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GNU LESSER GENERAL PUBLIC LICENSE
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# User settings
CC = gcc
AR = ar
RANLIB = ranlib
INSTALL = install
CFLAGS = -Wall -Wshadow -g
INCLUDES = -I.
# Used for 'make install'. Change/overwrite as needed.
prefix = /usr/local
libdir = $(prefix)/lib
includedir = $(prefix)/include
# Don't change these settings
SOURCES = rmff.c mb_file_io.c
HEADERS = librmff.h mb_file_io.h
OBJECTS := $(patsubst %.c,%.o,$(SOURCES))
CFLAGS += -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
all: librmff.a
clean:
rm -f $(OBJECTS) librmff.a
%.o: %.c librmff.h
$(CC) -c -o $@ $(CFLAGS) $(INCLUDES) $<
librmff.a: $(OBJECTS)
$(AR) rcvu $@ $?
$(RANLIB) $@
install: all
@if ! test -d $(includedir); then \
echo $(INSTALL) -d $(includedir); \
$(INSTALL) -d $(includedir); \
fi
@for i in $(HEADERS); do \
echo $(INSTALL) $$i $(includedir); \
$(INSTALL) $$i $(includedir); \
done
@if ! test -d $(libdir); then \
echo $(INSTALL) -d $(libdir); \
$(INSTALL) -d $(libdir); \
fi
$(INSTALL) librmff.a $(libdir)

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librmff 0.1
===========
librmff is short for 'RealMedia file format access library'. It aims
at providing the programmer an easy way to read and write RealMedia
files. It does not contain any codecs for audio/video handling.
The library was written by Moritz Bunkus <moritz@bunkus.org>. It is
licensed under the terms of the GNU Lesser General Public License (GNU
LGPL) which can be found in the file COPYING.

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/* big endian system */
/* #undef WORDS_BIGENDIAN */

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librmff/librmff.h Normal file
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/*
* librmff.h
*
* Copyright (C) Moritz Bunkus - March 2004
*
* librmff is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1, or (at your option)
* any later version.
*
* librmff 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 Lesser General Public License
* along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/** \file librmff.h
* \brief The RealMedia file format library
* \author Moritz Bunkus <moritz@bunkus.org>
*/
#ifndef __RMFF_H
#define __RMFF_H
#if defined(__cplusplus)
extern "C" {
#endif
#include <inttypes.h>
#include <stdio.h>
#include "mb_file_io.h"
/** \brief Contains the PROP file header.
* This header is mandatory for a RealMedia file. It contains statistical
* and global data. Each member is in big endian.
*/
typedef struct {
uint32_t max_bit_rate;
uint32_t avg_bit_rate;
uint32_t max_packet_size;
uint32_t avg_packet_size;
uint32_t num_packets;
uint32_t duration;
uint32_t preroll;
uint32_t index_offset;
uint32_t data_offset;
uint16_t num_streams;
uint16_t flags;
} rmff_prop_t;
/** \brief Comments about the file in question.
* This structure contains the parsed values of the CONT header. These
* strings must not be modified by the application. The function
* rmff_set_cont_header(const_char*,const_char*,const_char*,const_char*)
* must be used instead.
*/
typedef struct {
char *title;
char *author;
char *copyright;
char *comment;
} rmff_cont_t;
typedef struct {
uint16_t id;
uint32_t max_bit_rate;
uint32_t avg_bit_rate;
uint32_t max_packet_size;
uint32_t avg_packet_size;
uint32_t start_time;
uint32_t preroll;
uint32_t duration;
char *name;
char *mime_type;
uint32_t type_specific_size;
unsigned char *type_specific_data;
} rmff_mdpr_t;
typedef struct __attribute__((__packed__)) real_video_props_t {
uint32_t size;
uint32_t fourcc1;
uint32_t fourcc2;
uint16_t width;
uint16_t height;
uint16_t bpp;
uint32_t unknown1;
uint32_t fps;
uint32_t type1;
uint32_t type2;
} real_video_props_t;
typedef struct __attribute__((__packed__)) real_audio_v4_props_t {
uint32_t fourcc1; /* '.', 'r', 'a', 0xfd */
uint16_t version1; /* 4 or 5 */
uint16_t unknown1; /* 00 00 */
uint32_t fourcc2; /* .ra4 or .ra5 */
uint32_t unknown2; /* ??? */
uint16_t version2; /* 4 or 5 */
uint32_t header_size; /* == 0x4e */
uint16_t flavor; /* codec flavor id */
uint32_t coded_frame_size; /* coded frame size */
uint32_t unknown3; /* big number */
uint32_t unknown4; /* bigger number */
uint32_t unknown5; /* yet another number */
uint16_t sub_packet_h;
uint16_t frame_size;
