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rockbox/apps/plugins/video.c
Jörg Hohensohn 12deda14d5 adaptive spinup control 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4599 a1c6a512-1295-4272-9138-f99709370657
2004-05-09 18:18:05 +00:00

968 lines
31 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Plugin for video playback
* Reads raw image data + audio data from a file
* !!!!!!!!!! Code Police free zone !!!!!!!!!!
*
* Copyright (C) 2003-2004 Jörg Hohensohn aka [IDC]Dragon
*
* 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.
*
****************************************************************************/
/****************** imports ******************/
#include "plugin.h"
#include "sh7034.h"
#include "system.h"
#include "../apps/recorder/widgets.h" // not in search path, booh
#ifndef SIMULATOR // not for simulator by now
#ifdef HAVE_LCD_BITMAP // and definitely not for the Player, haha
/****************** constants ******************/
#define INT_MAX ((int)(~(unsigned)0 >> 1))
#define INT_MIN (-INT_MAX-1)
#define SCREENSIZE (LCD_WIDTH*LCD_HEIGHT/8) // in bytes
#define FPS 68 // default fps for headerless (old video-only) file
#define MAX_ACC 20 // maximum FF/FR speedup
#define FF_TICKS 3000; // experimentally found nice
// trigger levels, we need about 80 kB/sec
#define SPINUP_INIT 5000 // from what level on to refill, in milliseconds
#define SPINUP_SAFETY 700 // how much on top of the measured spinup time
#define CHUNK (1024*32) // read size
/****************** prototypes ******************/
void timer4_isr(void); // IMIA4 ISR
int check_button(void); // determine next relative frame
/****************** data types ******************/
// plugins don't introduce headers, so structs are repeated from rvf_format.h
#define HEADER_MAGIC 0x52564668 // "RVFh" at file start
#define AUDIO_MAGIC 0x41756446 // "AudF" for each audio block
#define FILEVERSION 100 // 1.00
// format type definitions
#define VIDEOFORMAT_NO_VIDEO 0
#define VIDEOFORMAT_RAW 1
#define AUDIOFORMAT_NO_AUDIO 0
#define AUDIOFORMAT_MP3 1
#define AUDIOFORMAT_MP3_BITSWAPPED 2
// bit flags
#define FLAG_LOOP 0x00000001 // loop the playback, e.g. for stills
typedef struct // contains whatever might be useful to the player
{
// general info (16 entries = 64 byte)
unsigned long magic; // HEADER_MAGIC
unsigned long version; // file version
unsigned long flags; // combination of FLAG_xx
unsigned long blocksize; // how many bytes per block (=video frame)
unsigned long bps_average; // bits per second of the whole stream
unsigned long bps_peak; // max. of above (audio may be VBR)
unsigned long resume_pos; // file position to resume to
unsigned long reserved[9]; // reserved, should be zero
// video info (16 entries = 64 byte)
unsigned long video_format; // one of VIDEOFORMAT_xxx
unsigned long video_1st_frame; // byte position of first video frame
unsigned long video_duration; // total length of video part, in ms
unsigned long video_payload_size; // total amount of video data, in bytes
unsigned long video_bitrate; // derived from resolution and frame time, in bps
unsigned long video_frametime; // frame interval in 11.0592 MHz clocks
long video_preroll; // video is how much ahead, in 11.0592 MHz clocks
unsigned long video_width; // in pixels
unsigned long video_height; // in pixels
unsigned long video_reserved[7]; // reserved, should be zero
// audio info (16 entries = 64 byte)
unsigned long audio_format; // one of AUDIOFORMAT_xxx
unsigned long audio_1st_frame; // byte position of first video frame
unsigned long audio_duration; // total length of audio part, in ms
unsigned long audio_payload_size; // total amount of audio data, in bytes
unsigned long audio_avg_bitrate; // average audio bitrate, in bits per second
unsigned long audio_peak_bitrate; // maximum bitrate
unsigned long audio_headersize; // offset to payload in audio frames
long audio_min_associated; // minimum offset to video frame, in bytes
long audio_max_associated; // maximum offset to video frame, in bytes
unsigned long audio_reserved[7]; // reserved, should be zero
// more to come... ?
