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643 lines
21 KiB
643 lines
21 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <system/audio.h>
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#include <audio_utils/sndfile.h>
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#include <audio_utils/primitives.h>
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#ifdef HAVE_STDERR
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#include <stdio.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#define WAVE_FORMAT_PCM 1
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#define WAVE_FORMAT_IEEE_FLOAT 3
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#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
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struct SNDFILE_ {
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int mode;
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uint8_t *temp; // realloc buffer used for shrinking 16 bits to 8 bits and byte-swapping
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FILE *stream;
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size_t bytesPerFrame;
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size_t remaining; // frames unread for SFM_READ, frames written for SFM_WRITE
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SF_INFO info;
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};
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static unsigned little2u(unsigned char *ptr)
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{
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return (ptr[1] << 8) + ptr[0];
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}
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static unsigned little4u(unsigned char *ptr)
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{
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return (ptr[3] << 24) + (ptr[2] << 16) + (ptr[1] << 8) + ptr[0];
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}
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static int isLittleEndian(void)
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{
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static const short one = 1;
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return *((const char *) &one) == 1;
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}
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// "swab" conflicts with OS X <string.h>
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static void my_swab(short *ptr, size_t numToSwap)
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{
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while (numToSwap > 0) {
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*ptr = little2u((unsigned char *) ptr);
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--numToSwap;
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++ptr;
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}
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}
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static SNDFILE *sf_open_read(const char *path, SF_INFO *info)
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{
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FILE *stream = fopen(path, "rb");
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if (stream == NULL) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "fopen %s failed errno %d\n", path, errno);
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#endif
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return NULL;
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}
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SNDFILE *handle = (SNDFILE *) malloc(sizeof(SNDFILE));
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handle->mode = SFM_READ;
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handle->temp = NULL;
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handle->stream = stream;
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handle->info.format = SF_FORMAT_WAV;
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// don't attempt to parse all valid forms, just the most common ones
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unsigned char wav[12];
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size_t actual;
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actual = fread(wav, sizeof(char), sizeof(wav), stream);
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if (actual < 12) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "actual %zu < 44\n", actual);
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#endif
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goto close;
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}
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if (memcmp(wav, "RIFF", 4)) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "wav != RIFF\n");
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#endif
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goto close;
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}
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unsigned riffSize = little4u(&wav[4]);
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if (riffSize < 4) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "riffSize %u < 4\n", riffSize);
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#endif
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goto close;
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}
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if (memcmp(&wav[8], "WAVE", 4)) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "missing WAVE\n");
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#endif
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goto close;
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}
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size_t remaining = riffSize - 4;
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int hadFmt = 0;
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int hadData = 0;
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long dataTell = 0L;
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while (remaining >= 8) {
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unsigned char chunk[8];
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actual = fread(chunk, sizeof(char), sizeof(chunk), stream);
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if (actual != sizeof(chunk)) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "actual %zu != %zu\n", actual, sizeof(chunk));
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#endif
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goto close;
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}
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remaining -= 8;
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unsigned chunkSize = little4u(&chunk[4]);
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if (chunkSize > remaining) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "chunkSize %u > remaining %zu\n", chunkSize, remaining);
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#endif
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goto close;
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}
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if (!memcmp(&chunk[0], "fmt ", 4)) {
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if (hadFmt) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "multiple fmt\n");
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#endif
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goto close;
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}
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if (chunkSize < 2) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "chunkSize %u < 2\n", chunkSize);
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#endif
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goto close;
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}
