/*- * Copyright (c) 2008 Ariff Abdullah * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * * $FreeBSD$ */ #include #include #include #include #include "pcm.h" #include "waveutil.h" #ifndef min #define min(x, y) ((x) < (y) ? (x) : (y)) #endif int wave_header_read(struct wave_info *w) { uint32_t sz; size_t readsz; uint8_t buf[64]; if (w->fp == NULL) { warnx("%s(): no stream assigned", __func__); return (EIO); } w->format = WAVE_FORMAT_UNKNOWN; w->bit = 0; w->channels = 0; w->rate = 0; w->endian = WAVE_UNKNOWN_ENDIAN; w->header_size = 0; w->data_size = 0; w->seekable = (ftell(w->fp) == -1) ? 0 : 1; for (;;) { readsz = fread(buf, 1, 8, w->fp); if (readsz != 8) { warnx("%s(): io error [1]", __func__); return (EIO); } sz = WAVE_READ_32(w, buf + 4); w->header_size += 8; switch (WAVE_MAGIC_READ(buf)) { case WAVE_MAGIC_RIFX: w->endian = WAVE_BIG_ENDIAN; case WAVE_MAGIC_RIFF: if (w->endian == WAVE_UNKNOWN_ENDIAN) w->endian = WAVE_LITTLE_ENDIAN; readsz = fread(buf, 1, 4, w->fp); if (readsz != 4) { warnx("%s(): io error [2]", __func__); return (EIO); } if (WAVE_MAGIC_READ(buf) != WAVE_MAGIC_WAVE) { warnx("%s(): not a WAVE file", __func__); return (EFTYPE); } w->header_size += 4; break; case WAVE_MAGIC_FMT: if (!(sz == 16 || sz == 18 || sz == 40)) { warnx("%s(): illegal header size=%u", __func__, sz); return (EFTYPE); } readsz = fread(buf, 1, sz, w->fp); if (readsz != (size_t)sz) { warnx("%s(): io error [3]", __func__); return (EIO); } w->format = WAVE_READ_16(w, buf); switch (w->format) { case WAVE_FORMAT_PCM: case WAVE_FORMAT_ALAW: case WAVE_FORMAT_ULAW: case WAVE_FORMAT_EXT: break; default: warnx("%s(): unsupported format 0x%04x", __func__, w->format); return (EFTYPE); break; } w->channels = WAVE_READ_16(w, buf + 2); w->rate = WAVE_READ_32(w, buf + 4); w->bit = WAVE_READ_16(w, buf + 14); w->header_size += sz; break; case WAVE_MAGIC_DATA: w->data_size = sz; return (0); break; default: if (w->header_size == 8) { warnx("%s(): not a RIFF file", __func__); return (EFTYPE); } while (sz > 0) { readsz = fread(buf, 1, min(sz, sizeof(buf)), w->fp); if (readsz < 1) { warnx("%s(): io error [4]", __func__); return (EIO); } w->header_size += readsz; sz -= readsz; } break; } } /* NOTREACHED */ return (0); } int wave_header_write(struct wave_info *w) { long pos; ssize_t total; int ext; uint8_t buf[4]; if (w->fp == NULL) { warnx("%s(): no stream assigned", __func__); return (EIO); } if (!((w->format == WAVE_FORMAT_PCM || w->format == WAVE_FORMAT_EXT || w->format == WAVE_FORMAT_ULAW || w->format == WAVE_FORMAT_ALAW) && (w->endian == WAVE_LITTLE_ENDIAN || w->endian == WAVE_BIG_ENDIAN))) { warnx("%s(): format=0x%08x endian=%u unknown", __func__, w->format, w->endian); return (EFTYPE); } if (w->format == WAVE_FORMAT_EXT) ext = 24; else if (w->format == WAVE_FORMAT_ULAW || w->format == WAVE_FORMAT_ALAW) ext = 2; else ext = 0; if (w->seekable != 0) { if ((pos = ftell(w->fp)) == -1 || fseek(w->fp, 0L, SEEK_SET) == -1) return (EIO); pos -= WAVE_HEADER_SIZE + ext + ((ext != 0) ? 12 : 0); if (w->data_size != (uint32_t)pos) warnx("%s(): WARNING data_size=%u != pos=%u", __func__, w->data_size, (uint32_t)pos); } if (w->endian == WAVE_LITTLE_ENDIAN) WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_RIFF); else WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_RIFX); total = fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, w->data_size + WAVE_HEADER_SIZE + ext + (!(w->format == WAVE_FORMAT_PCM || w->format == WAVE_FORMAT_EXT) ? 12 : 0) - 8); total += fwrite(buf, 1, 4, w->fp); WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_WAVE); total += fwrite(buf, 1, 4, w->fp); WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_FMT); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, 16 + ext); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_16(w, buf, w->format); total += fwrite(buf, 1, 2, w->fp); WAVE_WRITE_16(w, buf, w->channels); total += fwrite(buf, 1, 2, w->fp); WAVE_WRITE_32(w, buf, w->rate); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, w->rate * WAVE_BLOCK_ALIGN(w)); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_16(w, buf, WAVE_BLOCK_ALIGN(w)); total += fwrite(buf, 1, 2, w->fp); WAVE_WRITE_16(w, buf, w->bit); total += fwrite(buf, 1, 2, w->fp); if (ext == 2) { WAVE_WRITE_16(w, buf, 0); total += fwrite(buf, 1, 2, w->fp); } else if (ext == 24) { WAVE_WRITE_16(w, buf, 22); total += fwrite(buf, 1, 2, w->fp); WAVE_WRITE_16(w, buf, w->bit); total += fwrite(buf, 1, 2, w->fp); WAVE_WRITE_32(w, buf, 0); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_16(w, buf, WAVE_FORMAT_PCM); total += fwrite(buf, 1, 2, w->fp); total += fwrite("\x00\x00\x00\x00\x10\x00\x80\x00" "\x00\xAA\x00\x38\x9B\x71", 1, 14, w->fp); } if (ext != 0) { WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_FACT); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, 4); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, w->data_size / WAVE_BLOCK_ALIGN(w)); total += fwrite(buf, 1, 4, w->fp); ext += 12; } WAVE_MAGIC_WRITE(buf, WAVE_MAGIC_DATA); total += fwrite(buf, 1, 4, w->fp); WAVE_WRITE_32(w, buf, w->data_size); total += fwrite(buf, 1, 4, w->fp); if (total != (WAVE_HEADER_SIZE + ext)) { warnx("%s(): WARNING: header write size=%zu != %u", __func__, total, WAVE_HEADER_SIZE + ext); return (EIO); } return (0); }