| /* |
| ** Copyright (C) 2001-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** |
| ** This program 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 of the License, or |
| ** (at your option) any later version. |
| ** |
| ** This program 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 Lesser General Public License for more details. |
| ** |
| ** You should have received a copy of the GNU Lesser General Public License |
| ** along with this program; if not, write to the Free Software |
| ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| #include "sfconfig.h" |
| |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <ctype.h> |
| |
| #include "sndfile.h" |
| #include "sfendian.h" |
| #include "common.h" |
| |
| /*------------------------------------------------------------------------------ |
| ** Macros to handle big/little endian issues. |
| */ |
| |
| /* The IRCAM magic number is weird in that one byte in the number can have |
| ** values of 0x1, 0x2, 0x03 or 0x04. Hence the need for a marker and a mask. |
| */ |
| |
| #define IRCAM_BE_MASK (MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF)) |
| #define IRCAM_BE_MARKER (MAKE_MARKER (0x64, 0xA3, 0x00, 0x00)) |
| |
| #define IRCAM_LE_MASK (MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF)) |
| #define IRCAM_LE_MARKER (MAKE_MARKER (0x00, 0x00, 0xA3, 0x64)) |
| |
| #define IRCAM_02B_MARKER (MAKE_MARKER (0x64, 0xA3, 0x02, 0x00)) |
| #define IRCAM_03L_MARKER (MAKE_MARKER (0x64, 0xA3, 0x03, 0x00)) |
| |
| #define IRCAM_DATA_OFFSET (1024) |
| |
| /*------------------------------------------------------------------------------ |
| ** Typedefs. |
| */ |
| |
| enum |
| { IRCAM_PCM_16 = 0x00002, |
| IRCAM_FLOAT = 0x00004, |
| IRCAM_ALAW = 0x10001, |
| IRCAM_ULAW = 0x20001, |
| IRCAM_PCM_32 = 0x40004 |
| } ; |
| |
| |
| /*------------------------------------------------------------------------------ |
| ** Private static functions. |
| */ |
| |
| static int ircam_close (SF_PRIVATE *psf) ; |
| static int ircam_write_header (SF_PRIVATE *psf, int calc_length) ; |
| static int ircam_read_header (SF_PRIVATE *psf) ; |
| |
| static int get_encoding (int subformat) ; |
| |
| static const char* get_encoding_str (int encoding) ; |
| |
| /*------------------------------------------------------------------------------ |
| ** Public function. |
| */ |
| |
| int |
| ircam_open (SF_PRIVATE *psf) |
| { int subformat ; |
| int error = SFE_NO_ERROR ; |
| |
| if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| { if ((error = ircam_read_header (psf))) |
| return error ; |
| } ; |
| |
| subformat = SF_CODEC (psf->sf.format) ; |
| |
| if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_IRCAM) |
| return SFE_BAD_OPEN_FORMAT ; |
| |
| psf->endian = SF_ENDIAN (psf->sf.format) ; |
| if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU) |
| psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ; |
| |
| psf->dataoffset = IRCAM_DATA_OFFSET ; |
| |
| if ((error = ircam_write_header (psf, SF_FALSE))) |
| return error ; |
| |
| psf->write_header = ircam_write_header ; |
| } ; |
| |
| psf->container_close = ircam_close ; |
| |
| switch (subformat) |
| { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */ |
| error = ulaw_init (psf) ; |
| break ; |
| |
| case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */ |
| error = alaw_init (psf) ; |
| break ; |
| |
| case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */ |
| case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */ |
| error = pcm_init (psf) ; |
| break ; |
| |
| case SF_FORMAT_FLOAT : /* 32-bit linear PCM. */ |
| error = float32_init (psf) ; |
| break ; |
| |
| default : break ; |
| } ; |
| |
| return error ; |
| } /* ircam_open */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static int |
| ircam_read_header (SF_PRIVATE *psf) |
| { unsigned int marker, encoding ; |
| float samplerate ; |
| int error = SFE_NO_ERROR ; |
| |
| psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ; |
| |
| if (((marker & IRCAM_BE_MASK) != IRCAM_BE_MARKER) && ((marker & IRCAM_LE_MASK) != IRCAM_LE_MARKER)) |
| { psf_log_printf (psf, "marker: 0x%X\n", marker) ; |
| return SFE_IRCAM_NO_MARKER ; |
| } ; |
| |
| psf->endian = SF_ENDIAN_LITTLE ; |
| |
| if (psf->sf.channels > 256) |
| { psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ; |
| |
| /* Sanity checking for endian-ness detection. */ |
