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Merged 1578 and 1580.

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This commit is contained in:
Moritz Bunkus 2004-03-20 10:50:34 +00:00
parent 6d7ae72724
commit 4418dddc2c
2 changed files with 387 additions and 15 deletions
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69
librmff/librmff.h
View File

@ -32,6 +32,9 @@
* at providing the programmer an easy way to read and write RealMedia
* files. It does not contain any codecs for audio/video handling.
*
* You can find a description of the RealMedia file format at
* http://www.pcisys.net/~melanson/codecs/rmff.htm
*
* \section License
*
* The library was written by Moritz Bunkus <moritz@bunkus.org>. It is
@ -52,15 +55,19 @@
rmff_frame_t *frame;
file = rmff_open_file("sample_file.rm", RMFF_OPEN_MODE_READING);
if (file == NULL) {
if (file != NULL) {
// Handle the error.
return;
}
if (rmff_read_headers(file) == RMFF_ERR_OK) {
// Output some general information about the tracks in the file.
// Now read all the frames.
while ((frame = rmff_read_next_frame(file, NULL)) != NULL) {
// Do something with the frame and release it afterwards.
rmff_release_frame(frame);
}
rmff_close_file(file);
}
rmff_close_file(file);
\endcode
*
* \section memory_handling Memory handling
@ -291,9 +298,10 @@ typedef struct rmff_track_t {
uint32_t id;
int type;
rmff_mdpr_t mdpr_header;
int is_big_endian;
struct rmff_file_t *file;
void *internal;
} rmff_track_t;
typedef struct rmff_file_t {
@ -316,6 +324,8 @@ typedef struct rmff_file_t {
rmff_track_t *tracks;
int num_tracks;
void *internal;
} rmff_file_t;
/** \brief No error has occured. */
@ -441,6 +451,53 @@ rmff_frame_t *rmff_allocate_frame(uint32_t size, void *buffer);
*/
void rmff_release_frame(rmff_frame_t *frame);
/** \brief Creates a new track for a file.
*
* The track will be added to the list of tracks in this file.
* \a librmff will allocate a track ID that is unique in this file.
*
* \param file The file the track will be added to.
* \returns A pointer to a newly allocated ::rmff_track_t structure or
* \c NULL in case of an error.
*/
rmff_track_t *rmff_add_track(rmff_file_t *file);
/** \brief Set some default values for RealAudio streams.
*
* Some of the fields in the \a props structure will be set to pre-defined
* values, especially the \c uknown fields. Should be used after
* rmff_add_track(rmff_file_t*).
*
* \param props A pointer to the structure whose values should be set.
* \see rmff_set_std_audio_v5_values(real_audio_v5_props_t*),
* rmff_set_std_video_values(real_video_props_t*)
*/
void rmff_set_std_audio_v4_values(real_audio_v4_props_t *props);
/** \brief Set some default values for RealAudio streams.
*
* Some of the fields in the \a props structure will be set to pre-defined
* values, especially the \c uknown fields. Should be used after
* rmff_add_track(rmff_file_t*).
*
* \param props A pointer to the structure whose values should be set.
* \see rmff_set_std_audio_v4_values(real_audio_v5_props_t*),
* rmff_set_std_video_values(real_video_props_t*)
*/
void rmff_set_std_audio_v5_values(real_audio_v5_props_t *props);
/** \brief Set some default values for RealVideo streams.
*
* Some of the fields in the \a props structure will be set to pre-defined
* values, especially the \c uknown fields. Should be used after
* rmff_add_track(rmff_file_t*).
*
* \param props A pointer to the structure whose values should be set.
* \see rmff_set_std_audio_v4_values(real_audio_v4_props_t*),
* rmff_set_std_audio_v5_values(real_audio_v5_props_t*)
*/
void rmff_set_std_video_values(real_video_props_t *props);
/** \brief Sets the contents of the \link ::rmff_cont_t CONT file header
* \endlink.