uint16_t sub_packet_size;
uint16_t unknown6; /* 00 00 */
uint16_t sample_rate;
uint16_t unknown8; /* 0 */
uint16_t sample_size;
uint16_t channels;
} real_audio_v4_props_t;
typedef struct __attribute__((__packed__)) real_audio_v5_props_t {
uint32_t fourcc1; /* '.', 'r', 'a', 0xfd */
uint16_t version1; /* 4 or 5 */
uint16_t unknown1; /* 00 00 */
uint32_t fourcc2; /* .ra4 or .ra5 */
uint32_t unknown2; /* ??? */
uint16_t version2; /* 4 or 5 */
uint32_t header_size; /* == 0x4e */
uint16_t flavor; /* codec flavor id */
uint32_t coded_frame_size; /* coded frame size */
uint32_t unknown3; /* big number */
uint32_t unknown4; /* bigger number */
uint32_t unknown5; /* yet another number */
uint16_t sub_packet_h;
uint16_t frame_size;
uint16_t sub_packet_size;
uint16_t unknown6; /* 00 00 */
uint8_t unknown7[6]; /* 0, srate, 0 */
uint16_t sample_rate;
uint16_t unknown8; /* 0 */
uint16_t sample_size;
uint16_t channels;
uint32_t genr; /* "genr" */
uint32_t fourcc3; /* fourcc */
} real_audio_v5_props_t;
typedef struct rmff_frame_t {
void *data;
uint32_t size;
int allocated_by_rmff;
uint16_t id;
uint32_t timecode;
uint8_t reserved;
uint8_t flags;
} rmff_frame_t;
/** \brief Unknown track type. */
#define RMFF_TRACK_TYPE_UNKNOWN 0
/** \brief The track contains audio data. */
#define RMFF_TRACK_TYPE_AUDIO 1
/** \brief The track contains video data. */
#define RMFF_TRACK_TYPE_VIDEO 2
struct rmff_file_t;
typedef struct {
uint32_t id;
int type;
rmff_mdpr_t mdpr_header;
int is_big_endian;
struct rmff_file_t *file;
} rmff_track_t;
typedef struct {
mb_file_io_t *io;
void *handle;
char *name;
int64_t size;
int headers_read;
rmff_prop_t prop_header;
int prop_header_found;
rmff_cont_t cont_header;
int cont_header_found;
int64_t first_data_header_offset;
int64_t next_data_header_offset;
uint32_t num_packets_in_chunk;
uint32_t num_packets_read;
int is_big_endian;
rmff_track_t *tracks;
int num_tracks;
} rmff_file_t;
/** \brief No error has occured. */
#define RMFF_ERR_OK 0
/** \brief The file is not a valid RealMedia file. */
#define RMFF_ERR_NOT_RMFF -1
/** \brief The structures/data read from the file were invalid. */
#define RMFF_ERR_DATA -2
/** \brief The end of the file has been reached. */
#define RMFF_ERR_EOF -3
/** \brief An error occured during file I/O. */
#define RMFF_ERR_IO -4
/** \brief The parameters were invalid. */
#define RMFF_ERR_PARAMETERS -5
/** \brief An error has occured for which \c errno should be consulted. */
#define RMFF_ERR_CHECK_ERRNO -6
#define rmffFOURCC(a, b, c, d) (uint32_t)((((unsigned char)a) << 24) + \
(((unsigned char)b) << 16) + \
(((unsigned char)c) << 8) + \
((unsigned char)d))
/** \brief Opens a RealMedia file for reading or writing.
* Can be used to open an existing file for reading or for creating a new
* file. The file headers will neither be read nor written automatically.
* This function uses the standard file I/O functions provided by the
* current operating system.
*
* \param path the name of the file that should be opened
* \param mode either ::RMFF_OPEN_MODE_READING or ::RMFF_OPEN_MODE_WRITING
* \returns a pointer to \c rmff_file_t structure or \c NULL if an error
* occured. In the latter case ::rmff_last_error will be set.
* \see rmff_open_file_with_io
*/
rmff_file_t *rmff_open_file(const char *path, int mode);
/** \brief Opens a RealMedia file for reading or writing.
* Can be used to open an existing file for reading or for creating a new
* file. The file headers will neither be read nor written automatically.
* This function uses I/O functions provided by the \c io parameter.
*
* \param path the name of the file that should be opened
* \param mode either ::RMFF_OPEN_MODE_READING or ::RMFF_OPEN_MODE_WRITING
* \param io a set of I/O functions
* \returns a pointer to a rmff_file_t structure or \c NULL if an error
* occured. In the latter case ::rmff_last_error will be set.
* \see rmff_open_file
*/
rmff_file_t *rmff_open_file_with_io(const char *path, int mode,
mb_file_io_t *io);
/** \brief Close the file and release all resources.
* Closes the file and releases all resources associated with it, including
* the \c file structure. If the file was open for writing then
* rmff_write_headers() should be called prior to closing the file as
* \c rmff_close_file does not fix the headers itself.
