140 lines
4.7 KiB
C
Executable file
140 lines
4.7 KiB
C
Executable file
/* (C) 2008 Jean-Marc Valin, CSIRO
|
|
*/
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "cc6_celt_header.h"
|
|
#include "cc6_os_support.h"
|
|
#include "cc6_modes.h"
|
|
|
|
/*typedef struct {
|
|
char codec_id[8];
|
|
char codec_version[20];
|
|
cc6_celt_int32_t version_id;
|
|
cc6_celt_int32_t header_size;
|
|
cc6_celt_int32_t mode;
|
|
cc6_celt_int32_t sample_rate;
|
|
cc6_celt_int32_t nb_channels;
|
|
cc6_celt_int32_t bytes_per_packet;
|
|
cc6_celt_int32_t extra_headers;
|
|
} cc6_CELTHeader;*/
|
|
|
|
static cc6_celt_uint32_t
|
|
cc6__le_32 (cc6_celt_uint32_t i)
|
|
{
|
|
cc6_celt_uint32_t ret=i;
|
|
#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
|
|
ret = (i>>24);
|
|
ret += (i>>8) & 0x0000ff00;
|
|
ret += (i<<8) & 0x00ff0000;
|
|
ret += (i<<24);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
int cc6_celt_header_init(cc6_CELTHeader *header, const cc6_CELTMode *m)
|
|
{
|
|
|
|
if (cc6_check_mode(m) != cc6_CELT_OK)
|
|
return cc6_CELT_INVALID_MODE;
|
|
if (header==NULL)
|
|
return cc6_CELT_BAD_ARG;
|
|
|
|
cc6_CELT_COPY(header->codec_id, "CELT ", 8);
|
|
cc6_CELT_COPY(header->codec_version, "experimental ", 20);
|
|
|
|
cc6_celt_mode_info(m, cc6_CELT_GET_BITSTREAM_VERSION, &header->version_id);
|
|
header->header_size = 56;
|
|
header->sample_rate = m->Fs;
|
|
header->nb_channels = m->nbChannels;
|
|
header->frame_size = m->mdctSize;
|
|
header->overlap = m->overlap;
|
|
header->bytes_per_packet = -1;
|
|
header->extra_headers = 0;
|
|
return cc6_CELT_OK;
|
|
}
|
|
|
|
int cc6_celt_header_to_packet(const cc6_CELTHeader *header, unsigned char *packet, cc6_celt_uint32_t size)
|
|
{
|
|
cc6_celt_int32_t * h;
|
|
|
|
if ((size < 56) || (header==NULL) || (packet==NULL))
|
|
return cc6_CELT_BAD_ARG; /* FAIL */
|
|
|
|
cc6_CELT_MEMSET(packet, 0, sizeof(*header));
|
|
/* FIXME: Do it in an alignment-safe manner */
|
|
|
|
/* Copy ident and version */
|
|
cc6_CELT_COPY(packet, (unsigned char*)header, 28);
|
|
|
|
/* Copy the int32 fields */
|
|
h = (cc6_celt_int32_t*)(packet+28);
|
|
*h++ = cc6__le_32 (header->version_id);
|
|
*h++ = cc6__le_32 (header->header_size);
|
|
*h++ = cc6__le_32 (header->sample_rate);
|
|
*h++ = cc6__le_32 (header->nb_channels);
|
|
*h++ = cc6__le_32 (header->frame_size);
|
|
*h++ = cc6__le_32 (header->overlap);
|
|
*h++ = cc6__le_32 (header->bytes_per_packet);
|
|
*h = cc6__le_32 (header->extra_headers);
|
|
|
|
return sizeof(*header);
|
|
}
|
|
|
|
int cc6_celt_header_from_packet(const unsigned char *packet, cc6_celt_uint32_t size, cc6_CELTHeader *header)
|
|
{
|
|
cc6_celt_int32_t * h;
|
|
|
|
if ((size < 56) || (header==NULL) || (packet==NULL))
|
|
return cc6_CELT_BAD_ARG; /* FAIL */
|
|
|
|
cc6_CELT_MEMSET((unsigned char*)header, 0, sizeof(*header));
|
|
/* FIXME: Do it in an alignment-safe manner */
|
|
|
|
/* Copy ident and version */
|
|
cc6_CELT_COPY((unsigned char*)header, packet, 28);
|
|
|
|
/* Copy the int32 fields */
|
|
h = (cc6_celt_int32_t*)(packet+28);
|
|
header->version_id = cc6__le_32(*h++);
|
|
header->header_size = cc6__le_32(*h++);
|
|
header->sample_rate = cc6__le_32(*h++);
|
|
header->nb_channels = cc6__le_32(*h++);
|
|
header->frame_size = cc6__le_32(*h++);
|
|
header->overlap = cc6__le_32(*h++);
|
|
header->bytes_per_packet = cc6__le_32(*h++);
|
|
header->extra_headers = cc6__le_32(*h);
|
|
|
|
return sizeof(*header);
|
|
}
|
|
|