198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* Copyright (C) 2002 Jean-Marc Valin
298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   File: speex_header.c
398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   Describes the Speex header
498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   Redistribution and use in source and binary forms, with or without
698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   modification, are permitted provided that the following conditions
798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   are met:
898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   - Redistributions of source code must retain the above copyright
1098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   notice, this list of conditions and the following disclaimer.
1198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
1298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   - Redistributions in binary form must reproduce the above copyright
1398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   notice, this list of conditions and the following disclaimer in the
1498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   documentation and/or other materials provided with the distribution.
1598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
1698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   - Neither the name of the Xiph.org Foundation nor the names of its
1798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   contributors may be used to endorse or promote products derived from
1898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   this software without specific prior written permission.
1998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
2098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
2198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
2298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
2398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
2498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
2598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
2698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
2798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
2898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
2998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
3098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
3198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
3298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/
3398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
3498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef HAVE_CONFIG_H
3598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "config.h"
3698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif
3798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
3898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "arch.h"
3998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex_header.h>
4098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex.h>
4198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "os_support.h"
4298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
4398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef NULL
4498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define NULL 0
4598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif
4698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
4798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/** Convert little endian */
4898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic inline spx_int32_t le_int(spx_int32_t i)
4998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{
5098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
5198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   spx_uint32_t ui, ret;
5298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ui = i;
5398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ret =  ui>>24;
5498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ret |= (ui>>8)&0x0000ff00;
5598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ret |= (ui<<8)&0x00ff0000;
5698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ret |= (ui<<24);
5798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   return ret;
5898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else
5998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   return i;
6098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif
6198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project}
6298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
6398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define ENDIAN_SWITCH(x) {x=le_int(x);}
6498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
6598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
6698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/*
6798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projecttypedef struct SpeexHeader {
6898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   char speex_string[8];
6998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   char speex_version[SPEEX_HEADER_VERSION_LENGTH];
7098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int speex_version_id;
7198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int header_size;
7298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int rate;
7398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int mode;
7498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int mode_bitstream_version;
7598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int nb_channels;
7698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int bitrate;
7798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int frame_size;
7898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int vbr;
7998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int frames_per_packet;
8098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int extra_headers;
8198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int reserved1;
8298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int reserved2;
8398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} SpeexHeader;
8498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/
8598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
8698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_init_header(SpeexHeader *header, int rate, int nb_channels, const SpeexMode *m)
8798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{
8898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int i;
8998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   const char *h="Speex   ";
9098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   /*
9198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   strncpy(header->speex_string, "Speex   ", 8);
9298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   strncpy(header->speex_version, SPEEX_VERSION, SPEEX_HEADER_VERSION_LENGTH-1);
9398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->speex_version[SPEEX_HEADER_VERSION_LENGTH-1]=0;
9498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   */
9598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   for (i=0;i<8;i++)
9698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      header->speex_string[i]=h[i];
9798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   for (i=0;i<SPEEX_HEADER_VERSION_LENGTH-1 && SPEEX_VERSION[i];i++)
9898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      header->speex_version[i]=SPEEX_VERSION[i];
9998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   for (;i<SPEEX_HEADER_VERSION_LENGTH;i++)
10098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      header->speex_version[i]=0;
10198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
10298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->speex_version_id = 1;
10398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->header_size = sizeof(SpeexHeader);
10498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
10598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->rate = rate;
10698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->mode = m->modeID;
10798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->mode_bitstream_version = m->bitstream_version;
10898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   if (m->modeID<0)
10998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      speex_warning("This mode is meant to be used alone");
11098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->nb_channels = nb_channels;
11198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->bitrate = -1;
11298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   speex_mode_query(m, SPEEX_MODE_FRAME_SIZE, &header->frame_size);
11398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->vbr = 0;
11498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
11598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->frames_per_packet = 0;
11698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->extra_headers = 0;
11798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->reserved1 = 0;
11898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   header->reserved2 = 0;
11998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project}
12098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
12198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT char *speex_header_to_packet(SpeexHeader *header, int *size)
12298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{
12398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   SpeexHeader *le_header;
12498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
12598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
12698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   SPEEX_COPY(le_header, header, 1);
12798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
12898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   /*Make sure everything is now little-endian*/
12998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->speex_version_id);
13098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->header_size);
13198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->rate);
13298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->mode);
13398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->mode_bitstream_version);
13498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->nb_channels);
13598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->bitrate);
13698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->frame_size);
13798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->vbr);
13898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->frames_per_packet);
13998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->extra_headers);
14098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
14198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   *size = sizeof(SpeexHeader);
14298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   return (char *)le_header;
14398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project}
14498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
14598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT SpeexHeader *speex_packet_to_header(char *packet, int size)
14698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{
14798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   int i;
14898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   SpeexHeader *le_header;
14998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   const char *h = "Speex   ";
15098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   for (i=0;i<8;i++)
15198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      if (packet[i]!=h[i])
15298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      {
15398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project         speex_notify("This doesn't look like a Speex file");
15498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project         return NULL;
15598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      }
15698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
15798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   /*FIXME: Do we allow larger headers?*/
15898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   if (size < (int)sizeof(SpeexHeader))
15998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   {
16098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      speex_notify("Speex header too small");
16198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      return NULL;
16298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   }
16398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
16498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
16598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
16698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   SPEEX_COPY(le_header, (SpeexHeader*)packet, 1);
16798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
16898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   /*Make sure everything is converted correctly from little-endian*/
16998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->speex_version_id);
17098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->header_size);
17198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->rate);
17298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->mode);
17398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->mode_bitstream_version);
17498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->nb_channels);
17598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->bitrate);
17698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->frame_size);
17798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->vbr);
17898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->frames_per_packet);
17998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   ENDIAN_SWITCH(le_header->extra_headers);
18098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
18198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   if (le_header->mode >= SPEEX_NB_MODES || le_header->mode < 0)
18298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   {
18398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      speex_notify("Invalid mode specified in Speex header");
18498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      speex_free (le_header);
18598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      return NULL;
18698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   }
18798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
18898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   if (le_header->nb_channels>2)
18998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      le_header->nb_channels = 2;
19098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   if (le_header->nb_channels<1)
19198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project      le_header->nb_channels = 1;
19298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
19398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   return le_header;
19498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
19598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project}
19698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project
19798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_header_free(void *ptr)
19898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{
19998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project   speex_free(ptr);
20098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project}
201