diff options
Diffstat (limited to 'plugins/dumb/dumb-kode54/src/helpers/riff.c')
| -rw-r--r-- | plugins/dumb/dumb-kode54/src/helpers/riff.c | 176 |
1 files changed, 88 insertions, 88 deletions
diff --git a/plugins/dumb/dumb-kode54/src/helpers/riff.c b/plugins/dumb/dumb-kode54/src/helpers/riff.c index 62a7eccc..7a7ef065 100644 --- a/plugins/dumb/dumb-kode54/src/helpers/riff.c +++ b/plugins/dumb/dumb-kode54/src/helpers/riff.c @@ -1,88 +1,88 @@ -#include "internal/riff.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-struct riff * riff_parse( unsigned char * ptr, unsigned size, unsigned proper )
-{
- unsigned stream_size;
- struct riff * stream;
-
- if ( size < 8 ) return 0;
-
- if ( ptr[0] != 'R' || ptr[1] != 'I' || ptr[2] != 'F' || ptr[3] != 'F' ) return 0;
-
- stream_size = ptr[4] | ( ptr[5] << 8 ) | ( ptr[6] << 16 ) | ( ptr[7] << 24 );
- if ( stream_size + 8 > size ) return 0;
- if ( stream_size < 4 ) return 0;
-
- stream = malloc( sizeof( struct riff ) );
- if ( ! stream ) return 0;
-
- stream->type = ( ptr[8] << 24 ) | ( ptr[9] << 16 ) | ( ptr[10] << 8 ) | ptr[11];
- stream->chunk_count = 0;
- stream->chunks = 0;
-
- ptr += 12;
- stream_size -= 4;
-
- while ( stream_size )
- {
- struct riff_chunk * chunk;
- if ( stream_size < 8 ) break;
- stream->chunks = realloc( stream->chunks, ( stream->chunk_count + 1 ) * sizeof( struct riff_chunk ) );
- if ( ! stream->chunks ) break;
- chunk = stream->chunks + stream->chunk_count;
- chunk->type = ( ptr[0] << 24 ) | ( ptr[1] << 16 ) | ( ptr[2] << 8 ) | ptr[3];
- chunk->size = ptr[4] | ( ptr[5] << 8 ) | ( ptr[6] << 16 ) | ( ptr[7] << 24 );
- ptr += 8;
- stream_size -= 8;
- if ( stream_size < chunk->size ) break;
- if ( chunk->type == 'RIFF' )
- {
- chunk->data = riff_parse( ptr - 8, chunk->size + 8, proper );
- if ( ! chunk->data ) break;
- }
- else
- {
- chunk->data = malloc( chunk->size );
- if ( ! chunk->data ) break;
- memcpy( chunk->data, ptr, chunk->size );
- }
- ptr += chunk->size;
- stream_size -= chunk->size;
- if ( proper && ( chunk->size & 1 ) )
- {
- ++ ptr;
- -- stream_size;
- }
- ++stream->chunk_count;
- }
-
- if ( stream_size )
- {
- riff_free( stream );
- stream = 0;
- }
-
- return stream;
-}
-
-void riff_free( struct riff * stream )
-{
- if ( stream )
- {
- if ( stream->chunks )
- {
- unsigned i;
- for ( i = 0; i < stream->chunk_count; ++i )
- {
- struct riff_chunk * chunk = stream->chunks + i;
- if ( chunk->type == 'RIFF' ) riff_free( ( struct riff * ) chunk->data );
- else free( chunk->data );
- }
- free( stream->chunks );
- }
- free( stream );
- }
-}
+#include "internal/riff.h" + +#include <stdlib.h> +#include <string.h> + +struct riff * riff_parse( unsigned char * ptr, unsigned size, unsigned proper ) +{ + unsigned stream_size; + struct riff * stream; + + if ( size < 8 ) return 0; + + if ( ptr[0] != 'R' || ptr[1] != 'I' || ptr[2] != 'F' || ptr[3] != 'F' ) return 0; + + stream_size = ptr[4] | ( ptr[5] << 8 ) | ( ptr[6] << 16 ) | ( ptr[7] << 24 ); + if ( stream_size + 8 > size ) return 0; + if ( stream_size < 4 ) return 0; + + stream = malloc( sizeof( struct riff ) ); + if ( ! stream ) return 0; + + stream->type = ( ptr[8] << 24 ) | ( ptr[9] << 16 ) | ( ptr[10] << 8 ) | ptr[11]; + stream->chunk_count = 0; + stream->chunks = 0; + + ptr += 12; + stream_size -= 4; + + while ( stream_size ) + { + struct riff_chunk * chunk; + if ( stream_size < 8 ) break; + stream->chunks = realloc( stream->chunks, ( stream->chunk_count + 1 ) * sizeof( struct riff_chunk ) ); + if ( ! stream->chunks ) break; + chunk = stream->chunks + stream->chunk_count; + chunk->type = ( ptr[0] << 24 ) | ( ptr[1] << 16 ) | ( ptr[2] << 8 ) | ptr[3]; + chunk->size = ptr[4] | ( ptr[5] << 8 ) | ( ptr[6] << 16 ) | ( ptr[7] << 24 ); + ptr += 8; + stream_size -= 8; + if ( stream_size < chunk->size ) break; + if ( chunk->type == 'RIFF' ) + { + chunk->data = riff_parse( ptr - 8, chunk->size + 8, proper ); + if ( ! chunk->data ) break; + } + else + { + chunk->data = malloc( chunk->size ); + if ( ! chunk->data ) break; + memcpy( chunk->data, ptr, chunk->size ); + } + ptr += chunk->size; + stream_size -= chunk->size; + if ( proper && ( chunk->size & 1 ) ) + { + ++ ptr; + -- stream_size; + } + ++stream->chunk_count; + } + + if ( stream_size ) + { + riff_free( stream ); + stream = 0; + } + + return stream; +} + +void riff_free( struct riff * stream ) +{ + if ( stream ) + { + if ( stream->chunks ) + { + unsigned i; + for ( i = 0; i < stream->chunk_count; ++i ) + { + struct riff_chunk * chunk = stream->chunks + i; + if ( chunk->type == 'RIFF' ) riff_free( ( struct riff * ) chunk->data ); + else free( chunk->data ); + } + free( stream->chunks ); + } + free( stream ); + } +} |