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fix bug where ...allocate_output_() might allocate the wrong number of channels if the decoder hit a bad frame header

This commit is contained in:
Josh Coalson 2001-03-23 20:20:43 +00:00
parent e850ded476
commit 1e1509fb35
1 changed files with 8 additions and 6 deletions
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14
src/libFLAC/stream_decoder.c
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@ -35,7 +35,7 @@ typedef struct FLAC__StreamDecoderPrivate {
FLAC__BitBuffer input;
int32 *output[FLAC__MAX_CHANNELS];
int32 *residual[FLAC__MAX_CHANNELS];
unsigned output_capacity;
unsigned output_capacity, output_channels;
uint32 last_frame_number;
uint64 samples_decoded;
bool has_stream_header;
@ -45,7 +45,7 @@ typedef struct FLAC__StreamDecoderPrivate {
static byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
static bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size);
static bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels);
static bool stream_decoder_find_metadata_(FLAC__StreamDecoder *decoder);
static bool stream_decoder_read_metadata_(FLAC__StreamDecoder *decoder);
static bool stream_decoder_skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
@ -144,6 +144,7 @@ FLAC__StreamDecoderState FLAC__stream_decoder_init(
}
decoder->guts->output_capacity = 0;
decoder->guts->output_channels = 0;
decoder->guts->last_frame_number = 0;
decoder->guts->samples_decoded = 0;
decoder->guts->has_stream_header = false;
@ -340,12 +341,12 @@ unsigned FLAC__stream_decoder_input_bytes_unconsumed(FLAC__StreamDecoder *decode
return decoder->guts->input.bytes - decoder->guts->input.consumed_bytes;
}
bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size)
bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
{
unsigned i;
int32 *tmp;
if(size <= decoder->guts->output_capacity)
if(size <= decoder->guts->output_capacity && channels <= decoder->guts->output_channels)
return true;
/* @@@ should change to use realloc() */
@ -361,7 +362,7 @@ bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size
}
}
for(i = 0; i < decoder->guts->frame.header.channels; i++) {
for(i = 0; i < channels; i++) {
tmp = (int32*)malloc(sizeof(int32)*size);
if(tmp == 0) {
decoder->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
@ -378,6 +379,7 @@ bool stream_decoder_allocate_output_(FLAC__StreamDecoder *decoder, unsigned size
}
decoder->guts->output_capacity = size;
decoder->guts->output_channels = channels;
return true;
}
@ -599,7 +601,7 @@ bool stream_decoder_read_frame_(FLAC__StreamDecoder *decoder, bool *got_a_frame)
decoder->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
if(!stream_decoder_allocate_output_(decoder, decoder->guts->frame.header.blocksize))
if(!stream_decoder_allocate_output_(decoder, decoder->guts->frame.header.blocksize, decoder->guts->frame.header.channels))
return false;
for(channel = 0; channel < decoder->guts->frame.header.channels; channel++) {
/*