// Note: padding up to 'blocksize' with zero following this header
} tFileHeader;
typedef struct // the little header for all audio blocks
{
unsigned long magic; // AUDIO_MAGIC indicates an audio block
unsigned char previous_block; // previous how many blocks backwards
unsigned char next_block; // next how many blocks forward
short associated_video; // offset to block with corresponding video
unsigned short frame_start; // offset to first frame starting in this block
unsigned short frame_end; // offset to behind last frame ending in this block
} tAudioFrameHeader;
/****************** globals ******************/
static struct plugin_api* rb; /* here is a global api struct pointer */
static char gPrint[32]; /* a global printf buffer, saves stack */
// playstate
static struct
{
enum
{
paused,
playing,
} state;
bool bAudioUnderrun;
bool bVideoUnderrun;
bool bHasAudio;
bool bHasVideo;
int nTimeOSD; // OSD should stay for this many frames
bool bDirtyOSD; // OSD needs redraw
bool bRefilling; // set if refilling buffer
bool bSeeking;
int nSeekAcc; // accelleration value for seek
int nSeekPos; // current file position for seek
bool bDiskSleep; // disk is suspended
} gPlay;
// buffer information
static struct
{
int bufsize;
int granularity; // common multiple of block and sector size
unsigned char* pBufStart; // start of ring buffer
unsigned char* pBufEnd; // end of ring buffer
unsigned char* pOSD; // OSD memory (112 bytes for 112*8 pixels)
int vidcount; // how many video blocks are known in a row
unsigned char* pBufFill; // write pointer for disk, owned by main task
unsigned char* pReadVideo; // video readout, maintained by timer ISR
unsigned char* pReadAudio; // audio readout, maintained by demand ISR
bool bEOF; // flag for end of file
int low_water; // reload threshold
int high_water; // end of reload threshold
int spinup_safety; // safety margin when recalculating low_water
int nReadChunk; // how much data for normal buffer fill
int nSeekChunk; // how much data while seeking
} gBuf;
// statistics
static struct
{
int minAudioAvail;
int minVideoAvail;
int nAudioUnderruns;
int nVideoUnderruns;
long minSpinup;
long maxSpinup;
} gStats;
tFileHeader gFileHdr; // file header
/****************** implementation ******************/
// tool function: return how much playable audio/video is left
int Available(unsigned char* pSnapshot)
{
if (pSnapshot <= gBuf.pBufFill)
return gBuf.pBufFill - pSnapshot;
else
return gBuf.bufsize - (pSnapshot - gBuf.pBufFill);
}
// debug function to draw buffer indicators
void DrawBuf(void)
{
int fill, video, audio;
rb->memset(gBuf.pOSD, 0x10, LCD_WIDTH); // draw line
gBuf.pOSD[0] = gBuf.pOSD[LCD_WIDTH-1] = 0xFE; // ends
// calculate new tick positions
fill = 1 + ((gBuf.pBufFill - gBuf.pBufStart) * (LCD_WIDTH-2)) / gBuf.bufsize;
video = 1 + ((gBuf.pReadVideo - gBuf.pBufStart) * (LCD_WIDTH-2)) / gBuf.bufsize;
audio = 1 + ((gBuf.pReadAudio - gBuf.pBufStart) * (LCD_WIDTH-2)) / gBuf.bufsize;
gBuf.pOSD[fill] |= 0x20; // below the line, two pixels
gBuf.pOSD[video] |= 0x08; // one above
gBuf.pOSD[audio] |= 0x04; // two above
if (gPlay.state == paused) // we have to draw ourselves