| if (psf->sf.channels > 256) |
| { psf_log_printf (psf, "marker: 0x%X\n", marker) ; |
| return SFE_IRCAM_BAD_CHANNELS ; |
| } ; |
| |
| psf->endian = SF_ENDIAN_BIG ; |
| } ; |
| |
| psf_log_printf (psf, "marker: 0x%X\n", marker) ; |
| |
| psf->sf.samplerate = (int) samplerate ; |
| |
| psf_log_printf (psf, " Sample Rate : %d\n" |
| " Channels : %d\n" |
| " Encoding : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ; |
| |
| switch (encoding) |
| { case IRCAM_PCM_16 : |
| psf->bytewidth = 2 ; |
| psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| |
| psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ; |
| break ; |
| |
| case IRCAM_PCM_32 : |
| psf->bytewidth = 4 ; |
| psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| |
| psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ; |
| break ; |
| |
| case IRCAM_FLOAT : |
| psf->bytewidth = 4 ; |
| psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| |
| psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ; |
| break ; |
| |
| case IRCAM_ALAW : |
| psf->bytewidth = 1 ; |
| psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| |
| psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ; |
| break ; |
| |
| case IRCAM_ULAW : |
| psf->bytewidth = 1 ; |
| psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| |
| psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ; |
| break ; |
| |
| default : |
| error = SFE_IRCAM_UNKNOWN_FORMAT ; |
| break ; |
| } ; |
| |
| if (psf->endian == SF_ENDIAN_BIG) |
| psf->sf.format |= SF_ENDIAN_BIG ; |
| else |
| psf->sf.format |= SF_ENDIAN_LITTLE ; |
| |
| if (error) |
| return error ; |
| |
| psf->dataoffset = IRCAM_DATA_OFFSET ; |
| psf->datalength = psf->filelength - psf->dataoffset ; |
| |
| if (psf->sf.frames == 0 && psf->blockwidth) |
| psf->sf.frames = psf->datalength / psf->blockwidth ; |
| |
| psf_log_printf (psf, " Samples : %d\n", psf->sf.frames) ; |
| |
| psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ; |
| |
| return 0 ; |
| } /* ircam_read_header */ |
| |
| static int |
| ircam_close (SF_PRIVATE *psf) |
| { |
| psf_log_printf (psf, "close\n") ; |
| |
| return 0 ; |
| } /* ircam_close */ |
| |
| static int |
| ircam_write_header (SF_PRIVATE *psf, int UNUSED (calc_length)) |
| { int encoding ; |
| float samplerate ; |
| sf_count_t current ; |
| |
| if (psf->pipeoffset > 0) |
| return 0 ; |
| |
| current = psf_ftell (psf) ; |
| |
| /* This also sets psf->endian. */ |
| encoding = get_encoding (SF_CODEC (psf->sf.format)) ; |
| |
| if (encoding == 0) |
| return SFE_BAD_OPEN_FORMAT ; |
| |
| /* Reset the current header length to zero. */ |
| psf->header [0] = 0 ; |
| psf->headindex = 0 ; |
| |
| if (psf->is_pipe == SF_FALSE) |
| psf_fseek (psf, 0, SEEK_SET) ; |
| |
| samplerate = psf->sf.samplerate ; |
| |
| switch (psf->endian) |
| { case SF_ENDIAN_BIG : |
| psf_binheader_writef (psf, "Emf", IRCAM_02B_MARKER, samplerate) ; |
| psf_binheader_writef (psf, "E44", psf->sf.channels, encoding) ; |
| break ; |
| |
| case SF_ENDIAN_LITTLE : |
| psf_binheader_writef (psf, "emf", IRCAM_03L_MARKER, samplerate) ; |
| psf_binheader_writef (psf, "e44", psf->sf.channels, encoding) ; |
| break ; |
| |
| default : return SFE_BAD_OPEN_FORMAT ; |
| } ; |
| |
| psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ; |
| |
| /* Header construction complete so write it out. */ |
| psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| |
| if (psf->error) |
| return psf->error ; |
| |
| if (current > 0) |
| psf_fseek (psf, current, SEEK_SET) ; |
| |
| return psf->error ; |
| } /* ircam_write_header */ |
| |
| static int |
| get_encoding (int subformat) |
| { switch (subformat) |
| { case SF_FORMAT_PCM_16 : return IRCAM_PCM_16 ; |
| case SF_FORMAT_PCM_32 : return IRCAM_PCM_32 ; |
| |
| case SF_FORMAT_FLOAT : return IRCAM_FLOAT ; |
| |
| case SF_FORMAT_ULAW : return IRCAM_ULAW ; |
| case SF_FORMAT_ALAW : return IRCAM_ALAW ; |
| |
| default : break ; |
| } ; |
| |
| return 0 ; |
| } /* get_encoding */ |
| |
| static const char* |
| get_encoding_str (int encoding) |
| { switch (encoding) |
| { case IRCAM_PCM_16 : return "16 bit PCM" ; |
| case IRCAM_FLOAT : return "32 bit float" ; |
| case IRCAM_ALAW : return "A law" ; |
| case IRCAM_ULAW : return "u law" ; |
| case IRCAM_PCM_32 : return "32 bit PCM" ; |
| } ; |
| return "Unknown encoding" ; |
| } /* get_encoding_str */ |
| |