Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

This fixes most audio seeking problems with AVI files, but

Browse Source 
still needs some work. The sync code was never executed, as
if (len < chunkSize) (len = signed, chunkSize = unsigned) 
was compiled into an unsigned compare and thus always false
for len=-1.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21441 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2007-06-17 19:38:59 +00:00
parent f5390ac494
commit d85ccec96a
1 changed files with 47 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
View File

@ -29,7 +29,7 @@
#include <MediaRoster.h>
#include "mp3DecoderPlugin.h"
//#define TRACE_MP3_DECODER
#define TRACE_MP3_DECODER
#ifdef TRACE_MP3_DECODER
#define TRACE printf
#else
@ -182,11 +182,7 @@ mp3Decoder::Seek(uint32 seekTo,
int64 seekFrame, int64 *frame,
bigtime_t seekTime, bigtime_t *time)
{
ExitMP3(&fMpgLibPrivate);
InitMP3(&fMpgLibPrivate);
fResidualBytes = 0;
fNeedSync = true;
fDecodingError = false;
return B_OK;
}
@ -200,13 +196,24 @@ mp3Decoder::Decode(void *buffer, int64 *frameCount,
int32 out_bytes_needed = fOutputBufferSize;
int32 out_bytes = 0;
if (fDecodingError)
return B_ERROR;
mediaHeader->start_time = fStartTime;
//TRACE("mp3Decoder: Decoding start time %.6f\n", fStartTime / 1000000.0);
while (out_bytes_needed > 0) {
if (fNeedSync) {
TRACE("mp3Decoder::Decode: syncing...\n");
ExitMP3(&fMpgLibPrivate);
InitMP3(&fMpgLibPrivate);
fDecodingError = false;
fResidualBytes = 0;
mediaHeader->start_time = -1;
// fNeedSync is reset in DecodeNextChunk
}
if (fDecodingError)
return B_ERROR;
if (fResidualBytes) {
int32 bytes = min_c(fResidualBytes, out_bytes_needed);
memcpy(out_buffer, fResidualBuffer, bytes);
@ -227,6 +234,8 @@ mp3Decoder::Decode(void *buffer, int64 *frameCount,
fDecodingError = true;
break;
}
if (mediaHeader->start_time == -1)
mediaHeader->start_time = fStartTime;
}
*frameCount = out_bytes / fFrameSize;
@ -253,43 +262,57 @@ mp3Decoder::DecodeNextChunk()
}
// get another chunk and push it to the decoder
err = GetNextChunk(&chunkBuffer, &chunkSize, &mh);
if (err != B_OK)
return err;
fStartTime = mh.start_time;
// TRACE("mp3Decoder: fStartTime reset to %.6f\n", fStartTime / 1000000.0);
// resync after a seek
if (fNeedSync) {
TRACE("mp3Decoder::DecodeNextChunk: Syncing...\n");
if (chunkSize < 4) {
TRACE("mp3Decoder::Decode: Sync failed, frame too small\n");
TRACE("mp3Decoder::DecodeNextChunk: Sync failed, frame too small\n");
return B_ERROR;
}
int len = GetFrameLength(chunkBuffer);
// len = -1 when not at frame start
TRACE("mp3Decoder::DecodeNextChunk: chunkSize %d, first frame length %d\n", chunkSize, len);
// len == -1 when not at frame start
// len == chunkSize for mp3 reader (delivers single frames)
if (len < chunkSize) {
while (chunkSize > 100) {
if (IsValidStream((uint8 *)chunkBuffer, chunkSize))
if (len < (int)chunkSize) {
// FIXME: join a few chunks to create a larger (2k) buffer, and use:
// while (chunkSize > 100) {
// if (IsValidStream((uint8 *)chunkBuffer, chunkSize))
while (chunkSize >= 4) {
if (GetFrameLength(chunkBuffer) > 0)
break;
chunkBuffer = (uint8 *)chunkBuffer + 1;
chunkSize--;
}
if (chunkSize <= 100) {
TRACE("mp3Decoder::Decode: Sync failed\n");
// if (chunkSize <= 100) {
if (chunkSize == 3) {
TRACE("mp3Decoder::DecodeNextChunk: Sync failed\n");
return B_ERROR;
}
TRACE("mp3Decoder::DecodeNextChunk: new chunkSize %d, first frame length %d\n", chunkSize, GetFrameLength(chunkBuffer));
}
fNeedSync = false;
}
fStartTime = mh.start_time;
//TRACE("mp3Decoder: fStartTime reset to %.6f\n", fStartTime / 1000000.0);
result = decodeMP3(&fMpgLibPrivate, (char *)chunkBuffer, chunkSize, (char *)fDecodeBuffer, DECODE_BUFFER_SIZE, &outsize);
if (result == MP3_ERR) {
TRACE("mp3Decoder::Decode: decodeMP3 returned MP3_ERR\n");
if (result == MP3_NEED_MORE) {
TRACE("mp3Decoder::DecodeNextChunk: decodeMP3 returned MP3_NEED_MORE\n");
fResidualBuffer = NULL;
fResidualBytes = 0;
return B_OK;
} else if (result != MP3_OK) {
TRACE("mp3Decoder::DecodeNextChunk: decodeMP3 returned error %d\n", result);
return B_ERROR;
// fNeedSync = true;
// fResidualBuffer = NULL;
// fResidualBytes = 0;
// return B_OK;
}
//printf("mp3Decoder::Decode: decoded %d bytes into %d bytes\n",chunkSize, outsize);