*
* \param file The file to close.
*/
void rmff_close_file(rmff_file_t *file);
/** \brief Reads the file and track headers.
* This function should be called after directly after opening it for reading.
* It will try to read the file and track headers and position the file pointer
* right before the first data packet.
*
* \param file The file to read the headers from.
* \returns ::RMFF_ERR_OK on success and one of the other \c RMFF_ERR_*
* constants on error.
*/
int rmff_read_headers(rmff_file_t *file);
/** \brief Retrieves the size of the next frame.
* \param file The file to read from.
* \returns the size of the following frame or one of the \c RMFF_ERR_*
* constants on error.
*/
int rmff_get_next_frame_size(rmff_file_t *file);
/** \brief Reads the next frame from the file.
* The frame must be released by rmff_release_frame(rmff_frame_t*).
* \param file The file to read from.
* \param buffer A buffer to read the frame into. This parameter may be
* \c NULL in which case the buffer will be allocated by the library.
* If the application provides the buffer it must be large enough.
* The function rmff_get_next_frame_size() can be used in this case.
* \returns a pointer to a ::rmff_frame_t structure containing the frame
* and its metadata on success or \c NULL if the call failed. This frame
* must be freed with rmff_release_frame(rmff_frame_t*).
*/
rmff_frame_t *rmff_read_next_frame(rmff_file_t *file, void *buffer);
/** \brief Frees all resources associated with a frame.
* If the frame buffer was allocated by the library it will be freed as well.
* \param frame The frame to free.
*/
void rmff_release_frame(rmff_frame_t *frame);
/** \brief The error code of the last function call.
* Contains the last error code for a function that failed. If a function
* succeeded it usually does not reset \c rmff_last_error to \c RMFF_ERR_OK.
* This variable can contain one of the \c RMFF_ERR_* constants.
*/
extern int rmff_last_error;
/** \brief The error message of the last function call.
* Contains the last error message for a function that failed. If a function
* succeeded it usually does not reset \c rmff_last_error_msg to \c NULL.
*/
extern const char *rmff_last_error_msg;
/** \brief Map an error code to an error message.
* Returns the error message that corresponds to the error code.
* \param code the error code which must be one of the \c RMFF_ERR_* macros.
* \returns the error message or "Unknown error" for unknown error codes,
* but never \c NULL.
*/
const char *rmff_get_error_str(int code);
#if defined(__cplusplus)
}
#endif
#endif /* __RMFF_H */

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/*
* mb_file_io.c
*
* Copyright (C) Moritz Bunkus - March 2004
*
* mb_file_io is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1, or (at your option)
* any later version.
*
* mb_file_io 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 Lesser General Public License
* along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "os.h"
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mb_file_io.h"
#if defined(SYS_WINDOWS)
#include <stdarg.h>
#include <windef.h>
#include <winbase.h>
#include <wingdi.h>
#include <winuser.h>
static void *
mb_std_file_open(const char *path,
int mode) {
DWORD access_mode, share_mode, disposition;
void *file;
switch (mode) {
case MB_OPEN_MODE_READING:
access_mode = GENERIC_READ;
share_mode = FILE_SHARE_READ | FILE_SHARE_WRITE;
disposition = OPEN_EXISTING;
break;
case MB_OPEN_MODE_WRITING:
access_mode = GENERIC_WRITE;
share_mode = 0;
disposition = OPEN_ALWAYS;
break;
default:
return NULL;
}
file = (void *)CreateFile(path, access_mode, share_mode, NULL, disposition,
0, NULL);
if ((HANDLE)file == (HANDLE)0xFFFFFFFF)
return NULL;
return file;
}
static int
mb_std_file_close(void *file) {
if (file == NULL)
return -1;
CloseHandle((HANDLE)file);
return 0;
}
static int64_t
mb_std_file_tell(void *file) {
LONG high = 0;
DWORD low;
if (file == NULL)
return -1;
low = SetFilePointer((HANDLE)file, 0, &high, FILE_CURRENT);
if ((low == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
return -1;
return (((int64_t)high) << 32) | (int64_t)low;
}
static int64_t
mb_std_file_seek(void *file,
int64_t offset,
int whence) {
DWORD method;
LONG high;
if (file == NULL)
return -1;
switch (whence) {
case SEEK_SET:
method = FILE_BEGIN;
break;
case SEEK_CUR:
method = FILE_CURRENT;
break;
case SEEK_END:
method = FILE_END;
break;
default:
return -1;
}
high = (LONG)(offset >> 32);
SetFilePointer((HANDLE)file, (LONG)(offset & 0xffffffff), &high, method);
return 0;
}
static int64_t