*
@ -488,6 +545,12 @@ void rmff_set_track_data(rmff_track_t *track, const char *name,
void rmff_set_track_specific_data(rmff_track_t *track,
const unsigned char *data, uint32_t size);
int rmff_write_headers(rmff_file_t *file);
int rmff_fix_headers(rmff_file_t *file);
void rmff_copy_track_headers(rmff_track_t *dst, rmff_track_t *src);
/** \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 \a rmff_last_error to \c RMFF_ERR_OK.

327
librmff/rmff.c
View File

@ -27,6 +27,26 @@
#include "librmff.h"
typedef struct rmff_file_internal_t {
uint32_t max_bit_rate;
uint32_t avg_bit_rate;
uint32_t max_packet_size;
uint32_t avg_packet_size;
uint32_t highest_timecode;
uint32_t num_packets;
uint32_t data_offset;
uint32_t index_offset;
} rmff_file_internal_t;
typedef struct rmff_track_internal_t {
uint32_t max_bit_rate;
uint32_t avg_bit_rate;
uint32_t max_packet_size;
uint32_t avg_packet_size;
uint32_t highest_timecode;
uint32_t num_packets;
} rmff_track_internal_t;
int rmff_last_error = RMFF_ERR_OK;
const char *rmff_last_error_msg = NULL;
static const char *rmff_std_error_messages[] = {
@ -89,7 +109,7 @@ rmff_get_uint32_be(const void *buf) {
}
void
rmff_put_uin16_be(void *buf,
rmff_put_uint16_be(void *buf,
uint16_t value) {
unsigned char *tmp;
@ -100,7 +120,7 @@ rmff_put_uin16_be(void *buf,
}
void
rmff_put_uin32_be(void *buf,
rmff_put_uint32_be(void *buf,
uint32_t value) {
unsigned char *tmp;
@ -115,8 +135,13 @@ rmff_put_uin32_be(void *buf,
#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) rmff_put_uin16_be(addr, read_uint16_be())
#define read_uint32_be_to(addr) rmff_put_uin32_be(addr, read_uint32_be())
#define read_uint16_be_to(addr) rmff_put_uint16_be(addr, read_uint16_be())
#define read_uint32_be_to(addr) rmff_put_uint32_be(addr, read_uint32_be())
#define write_uint8(v) file_write_uint8(io, fh, v)
#define write_uint16_be(v) file_write_uint16_be(io, fh, v)
#define write_uint32_be(v) file_write_uint32_be(io, fh, v)
#define write_uint16_be_from(addr) write_uint16_be(rmff_get_uint16_be(addr))
#define write_uint32_be_from(addr) write_uint32_be(rmff_get_uint32_be(addr))
#define get_fourcc(b) rmff_get_uint32_be(b)
static uint8_t
@ -146,6 +171,33 @@ file_read_uint32_be(mb_file_io_t *io,
return rmff_get_uint32_be(tmp);
}
static int
file_write_uint8(mb_file_io_t *io,
void *fh,
uint8_t value) {
return io->write(fh, &value, 1);
}
static int
file_write_uint16_be(mb_file_io_t *io,
void *fh,
uint16_t value) {
unsigned char tmp[2];
rmff_put_uint16_be(tmp, value);
return io->write(fh, &tmp, 2);
}
static int
file_write_uint32_be(mb_file_io_t *io,
void *fh,
uint32_t value) {
unsigned char tmp[4];
rmff_put_uint32_be(tmp, value);
return io->write(fh, &tmp, 4);
}
void
die(const char *fmt,
...) {
@ -268,6 +320,7 @@ open_file_for_reading(const char *path,
file->size = io->tell(file_h);
io->seek(file_h, 4, SEEK_SET);
file->open_mode = RMFF_OPEN_MODE_READING;
file->internal = safecalloc(sizeof(rmff_file_internal_t));
return file;
}
@ -294,6 +347,7 @@ open_file_for_writing(const char *path,
file->io = io;
file->size = -1;
file->open_mode = RMFF_OPEN_MODE_WRITING;
