_buffers=0;
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ao->buffered_bytes=0;
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/* zero output buffer */
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for (i = 0; i < NUM_BUFS; i++)
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bzero(ao->buffer[i], ao->buffer_len);
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pthread_mutex_unlock(&ao->buffer_mutex);
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return;
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}
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/* return available space */
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static int get_space()
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{
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return (NUM_BUFS-ao->full_buffers)*ao_data.buffersize - ao->buf_write_pos;
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}
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/* return delay until audio is played */
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static float get_delay()
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{
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return (float)(ao->buffered_bytes)/(float)ao_data.bps;
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}
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/* unload plugin and deregister from coreaudio */
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static void uninit(int immed)
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{
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int i;
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OSErr status;
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reset();
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status = AudioDeviceRemoveIOProc(ao->outputDeviceID, audioDeviceIOProc);
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if (status)
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceRemoveIOProc "
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"returned %d\n", (int)status);
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for(i=0;i<NUM_BUFS;i++) free(ao->buffer[i]);
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free(ao);
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}
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/* stop playing, keep buffers (for pause) */
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static void audio_pause()
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{
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OSErr status;
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/* stop callback */
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status = AudioDeviceStop(ao->outputDeviceID, audioDeviceIOProc);
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if (status)
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceStop returned %d\n",
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(int)status);
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}
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/* resume playing, after audio_pause() */
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static void audio_resume()
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{
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OSErr status = AudioDeviceStart(ao->outputDeviceID, audioDeviceIOProc);
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if (status)
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ao_msg(MSGT_AO,MSGL_WARN, "AudioDeviceStart returned %d\n",
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(int)status);
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}
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