mb_std_file_read(void *file,
void *buffer,
int64_t bytes) {
DWORD bytes_read;
if (!ReadFile((HANDLE)file, buffer, bytes, &bytes_read, NULL))
return -1;
return bytes_read;
}
static int64_t
mb_std_file_write(void *file,
const void *buffer,
int64_t bytes) {
DWORD bytes_written;
if (!WriteFile((HANDLE)file, buffer, bytes, &bytes_written, NULL))
bytes_written = 0;
return bytes_written;
}
#else /* SYS_WINDOWS */
static void *
mb_std_file_open(const char *path,
int mode) {
FILE *f;
const char *c_mode;
if (mode == MB_OPEN_MODE_READING)
c_mode = "rb";
else if (mode == MB_OPEN_MODE_WRITING)
c_mode = "wb";
else
return NULL;
f = fopen(path, c_mode);
return f;
}
static int
mb_std_file_close(void *file) {
if (file == NULL)
return -1;
return fclose((FILE *)file);
}
static int64_t
mb_std_file_read(void *file,
void *buffer,
int64_t bytes) {
if ((file == NULL) || (buffer == NULL) || (bytes < 0))
return -1;
return fread(buffer, 1, bytes, (FILE *)file);
}
static int64_t
mb_std_file_write(void *file,
const void *buffer,
int64_t bytes) {
if ((file == NULL) || (buffer == NULL) || (bytes < 0))
return -1;
return fwrite(buffer, 1, bytes, (FILE *)file);
}
static int64_t
mb_std_file_tell(void *file) {
if (file == NULL)
return -1;
return ftello((FILE *)file);
}
static int64_t
mb_std_file_seek(void *file,
int64_t offset,
int whence) {
if ((file == NULL) || (offset < 0) || /* */
((whence != SEEK_SET) && (whence != SEEK_CUR) &&
(whence != SEEK_END)))
return -1;
return fseeko((FILE *)file, offset, whence);
}
#endif /* SYS_WINDOWS */
mb_file_io_t std_mb_file_io = {
mb_std_file_open,
mb_std_file_close,
mb_std_file_read,
mb_std_file_write,
mb_std_file_tell,
mb_std_file_seek
};

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/*
* mb_file_io.h
*
* Copyright (C) Moritz Bunkus - March 2004
*
* mb_file_io is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1, or (at your option)
* any later version.
*
* mb_file_io 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 Lesser General Public License
* along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __MB_FILE_IO_H
#define __MB_FILE_IO_H
#include <inttypes.h>
#define MB_OPEN_MODE_READING 0
#define MB_OPEN_MODE_WRITING 1
typedef void *(*mb_file_open_t)(const char *path, int mode);
typedef int (*mb_file_close_t)(void *file);
typedef int64_t (*mb_file_read_t)(void *file, void *buffer, int64_t bytes);
typedef int64_t (*mb_file_write_t)(void *file, const void *buffer,
int64_t bytes);
typedef int64_t (*mb_file_tell_t)(void *file);
typedef int64_t (*mb_file_seek_t)(void *file, int64_t offset, int whence);
typedef struct {
mb_file_open_t open;
mb_file_close_t close;
mb_file_read_t read;
mb_file_write_t write;
mb_file_tell_t tell;
mb_file_seek_t seek;
} mb_file_io_t;
extern mb_file_io_t std_mb_file_io;
#endif /* __MB_FILE_IO */

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#ifndef __OS_H
#define __OS_H
#include "config.h"
#if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
# define SYS_WINDOWS
# if defined __MINGW32__
# define COMP_MINGW
# elif defined __CYGWIN__
# define COMP_CYGWIN
# else
# define COMP_MSC
# endif
#elif defined(__APPLE__)
# define SYS_APPLE
#else
# define COMP_GCC
# define SYS_UNIX
# if defined(__bsdi__) || defined(__FreeBSD__)
# define SYS_BSD
# else
# define SYS_LINUX
# endif
#endif
#if defined(COMP_MSC)
# define PACKAGE "mkvtoolnix"
# define VERSION "0.8.6"
# define strncasecmp _strnicmp
# define strcasecmp _stricmp
# define nice(a)
# define vsnprintf _vsnprintf
# define vfprintf _vfprintf
#endif // COMP_MSC
#if defined(COMP_MINGW) || defined(COMP_MSC)
// For DLL stuff...
# if defined(MTX_DLL)
# if defined(MTX_DLL_EXPORT)
# define MTX_DLL_API __declspec(dllexport)
# else // MTX_DLL_EXPORT
# define MTX_DLL_API __declspec(dllimport)
# endif
# else // MTX_DLL
# define MTX_DLL_API
# endif
# define LLD "%I64d"
# define LLU "%I64u"
#else // COMP_MINGW || COMP_MSC
# define MTX_DLL_API
# define LLD "%lld"
# define LLU "%llu"
#endif // COMP_MINGW || COMP_MSC
#if defined(HAVE_STDINT_H)
#include <stdint.h>
#endif // HAVE_STDINT_H
#if defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#endif // HAVE_INTTYPES_H
#if defined(SYS_WINDOWS)
# define PATHSEP '\\'
#else
# define PATHSEP '/'
#endif
#if defined(WORDS_BIGENDIAN) && (WORDS_BIGENDIAN == 1)
# define ARCH_BIGENDIAN
#else
# define ARCH_LITTLEENDIAN
#endif
#endif

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/*
* rmff.c
*
* Copyright (C) Moritz Bunkus - March 2004
*
* librmff is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1, or (at your option)
* any later version.