file->internal = safecalloc(sizeof(rmff_file_internal_t));
return file;
}
@ -325,6 +379,7 @@ rmff_free_track_data(rmff_track_t *track) {
safefree(track->mdpr_header.name);
safefree(track->mdpr_header.mime_type);
safefree(track->mdpr_header.type_specific_data);
safefree(track->internal);
}
void
@ -342,6 +397,7 @@ rmff_close_file(rmff_file_t *file) {
safefree(file->cont_header.author);
safefree(file->cont_header.copyright);
safefree(file->cont_header.comment);
safefree(file->internal);
file->io->close(file->handle);
safefree(file);
}
@ -415,22 +471,22 @@ rmff_read_headers(rmff_file_t *file) {
size = read_uint16_be(); /* title_len */
if (size > 0) {
cont->title = (char *)safemalloc(size + 1);
cont->title = (char *)safecalloc(size + 1);
io->read(fh, cont->title, size);
}
size = read_uint16_be(); /* author_len */
if (size > 0) {
cont->author = (char *)safemalloc(size + 1);
cont->author = (char *)safecalloc(size + 1);
io->read(fh, cont->author, size);
}
size = read_uint16_be(); /* copyright_len */
if (size > 0) {
cont->copyright = (char *)safemalloc(size + 1);
cont->copyright = (char *)safecalloc(size + 1);
io->read(fh, cont->copyright, size);
}
size = read_uint16_be(); /* comment_len */
if (size > 0) {
cont->comment = (char *)safemalloc(size + 1);
cont->comment = (char *)safecalloc(size + 1);
io->read(fh, cont->comment, size);
}
file->cont_header_present = 1;
@ -459,7 +515,7 @@ rmff_read_headers(rmff_file_t *file) {
io->read(fh, mdpr->mime_type, size);
}
size = read_uint32_be(); /* type_specific_size */
mdpr->type_specific_size = size;
rmff_put_uint32_be(&mdpr->type_specific_size, size);
if (size > 0) {
mdpr->type_specific_data = (unsigned char *)safemalloc(size);
io->read(fh, mdpr->type_specific_data, size);
@ -480,6 +536,7 @@ rmff_read_headers(rmff_file_t *file) {
"data too small", RMFF_ERR_DATA);
}
track.internal = safecalloc(sizeof(rmff_track_internal_t));
file->tracks =
(rmff_track_t *)saferealloc(file->tracks, (file->num_tracks + 1) *
sizeof(rmff_track_t));
@ -660,5 +717,257 @@ rmff_set_track_specific_data(rmff_track_t *track,
safefree(track->mdpr_header.type_specific_data);
track->mdpr_header.type_specific_data =
(unsigned char *)safememdup(data, size);
rmff_put_uint32_be(&track->mdpr_header.type_specific_size, size);
}
}
rmff_track_t *
rmff_add_track(rmff_file_t *file) {
rmff_track_t track;
int i, id, found;
if ((file == NULL) || (file->open_mode != RMFF_OPEN_MODE_WRITING))
return (rmff_track_t *)set_error(RMFF_ERR_PARAMETERS, NULL, 0);
id = 0;
do {
found = 0;
for (i = 0; i < file->num_tracks; i++)
if (file->tracks[i].id == id) {
found = 1;
id++;
break;
}
} while (found);
memset(&track, 0, sizeof(rmff_track_t));
track.id = id;
track.file = file;
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++;
return &file->tracks[file->num_tracks - 1];
}
void
rmff_set_std_audio_v4_values(real_audio_v4_props_t *props) {
}
void
rmff_set_std_audio_v5_values(real_audio_v5_props_t *props) {
}
void
rmff_set_std_video_values(real_video_props_t *props) {
}
static int
write_prop_header(rmff_file_t *file) {
void *fh;
mb_file_io_t *io;
int bw;
