static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder);
+static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
+static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
+static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame);
FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
{
- FLAC__uint32 i, x, last_block, type, length;
- FLAC__uint64 xx;
+ FLAC__bool is_last;
+ FLAC__uint32 i, x, type, length;
FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &last_block, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder))
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder))
return false; /* the read_callback_ sets the state for us */
+ is_last = x? true : false;
+
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN, read_callback_, decoder))
return false; /* the read_callback_ sets the state for us */
+
if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN, read_callback_, decoder))
return false; /* the read_callback_ sets the state for us */
- if(type == FLAC__METADATA_TYPE_STREAMINFO) {
- unsigned used_bits = 0;
- decoder->private_->stream_info.type = (FLAC__MetadataType)type;
- decoder->private_->stream_info.is_last = last_block;
- decoder->private_->stream_info.length = length;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.min_blocksize = x;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.max_blocksize = x;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.min_framesize = x;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.max_framesize = x;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.sample_rate = x;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.channels = x+1;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
-
- if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- used_bits += FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
-
- if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- used_bits += 16*8;
- /* skip the rest of the block */
- FLAC__ASSERT(used_bits % 8 == 0);
- length -= (used_bits / 8);
- if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, 0, length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
+ if(type == FLAC__METADATA_TYPE_STREAMINFO) {
+ if(!read_metadata_streaminfo_(decoder, is_last, length))
+ return false;
decoder->private_->has_stream_info = true;
if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO])
decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
}
else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
- decoder->private_->seek_table.type = (FLAC__MetadataType)type;
- decoder->private_->seek_table.is_last = last_block;
- decoder->private_->seek_table.length = length;
-
- decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
-
- if(0 == (decoder->private_->seek_table.data.seek_table.points = (FLAC__StreamMetadata_SeekPoint*)malloc(decoder->private_->seek_table.data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint)))) {
- decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ if(!read_metadata_seektable_(decoder, is_last, length))
return false;
- }
- for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
- if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
-
- if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
-
- if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
- }
- length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
- /* if there is a partial point left, skip over it */
- if(length > 0) {
- /*@@@ do an error_callback() here? there's an argument for either way */
- if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, 0, length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- }
decoder->private_->has_seek_table = true;
if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE])
unsigned real_length = length;
FLAC__StreamMetadata block;
- block.is_last = last_block;
+ block.is_last = is_last;
block.type = (FLAC__MetadataType)type;
block.length = length;
block.data.application.data = 0;
break;
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
- /* read vendor string */
- FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
- if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &block.data.vorbis_comment.vendor_string.length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- if(block.data.vorbis_comment.vendor_string.length > 0) {
- if(0 == (block.data.vorbis_comment.vendor_string.entry = (FLAC__byte*)malloc(block.data.vorbis_comment.vendor_string.length))) {
- decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
- return false;
- }
- if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, block.data.vorbis_comment.vendor_string.entry, block.data.vorbis_comment.vendor_string.length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- }
- else
- block.data.vorbis_comment.vendor_string.entry = 0;
-
- /* read num comments */
- FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
- if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &block.data.vorbis_comment.num_comments, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
-
- /* read comments */
- if(block.data.vorbis_comment.num_comments > 0) {
- if(0 == (block.data.vorbis_comment.comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(block.data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
- decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
- return false;
- }
- for(i = 0; i < block.data.vorbis_comment.num_comments; i++) {
- FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
- if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &block.data.vorbis_comment.comments[i].length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- if(block.data.vorbis_comment.comments[i].length > 0) {
- if(0 == (block.data.vorbis_comment.comments[i].entry = (FLAC__byte*)malloc(block.data.vorbis_comment.comments[i].length))) {
- decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
- return false;
- }
- if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, block.data.vorbis_comment.comments[i].entry, block.data.vorbis_comment.comments[i].length, read_callback_, decoder))
- return false; /* the read_callback_ sets the state for us */
- }
- else
- block.data.vorbis_comment.comments[i].entry = 0;
- }
- }
- else {
- block.data.vorbis_comment.comments = 0;
- }
+ if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
+ return false;
break;
case FLAC__METADATA_TYPE_STREAMINFO:
case FLAC__METADATA_TYPE_SEEKTABLE:
}
}
- if(last_block)
+ if(is_last)
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
+FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
+{
+ FLAC__uint32 x;
+ unsigned bits, used_bits = 0;
+
+ FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
+
+ decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
+ decoder->private_->stream_info.is_last = is_last;
+ decoder->private_->stream_info.length = length;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, bits, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.min_blocksize = x;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.max_blocksize = x;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.min_framesize = x;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.max_framesize = x;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.sample_rate = x;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.channels = x+1;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
+ used_bits += bits;
+
+ bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
+ if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ used_bits += bits;
+
+ if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ used_bits += 16*8;
+
+ /* skip the rest of the block */
+ FLAC__ASSERT(used_bits % 8 == 0);
+ length -= (used_bits / 8);
+ if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, 0, length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+
+ return true;
+}
+
+FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
+{
+ FLAC__uint32 i, x;
+ FLAC__uint64 xx;
+
+ FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
+
+ decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
+ decoder->private_->seek_table.is_last = is_last;
+ decoder->private_->seek_table.length = length;
+
+ decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
+
+ if(0 == (decoder->private_->seek_table.data.seek_table.points = (FLAC__StreamMetadata_SeekPoint*)malloc(decoder->private_->seek_table.data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint)))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
+ if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
+
+ if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
+
+ if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
+ }
+ length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
+ /* if there is a partial point left, skip over it */
+ if(length > 0) {
+ /*@@@ do an error_callback() here? there's an argument for either way */
+ if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, 0, length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ }
+
+ return true;
+}
+
+FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
+{
+ FLAC__uint32 i;
+
+ FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
+
+ /* read vendor string */
+ FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
+ if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ if(obj->vendor_string.length > 0) {
+ if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ }
+ else
+ obj->vendor_string.entry = 0;
+
+ /* read num comments */
+ FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
+ if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->num_comments, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+
+ /* read comments */
+ if(obj->num_comments > 0) {
+ if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(obj->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ for(i = 0; i < obj->num_comments; i++) {
+ FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
+ if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->comments[i].length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ if(obj->comments[i].length > 0) {
+ if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length))) {
+ decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+ if(!FLAC__bitbuffer_read_byte_block_aligned(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length, read_callback_, decoder))
+ return false; /* the read_callback_ sets the state for us */
+ }
+ else
+ obj->comments[i].entry = 0;
+ }
+ }
+ else {
+ obj->comments = 0;
+ }
+
+ return true;
+}
+
FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
{
FLAC__uint32 x;