*
* librmff 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 Lesser General Public License
* along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "librmff.h"
int rmff_last_error = RMFF_ERR_OK;
const char *rmff_last_error_msg = NULL;
static const char *rmff_std_error_messages[] = {
"No error",
"File is not a RealMedia file",
"Inconsistent data found in file",
"End of file reached",
"Input/output error",
"Invalid parameters"
};
const char *
rmff_get_error_str(int code) {
code *= -1;
if ((code >= 0) && (code <= 5))
return rmff_std_error_messages[code];
else
return "Unknown error";
}
static int
set_error(int error_number,
const char *error_msg,
int return_value) {
rmff_last_error = error_number;
if (error_msg == NULL)
rmff_last_error_msg = rmff_get_error_str(error_number);
else
rmff_last_error_msg = error_msg;
return return_value;
}
static uint16_t
get_uint16_be(const void *buf) {
uint16_t ret;
unsigned char *tmp;
tmp = (unsigned char *) buf;
ret = tmp[0] & 0xff;
ret = (ret << 8) + (tmp[1] & 0xff);
return ret;
}
static uint32_t
get_uint32_be(const void *buf) {
uint32_t ret;
unsigned char *tmp;
tmp = (unsigned char *) buf;
ret = tmp[0] & 0xff;
ret = (ret << 8) + (tmp[1] & 0xff);
ret = (ret << 8) + (tmp[2] & 0xff);
ret = (ret << 8) + (tmp[3] & 0xff);
return ret;
}
static void
put_uint16_be(void *buf,
uint16_t value) {
unsigned char *tmp;
tmp = (unsigned char *) buf;
tmp[1] = value & 0xff;
tmp[0] = (value >>= 8) & 0xff;
}
static void
put_uint32_be(void *buf,
uint32_t value) {
unsigned char *tmp;
tmp = (unsigned char *) buf;
tmp[3] = value & 0xff;
tmp[2] = (value >>= 8) & 0xff;
tmp[1] = (value >>= 8) & 0xff;
tmp[0] = (value >>= 8) & 0xff;
}
#define read_uint8() file_read_uint8(io, fh)
#define read_uint16_be() file_read_uint16_be(io, fh)
#define read_uint32_be() file_read_uint32_be(io, fh)
#define read_uint16_be_to(addr) put_uint16_be(addr, read_uint16_be())
#define read_uint32_be_to(addr) put_uint32_be(addr, read_uint32_be())
#define get_fourcc(b) get_uint32_be(b)
static uint8_t
file_read_uint8(mb_file_io_t *io,
void *fh) {
unsigned char tmp;
io->read(fh, &tmp, 1);
return tmp;
}
static uint16_t
file_read_uint16_be(mb_file_io_t *io,
void *fh) {
unsigned char tmp[2];
io->read(fh, tmp, 2);
return get_uint16_be(tmp);
}
static uint32_t
file_read_uint32_be(mb_file_io_t *io,
void *fh) {
unsigned char tmp[4];
io->read(fh, tmp, 4);
return get_uint32_be(tmp);
}
void
die(const char *fmt,
...) {
va_list ap;
fprintf(stderr, "'die' called: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
#define safestrdup(s) _safestrdup(s, __FILE__, __LINE__)
#define safememdup(s, b) _safememdup(s, b, __FILE__, __LINE__)
#define safemalloc(s) _safemalloc(s, __FILE__, __LINE__)
#define safecalloc(s) _safecalloc(s, __FILE__, __LINE__)
#define saferealloc(s, b) _saferealloc(s, b, __FILE__, __LINE__)
#define safefree(s) { if ((s) != NULL) free(s); }
static char *
_safestrdup(const char *s,
const char *file,
int line) {
char *copy;
if (s == NULL)
return NULL;
copy = strdup(s);
if (copy == NULL)
die("safestrdup() called from file %s, line %d: strdup() "
"returned NULL for '%s'.", file, line, s);
return copy;
}
/* static void * */
/* _safememdup(const void *s, */
/* size_t size, */
/* const char *file, */
/* int line) { */
/* void *copy; */
/* if (s == NULL) */
/* return NULL; */
/* copy = malloc(size); */
/* if (copy == NULL) */
/* die("safememdup() called from file %s, line %d: malloc() " */
/* "returned NULL for a size of %d bytes.", file, line, size); */
/* memcpy(copy, s, size); */
/* return copy; */
/* } */
static void *
_safemalloc(size_t size,
const char *file,
int line) {
void *mem;
mem = malloc(size);
if (mem == NULL)
