]> iEval git - fdkaac.git/blame_incremental - src/pcm_sint16_converter.c
fix to use libFDKAAC signaling mode 1
[fdkaac.git] / src / pcm_sint16_converter.c
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CommitLineData
1/*
2 * Copyright (C) 2013 nu774
3 * For conditions of distribution and use, see copyright notice in COPYING
4 */
5#if HAVE_CONFIG_H
6# include "config.h"
7#endif
8#include <stdlib.h>
9#include <string.h>
10#if HAVE_STDINT_H
11# include <stdint.h>
12#endif
13#include "pcm_reader.h"
14
15typedef struct pcm_sint16_converter_t {
16 pcm_reader_vtbl_t *vtbl;
17 pcm_reader_t *src;
18 pcm_sample_description_t format;
19 void *pivot;
20 unsigned capacity;
21} pcm_sint16_converter_t;
22
23static inline pcm_reader_t *get_source(pcm_reader_t *reader)
24{
25 return ((pcm_sint16_converter_t *)reader)->src;
26}
27
28static const
29pcm_sample_description_t *get_format(pcm_reader_t *reader)
30{
31 return &((pcm_sint16_converter_t *)reader)->format;
32}
33
34static int64_t get_length(pcm_reader_t *reader)
35{
36 return pcm_get_length(get_source(reader));
37}
38
39static int64_t get_position(pcm_reader_t *reader)
40{
41 return pcm_get_position(get_source(reader));
42}
43
44static int read_frames(pcm_reader_t *reader, void *buffer, unsigned nframes)
45{
46 pcm_sint16_converter_t *self = (pcm_sint16_converter_t *)reader;
47 const pcm_sample_description_t *sfmt = pcm_get_format(self->src);
48 unsigned bytes = nframes * sfmt->bytes_per_frame;
49
50 if (self->capacity < bytes) {
51 void *p = realloc(self->pivot, bytes);
52 if (!p) return -1;
53 self->pivot = p;
54 self->capacity = bytes;
55 }
56 nframes = pcm_read_frames(self->src, self->pivot, nframes);
57 if (pcm_convert_to_native_sint16(sfmt, self->pivot, nframes, buffer) < 0)
58 return -1;
59 return nframes;
60}
61
62static void teardown(pcm_reader_t **reader)
63{
64 pcm_sint16_converter_t *self = (pcm_sint16_converter_t *)*reader;
65 pcm_teardown(&self->src);
66 free(self->pivot);
67 free(self);
68 *reader = 0;
69}
70
71static pcm_reader_vtbl_t my_vtable = {
72 get_format, get_length, get_position, read_frames, teardown
73};
74
75pcm_reader_t *pcm_open_sint16_converter(pcm_reader_t *reader)
76{
77 pcm_sint16_converter_t *self = 0;
78 pcm_sample_description_t *fmt;
79
80 if ((self = calloc(1, sizeof(pcm_sint16_converter_t))) == 0)
81 return 0;
82 self->src = reader;
83 self->vtbl = &my_vtable;
84 memcpy(&self->format, pcm_get_format(reader), sizeof(self->format));
85 fmt = &self->format;
86#if WORDS_BIGENDIAN
87 fmt->sample_type = PCM_TYPE_SINT_BE;
88#else
89 fmt->sample_type = PCM_TYPE_SINT;
90#endif
91 fmt->bits_per_channel = 16;
92 fmt->bytes_per_frame = 2 * fmt->channels_per_frame;
93 return (pcm_reader_t *)self;
94}
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