io = file->io;
fh = file->handle;
/* Write the PROP header. */
bw = write_uint32_be(rmffFOURCC('P', 'R', 'O', 'P'));
bw += write_uint32_be(0x32); /* object_size */
bw += write_uint16_be(0); /* object_version */
bw += write_uint32_be_from(&file->prop_header.max_bit_rate);
bw += write_uint32_be_from(&file->prop_header.avg_bit_rate);
bw += write_uint32_be_from(&file->prop_header.max_packet_size);
bw += write_uint32_be_from(&file->prop_header.avg_packet_size);
bw += write_uint32_be_from(&file->prop_header.num_packets);
bw += write_uint32_be_from(&file->prop_header.duration);
bw += write_uint32_be_from(&file->prop_header.preroll);
bw += write_uint32_be_from(&file->prop_header.index_offset);
bw += write_uint32_be_from(&file->prop_header.data_offset);
bw += write_uint16_be_from(&file->prop_header.num_streams);
bw += write_uint16_be_from(&file->prop_header.flags);
return bw;
}
static int
write_cont_header(rmff_file_t *file) {
void *fh;
mb_file_io_t *io;
int bw, wanted_len, title_len, author_len, copyright_len, comment_len;
io = file->io;
fh = file->handle;
if (file->cont_header.title == NULL)
title_len = 0;
else
title_len = strlen(file->cont_header.title);
if (file->cont_header.author == NULL)
author_len = 0;
else
author_len = strlen(file->cont_header.author);
if (file->cont_header.copyright == NULL)
copyright_len = 0;
else
copyright_len = strlen(file->cont_header.copyright);
if (file->cont_header.comment == NULL)
comment_len = 0;
else
comment_len = strlen(file->cont_header.comment);
wanted_len = 4 + 4 + 2 + 4 * 2 + title_len + author_len + copyright_len +
comment_len;
/* Write the CONT header. */
bw = write_uint32_be(rmffFOURCC('C', 'O', 'N', 'T'));
bw += write_uint32_be(wanted_len); /* object_size */
bw += write_uint16_be(0); /* object_version */
bw += write_uint16_be(title_len);
if (file->cont_header.title != NULL)
bw += io->write(fh, file->cont_header.title, title_len);
bw += write_uint16_be(author_len);
if (file->cont_header.author != NULL)
bw += io->write(fh, file->cont_header.author, author_len);
bw += write_uint16_be(copyright_len);
if (file->cont_header.copyright != NULL)
bw += io->write(fh, file->cont_header.copyright, copyright_len);
bw += write_uint16_be(comment_len);
if (file->cont_header.comment != NULL)
bw += io->write(fh, file->cont_header.comment, comment_len);
if (bw == wanted_len)
return 0;
return set_error(RMFF_ERR_IO, "Could not write the CONT header",
RMFF_ERR_IO);
}
static int
write_mdpr_header(rmff_track_t *track) {
void *fh;
mb_file_io_t *io;
int bw, wanted_len, name_len, mime_type_len;
io = track->file->io;
fh = track->file->handle;
rmff_put_uint16_be(&track->mdpr_header.id, track->id);
if (track->mdpr_header.name == NULL)
name_len = 0;
else
name_len = strlen(track->mdpr_header.name);
if (track->mdpr_header.mime_type == NULL)
mime_type_len = 0;
else
mime_type_len = strlen(track->mdpr_header.mime_type);
wanted_len = 4 + 4 + 2 + 2 + 7 * 4 + 1 + name_len + 1 + mime_type_len +
4 + rmff_get_uint32_be(&track->mdpr_header.type_specific_size);
/* Write the MDPR header. */
bw = write_uint32_be(rmffFOURCC('M', 'D', 'P', 'R'));