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unsigned char fmt[40];
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actual = fread(fmt, sizeof(char), 2, stream);
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if (actual != 2) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "actual %zu != 2\n", actual);
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#endif
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goto close;
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}
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unsigned format = little2u(&fmt[0]);
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size_t minSize = 0;
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switch (format) {
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case WAVE_FORMAT_PCM:
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case WAVE_FORMAT_IEEE_FLOAT:
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minSize = 16;
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break;
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case WAVE_FORMAT_EXTENSIBLE:
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minSize = 40;
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break;
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default:
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#ifdef HAVE_STDERR
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fprintf(stderr, "unsupported format %u\n", format);
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#endif
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goto close;
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}
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if (chunkSize < minSize) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "chunkSize %u < minSize %zu\n", chunkSize, minSize);
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#endif
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goto close;
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}
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actual = fread(&fmt[2], sizeof(char), minSize - 2, stream);
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if (actual != minSize - 2) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "actual %zu != %zu\n", actual, minSize - 16);
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#endif
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goto close;
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}
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if (chunkSize > minSize) {
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fseek(stream, (long) (chunkSize - minSize), SEEK_CUR);
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}
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unsigned channels = little2u(&fmt[2]);
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if ((channels < 1) || (channels > FCC_LIMIT)) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "unsupported channels %u\n", channels);
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#endif
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goto close;
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}
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unsigned samplerate = little4u(&fmt[4]);
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if (samplerate == 0) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "samplerate %u == 0\n", samplerate);
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#endif
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goto close;
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}
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// ignore byte rate
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// ignore block alignment
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unsigned bitsPerSample = little2u(&fmt[14]);
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if (bitsPerSample != 8 && bitsPerSample != 16 && bitsPerSample != 24 &&
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bitsPerSample != 32) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "bitsPerSample %u != 8 or 16 or 24 or 32\n", bitsPerSample);
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#endif
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goto close;
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}
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unsigned bytesPerFrame = (bitsPerSample >> 3) * channels;
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handle->bytesPerFrame = bytesPerFrame;
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handle->info.samplerate = samplerate;
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handle->info.channels = channels;
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switch (bitsPerSample) {
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case 8:
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handle->info.format |= SF_FORMAT_PCM_U8;
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break;
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case 16:
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handle->info.format |= SF_FORMAT_PCM_16;
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break;
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case 24:
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handle->info.format |= SF_FORMAT_PCM_24;
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break;
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case 32:
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if (format == WAVE_FORMAT_IEEE_FLOAT)
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handle->info.format |= SF_FORMAT_FLOAT;
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else
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handle->info.format |= SF_FORMAT_PCM_32;
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break;
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}
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hadFmt = 1;
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} else if (!memcmp(&chunk[0], "data", 4)) {
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if (!hadFmt) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "data not preceded by fmt\n");
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#endif
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goto close;
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}
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if (hadData) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "multiple data\n");
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#endif
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goto close;
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}
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handle->remaining = chunkSize / handle->bytesPerFrame;
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handle->info.frames = handle->remaining;
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dataTell = ftell(stream);
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if (chunkSize > 0) {
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fseek(stream, (long) chunkSize, SEEK_CUR);
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}
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hadData = 1;
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} else if (!memcmp(&chunk[0], "fact", 4)) {
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// ignore fact
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if (chunkSize > 0) {
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fseek(stream, (long) chunkSize, SEEK_CUR);
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}
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} else {
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// ignore unknown chunk
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#ifdef HAVE_STDERR
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fprintf(stderr, "ignoring unknown chunk %c%c%c%c\n",
