first attempt at mp3 playback in x11 simulator using libmad

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@535 a1c6a512-1295-4272-9138-f99709370657

4 files changed, 272 insertions, 1 deletions

diff --git a/uisimulator/play.c b/uisimulator/play.c
index 7031fd208e..f9877134eb 100644
--- a/uisimulator/play.c
+++ b/uisimulator/play.c
@@ -29,6 +29,10 @@
 
 #include "id3.h"
 
+#ifdef MPEG_PLAY
+#include "x11/mpegplay.h"
+#endif
+
 #define LINE_Y      8 /* initial line */
 #define LINE_HEIGTH 8 /* line height in pixels */
 
@@ -68,6 +72,12 @@ void playtune(char *dir, char *file)
   lcd_update();
 #endif
 
+#ifdef MPEG_PLAY
+  sprintf(buffer, "%s/%s", dir, file);
+  mpeg_play(buffer);
+  return;
+#endif
+
   while(1) {
     int key = button_get();
 
diff --git a/uisimulator/x11/Makefile b/uisimulator/x11/Makefile
index 9753394456..7cc8b088c3 100644
--- a/uisimulator/x11/Makefile
+++ b/uisimulator/x11/Makefile
@@ -57,6 +57,12 @@ APPS = tetris.c screensaver.c tree.c app.c play.c menu.c icons.c
 SRCS = screenhack.c uibasic.c resources.c visual.c lcd-x11.c \
         button-x11.c io.c sleep.c $(APPS) $(FIRMSRCS)
 
+ifdef MPEG_PLAY
+  SRCS += mpegplay.c
+  DEFINES += -DMPEG_PLAY
+  LIBS = -lmad
+endif
+
 OBJS := $(SRCS:c=o)
 
 all: $(TARGET)
@@ -108,7 +114,7 @@ sprintf.o: $(COMMON)/sprintf.c
         $(CC) $(CFLAGS) -c $<
 
 $(TARGET): $(OBJS)
-        $(CC) -g -o $(TARGET) $(LIBDIRS) $(LDFLAGS) $(OBJS)
+        $(CC) -g -o $(TARGET) $(LIBDIRS) $(LDFLAGS) $(OBJS) $(LIBS)
 
