new windows waveout audio driver

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7914 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 249 insertions, 0 deletions

diff --git a/libao2/ao_win32.c b/libao2/ao_win32.c
new file mode 100644
index 0000000000..597e2cc993
--- /dev/null
+++ b/libao2/ao_win32.c
@@ -0,0 +1,249 @@
+/******************************************************************************
+ * ao_win32.c: Windows waveOut interface for MPlayer
+ * Copyright (c) 2002 Sascha Sommer <saschasommer@freenet.de>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *
+ *****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+#include <mmsystem.h>
+
+#include "afmt.h"
+#include "audio_out.h"
+#include "audio_out_internal.h"
+#include "../mp_msg.h"
+#include "../libvo/fastmemcpy.h"
+
+#define SAMPLESIZE   1024
+#define BUFFER_SIZE  4096
+#define BUFFER_COUNT 16 
+
+
+static WAVEHDR*     waveBlocks;         //pointer to our ringbuffer memory
+static HWAVEOUT     hWaveOut;           //handle to the waveout device
+static DWORD        restoredvolume;     //saves the volume to restore after playing
+static unsigned int buf_write=0;
+static unsigned int buf_write_pos=0;
+static int          full_buffers=0;
+static int          buffered_bytes=0;
+
+
+static ao_info_t info = 
+{
+	"Windows waveOut audio output",
+	"win32",
+	"Sascha Sommer <saschasommer@freenet.de>",
+	""
+};
+
+LIBAO_EXTERN(win32)
+
+static void CALLBACK waveOutProc(HWAVEOUT hWaveOut,UINT uMsg,DWORD dwInstance,  
+    DWORD dwParam1,DWORD dwParam2)
+{
+	if(uMsg != WOM_DONE)
+        return;
+    if(full_buffers==0) return;    //no more data buffered!
+    buffered_bytes=0;              //buffer is empty
+    --full_buffers;
+}
+
+// to set/get/query special features/parameters
+static int control(int cmd,int arg)
+{
+	DWORD volume;
+	switch (cmd)
+	{
+		case AOCONTROL_GET_VOLUME:
+		{
+			ao_control_vol_t* vol = (ao_control_vol_t*)arg;
+			waveOutGetVolume(hWaveOut,&volume);
+			vol->left = (float)(LOWORD(volume)/655.35);
+			vol->right = (float)(HIWORD(volume)/655.35);
+			mp_msg(MSGT_AO, MSGL_DBG2,"ao_win32: volume left:%f volume right:%f\n",vol->left,vol->right);
+			return CONTROL_OK;
+		}
+		case AOCONTROL_SET_VOLUME:
+		{
+			ao_control_vol_t* vol = (ao_control_vol_t*)arg;
+			volume = MAKELONG(vol->left*655.35,vol->right*655.35);
+			waveOutSetVolume(hWaveOut,volume);
+			return CONTROL_OK;
+		}
+	}
+    return -1;
+}
+
+// open & setup audio device
+// return: 1=success 0=fail
+static int init(int rate,int channels,int format,int flags)
+{
+	WAVEFORMATEX wformat;      
+	DWORD totalBufferSize = (BUFFER_SIZE + sizeof(WAVEHDR)) * BUFFER_COUNT;
+	MMRESULT result;
+	unsigned char* buffer;
+	int i;
+   
+	//fill global ao_data 
+	ao_data.channels=channels;
+	ao_data.samplerate=rate;
+	ao_data.format=format;
+	ao_data.bps=channels*rate;
+	if(format != AFMT_U8 && format != AFMT_S8)
+	  ao_data.bps*=2;
+	if(ao_data.buffersize==-1)
+	{
+		ao_data.buffersize=audio_out_format_bits(format)/8;
+        ao_data.buffersize*= channels;
+		ao_data.buffersize*= SAMPLESIZE;
+	}
+	mp_msg(MSGT_AO, MSGL_V,"ao_win32: Samplerate:%iHz Channels:%i Format:%s\n",rate, channels, audio_out_format_name(format));
+    mp_msg(MSGT_AO, MSGL_V,"ao_win32: Buffersize:%d\n",ao_data.buffersize);
+	
+	//fill waveformatex
+    ZeroMemory( &wformat, sizeof(WAVEFORMATEX));
+    wformat.cbSize          = 0; /* size of _extra_ info */
+	wformat.wFormatTag      = WAVE_FORMAT_PCM;  
+    wformat.nChannels       = channels;                
+    wformat.nSamplesPerSec  = rate;            
+    wformat.wBitsPerSample  = audio_out_format_bits(format); 
+    wformat.nBlockAlign     = wformat.nChannels * (wformat.wBitsPerSample >> 3);
+    wformat.nAvgBytesPerSec = wformat.nSamplesPerSec * wformat.nBlockAlign;
+ 	
+    //open sound device
+    //WAVE_MAPPER always points to the default wave device on the system
