/* ** Copyright (C) 2001-2009 Erik de Castro Lopo ** ** 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 #include #include #include #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->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0)) { if ((error = ircam_read_header (psf))) return error ; } ; subformat = SF_CODEC (psf->sf.format) ; if (psf->mode == SFM_WRITE || psf->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 */