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chunk[0], chunk[1], chunk[2], chunk[3]);
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#endif
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if (chunkSize > 0) {
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fseek(stream, (long) chunkSize, SEEK_CUR);
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}
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}
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remaining -= chunkSize;
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}
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if (remaining > 0) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "partial chunk at end of RIFF, remaining %zu\n", remaining);
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#endif
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goto close;
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}
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if (!hadData) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "missing data\n");
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#endif
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goto close;
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}
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(void) fseek(stream, dataTell, SEEK_SET);
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*info = handle->info;
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return handle;
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close:
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free(handle);
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fclose(stream);
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return NULL;
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}
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static void write4u(unsigned char *ptr, unsigned u)
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{
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ptr[0] = u;
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ptr[1] = u >> 8;
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ptr[2] = u >> 16;
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ptr[3] = u >> 24;
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}
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static SNDFILE *sf_open_write(const char *path, SF_INFO *info)
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{
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int sub = info->format & SF_FORMAT_SUBMASK;
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if (!(
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(info->samplerate > 0) &&
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(info->channels > 0 && info->channels <= FCC_8) &&
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((info->format & SF_FORMAT_TYPEMASK) == SF_FORMAT_WAV) &&
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(sub == SF_FORMAT_PCM_16 || sub == SF_FORMAT_PCM_U8 || sub == SF_FORMAT_FLOAT ||
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sub == SF_FORMAT_PCM_24 || sub == SF_FORMAT_PCM_32)
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)) {
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return NULL;
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}
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FILE *stream = fopen(path, "w+b");
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if (stream == NULL) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "fopen %s failed errno %d\n", path, errno);
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#endif
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return NULL;
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}
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unsigned char wav[58];
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memset(wav, 0, sizeof(wav));
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memcpy(wav, "RIFF", 4);
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memcpy(&wav[8], "WAVEfmt ", 8);
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if (sub == SF_FORMAT_FLOAT) {
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wav[4] = 50; // riffSize
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wav[16] = 18; // fmtSize
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wav[20] = WAVE_FORMAT_IEEE_FLOAT;
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} else {
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wav[4] = 36; // riffSize
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wav[16] = 16; // fmtSize
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wav[20] = WAVE_FORMAT_PCM;
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}
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wav[22] = info->channels;
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write4u(&wav[24], info->samplerate);
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unsigned bitsPerSample;
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switch (sub) {
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case SF_FORMAT_PCM_16:
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bitsPerSample = 16;
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break;
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case SF_FORMAT_PCM_U8:
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bitsPerSample = 8;
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break;
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case SF_FORMAT_FLOAT:
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bitsPerSample = 32;
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break;
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case SF_FORMAT_PCM_24:
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bitsPerSample = 24;
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break;
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case SF_FORMAT_PCM_32:
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bitsPerSample = 32;
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break;
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default: // not reachable
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bitsPerSample = 0;
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break;
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}
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unsigned blockAlignment = (bitsPerSample >> 3) * info->channels;
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unsigned byteRate = info->samplerate * blockAlignment;
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write4u(&wav[28], byteRate);
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wav[32] = blockAlignment;
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wav[34] = bitsPerSample;
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size_t extra = 0;
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if (sub == SF_FORMAT_FLOAT) {
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memcpy(&wav[38], "fact", 4);
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wav[42] = 4;
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memcpy(&wav[50], "data", 4);
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extra = 14;
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} else
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memcpy(&wav[36], "data", 4);
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// dataSize is initially zero
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(void) fwrite(wav, 44 + extra, 1, stream);
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SNDFILE *handle = (SNDFILE *) malloc(sizeof(SNDFILE));
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handle->mode = SFM_WRITE;
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handle->temp = NULL;
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handle->stream = stream;
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handle->bytesPerFrame = blockAlignment;
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handle->remaining = 0;