bw += write_uint32_be(wanted_len); /* object_size */
bw += write_uint16_be(0); /* object_version */
bw += write_uint16_be_from(&track->mdpr_header.id);
bw += write_uint32_be_from(&track->mdpr_header.max_bit_rate);
bw += write_uint32_be_from(&track->mdpr_header.avg_bit_rate);
bw += write_uint32_be_from(&track->mdpr_header.max_packet_size);
bw += write_uint32_be_from(&track->mdpr_header.avg_packet_size);
bw += write_uint32_be_from(&track->mdpr_header.start_time);
bw += write_uint32_be_from(&track->mdpr_header.preroll);
bw += write_uint32_be_from(&track->mdpr_header.duration);
bw += write_uint8(name_len);
if (track->mdpr_header.name != NULL)
bw += io->write(fh, track->mdpr_header.name, name_len);
bw += write_uint8(mime_type_len);
if (track->mdpr_header.mime_type != NULL)
bw += io->write(fh, track->mdpr_header.mime_type, mime_type_len);
bw += write_uint32_be_from(&track->mdpr_header.type_specific_size);
if (track->mdpr_header.type_specific_data != NULL)
bw +=
io->write(fh, track->mdpr_header.type_specific_data,
rmff_get_uint32_be(&track->mdpr_header.type_specific_size));
if (wanted_len != bw)
return set_error(RMFF_ERR_IO, "Could not write the MDPR header",
RMFF_ERR_IO);
return RMFF_ERR_OK;
}
int
rmff_write_headers(rmff_file_t *file) {
void *fh;
mb_file_io_t *io;
int i, bw;
rmff_file_internal_t *fint;
const char *signature = ".RMF";
if ((file == NULL) || (file->open_mode != RMFF_OPEN_MODE_WRITING))
return set_error(RMFF_ERR_PARAMETERS, NULL, RMFF_ERR_PARAMETERS);
io = file->io;
fh = file->handle;
io->seek(fh, 0, SEEK_SET);
/* Write the file header. */
bw = io->write(fh, signature, 4);
bw += write_uint32_be(0x12); /* header_size */
bw += write_uint16_be(1); /* object_version */
bw += write_uint32_be(0); /* file_version */
bw += write_uint32_be(0); /* temporary: num_headers */
if (bw != 18)
return set_error(RMFF_ERR_IO, "Could not write the file header",
RMFF_ERR_IO);
rmff_put_uint16_be(&file->prop_header.num_streams, file->num_tracks);
bw = write_prop_header(file);
if (bw != 0x32)
return set_error(RMFF_ERR_IO, "Could not write the PROP header",
RMFF_ERR_IO);
if (file->cont_header_present) {
bw = write_cont_header(file);
if (bw != RMFF_ERR_OK)
return bw;
}
for (i = 0; i < file->num_tracks; i++) {
bw = write_mdpr_header(&file->tracks[i]);
if (bw < RMFF_ERR_OK)
return bw;
}
fint = (rmff_file_internal_t *)file->internal;
fint->data_offset = io->tell(fh);
return RMFF_ERR_OK;
}
int
rmff_fix_headers(rmff_file_t *file) {
return -1;
}
void
rmff_copy_track_headers(rmff_track_t *dst,
rmff_track_t *src) {
if ((dst == NULL) || (src == NULL))
return;
rmff_free_track_data(dst);
memcpy(&dst->mdpr_header, &src->mdpr_header, sizeof(rmff_mdpr_t));
dst->mdpr_header.name = safestrdup(src->mdpr_header.name);
dst->mdpr_header.mime_type = safestrdup(src->mdpr_header.mime_type);
dst->mdpr_header.type_specific_data = (unsigned char *)
safememdup(src->mdpr_header.type_specific_data,
rmff_get_uint32_be(&src->mdpr_header.type_specific_size));
dst->internal = (unsigned char *)safememdup(src->internal,
sizeof(rmff_track_internal_t));
dst->type = src->type;
}