rb->lcd_update_rect(0, LCD_HEIGHT-8, LCD_WIDTH, 8);
else
gPlay.bDirtyOSD = true; // redraw it with next timer IRQ
}
// helper function to draw a position indicator
void DrawPosition(int pos, int total)
{
int w,h;
int sec; // estimated seconds
int percent;
/* print the estimated position */
sec = pos / (gFileHdr.bps_average/8);
if (sec < 100*60) /* fits into mm:ss format */
rb->snprintf(gPrint, sizeof(gPrint), "%02d:%02dm", sec/60, sec%60);
else /* a very long clip, hh:mm format */
rb->snprintf(gPrint, sizeof(gPrint), "%02d:%02dh", sec/3600, (sec/60)%60);
rb->lcd_puts(0, 7, gPrint);
/* draw a slider over the rest of the line */
rb->lcd_getstringsize(gPrint, &w, &h);
w++;
percent = pos/(total/100);
rb->slidebar(w, LCD_HEIGHT-7, LCD_WIDTH-w, 7, percent, Grow_Right);
if (gPlay.state == paused) // we have to draw ourselves
rb->lcd_update_rect(0, LCD_HEIGHT-8, LCD_WIDTH, 8);
else // let the display time do it
{
gPlay.nTimeOSD = 70;
gPlay.bDirtyOSD = true; // redraw it with next timer IRQ
}
}
// helper function to change the volume by a certain amount, +/-
void ChangeVolume(int delta)
{
int vol = rb->global_settings->volume + delta;
if (vol > 100) vol = 100;
else if (vol < 0) vol = 0;
if (vol != rb->global_settings->volume)
{
rb->mpeg_sound_set(SOUND_VOLUME, vol);
rb->global_settings->volume = vol;
rb->snprintf(gPrint, sizeof(gPrint), "Vol: %d", vol);
rb->lcd_puts(0, 7, gPrint);
if (gPlay.state == paused) // we have to draw ourselves
rb->lcd_update_rect(0, LCD_HEIGHT-8, LCD_WIDTH, 8);
else // let the display time do it
{
gPlay.nTimeOSD = 50; // display it for 50 frames
gPlay.bDirtyOSD = true; // let the refresh copy it to LCD
}
}
}
// helper function to change the LCD contrast by a certain amount, +/-
void ChangeContrast(int delta)
{
static int mycontrast = -1; /* the "permanent" value while running */
int contrast; /* updated value */
if (mycontrast == -1)
mycontrast = rb->global_settings->contrast;
contrast = mycontrast + delta;
if (contrast > 63) contrast = 63;
else if (contrast < 5) contrast = 5;
if (contrast != mycontrast)
{
rb->lcd_set_contrast(contrast);
mycontrast = contrast;
rb->snprintf(gPrint, sizeof(gPrint), "Contrast: %d", contrast);
rb->lcd_puts(0, 7, gPrint);
if (gPlay.state == paused) // we have to draw ourselves
rb->lcd_update_rect(0, LCD_HEIGHT-8, LCD_WIDTH, 8);
else // let the display time do it
{
gPlay.nTimeOSD = 50; // display it for 50 frames
gPlay.bDirtyOSD = true; // let the refresh copy it to LCD
}
}
}
// sync the video to the current audio
void SyncVideo(void)
{
tAudioFrameHeader* pAudioBuf;
pAudioBuf = (tAudioFrameHeader*)(gBuf.pReadAudio);
if (pAudioBuf->magic == AUDIO_MAGIC)
{
gBuf.vidcount = 0; // nothing known
// sync the video position
gBuf.pReadVideo = gBuf.pReadAudio +
(long)pAudioBuf->associated_video * (long)gFileHdr.blocksize;
// handle possible wrap
if (gBuf.pReadVideo >= gBuf.pBufEnd)
gBuf.pReadVideo -= gBuf.bufsize;
else if (gBuf.pReadVideo < gBuf.pBufStart)
gBuf.pReadVideo += gBuf.bufsize;
}
}
// timer interrupt handler to display a frame
void timer4_isr(void)
{
int available;
tAudioFrameHeader* pAudioBuf;
int height; // height to display
TSR4 &= ~0x01; // clear the interrupt
