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Really strange workaround to read some strange files...

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Either the files are broken, or the GetFrameLength() function


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5630 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2003-12-08 21:17:35 +00:00
parent abc8999720
commit 37c555c2ca
1 changed files with 33 additions and 2 deletions
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35
src/add-ons/media/plugins/mp3_reader/MP3ReaderPlugin.cpp
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@ -187,6 +187,8 @@ mp3Reader::GetFileFormatInfo(media_file_format *mff)
int layer_index = (header[1] >> 1) & 0x03;
strcpy(mff->short_name, name_table[mpeg_version_index][layer_index]);
strcpy(mff->pretty_name, name_table[mpeg_version_index][layer_index]);
printf("mp3Reader: %s\n", name_table[mpeg_version_index][layer_index]);
}
@ -354,6 +356,22 @@ mp3Reader::GetNextChunk(void *cookie,
mediaHeader->start_time = (data->framePosition * 1000000) / data->frameRate;
mediaHeader->file_pos = data->position;
#if 0
// XXXX TEST
int size = min_c(MAX_CHUNK_SIZE - 16, maxbytes);
if (size != Source()->ReadAt(fDataStart + data->position, data->chunkBuffer,size)) {
TRACE("mp3Reader::GetNextChunk: unexpected read error\n");
return B_ERROR;
}
data->position += size;
data->framePosition += data->framesPerFrame;
*chunkBuffer = data->chunkBuffer;
*chunkSize = size;
return B_OK;
// XXXX TEST
#else
retry:
if (4 != Source()->ReadAt(fDataStart + data->position, data->chunkBuffer, 4)) {
TRACE("mp3Reader::GetNextChunk: unexpected read error\n");
@ -380,11 +398,21 @@ retry:
size = maxbytes;
if (size == 0)
return B_LAST_BUFFER_ERROR;
if (size != Source()->ReadAt(fDataStart + data->position, data->chunkBuffer + 4, size)) {
// XXX reads one byte more than needed to allow doing the check below
if (size > Source()->ReadAt(fDataStart + data->position, data->chunkBuffer + 4, size + 1)) {
TRACE("mp3Reader::GetNextChunk: unexpected read error\n");
return B_ERROR;
}
// XXX I found two files that need this, either they are broken,
// XXX or the GetFrameLength() function is bad
uint8 *d = (uint8 *)data->chunkBuffer;
if (d[4 + size - 1] == 0xff && d[4 + size] != 0xff && ((d[4 + size] & 0xe0) == 0xe0)) {
TRACE("mp3Reader::GetNextChunk: frame at %Ld: reported length %d, real length %d\n", data->position, size + 4, size + 3);
size--;
}
data->position += size;
data->framePosition += data->framesPerFrame;
@ -398,6 +426,7 @@ retry:
}
return B_OK;
#endif
}
bool
@ -407,6 +436,8 @@ mp3Reader::ResynchronizeStream(mp3data *data)
// XXX this is a hack and needs to be improved
data->position -= 16;
const int readmax = 16384;
uint8 buffer[readmax];