die("safemalloc() called from file %s, line %d: malloc() "
"returned NULL for a size of %d bytes.", file, line, size);
return mem;
}
static void *_safecalloc(size_t size,
const char *file,
int line) {
void *mem;
mem = calloc(size, 1);
if (mem == NULL)
die("safemalloc() called from file %s, line %d: malloc() "
"returned NULL for a size of %d bytes.", file, line, size);
return mem;
}
static void *
_saferealloc(void *mem,
size_t size,
const char *file,
int line) {
mem = realloc(mem, size);
if (mem == NULL)
die("saferealloc() called from file %s, line %d: realloc() "
"returned NULL for a size of %d bytes.", file, line, size);
return mem;
}
rmff_file_t *
rmff_open_file(const char *path,
int mode) {
return rmff_open_file_with_io(path, mode, &std_mb_file_io);
}
rmff_file_t *
rmff_open_file_with_io(const char *path,
int mode,
mb_file_io_t *io) {
rmff_file_t *file;
void *file_h;
char buf[5];
if ((path == NULL) || (io == NULL) ||
((mode != MB_OPEN_MODE_READING) && (mode != MB_OPEN_MODE_WRITING)))
return (rmff_file_t *)set_error(RMFF_ERR_PARAMETERS, NULL, 0);
file_h = io->open(path, mode);
if (file_h == NULL)
return NULL;
buf[4] = 0;
if ((io->read(file_h, buf, 4) != 4) ||
strcmp(buf, ".RMF")) {
io->close(file_h);
return (rmff_file_t *)set_error(RMFF_ERR_NOT_RMFF, NULL, 0);
}
file = (rmff_file_t *)safecalloc(sizeof(rmff_file_t));
file->handle = file_h;
file->name = safestrdup(path);
file->io = io;
io->seek(file_h, 0, SEEK_END);
file->size = io->tell(file_h);
io->seek(file_h, 4, SEEK_SET);
return file;
}
void
rmff_free_track_data(rmff_track_t *track) {
if (track == NULL)
return;
safefree(track->mdpr_header.name);
safefree(track->mdpr_header.mime_type);
safefree(track->mdpr_header.type_specific_data);
}
void
rmff_close_file(rmff_file_t *file) {
int i;
if (file == NULL)
return;
safefree(file->name);
for (i = 0; i < file->num_tracks; i++)
rmff_free_track_data(&file->tracks[i]);
safefree(file->tracks);
safefree(file->cont_header.title);
safefree(file->cont_header.author);
safefree(file->cont_header.copyright);
safefree(file->cont_header.comment);
file->io->close(file->handle);
safefree(file);
}
#define skip(num) { if (io->seek(fh, num, SEEK_CUR) != 0) \
return set_error(RMFF_ERR_IO, NULL, -1); }
int
rmff_read_headers(rmff_file_t *file) {
mb_file_io_t *io;
void *fh;
uint32_t object_id, object_size, size;
uint16_t object_version;
rmff_prop_t *prop;
rmff_cont_t *cont;
rmff_mdpr_t *mdpr;
rmff_track_t track;
real_video_props_t *rvp;
real_audio_v4_props_t *ra4p;
if (file == NULL)
return set_error(RMFF_ERR_PARAMETERS, NULL, RMFF_ERR_PARAMETERS);
if (file->headers_read)
return 0;
io = file->io;
fh = file->handle;
if (io->seek(fh, 4, SEEK_SET))
return set_error(RMFF_ERR_IO, NULL, -1);
skip(4); /* header_size */
skip(2); /* object_version */
skip(4); /* file_version */
skip(4); /* num_headers */
prop = &file->prop_header;
cont = &file->cont_header;
while (1) {
rmff_last_error = RMFF_ERR_OK;
object_id = read_uint32_be();
object_size = read_uint32_be();
object_version = read_uint16_be();
if (rmff_last_error != RMFF_ERR_OK)
break;
if (object_id == rmffFOURCC('P', 'R', 'O', 'P')) {
read_uint32_be_to(&prop->max_bit_rate);
read_uint32_be_to(&prop->avg_bit_rate);
read_uint32_be_to(&prop->max_packet_size);
read_uint32_be_to(&prop->avg_packet_size);
read_uint32_be_to(&prop->num_packets);
read_uint32_be_to(&prop->duration);
read_uint32_be_to(&prop->preroll);
read_uint32_be_to(&prop->index_offset);
read_uint32_be_to(&prop->data_offset);
read_uint16_be_to(&prop->num_streams);
read_uint16_be_to(&prop->flags);
file->prop_header_found = 1;
} else if (object_id == rmffFOURCC('C', 'O', 'N', 'T')) {
if (file->cont_header_found) {
safefree(cont->title);
safefree(cont->author);