// xor_b(0x40, &PBDRL); // test: toggle LED (PB6)
// debug code
/*
gPlay.nTimeOSD = 1;
DrawBuf();
gPlay.bDirtyOSD = true;
*/
// reduce height if we have OSD on
height = gFileHdr.video_height/8;
if (gPlay.nTimeOSD > 0)
{
gPlay.nTimeOSD--;
height = MIN(LCD_HEIGHT/8-1, height); // reserve bottom line
if (gPlay.bDirtyOSD)
{ // OSD to bottom line
rb->lcd_blit(gBuf.pOSD, 0, LCD_HEIGHT/8-1,
LCD_WIDTH, 1, LCD_WIDTH);
gPlay.bDirtyOSD = false;
}
}
rb->lcd_blit(gBuf.pReadVideo, 0, 0,
gFileHdr.video_width, height, gFileHdr.video_width);
available = Available(gBuf.pReadVideo);
// loop to skip audio frame(s)
while(1)
{
// just for the statistics
if (!gBuf.bEOF && available < gStats.minVideoAvail)
gStats.minVideoAvail = available;
if (available <= (int)gFileHdr.blocksize)
{ // no data for next frame
if (gBuf.bEOF && (gFileHdr.flags & FLAG_LOOP))
{ // loop now, assuming the looped clip fits in memory
gBuf.pReadVideo = gBuf.pBufStart + gFileHdr.video_1st_frame;
// FixMe: pReadVideo is incremented below
}
else
{
gPlay.bVideoUnderrun = true;
rb->plugin_unregister_timer(); // disable ourselves
return; // no data available
}
}
else // normal advance for next time
{
gBuf.pReadVideo += gFileHdr.blocksize;
if (gBuf.pReadVideo >= gBuf.pBufEnd)
gBuf.pReadVideo -= gBuf.bufsize; // wraparound
available -= gFileHdr.blocksize;
}
if (!gPlay.bHasAudio)
break; // no need to skip any audio
if (gBuf.vidcount)
{
// we know the next is a video frame
gBuf.vidcount--;
break; // exit the loop
}
pAudioBuf = (tAudioFrameHeader*)(gBuf.pReadVideo);
if (pAudioBuf->magic == AUDIO_MAGIC)
{ // we ran into audio, can happen after seek
gBuf.vidcount = pAudioBuf->next_block;
if (gBuf.vidcount)
gBuf.vidcount--; // minus the audio block
}
} // while
}
// ISR function to get more mp3 data
void GetMoreMp3(unsigned char** start, int* size)
{
int available;
int advance;
tAudioFrameHeader* pAudioBuf = (tAudioFrameHeader*)(gBuf.pReadAudio);
advance = pAudioBuf->next_block * gFileHdr.blocksize;
available = Available(gBuf.pReadAudio);
// just for the statistics
if (!gBuf.bEOF && available < gStats.minAudioAvail)
gStats.minAudioAvail = available;
if (available < advance + (int)gFileHdr.blocksize || advance == 0)
{
gPlay.bAudioUnderrun = true;
return; // no data available
}
gBuf.pReadAudio += advance;
if (gBuf.pReadAudio >= gBuf.pBufEnd)
gBuf.pReadAudio -= gBuf.bufsize; // wraparound
*start = gBuf.pReadAudio + gFileHdr.audio_headersize;
*size = gFileHdr.blocksize - gFileHdr.audio_headersize;
}
int WaitForButton(void)
{
int button;
do
{
button = rb->button_get(true);
} while ((button & BUTTON_REL) && button != SYS_USB_CONNECTED);
return button;
}
bool WantResume(int fd)
{
int button;
rb->lcd_puts(0, 0, "Resume to this");
rb->lcd_puts(0, 1, "last position?");
rb->lcd_puts(0, 2, "PLAY = yes");
rb->lcd_puts(0, 3, "Any Other = no");
rb->lcd_puts(0, 4, " (plays from start)");
DrawPosition(gFileHdr.resume_pos, rb->filesize(fd));
rb->lcd_update();
button = WaitForButton();
return (button == BUTTON_PLAY);
}
int SeekTo(int fd, int nPos)
{
int read_now, got_now;
if (gPlay.bHasAudio)
rb->mp3_play_stop(); // stop audio ISR
if (gPlay.bHasVideo)