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handle->info = *info;
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return handle;
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}
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SNDFILE *sf_open(const char *path, int mode, SF_INFO *info)
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{
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if (path == NULL || info == NULL) {
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#ifdef HAVE_STDERR
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fprintf(stderr, "path=%p info=%p\n", path, info);
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#endif
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return NULL;
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}
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switch (mode) {
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case SFM_READ:
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return sf_open_read(path, info);
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case SFM_WRITE:
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return sf_open_write(path, info);
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default:
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#ifdef HAVE_STDERR
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fprintf(stderr, "mode=%d\n", mode);
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#endif
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return NULL;
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}
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}
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void sf_close(SNDFILE *handle)
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{
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if (handle == NULL)
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return;
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free(handle->temp);
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if (handle->mode == SFM_WRITE) {
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(void) fflush(handle->stream);
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rewind(handle->stream);
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unsigned char wav[58];
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size_t extra = (handle->info.format & SF_FORMAT_SUBMASK) == SF_FORMAT_FLOAT ? 14 : 0;
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(void) fread(wav, 44 + extra, 1, handle->stream);
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unsigned dataSize = handle->remaining * handle->bytesPerFrame;
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write4u(&wav[4], dataSize + 36 + extra); // riffSize
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write4u(&wav[40 + extra], dataSize); // dataSize
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rewind(handle->stream);
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(void) fwrite(wav, 44 + extra, 1, handle->stream);
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}
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(void) fclose(handle->stream);
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free(handle);
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}
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sf_count_t sf_readf_short(SNDFILE *handle, short *ptr, sf_count_t desiredFrames)
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{
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if (handle == NULL || handle->mode != SFM_READ || ptr == NULL || !handle->remaining ||
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desiredFrames <= 0) {
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return 0;
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}
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if (handle->remaining < (size_t) desiredFrames) {
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desiredFrames = handle->remaining;
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}
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// does not check for numeric overflow
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size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
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size_t actualBytes;
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void *temp = NULL;
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unsigned format = handle->info.format & SF_FORMAT_SUBMASK;
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if (format == SF_FORMAT_PCM_32 || format == SF_FORMAT_FLOAT || format == SF_FORMAT_PCM_24) {
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temp = malloc(desiredBytes);
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actualBytes = fread(temp, sizeof(char), desiredBytes, handle->stream);
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} else {
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actualBytes = fread(ptr, sizeof(char), desiredBytes, handle->stream);
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}
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size_t actualFrames = actualBytes / handle->bytesPerFrame;
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handle->remaining -= actualFrames;
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switch (format) {
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case SF_FORMAT_PCM_U8:
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memcpy_to_i16_from_u8(ptr, (unsigned char *) ptr, actualFrames * handle->info.channels);
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break;
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case SF_FORMAT_PCM_16:
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if (!isLittleEndian())
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my_swab(ptr, actualFrames * handle->info.channels);
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break;
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case SF_FORMAT_PCM_32:
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memcpy_to_i16_from_i32(ptr, (const int *) temp, actualFrames * handle->info.channels);
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free(temp);
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break;
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case SF_FORMAT_FLOAT:
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memcpy_to_i16_from_float(ptr, (const float *) temp, actualFrames * handle->info.channels);
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free(temp);
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break;
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case SF_FORMAT_PCM_24:
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memcpy_to_i16_from_p24(ptr, (const uint8_t *) temp, actualFrames * handle->info.channels);
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free(temp);
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break;
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default:
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memset(ptr, 0, actualFrames * handle->info.channels * sizeof(short));
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break;
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}
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return actualFrames;
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}
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sf_count_t sf_readf_float(SNDFILE *handle, float *ptr, sf_count_t desiredFrames)
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{
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if (handle == NULL || handle->mode != SFM_READ || ptr == NULL || !handle->remaining ||
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desiredFrames <= 0) {
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return 0;
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}
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if (handle->remaining < (size_t) desiredFrames) {