safefree(cont->copyright);
safefree(cont->comment);
}
memset(cont, 0, sizeof(rmff_cont_t));
size = read_uint16_be(); /* title_len */
if (size > 0) {
cont->title = (char *)safemalloc(size + 1);
io->read(fh, cont->title, size);
}
size = read_uint16_be(); /* author_len */
if (size > 0) {
cont->author = (char *)safemalloc(size + 1);
io->read(fh, cont->author, size);
}
size = read_uint16_be(); /* copyright_len */
if (size > 0) {
cont->copyright = (char *)safemalloc(size + 1);
io->read(fh, cont->copyright, size);
}
size = read_uint16_be(); /* comment_len */
if (size > 0) {
cont->comment = (char *)safemalloc(size + 1);
io->read(fh, cont->comment, size);
}
file->cont_header_found = 1;
} else if (object_id == rmffFOURCC('M', 'D', 'P', 'R')) {
memset(&track, 0, sizeof(rmff_track_t));
track.file = (struct rmff_file_t *)file;
mdpr = &track.mdpr_header;
read_uint16_be_to(&mdpr->id);
read_uint32_be_to(&mdpr->max_bit_rate);
read_uint32_be_to(&mdpr->avg_bit_rate);
read_uint32_be_to(&mdpr->max_packet_size);
read_uint32_be_to(&mdpr->avg_packet_size);
read_uint32_be_to(&mdpr->start_time);
read_uint32_be_to(&mdpr->preroll);
read_uint32_be_to(&mdpr->duration);
size = read_uint8(); /* stream_name_len */
if (size > 0) {
mdpr->name = (char *)safemalloc(size + 1);
io->read(fh, mdpr->name, size);
}
size = read_uint8(); /* mime_type_len */
if (size > 0) {
mdpr->mime_type = (char *)safemalloc(size + 1);
io->read(fh, mdpr->mime_type, size);
}
size = read_uint32_be(); /* type_specific_size */
mdpr->type_specific_size = size;
if (size > 0) {
mdpr->type_specific_data = (unsigned char *)safemalloc(size);
io->read(fh, mdpr->type_specific_data, size);
}
rvp = (real_video_props_t *)mdpr->type_specific_data;
ra4p = (real_audio_v4_props_t *)mdpr->type_specific_data;
if ((size >= sizeof(real_video_props_t)) &&
(get_fourcc(&rvp->fourcc1) == rmffFOURCC('V', 'I', 'D', 'O')))
track.type = RMFF_TRACK_TYPE_VIDEO;
else if ((size >= sizeof(real_audio_v4_props_t)) &&
(get_fourcc(&ra4p->fourcc1) ==
rmffFOURCC('.', 'r', 'a', 0xfd))) {
track.type = RMFF_TRACK_TYPE_AUDIO;
if ((get_uint16_be(&ra4p->version1) == 5) &&
(size < sizeof(real_audio_v5_props_t)))
return set_error(RMFF_ERR_DATA, "RealAudio v5 data indicated but "
"data too small", RMFF_ERR_DATA);
}
file->tracks =
(rmff_track_t *)saferealloc(file->tracks, (file->num_tracks + 1) *
sizeof(rmff_track_t));
file->tracks[file->num_tracks] = track;
file->num_tracks++;
} else if (object_id == rmffFOURCC('D', 'A', 'T', 'A')) {
file->num_packets_in_chunk = read_uint32_be();
file->next_data_header_offset = read_uint32_be();
file->first_data_header_offset = io->tell(fh) - (4 + 4 + 2);
break;
} else {
/* Unknown header type */
return set_error(RMFF_ERR_DATA, NULL, RMFF_ERR_DATA);
}
}
if (file->prop_header_found && (file->first_data_header_offset > 0)) {
file->headers_read = 1;
return 0;
}
return set_error(RMFF_ERR_DATA, NULL, RMFF_ERR_DATA);
}
int
rmff_get_next_frame_size(rmff_file_t *file) {
uint16_t object_version, length;
uint32_t object_id;
mb_file_io_t *io;
void *fh;
int result;
int64_t old_pos;
if ((file == NULL) || (!file->headers_read) || (file->io == NULL) ||
(file->handle == NULL))
return set_error(RMFF_ERR_PARAMETERS, NULL, RMFF_ERR_PARAMETERS);
io = file->io;
fh = file->handle;
old_pos = io->tell(fh);
if ((file->size - old_pos) < 12)
return set_error(RMFF_ERR_EOF, NULL, RMFF_ERR_EOF);
object_version = read_uint16_be();
length = read_uint16_be();
object_id = ((uint32_t)object_version) << 16 | length;
if (object_id == rmffFOURCC('D', 'A', 'T', 'A')) {
skip(4 + 4); /* packets_in_chunk, next_data_header */
result = rmff_get_next_frame_size(file);
io->seek(fh, old_pos, SEEK_SET);
return result;
}
io->seek(fh, old_pos, SEEK_SET);