rb->plugin_unregister_timer(); // stop the timer
rb->lseek(fd, nPos, SEEK_SET);
gBuf.pBufFill = gBuf.pBufStart; // all empty
gBuf.pReadVideo = gBuf.pReadAudio = gBuf.pBufStart;
read_now = gBuf.low_water - 1; // less than low water, so loading will continue
read_now -= read_now % gBuf.granularity; // round down to granularity
got_now = rb->read(fd, gBuf.pBufFill, read_now);
gBuf.bEOF = (read_now != got_now);
gBuf.pBufFill += got_now;
if (nPos == 0)
{ // we seeked to the start
if (gPlay.bHasVideo)
gBuf.pReadVideo += gFileHdr.video_1st_frame;
if (gPlay.bHasAudio)
gBuf.pReadAudio += gFileHdr.audio_1st_frame;
}
else
{ // we have to search for the positions
if (gPlay.bHasAudio) // prepare audio playback, if contained
{
// search for audio frame
while (((tAudioFrameHeader*)(gBuf.pReadAudio))->magic != AUDIO_MAGIC)
gBuf.pReadAudio += gFileHdr.blocksize;
if (gPlay.bHasVideo)
SyncVideo(); // pick the right video for that
}
}
// synchronous start
gPlay.state = playing;
if (gPlay.bHasAudio)
{
gPlay.bAudioUnderrun = false;
rb->mp3_play_data(gBuf.pReadAudio + gFileHdr.audio_headersize,
gFileHdr.blocksize - gFileHdr.audio_headersize, GetMoreMp3);
rb->mp3_play_pause(true); // kickoff audio
}
if (gPlay.bHasVideo)
{
gPlay.bVideoUnderrun = false;
// start display interrupt
rb->plugin_register_timer(gFileHdr.video_frametime, 1, timer4_isr);
}
return 0;
}
// returns >0 if continue, =0 to stop, <0 to abort (USB)
int PlayTick(int fd)
{
int button;
int avail_audio = -1, avail_video = -1;
int retval = 1;
int filepos;
// check buffer level
if (gPlay.bHasAudio)
avail_audio = Available(gBuf.pReadAudio);
if (gPlay.bHasVideo)
avail_video = Available(gBuf.pReadVideo);
if ((gPlay.bHasAudio && avail_audio < gBuf.low_water)
|| (gPlay.bHasVideo && avail_video < gBuf.low_water))
{
gPlay.bRefilling = true; /* go to refill mode */
}
if ((!gPlay.bHasAudio || gPlay.bAudioUnderrun)
&& (!gPlay.bHasVideo || gPlay.bVideoUnderrun)
&& gBuf.bEOF)
{
if (gFileHdr.resume_pos)
{ // we played til the end, clear resume position
gFileHdr.resume_pos = 0;
rb->lseek(fd, 0, SEEK_SET); // save resume position
rb->write(fd, &gFileHdr, sizeof(gFileHdr));
}
return 0; // all expired
}
if (!gPlay.bRefilling || gBuf.bEOF)
{ // nothing to do
button = rb->button_get_w_tmo(HZ/10);
}
else
{ // refill buffer
int read_now, got_now;
int buf_free;
long spinup; // measure the spinup time
// how much can we reload, don't fill completely, would appear empty
buf_free = gBuf.bufsize - MAX(avail_audio, avail_video) - gBuf.high_water;
if (buf_free < 0)
buf_free = 0; // just for safety
buf_free -= buf_free % gBuf.granularity; // round down to granularity
// in one piece max. up to buffer end (wrap after that)
read_now = MIN(buf_free, gBuf.pBufEnd - gBuf.pBufFill);
// load piecewise, to stay responsive
read_now = MIN(read_now, gBuf.nReadChunk);
if (read_now == buf_free)
gPlay.bRefilling = false; // last piece requested
spinup = *rb->current_tick; // in case this is interesting below
got_now = rb->read(fd, gBuf.pBufFill, read_now);
if (got_now != read_now || read_now == 0)
{
gBuf.bEOF = true;
gPlay.bRefilling = false;
}
if (gPlay.bDiskSleep) // statistics about the spinup time
{