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desiredFrames = handle->remaining;
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}
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// does not check for numeric overflow
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size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
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size_t actualBytes;
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void *temp = NULL;
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unsigned format = handle->info.format & SF_FORMAT_SUBMASK;
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if (format == SF_FORMAT_PCM_16 || format == SF_FORMAT_PCM_U8 || format == SF_FORMAT_PCM_24) {
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temp = malloc(desiredBytes);
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actualBytes = fread(temp, sizeof(char), desiredBytes, handle->stream);
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} else {
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actualBytes = fread(ptr, sizeof(char), desiredBytes, handle->stream);
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}
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size_t actualFrames = actualBytes / handle->bytesPerFrame;
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handle->remaining -= actualFrames;
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switch (format) {
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case SF_FORMAT_PCM_U8:
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memcpy_to_float_from_u8(ptr, (const unsigned char *) temp,
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actualFrames * handle->info.channels);
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free(temp);
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break;
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case SF_FORMAT_PCM_16:
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memcpy_to_float_from_i16(ptr, (const short *) temp, actualFrames * handle->info.channels);
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free(temp);
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break;
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case SF_FORMAT_PCM_32:
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memcpy_to_float_from_i32(ptr, (const int *) ptr, actualFrames * handle->info.channels);
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break;
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case SF_FORMAT_FLOAT:
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break;
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case SF_FORMAT_PCM_24:
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memcpy_to_float_from_p24(ptr, (const uint8_t *) temp, actualFrames * handle->info.channels);
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free(temp);
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break;
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default:
|
|
memset(ptr, 0, actualFrames * handle->info.channels * sizeof(float));
|
|
break;
|
|
}
|
|
return actualFrames;
|
|
}
|
|
|
|
sf_count_t sf_readf_int(SNDFILE *handle, int *ptr, sf_count_t desiredFrames)
|
|
{
|
|
if (handle == NULL || handle->mode != SFM_READ || ptr == NULL || !handle->remaining ||
|
|
desiredFrames <= 0) {
|
|
return 0;
|
|
}
|
|
if (handle->remaining < (size_t) desiredFrames) {
|
|
desiredFrames = handle->remaining;
|
|
}
|
|
// does not check for numeric overflow
|
|
size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
|
|
void *temp = NULL;
|
|
unsigned format = handle->info.format & SF_FORMAT_SUBMASK;
|
|
size_t actualBytes;
|
|
if (format == SF_FORMAT_PCM_16 || format == SF_FORMAT_PCM_U8 || format == SF_FORMAT_PCM_24) {
|
|
temp = malloc(desiredBytes);
|
|
actualBytes = fread(temp, sizeof(char), desiredBytes, handle->stream);
|
|
} else {
|
|
actualBytes = fread(ptr, sizeof(char), desiredBytes, handle->stream);
|
|
}
|
|
size_t actualFrames = actualBytes / handle->bytesPerFrame;
|
|
handle->remaining -= actualFrames;
|
|
switch (format) {
|
|
case SF_FORMAT_PCM_U8:
|
|
memcpy_to_i32_from_u8(ptr, (const unsigned char *) temp,
|
|
actualFrames * handle->info.channels);
|
|
free(temp);
|
|
break;
|
|
case SF_FORMAT_PCM_16:
|
|
memcpy_to_i32_from_i16(ptr, (const short *) temp, actualFrames * handle->info.channels);
|
|
free(temp);
|
|
break;
|
|
case SF_FORMAT_PCM_32:
|
|
break;
|
|
case SF_FORMAT_FLOAT:
|
|
memcpy_to_i32_from_float(ptr, (const float *) ptr, actualFrames * handle->info.channels);
|
|
break;
|
|
case SF_FORMAT_PCM_24:
|
|
memcpy_to_i32_from_p24(ptr, (const uint8_t *) temp, actualFrames * handle->info.channels);
|
|
free(temp);
|
|
break;
|
|
default:
|
|
memset(ptr, 0, actualFrames * handle->info.channels * sizeof(int));
|
|
break;
|
|
}
|
|
return actualFrames;
|
|
}
|
|
|
|
sf_count_t sf_writef_short(SNDFILE *handle, const short *ptr, sf_count_t desiredFrames)
|
|
{
|
|
if (handle == NULL || handle->mode != SFM_WRITE || ptr == NULL || desiredFrames <= 0)
|
|
return 0;
|
|
size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
|
|
size_t actualBytes = 0;
|
|
switch (handle->info.format & SF_FORMAT_SUBMASK) {
|
|
case SF_FORMAT_PCM_U8:
|
|
handle->temp = realloc(handle->temp, desiredBytes);
|
|
memcpy_to_u8_from_i16(handle->temp, ptr, desiredBytes);
|
|
actualBytes = fwrite(handle->temp, sizeof(char), desiredBytes, handle->stream);
|
|
break;
|
|
case SF_FORMAT_PCM_16:
|
|
// does not check for numeric overflow
|
|
if (isLittleEndian()) {
|
|
actualBytes = fwrite(ptr, sizeof(char), desiredBytes, handle->stream);
|
|
} else {
|
|
handle->temp = realloc(handle->temp, desiredBytes);
|
|
memcpy(handle->temp, ptr, desiredBytes);
|
|
my_swab((short *) handle->temp, desiredFrames * handle->info.channels);
|
|
actualBytes = fwrite(handle->temp, sizeof(char), desiredBytes, handle->stream);
|
|
}
|
|
break;
|
|
case SF_FORMAT_FLOAT:
|
|
handle->temp = realloc(handle->temp, desiredBytes);
|
|
memcpy_to_float_from_i16((float *) handle->temp, ptr,
|
|
desiredFrames * handle->info.channels);
|
|
actualBytes = fwrite(handle->temp, sizeof(char), desiredBytes, handle->stream);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
size_t actualFrames = actualBytes / handle->bytesPerFrame;
|
|
handle->remaining += actualFrames;
|
|
return actualFrames;
|
|
}
|
|
|
|
sf_count_t sf_writef_float(SNDFILE *handle, const float *ptr, sf_count_t desiredFrames)
|
|
{
|
|
if (handle == NULL || handle->mode != SFM_WRITE || ptr == NULL || desiredFrames <= 0)
|
|
return 0;
|
|
size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
|
|
size_t actualBytes = 0;
|
|
switch (handle->info.format & SF_FORMAT_SUBMASK) {
|
|
case SF_FORMAT_FLOAT:
|
|
actualBytes = fwrite(ptr, sizeof(char), desiredBytes, handle->stream);
|
|
break;
|
|
case SF_FORMAT_PCM_16:
|
|
handle->temp = realloc(handle->temp, desiredBytes);
|
|
memcpy_to_i16_from_float((short *) handle->temp, ptr,
|
|
desiredFrames * handle->info.channels);
|
|
actualBytes = fwrite(handle->temp, sizeof(char), desiredBytes, handle->stream);
|
|
break;
|
|
case SF_FORMAT_PCM_U8: // transcoding from float to byte not yet implemented
|
|
default:
|
|
break;
|
|
}
|
|
size_t actualFrames = actualBytes / handle->bytesPerFrame;
|
|
handle->remaining += actualFrames;
|
|
return actualFrames;
|
|
}
|
|
|
|
sf_count_t sf_writef_int(SNDFILE *handle, const int *ptr, sf_count_t desiredFrames)
|
|
{
|
|
if (handle == NULL || handle->mode != SFM_WRITE || ptr == NULL || desiredFrames <= 0)
|
|
return 0;
|
|
size_t desiredBytes = desiredFrames * handle->bytesPerFrame;
|
|
size_t actualBytes = 0;
|
|
switch (handle->info.format & SF_FORMAT_SUBMASK) {
|
|
case SF_FORMAT_PCM_32:
|
|
actualBytes = fwrite(ptr, sizeof(char), desiredBytes, handle->stream);
|
|
break;
|
|
default: // transcoding from other formats not yet implemented
|
|
break;
|
|
}
|
|
size_t actualFrames = actualBytes / handle->bytesPerFrame;
|
|
handle->remaining += actualFrames;
|
|
return actualFrames;
|
|
}
|