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Implement seeking support

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28876 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
David McPaul 2009-01-11 07:06:51 +00:00
parent b459205340
commit 1a50289baa
2 changed files with 24 additions and 1 deletions
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23
src/add-ons/media/plugins/ac3_decoder/ac3_decoder.cpp
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@ -16,6 +16,9 @@
#include <malloc.h>
#include <string.h>
#include <stdio.h>
#include <ReaderPlugin.h>
#include "ac3_decoder.h"
@ -194,6 +197,8 @@ AC3Decoder::NegotiateOutputFormat(media_format *ioDecodedFormat)
ioDecodedFormat->u.raw_audio.buffer_size = 6 * 256 * fChannelCount * sizeof(float);
ioDecodedFormat->u.raw_audio.channel_mask = fChannelMask;
fFrameSize = (ioDecodedFormat->u.raw_audio.format & 0xf) * ioDecodedFormat->u.raw_audio.channel_count;
return B_OK;
}
@ -205,6 +210,24 @@ AC3Decoder::Seek(uint32 seekTo,
{
fInputChunkSize = 0;
fInputBufferSize = 0;
TRACE("AC3Decoder::Seek called\n");
if (seekTo == B_MEDIA_SEEK_TO_TIME) {
TRACE("AC3Decoder::Seek by time ");
TRACE("from frame %Ld and time %Ld TO Required Time %Ld. ", *frame, *time, seekTime);
*frame = (int64)(*time / (fFrameSize * 1000000.0 / fFrameRate));
} else if (seekTo == B_MEDIA_SEEK_TO_FRAME) {
TRACE("AC3Decoder::Seek by Frame ");
TRACE("from Current Time %Ld and frame %Ld TO Required Frame %Ld. ", *time, *frame, seekFrame);
*time = (bigtime_t)(*frame * fFrameSize * 1000000.0 / fFrameRate);
} else
return B_BAD_VALUE;
TRACE("so new frame is %Ld at time %Ld\n", *frame, *time);
return B_OK;
}

2
src/add-ons/media/plugins/ac3_decoder/ac3_decoder.h
View File

@ -72,7 +72,7 @@ private:
int fFlags;
int fFrameRate;
int fBitRate;
int fFrameSize;
int fChannelCount;
int fChannelMask;
int *fInterleaveOffset;