spinup = *rb->current_tick - spinup;
gPlay.bDiskSleep = false;
if (spinup > gStats.maxSpinup)
gStats.maxSpinup = spinup;
if (spinup < gStats.minSpinup)
gStats.minSpinup = spinup;
// recalculate the low water mark from real measurements
gBuf.low_water = (gStats.maxSpinup + gBuf.spinup_safety)
* gFileHdr.bps_peak / 8 / HZ;
}
if (!gPlay.bRefilling
&& rb->global_settings->disk_spindown < 20) // condition for test only
{
rb->ata_sleep(); // no point in leaving the disk run til timeout
gPlay.bDiskSleep = true;
}
gBuf.pBufFill += got_now;
if (gBuf.pBufFill >= gBuf.pBufEnd)
gBuf.pBufFill = gBuf.pBufStart; // wrap
rb->yield(); // have mercy with the other threads
button = rb->button_get(false);
}
// check keypresses
if (button != BUTTON_NONE)
{
filepos = rb->lseek(fd, 0, SEEK_CUR);
if (gPlay.bHasVideo) // video position is more accurate
filepos -= Available(gBuf.pReadVideo); // take video position
else
filepos -= Available(gBuf.pReadAudio); // else audio
switch (button)
{ // set exit conditions
case BUTTON_OFF:
if (gFileHdr.magic == HEADER_MAGIC // only if file has header
&& !(gFileHdr.flags & FLAG_LOOP)) // not for stills
{
gFileHdr.resume_pos = filepos;
rb->lseek(fd, 0, SEEK_SET); // save resume position
rb->write(fd, &gFileHdr, sizeof(gFileHdr));
}
retval = 0; // signal "stop" to caller
break;
case SYS_USB_CONNECTED:
retval = -1; // signal "abort" to caller
break;
case BUTTON_PLAY:
if (gPlay.bSeeking)
{
gPlay.bSeeking = false;
gPlay.state = playing;
SeekTo(fd, gPlay.nSeekPos);
}
else if (gPlay.state == playing)
{
gPlay.state = paused;
if (gPlay.bHasAudio)
rb->mp3_play_pause(false); // pause audio
if (gPlay.bHasVideo)
rb->plugin_unregister_timer(); // stop the timer
}
else if (gPlay.state == paused)
{
gPlay.state = playing;
if (gPlay.bHasAudio)
{
if (gPlay.bHasVideo)
SyncVideo();
rb->mp3_play_pause(true); // play audio
}
if (gPlay.bHasVideo)
{ // start the video
rb->plugin_register_timer(
gFileHdr.video_frametime, 1, timer4_isr);
}
}
break;
case BUTTON_UP:
case BUTTON_UP | BUTTON_REPEAT:
if (gPlay.bHasAudio)
ChangeVolume(1);
break;
case BUTTON_DOWN:
case BUTTON_DOWN | BUTTON_REPEAT:
if (gPlay.bHasAudio)
ChangeVolume(-1);
break;
case BUTTON_LEFT:
case BUTTON_LEFT | BUTTON_REPEAT:
if (!gPlay.bSeeking) // prepare seek
{
gPlay.nSeekPos = filepos;
gPlay.bSeeking = true;
gPlay.nSeekAcc = 0;
}
else if (gPlay.nSeekAcc > 0) // other direction, stop sliding
gPlay.nSeekAcc = 0;
else
gPlay.nSeekAcc--;
break;
case BUTTON_RIGHT:
case BUTTON_RIGHT | BUTTON_REPEAT:
if (!gPlay.bSeeking) // prepare seek
{
gPlay.nSeekPos = filepos;
gPlay.bSeeking = true;
gPlay.nSeekAcc = 0;
}
else if (gPlay.nSeekAcc < 0) // other direction, stop sliding
gPlay.nSeekAcc = 0;
else
gPlay.nSeekAcc++;
break;
case BUTTON_F1: // debug key
case BUTTON_F1 | BUTTON_REPEAT:
DrawBuf(); // show buffer status
gPlay.nTimeOSD = 30;
gPlay.bDirtyOSD = true;
break;
case BUTTON_F2: // contrast down
case BUTTON_F2 | BUTTON_REPEAT:
if (gPlay.bHasVideo)
ChangeContrast(-1);
break;
case BUTTON_F3: // contrast up
case BUTTON_F3 | BUTTON_REPEAT:
if (gPlay.bHasVideo)
ChangeContrast(1);
break;
}
} /* if (button != BUTTON_NONE) */
// handle seeking
if (gPlay.bSeeking) // seeking?
