summaryrefslogtreecommitdiffstats
path: root/wavreader.c
diff options
context:
space:
mode:
authorMatthias P. Braendli <matthias.braendli@mpb.li>2014-03-09 16:41:25 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2014-03-09 16:43:04 +0100
commit4673583e61c883e0b681bdb82d1e7afa12a27348 (patch)
treea3a47b8fa7f6b9f76693e63b532fa8362f40a215 /wavreader.c
parent97d839e2db2abe2cde1a729902cbf48344a0368e (diff)
downloadfdk-aac-dabplus-4673583e61c883e0b681bdb82d1e7afa12a27348.tar.gz
fdk-aac-dabplus-4673583e61c883e0b681bdb82d1e7afa12a27348.tar.bz2
fdk-aac-dabplus-4673583e61c883e0b681bdb82d1e7afa12a27348.zip
Move sources to src, rename all programs
Diffstat (limited to 'wavreader.c')
-rw-r--r--wavreader.c163
1 files changed, 0 insertions, 163 deletions
diff --git a/wavreader.c b/wavreader.c
deleted file mode 100644
index c62a885..0000000
--- a/wavreader.c
+++ /dev/null
@@ -1,163 +0,0 @@
-/* ------------------------------------------------------------------
- * Copyright (C) 2009 Martin Storsjo
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
- * express or implied.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- * -------------------------------------------------------------------
- */
-
-#include "wavreader.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-
-#define TAG(a, b, c, d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
-
-struct wav_reader {
- FILE *wav;
- uint32_t data_length;
-
- int format;
- int sample_rate;
- int bits_per_sample;
- int channels;
- int byte_rate;
- int block_align;
-};
-
-static uint32_t read_tag(struct wav_reader* wr) {
- uint32_t tag = 0;
- tag = (tag << 8) | fgetc(wr->wav);
- tag = (tag << 8) | fgetc(wr->wav);
- tag = (tag << 8) | fgetc(wr->wav);
- tag = (tag << 8) | fgetc(wr->wav);
- return tag;
-}
-
-static uint32_t read_int32(struct wav_reader* wr) {
- uint32_t value = 0;
- value |= fgetc(wr->wav) << 0;
- value |= fgetc(wr->wav) << 8;
- value |= fgetc(wr->wav) << 16;
- value |= fgetc(wr->wav) << 24;
- return value;
-}
-
-static uint16_t read_int16(struct wav_reader* wr) {
- uint16_t value = 0;
- value |= fgetc(wr->wav) << 0;
- value |= fgetc(wr->wav) << 8;
- return value;
-}
-
-void* wav_read_open(const char *filename) {
- struct wav_reader* wr = (struct wav_reader*) malloc(sizeof(*wr));
- long data_pos = 0;
- memset(wr, 0, sizeof(*wr));
-
- wr->wav = fopen(filename, "rb");
- if (wr->wav == NULL) {
- free(wr);
- return NULL;
- }
-
- while (1) {
- uint32_t tag, tag2, length;
- tag = read_tag(wr);
- if (feof(wr->wav))
- break;
- length = read_int32(wr);
- if (tag != TAG('R', 'I', 'F', 'F') || length < 4) {
- fseek(wr->wav, length, SEEK_CUR);
- continue;
- }
- tag2 = read_tag(wr);
- length -= 4;
- if (tag2 != TAG('W', 'A', 'V', 'E')) {
- fseek(wr->wav, length, SEEK_CUR);
- continue;
- }
- // RIFF chunk found, iterate through it
- while (length >= 8) {
- uint32_t subtag, sublength;
- subtag = read_tag(wr);
- if (feof(wr->wav))
- break;
- sublength = read_int32(wr);
- length -= 8;
- if (length < sublength)
- break;
- if (subtag == TAG('f', 'm', 't', ' ')) {
- if (sublength < 16) {
- // Insufficient data for 'fmt '
- break;
- }
- wr->format = read_int16(wr);
- wr->channels = read_int16(wr);
- wr->sample_rate = read_int32(wr);
- wr->byte_rate = read_int32(wr);
- wr->block_align = read_int16(wr);
- wr->bits_per_sample = read_int16(wr);
- fseek(wr->wav, sublength - 16, SEEK_CUR);
- } else if (subtag == TAG('d', 'a', 't', 'a')) {
- data_pos = ftell(wr->wav);
- wr->data_length = sublength;
- fseek(wr->wav, sublength, SEEK_CUR);
- } else {
- fseek(wr->wav, sublength, SEEK_CUR);
- }
- length -= sublength;
- }
- if (length > 0) {
- // Bad chunk?
- fseek(wr->wav, length, SEEK_CUR);
- }
- }
- fseek(wr->wav, data_pos, SEEK_SET);
- return wr;
-}
-
-void wav_read_close(void* obj) {
- struct wav_reader* wr = (struct wav_reader*) obj;
- fclose(wr->wav);
- free(wr);
-}
-
-int wav_get_header(void* obj, int* format, int* channels, int* sample_rate, int* bits_per_sample, unsigned int* data_length) {
- struct wav_reader* wr = (struct wav_reader*) obj;
- if (format)
- *format = wr->format;
- if (channels)
- *channels = wr->channels;
- if (sample_rate)
- *sample_rate = wr->sample_rate;
- if (bits_per_sample)
- *bits_per_sample = wr->bits_per_sample;
- if (data_length)
- *data_length = wr->data_length;
- return wr->format && wr->sample_rate;
-}
-
-int wav_read_data(void* obj, unsigned char* data, unsigned int length) {
- struct wav_reader* wr = (struct wav_reader*) obj;
- int n;
- if (wr->wav == NULL)
- return -1;
- if (length > wr->data_length)
- length = wr->data_length;
- n = fread(data, 1, length, wr->wav);
- wr->data_length -= length;
- return n;
-}
-