 DEPS:=.deps
 
diff --git a/uisimulator/x11/mpegplay.c b/uisimulator/x11/mpegplay.c
new file mode 100644
index 0000000000..2d31c073dd
--- /dev/null
+++ b/uisimulator/x11/mpegplay.c
@@ -0,0 +1,232 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2002 Dave Chapman
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifdef MPEG_PLAY
+
+#include <string.h>
+#include <stdlib.h>
+#include <file.h>
+#include <types.h>
+#include <lcd.h>
+#include <button.h>
+#include "id3.h"
+
+#include <stdio.h>
+#include <mad.h>
+#include <linux/soundcard.h>
+
+/* We want to use the "real" open in some cases */
+#undef open
+
+struct mad_stream  Stream;
+struct mad_frame  Frame;
+struct mad_synth  Synth;
+mad_timer_t      Timer;
+int sound;
+
+void init_oss(int sound, int sound_freq, int channels) {
+  int format=AFMT_U16_LE;
+  int setting=0x000C000D;  // 12 fragments size 8kb ? WHAT IS THIS?
+
+  if (ioctl(sound,SNDCTL_DSP_SETFRAGMENT,&setting)==-1) {
+    perror("SNDCTL_DSP_SETFRAGMENT");
+  }
+
+  if (ioctl(sound,SNDCTL_DSP_STEREO,&channels)==-1) {
+    perror("SNDCTL_DSP_STEREO");
+  }
+  if (channels==0) { fprintf(stderr,"Warning, only mono supported\n"); }
+
+  if (ioctl(sound,SNDCTL_DSP_SETFMT,&format)==-1) {
+    perror("SNDCTL_DSP_SETFMT");
+  }
+
+  fprintf(stderr,"SETTING /dev/dsp to %dHz\n",sound_freq);
+  if (ioctl(sound,SNDCTL_DSP_SPEED,&sound_freq)==-1) {
+    perror("SNDCTL_DSP_SPEED");
+  }
+}
+
+unsigned short MadFixedToUshort(mad_fixed_t Fixed)
+{
+  Fixed=Fixed>>(MAD_F_FRACBITS-15);
+  return((unsigned short)Fixed);
+}
+
+#define INPUT_BUFFER_SIZE  (5*8192)
+#define OUTPUT_BUFFER_SIZE  8192 /* Must be an integer multiple of 4. */
+int mpeg_play(char* fname)
+{
+  unsigned char    InputBuffer[INPUT_BUFFER_SIZE],
+            OutputBuffer[OUTPUT_BUFFER_SIZE],
+            *OutputPtr=OutputBuffer;
+  const unsigned char  *OutputBufferEnd=OutputBuffer+OUTPUT_BUFFER_SIZE;
+  int          Status=0,
+            i;
+  unsigned long    FrameCount=0;
+  int sound,fd;
+  mp3entry mp3;
+  
+  mp3info(&mp3, fname);
+
+  #undef open
+  sound=open("/dev/dsp", O_WRONLY);
+
+  if (sound < 0) {
+    fprintf(stderr,"Can not open /dev/dsp - Aborting - sound=%d\n",sound);
+    exit(-1);
+  }
+
+  init_oss(sound,mp3.frequency,2);
+
+  fd=x11_open(fname,O_RDONLY);
+  if (fd < 0) {
+    fprintf(stderr,"could not open %s\n",fname);
+    return 0;
+  }
+
+  /* First the structures used by libmad must be initialized. */
+  mad_stream_init(&Stream);
+  mad_frame_init(&Frame);
+  mad_synth_init(&Synth);
+  mad_timer_reset(&Timer);
+
+  do
+  {
+    if (button_get()) break; /* Return if a key is pressed */
+
+    if(Stream.buffer==NULL || Stream.error==MAD_ERROR_BUFLEN)
+    {
+      size_t ReadSize,Remaining;
+      unsigned char *ReadStart;
+
+      if(Stream.next_frame!=NULL)
+      {
+        Remaining=Stream.bufend-Stream.next_frame;
+        memmove(InputBuffer,Stream.next_frame,Remaining);
+        ReadStart=InputBuffer+Remaining;
+        ReadSize=INPUT_BUFFER_SIZE-Remaining;
+      }
+      else
+        ReadSize=INPUT_BUFFER_SIZE,
+          ReadStart=InputBuffer,
+          Remaining=0;
+      
+      ReadSize=read(fd,ReadStart,ReadSize);
+      if(ReadSize<=0)
+      {
+        fprintf(stderr,"end of input stream\n");
+        break;
+      }
+
+      mad_stream_buffer(&Stream,InputBuffer,ReadSize+Remaining);
+      Stream.error=0;
+    }
+
+    if(mad_frame_decode(&Frame,&Stream)) {
+      if(MAD_RECOVERABLE(Stream.error))
+      {
+        fprintf(stderr,"recoverable frame level error\n");
+        fflush(stderr);
+        continue;
+      }
+      else
+        if(Stream.error==MAD_ERROR_BUFLEN) {
+          continue;
+        } else {
+          fprintf(stderr,"unrecoverable frame level error\n");
+          Status=1;
+          break;
+        }
+    }
+
+    FrameCount++;
+    mad_timer_add(&Timer,Frame.header.duration);
+        
+    mad_synth_frame(&Synth,&Frame);
+
+    for(i=0;i<Synth.pcm.length;i++)
+    {
+      unsigned short  Sample;
+
+      /* Left channel */
+      Sample=MadFixedToUshort(Synth.pcm.samples[0][i]);
+      *(OutputPtr++)=Sample&0xff;
+      *(OutputPtr++)=Sample>>8;
+
+      /* Right channel. If the decoded stream is monophonic then
+       * the right output channel is the same as the left one.
+       */
+      if(MAD_NCHANNELS(&Frame.header)==2)
+        Sample=MadFixedToUshort(Synth.pcm.samples[1][i]);
+      *(OutputPtr++)=Sample&0xff;
+      *(OutputPtr++)=Sample>>8;
+
+      /* Flush the buffer if it is full. */
+      if(OutputPtr==OutputBufferEnd)
+      {
+        if(write(sound,OutputBuffer,OUTPUT_BUFFER_SIZE)!=OUTPUT_BUFFER_SIZE)
+        {
+          fprintf(stderr,"PCM write error.\n");
+          Status=2;
+          break;
+        }
+        OutputPtr=OutputBuffer;
+      }
+    }
+  }while(1);
+
+  fprintf(stderr,"END OF MAD LOOP\n");
+  /* Mad is no longer used, the structures that were initialized must
+     * now be cleared.
+   */
+  mad_synth_finish(&Synth);
+  mad_frame_finish(&Frame);
+  mad_stream_finish(&Stream);
+
+  /* If the output buffer is not empty and no error occured during
+     * the last write, then flush it.
+   */
+  if(OutputPtr!=OutputBuffer && Status!=2)
+  {
+    size_t  BufferSize=OutputPtr-OutputBuffer;
+
+    if(write(sound,OutputBuffer,1,BufferSize)!=BufferSize)
+    {
+      fprintf(stderr,"PCM write error\n");
+      Status=2;
+    }
+  }
+
+  /* Accounting report if no error occured. */
+  if(!Status)
+  {
+    char  Buffer[80];
+
+    mad_timer_string(Timer,Buffer,"%lu:%02lu.%03u",
+             MAD_UNITS_MINUTES,MAD_UNITS_MILLISECONDS,0);
+    fprintf(stderr,"%lu frames decoded (%s).\n",FrameCount,Buffer);
+  }
+
+  close(sound);
+  /* That's the end of the world (in the H. G. Wells way). */
+  return(Status);
+}
+
+
+#endif
diff --git a/uisimulator/x11/mpegplay.h b/uisimulator/x11/mpegplay.h
new file mode 100644
index 0000000000..cde9fe183f
--- /dev/null
+++ b/uisimulator/x11/mpegplay.h
@@ -0,0 +1,23 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2002 Dave Chapman
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifdef MPEG_PLAY
+
+int mpeg_play(char* fname);
+
+#endif