+    result = waveOutOpen(&hWaveOut,WAVE_MAPPER,&wformat,(DWORD_PTR)waveOutProc,0,CALLBACK_FUNCTION);
+	if(result == WAVERR_BADFORMAT)
+	{
+		mp_msg(MSGT_AO, MSGL_ERR,"ao_win32: format not supported switching to default\n");
+        ao_data.channels = wformat.nChannels = 2;
+	    ao_data.samplerate = wformat.nSamplesPerSec = 44100;
+	    ao_data.format = AFMT_S16_LE;
+	    ao_data.bps=ao_data.channels * ao_data.samplerate;
+	    ao_data.buffersize=wformat.wBitsPerSample=16;
+        wformat.nBlockAlign     = wformat.nChannels * (wformat.wBitsPerSample >> 3);
+        wformat.nAvgBytesPerSec = wformat.nSamplesPerSec * wformat.nBlockAlign;
+		ao_data.buffersize/=8;
+		ao_data.buffersize*= ao_data.channels;
+		ao_data.buffersize*= SAMPLESIZE;
+        result = waveOutOpen(&hWaveOut,WAVE_MAPPER,&wformat,(DWORD_PTR)waveOutProc,0,CALLBACK_FUNCTION);
+	}
+	if(result != MMSYSERR_NOERROR)
+	{
+		mp_msg(MSGT_AO, MSGL_ERR,"ao_win32: unable to open wave mapper device\n");
+		return 0;
+    }
+    //save volume
+	waveOutGetVolume(hWaveOut,&restoredvolume); 
+	//allocate buffer memory as one big block
+	buffer = malloc(totalBufferSize);
+    //and setup pointers to each buffer 
+    waveBlocks = (WAVEHDR*)buffer;
+    buffer += sizeof(WAVEHDR) * BUFFER_COUNT;
+    for(i = 0; i < BUFFER_COUNT; i++) {
+        waveBlocks[i].dwBufferLength = BUFFER_SIZE;
+        waveBlocks[i].lpData = buffer;
+        buffer += BUFFER_SIZE;
+    }
+
+    return 1;
+}
+
+// close audio device
+static void uninit()
+{
+    waveOutSetVolume(hWaveOut,restoredvolume);  //restore volume
+	waveOutReset(hWaveOut);
+	waveOutClose(hWaveOut);
+	mp_msg(MSGT_AO, MSGL_V,"waveOut device closed\n");
+	full_buffers=0;
+    free(waveBlocks);
+	mp_msg(MSGT_AO, MSGL_V,"buffer memory freed\n");
+}
+
+// stop playing and empty buffers (for seeking/pause)
+static void reset()
+{
+   	waveOutReset(hWaveOut);
+	buf_write=0;
+    buf_write_pos=0;
+	full_buffers=0;
+	buffered_bytes=0;
+}
+
+// stop playing, keep buffers (for pause)
+static void audio_pause()
+{
+    waveOutPause(hWaveOut);
+}
+
+// resume playing, after audio_pause()
+static void audio_resume()
+{
+	waveOutRestart(hWaveOut);
+}
+
+// return: how many bytes can be played without blocking
+static int get_space()
+{
+    return (BUFFER_COUNT-full_buffers)*BUFFER_SIZE - buf_write_pos;
+}
+
+//writes data into buffer, based on ringbuffer code in ao_sdl.c
+static int write_waveOutBuffer(unsigned char* data,int len){
+  WAVEHDR* current;
+  int len2=0;
+  int x;
+  while(len>0){                       
+    current = &waveBlocks[buf_write];
+	if(full_buffers==BUFFER_COUNT) break;  
+    //unprepare the header if it is prepared
+	if(current->dwFlags & WHDR_PREPARED) 
+           waveOutUnprepareHeader(hWaveOut, current, sizeof(WAVEHDR));
+	x=BUFFER_SIZE-buf_write_pos;          
+    if(x>len) x=len;                   
+    memcpy(current->lpData+buf_write_pos,data+len2,x); 
+    len2+=x; len-=x;                 
+	buffered_bytes+=x; buf_write_pos+=x; 
+	//prepare header and write data to device
+	waveOutPrepareHeader(hWaveOut, current, sizeof(WAVEHDR));
+	waveOutWrite(hWaveOut, current, sizeof(WAVEHDR));
+    
+	if(buf_write_pos>=BUFFER_SIZE){        //buffer is full find next
+       // block is full, find next!
+       buf_write=(buf_write+1)%BUFFER_COUNT;  
+       ++full_buffers;                
+	   buf_write_pos=0;                 
+    }                                 
+  }
+  return len2;
+}
+
+// plays 'len' bytes of 'data'
+// it should round it down to outburst*n
+// return: number of bytes played
+static int play(void* data,int len,int flags)
+{
+	return write_waveOutBuffer(data,len);
+}
+int previous = 0;
+// return: delay in seconds between first and last sample in buffer
+static float get_delay()
+{
+	return (float)(buffered_bytes + ao_data.buffersize)/(float)ao_data.bps;
+}