if (object_id == rmffFOURCC('I', 'N', 'D', 'X'))
return set_error(RMFF_ERR_EOF, NULL, RMFF_ERR_EOF);
return length - 12;
}
rmff_frame_t *
rmff_read_next_frame(rmff_file_t *file,
void *buffer) {
rmff_frame_t *frame;
uint16_t object_version, length;
uint32_t object_id;
mb_file_io_t *io;
void *fh;
if ((file == NULL) || (!file->headers_read) || (file->io == NULL) ||
(file->handle == NULL))
return (rmff_frame_t *)set_error(RMFF_ERR_PARAMETERS, NULL, 0);
io = file->io;
fh = file->handle;
if ((file->size - io->tell(fh)) < 12)
return (rmff_frame_t *)set_error(RMFF_ERR_EOF, NULL, 0);
object_version = read_uint16_be();
length = read_uint16_be();
object_id = ((uint32_t)object_version) << 16 | length;
if (object_id == rmffFOURCC('D', 'A', 'T', 'A')) {
file->num_packets_in_chunk = read_uint32_be();
file->next_data_header_offset = read_uint32_be();
file->num_packets_read = 0;
return rmff_read_next_frame(file, buffer);
}
if ((file->num_packets_read >= file->num_packets_in_chunk) ||
(object_id == rmffFOURCC('I', 'N', 'D', 'X')))
return (rmff_frame_t *)set_error(RMFF_ERR_EOF, NULL, 0);
frame = (rmff_frame_t *)safecalloc(sizeof(rmff_frame_t));
if (buffer == NULL) {
buffer = safemalloc(length);
frame->allocated_by_rmff = 1;
}
frame->data = buffer;
frame->size = length - 12;
frame->id = read_uint16_be();
frame->timecode = read_uint32_be();
frame->reserved = read_uint8();
frame->flags = read_uint8();
if (io->read(fh, frame->data, frame->size) != frame->size) {
rmff_release_frame(frame);
return (rmff_frame_t *)set_error(RMFF_ERR_EOF, NULL, 0);
}
file->num_packets_read++;
return frame;
}
void
rmff_release_frame(rmff_frame_t *frame) {
if (frame == NULL)
return;
if (frame->allocated_by_rmff)
safefree(frame->data);
safefree(frame);
}

32
librmff/testrmff/Makefile Normal file
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@ -0,0 +1,32 @@
# User settings
CC = gcc
AR = ar
RANLIB = ranlib
INSTALL = install
CFLAGS = -Wall -Wshadow -g
INCLUDES = -I..
LDFLAGS = -L..
# Used for 'make install'. Change/overwrite as needed.
prefix = /usr/local
libdir = $(prefix)/lib
includedir = $(prefix)/include
# Don't change these settings
SOURCES = testrmff.c
OBJECTS := $(patsubst %.c,%.o,$(SOURCES))
CFLAGS += -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
all:
make -C .. all
make testrmff
clean:
rm -f $(OBJECTS) testrmff
%.o: %.c ../librmff.h
$(CC) -c -o $@ $(CFLAGS) $(INCLUDES) $<
testrmff: $(OBJECTS) ../librmff.a
$(CC) -o $@ $(LDFLAGS) $(OBJECTS) -lrmff

53
librmff/testrmff/testrmff.c Normal file
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@ -0,0 +1,53 @@
#include <stdio.h>
#include <string.h>
#include "librmff.h"
char buffer[128000];
void
test_reading(const char *file_name) {
rmff_file_t *file;
rmff_frame_t *frame;
int frame_no;
file = rmff_open_file(file_name, MB_OPEN_MODE_READING);
if (file == NULL) {
printf("Could not open %s\n", file_name);
return;
}
printf("Opened %s, reading headers... ", file_name);
if (rmff_read_headers(file) != RMFF_ERR_OK) {
printf("failed. Error code: %d, error message: %s\n",
rmff_last_error, rmff_last_error_msg);
return;
}
printf("done.\nNumber of tracks: %u, number of packets: %u\nNow reading "
"all frames.\n", file->num_tracks, file->num_packets_in_chunk);
frame_no = 0;
do {
printf("frame %d expected size: %d", frame_no,
rmff_get_next_frame_size(file));
if ((frame = rmff_read_next_frame(file, buffer)) != NULL) {
printf(", read ok with size %d", frame->size);
rmff_release_frame(frame);
}
printf("\n");
frame_no++;
} while (frame != NULL);
rmff_close_file(file);
}
int
main(int argc,
char *argv[]) {
int i;
if (argc < 2)
test_reading("readtestvideo.rm");
else
for (i = 1; i < argc; i++)
test_reading(argv[i]);
return 0;
}