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quartz: Generate a seek table for the mpeg splitter. 

Speeds up seeking mp3's on large files.
This commit is contained in:
Maarten Lankhorst 2008-04-08 12:28:09 -07:00 committed by Alexandre Julliard
parent 55f3ba9dc0
commit 24cac935f0
1 changed files with 51 additions and 10 deletions
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61
dlls/quartz/mpegsplit.c
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@ -52,6 +52,13 @@ WINE_DEFAULT_DEBUG_CHANNEL(quartz);
#define MPEG_AUDIO_HEADER 1
#define MPEG_NO_HEADER 0
#define SEEK_INTERVAL (ULONGLONG)(30 * 10000000) /* Add an entry every 30 seconds */
struct seek_entry {
ULONGLONG bytepos;
ULONGLONG timepos;
};
typedef struct MPEGSplitterImpl
{
ParserImpl Parser;
@ -63,6 +70,8 @@ typedef struct MPEGSplitterImpl
DWORD header_bytes;
DWORD remaining_bytes;
BOOL seek;
ULONG seek_entries;
struct seek_entry *seektable;
} MPEGSplitterImpl;
static int MPEGSplitter_head_check(const BYTE *header)
@ -649,11 +658,16 @@ static HRESULT MPEGSplitter_pre_connect(IPin *iface, IPin *pConnectPin)
This->header_bytes = pos;
This->skipbytes = 0;
This->seektable[0].bytepos = pos;
This->seektable[0].timepos = 0;
switch(streamtype)
{
case MPEG_AUDIO_HEADER:
{
LONGLONG duration = 0;
DWORD last_entry = 0;
DWORD ticks = GetTickCount();
hr = MPEGSplitter_init_audio(This, header, &piOutput, &amt);
@ -703,6 +717,25 @@ static HRESULT MPEGSplitter_pre_connect(IPin *iface, IPin *pConnectPin)
break;
}
pos += length;
if (This->seektable && (duration / SEEK_INTERVAL) > last_entry)
{
if (last_entry + 1 > duration / SEEK_INTERVAL)
{
ERR("Somehow skipped %d interval lengths instead of 1\n", (DWORD)(duration/SEEK_INTERVAL) - (last_entry + 1));
}
++last_entry;
TRACE("Entry: %u\n", last_entry);
if (last_entry >= This->seek_entries)
{
This->seek_entries += 64;
This->seektable = CoTaskMemRealloc(This->seektable, (This->seek_entries)*sizeof(struct seek_entry));
}
This->seektable[last_entry].bytepos = pos;
This->seektable[last_entry].timepos = duration;
}
TRACE("Pos: %x%08x/%x%08x\n", (DWORD)(pos >> 32), (DWORD)pos, (DWORD)(This->EndOfFile>>32), (DWORD)This->EndOfFile);
}
hr = S_OK;
@ -751,11 +784,6 @@ static HRESULT MPEGSplitter_seek(IBaseFilter *iface)
HRESULT hr = S_OK;
BYTE header[4];
/* Position, in bytes */
bytepos = This->header_bytes;
/* Position, in media time, current and new */
timepos = 0;
newpos = This->Parser.mediaSeeking.llCurrent;
if (newpos > This->duration)
@ -770,23 +798,28 @@ static HRESULT MPEGSplitter_seek(IBaseFilter *iface)
return S_OK;
}
/* Position, cached */
bytepos = This->seektable[newpos / SEEK_INTERVAL].bytepos;
timepos = This->seektable[newpos / SEEK_INTERVAL].timepos;
hr = IAsyncReader_SyncRead(pPin->pReader, bytepos, 4, header);
while (bytepos < This->EndOfFile && SUCCEEDED(hr))
while (timepos < newpos && bytepos + 3 < This->EndOfFile)
{
LONGLONG length = 0;
hr = IAsyncReader_SyncRead(pPin->pReader, bytepos, 4, header);
while (parse_header(header, &length, &timepos))
if (hr != S_OK)
break;
while (parse_header(header, &length, &timepos) && bytepos + 3 < This->EndOfFile)
{
/* No valid header yet; shift by a byte and check again */
memmove(header, header+1, 3);
hr = IAsyncReader_SyncRead(pPin->pReader, ++bytepos, 1, header + 3);
if (FAILED(hr))
if (hr != S_OK)
break;
}
bytepos += length;
TRACE("Pos: %x%08x/%x%08x\n", (DWORD)(bytepos >> 32), (DWORD)bytepos, (DWORD)(This->EndOfFile>>32), (DWORD)This->EndOfFile);
if (timepos >= newpos)
break;
}
if (SUCCEEDED(hr))
@ -836,6 +869,14 @@ HRESULT MPEGSplitter_create(IUnknown * pUnkOuter, LPVOID * ppv)
return E_OUTOFMEMORY;
ZeroMemory(This, sizeof(MPEGSplitterImpl));
This->seektable = CoTaskMemAlloc(sizeof(struct seek_entry) * 64);
if (!This->seektable)
{
CoTaskMemFree(This);
return E_OUTOFMEMORY;
}
This->seek_entries = 64;
hr = Parser_Create(&(This->Parser), &CLSID_MPEG1Splitter, MPEGSplitter_process_sample, MPEGSplitter_query_accept, MPEGSplitter_pre_connect, MPEGSplitter_cleanup, NULL, MPEGSplitter_seek, NULL);
if (FAILED(hr))
{