diff options
Diffstat (limited to 'src/libmad/stream.c')
| -rw-r--r-- | src/libmad/stream.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/src/libmad/stream.c b/src/libmad/stream.c index 8bb4d6a49..e69de29bb 100644 --- a/src/libmad/stream.c +++ b/src/libmad/stream.c @@ -1,161 +0,0 @@ -/* - * libmad - MPEG audio decoder library - * Copyright (C) 2000-2004 Underbit Technologies, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * $Id: stream.c,v 1.12 2004/02/05 09:02:39 rob Exp $ - */ - -# ifdef HAVE_CONFIG_H -# include "config.h" -# endif - -# include "global.h" - -# include <stdlib.h> - -# include "bit.h" -# include "stream.h" - -/* - * NAME: stream->init() - * DESCRIPTION: initialize stream struct - */ -void mad_stream_init(struct mad_stream *stream) -{ - stream->buffer = 0; - stream->bufend = 0; - stream->skiplen = 0; - - stream->sync = 0; - stream->freerate = 0; - - stream->this_frame = 0; - stream->next_frame = 0; - mad_bit_init(&stream->ptr, 0); - - mad_bit_init(&stream->anc_ptr, 0); - stream->anc_bitlen = 0; - - stream->main_data = 0; - stream->md_len = 0; - - stream->options = 0; - stream->error = MAD_ERROR_NONE; -} - -/* - * NAME: stream->finish() - * DESCRIPTION: deallocate any dynamic memory associated with stream - */ -void mad_stream_finish(struct mad_stream *stream) -{ - if (stream->main_data) { - free(stream->main_data); - stream->main_data = 0; - } - - mad_bit_finish(&stream->anc_ptr); - mad_bit_finish(&stream->ptr); -} - -/* - * NAME: stream->buffer() - * DESCRIPTION: set stream buffer pointers - */ -void mad_stream_buffer(struct mad_stream *stream, - unsigned char const *buffer, unsigned long length) -{ - stream->buffer = buffer; - stream->bufend = buffer + length; - - stream->this_frame = buffer; - stream->next_frame = buffer; - - stream->sync = 1; - - mad_bit_init(&stream->ptr, buffer); -} - -/* - * NAME: stream->skip() - * DESCRIPTION: arrange to skip bytes before the next frame - */ -void mad_stream_skip(struct mad_stream *stream, unsigned long length) -{ - stream->skiplen += length; -} - -/* - * NAME: stream->sync() - * DESCRIPTION: locate the next stream sync word - */ -int mad_stream_sync(struct mad_stream *stream) -{ - register unsigned char const *ptr, *end; - - ptr = mad_bit_nextbyte(&stream->ptr); - end = stream->bufend; - - while (ptr < end - 1 && - !(ptr[0] == 0xff && (ptr[1] & 0xe0) == 0xe0)) - ++ptr; - - if (end - ptr < MAD_BUFFER_GUARD) - return -1; - - mad_bit_init(&stream->ptr, ptr); - - return 0; -} - -/* - * NAME: stream->errorstr() - * DESCRIPTION: return a string description of the current error condition - */ -char const *mad_stream_errorstr(struct mad_stream const *stream) -{ - switch (stream->error) { - case MAD_ERROR_NONE: return "no error"; - - case MAD_ERROR_BUFLEN: return "input buffer too small (or EOF)"; - case MAD_ERROR_BUFPTR: return "invalid (null) buffer pointer"; - - case MAD_ERROR_NOMEM: return "not enough memory"; - - case MAD_ERROR_LOSTSYNC: return "lost synchronization"; - case MAD_ERROR_BADLAYER: return "reserved header layer value"; - case MAD_ERROR_BADBITRATE: return "forbidden bitrate value"; - case MAD_ERROR_BADSAMPLERATE: return "reserved sample frequency value"; - case MAD_ERROR_BADEMPHASIS: return "reserved emphasis value"; - - case MAD_ERROR_BADCRC: return "CRC check failed"; - case MAD_ERROR_BADBITALLOC: return "forbidden bit allocation value"; - case MAD_ERROR_BADSCALEFACTOR: return "bad scalefactor index"; - case MAD_ERROR_BADMODE: return "bad bitrate/mode combination"; - case MAD_ERROR_BADFRAMELEN: return "bad frame length"; - case MAD_ERROR_BADBIGVALUES: return "bad big_values count"; - case MAD_ERROR_BADBLOCKTYPE: return "reserved block_type"; - case MAD_ERROR_BADSCFSI: return "bad scalefactor selection info"; - case MAD_ERROR_BADDATAPTR: return "bad main_data_begin pointer"; - case MAD_ERROR_BADPART3LEN: return "bad audio data length"; - case MAD_ERROR_BADHUFFTABLE: return "bad Huffman table select"; - case MAD_ERROR_BADHUFFDATA: return "Huffman data overrun"; - case MAD_ERROR_BADSTEREO: return "incompatible block_type for JS"; - } - - return 0; -} |