{
if (gPlay.nSeekAcc < -MAX_ACC)
gPlay.nSeekAcc = -MAX_ACC;
else if (gPlay.nSeekAcc > MAX_ACC)
gPlay.nSeekAcc = MAX_ACC;
gPlay.nSeekPos += gPlay.nSeekAcc * gBuf.nSeekChunk;
if (gPlay.nSeekPos < 0)
gPlay.nSeekPos = 0;
if (gPlay.nSeekPos > rb->filesize(fd) - gBuf.granularity)
{
gPlay.nSeekPos = rb->filesize(fd);
gPlay.nSeekPos -= gPlay.nSeekPos % gBuf.granularity;
}
DrawPosition(gPlay.nSeekPos, rb->filesize(fd));
}
// check + recover underruns
if ((gPlay.bAudioUnderrun || gPlay.bVideoUnderrun) && !gBuf.bEOF)
{
gBuf.spinup_safety += HZ/2; // add extra spinup time for the future
filepos = rb->lseek(fd, 0, SEEK_CUR);
if (gPlay.bHasVideo && gPlay.bVideoUnderrun)
{
gStats.nVideoUnderruns++;
filepos -= Available(gBuf.pReadVideo); // take video position
SeekTo(fd, filepos);
}
else if (gPlay.bHasAudio && gPlay.bAudioUnderrun)
{
gStats.nAudioUnderruns++;
filepos -= Available(gBuf.pReadAudio); // else audio
SeekTo(fd, filepos);
}
}
return retval;
}
int main(char* filename)
{
int file_size;
int fd; /* file descriptor handle */
int read_now, got_now;
int button = 0;
int retval;
// try to open the file
fd = rb->open(filename, O_RDWR);
if (fd < 0)
return PLUGIN_ERROR;
file_size = rb->filesize(fd);
// init statistics
rb->memset(&gStats, 0, sizeof(gStats));
gStats.minAudioAvail = gStats.minVideoAvail = INT_MAX;
gStats.minSpinup = INT_MAX;
// init playback state
rb->memset(&gPlay, 0, sizeof(gPlay));
// init buffer
rb->memset(&gBuf, 0, sizeof(gBuf));
gBuf.pOSD = rb->lcd_framebuffer + LCD_WIDTH*7; // last screen line
gBuf.pBufStart = rb->plugin_get_mp3_buffer(&gBuf.bufsize);
//gBuf.bufsize = 1700*1024; // test, like 2MB version!!!!
gBuf.pBufFill = gBuf.pBufStart; // all empty
// load file header
read_now = sizeof(gFileHdr);
got_now = rb->read(fd, &gFileHdr, read_now);
rb->lseek(fd, 0, SEEK_SET); // rewind to restart sector-aligned
if (got_now != read_now)
{
rb->close(fd);
return (PLUGIN_ERROR);
}
// check header
if (gFileHdr.magic != HEADER_MAGIC)
{ // old file, use default info
rb->memset(&gFileHdr, 0, sizeof(gFileHdr));
gFileHdr.blocksize = SCREENSIZE;
if (file_size < SCREENSIZE * FPS) // less than a second
gFileHdr.flags |= FLAG_LOOP;
gFileHdr.video_format = VIDEOFORMAT_RAW;
gFileHdr.video_width = LCD_WIDTH;
gFileHdr.video_height = LCD_HEIGHT;
gFileHdr.video_frametime = FREQ / FPS;
gFileHdr.bps_peak = gFileHdr.bps_average = LCD_WIDTH * LCD_HEIGHT * FPS;
}
// continue buffer init: align the end, calc low water, read sizes
gBuf.granularity = gFileHdr.blocksize;
while (gBuf.granularity % 512) // common multiple of sector size
gBuf.granularity *= 2;
gBuf.bufsize -= gBuf.bufsize % gBuf.granularity; // round down
gBuf.pBufEnd = gBuf.pBufStart + gBuf.bufsize;
gBuf.low_water = SPINUP_INIT * gFileHdr.bps_peak / 8000;
gBuf.spinup_safety = SPINUP_SAFETY * HZ / 1000; // in time ticks
if (gFileHdr.audio_min_associated < 0)
gBuf.high_water = 0 - gFileHdr.audio_min_associated;
else
gBuf.high_water = 1; // never fill buffer completely, would appear empty
gBuf.nReadChunk = (CHUNK + gBuf.granularity - 1); // round up
gBuf.nReadChunk -= gBuf.nReadChunk % gBuf.granularity;// and align
gBuf.nSeekChunk = rb->filesize(fd) / FF_TICKS;
