/* Gstreamer * Copyright (C) <2011> Intel * Copyright (C) <2011> Collabora Ltd. * Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifndef __PARSER_UTILS__ #define __PARSER_UTILS__ #include <gst/gst.h> #include <gst/base/gstbitreader.h> /* Parsing utils */ #define GET_BITS(b, num, bits) G_STMT_START { \ if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \ goto failed; \ GST_TRACE ("parsed %d bits: %d", num, *(bits)); \ } G_STMT_END #define CHECK_ALLOWED(val, min, max) G_STMT_START { \ if (val < min || val > max) { \ GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \ val, min, max); \ goto failed; \ } \ } G_STMT_END #define READ_UINT8(reader, val, nbits) G_STMT_START { \ if (!gst_bit_reader_get_bits_uint8 (reader, &val, nbits)) { \ GST_WARNING ("failed to read uint8, nbits: %d", nbits); \ goto failed; \ } \ } G_STMT_END #define READ_UINT16(reader, val, nbits) G_STMT_START { \ if (!gst_bit_reader_get_bits_uint16 (reader, &val, nbits)) { \ GST_WARNING ("failed to read uint16, nbits: %d", nbits); \ goto failed; \ } \ } G_STMT_END #define READ_UINT32(reader, val, nbits) G_STMT_START { \ if (!gst_bit_reader_get_bits_uint32 (reader, &val, nbits)) { \ GST_WARNING ("failed to read uint32, nbits: %d", nbits); \ goto failed; \ } \ } G_STMT_END #define READ_UINT64(reader, val, nbits) G_STMT_START { \ if (!gst_bit_reader_get_bits_uint64 (reader, &val, nbits)) { \ GST_WARNING ("failed to read uint64, nbits: %d", nbits); \ goto failed; \ } \ } G_STMT_END #define U_READ_UINT8(reader, val, nbits) G_STMT_START { \ val = gst_bit_reader_get_bits_uint8_unchecked (reader, nbits); \ } G_STMT_END #define U_READ_UINT16(reader, val, nbits) G_STMT_START { \ val = gst_bit_reader_get_bits_uint16_unchecked (reader, nbits); \ } G_STMT_END #define U_READ_UINT32(reader, val, nbits) G_STMT_START { \ val = gst_bit_reader_get_bits_uint32_unchecked (reader, nbits); \ } G_STMT_END #define U_READ_UINT64(reader, val, nbits) G_STMT_START { \ val = gst_bit_reader_get_bits_uint64_unchecked (reader, nbits); \ } G_STMT_END #define SKIP(reader, nbits) G_STMT_START { \ if (!gst_bit_reader_skip (reader, nbits)) { \ GST_WARNING ("failed to skip nbits: %d", nbits); \ goto failed; \ } \ } G_STMT_END typedef struct _VLCTable VLCTable; struct _VLCTable { guint value; guint cword; guint cbits; }; G_GNUC_INTERNAL gboolean decode_vlc (GstBitReader * br, guint * res, const VLCTable * table, guint length); #endif /* __PARSER_UTILS__ */