gBuf.nSeekChunk += gBuf.granularity - 1; // round up
gBuf.nSeekChunk -= gBuf.nSeekChunk % gBuf.granularity; // and align
// prepare video playback, if contained
if (gFileHdr.video_format == VIDEOFORMAT_RAW)
{
gPlay.bHasVideo = true;
if (rb->global_settings->backlight_timeout > 0)
rb->backlight_set_timeout(1); // keep the light on
}
// prepare audio playback, if contained
if (gFileHdr.audio_format == AUDIOFORMAT_MP3_BITSWAPPED)
{
gPlay.bHasAudio = true;
}
// start playback by seeking to zero or resume position
if (gFileHdr.resume_pos && WantResume(fd)) // ask the user
SeekTo(fd, gFileHdr.resume_pos);
else
SeekTo(fd, 0);
// all that's left to do is keep the buffer full
do // the main loop
{
retval = PlayTick(fd);
} while (retval > 0);
rb->close(fd); // close the file
if (gPlay.bHasVideo)
rb->plugin_unregister_timer(); // stop video ISR, now I can use the display again
if (gPlay.bHasAudio)
rb->mp3_play_stop(); // stop audio ISR
// restore normal backlight setting
rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
// restore normal contrast
rb->lcd_set_contrast(rb->global_settings->contrast);
if (retval < 0) // aborted?
{
return PLUGIN_USB_CONNECTED;
}
#ifndef DEBUG // for release compilations, only display the stats in case of error
if (gStats.nAudioUnderruns || gStats.nVideoUnderruns)
#endif
{
// display statistics
rb->lcd_clear_display();
rb->snprintf(gPrint, sizeof(gPrint), "%d Audio Underruns", gStats.nAudioUnderruns);
rb->lcd_puts(0, 0, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "%d Video Underruns", gStats.nVideoUnderruns);
rb->lcd_puts(0, 1, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "%d MinAudio bytes", gStats.minAudioAvail);
rb->lcd_puts(0, 2, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "%d MinVideo bytes", gStats.minVideoAvail);
rb->lcd_puts(0, 3, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "MinSpinup %d.%02d", gStats.minSpinup/HZ, gStats.minSpinup%HZ);
rb->lcd_puts(0, 4, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "MaxSpinup %d.%02d", gStats.maxSpinup/HZ, gStats.maxSpinup%HZ);
rb->lcd_puts(0, 5, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "LowWater: %d", gBuf.low_water);
rb->lcd_puts(0, 6, gPrint);
rb->snprintf(gPrint, sizeof(gPrint), "HighWater: %d", gBuf.high_water);
rb->lcd_puts(0, 7, gPrint);
rb->lcd_update();
button = WaitForButton();
}
return (button == SYS_USB_CONNECTED) ? PLUGIN_USB_CONNECTED : PLUGIN_OK;
}
/***************** Plugin Entry Point *****************/
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
int ret;
/* this macro should be called as the first thing you do in the plugin.
it test that the api version and model the plugin was compiled for
matches the machine it is running on */
TEST_PLUGIN_API(api);
rb = api; // copy to global api pointer
if (parameter == NULL)
{
rb->splash(HZ*2, true, "Play .rvf file!");
return PLUGIN_ERROR;
}
// now go ahead and have fun!
ret = main((char*) parameter);
if (ret==PLUGIN_USB_CONNECTED)
rb->usb_screen();
return ret;
}
#endif // #ifdef HAVE_LCD_BITMAP
#endif // #ifndef SIMULATOR
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