1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "audio_format.h"
#include "pcm_convert.h"
#include <string.h>
#include <glib.h>
#include <libavresample/avresample.h>
#include <libavutil/channel_layout.h>
#include <libavutil/frame.h>
#include <libavutil/opt.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "pcm"
void pcm_convert_init(struct pcm_convert_state *state)
{
memset(state, 0, sizeof(*state));
pcm_dsd_init(&state->dsd);
}
void pcm_convert_deinit(struct pcm_convert_state *state)
{
pcm_dsd_deinit(&state->dsd);
avresample_free(&state->avr);
}
void
pcm_convert_reset(struct pcm_convert_state *state)
{
pcm_dsd_reset(&state->dsd);
avresample_free(&state->avr);
}
AVFrame *pcm_convert(struct pcm_convert_state *state,
const struct audio_format *src_format,
const struct audio_format *dest_format,
const AVFrame *src)
{
AVFrame *dst;
int ret;
#if 0 // FIXME
struct audio_format float_format;
if (src_format->format == SAMPLE_FORMAT_DSD) {
size_t f_size;
const float *f = pcm_dsd_to_float(&state->dsd,
src_format->channels,
false, src, src_size,
&f_size);
if (f == NULL) {
g_set_error_literal(error_r, pcm_convert_quark(), 0,
"DSD to PCM conversion failed");
return NULL;
}
float_format = *src_format;
float_format.format = SAMPLE_FORMAT_FLOAT;
src_format = &float_format;
src = f;
src_size = f_size;
}
#endif
if (!state->avr) {
char in_layout[128], out_layout[128];
state->avr = avresample_alloc_context();
if (!state->avr)
return NULL;
state->dst_channel_layout = av_get_default_channel_layout(dest_format->channels);
state->dst_samplerate = dest_format->sample_rate;
state->dst_format = sample_fmt_native_to_libav(dest_format->format);
av_opt_set_int(state->avr, "in_channel_layout", src->channel_layout, 0);
av_opt_set_int(state->avr, "out_channel_layout", state->dst_channel_layout, 0);
av_opt_set_int(state->avr, "in_sample_rate", src->sample_rate, 0);
av_opt_set_int(state->avr, "out_sample_rate", state->dst_samplerate, 0);
av_opt_set_int(state->avr, "in_sample_fmt", src->format, 0);
av_opt_set_int(state->avr, "out_sample_fmt", state->dst_format, 0);
av_get_channel_layout_string(in_layout, sizeof(in_layout), -1, src->channel_layout);
av_get_channel_layout_string(out_layout, sizeof(out_layout), -1, state->dst_channel_layout);
g_debug("Opening resampling context %s:%d:%s -> %s:%d:%s\n",
av_get_sample_fmt_name(src->format), src->sample_rate, in_layout,
av_get_sample_fmt_name(state->dst_format), state->dst_samplerate, out_layout);
ret = avresample_open(state->avr);
if (ret < 0) {
g_warning("Error initializing format conversion.\n");
avresample_free(&state->avr);
return NULL;
}
}
dst = av_frame_alloc();
if (!dst)
return NULL;
dst->format = state->dst_format;
dst->channel_layout = state->dst_channel_layout;
dst->sample_rate = state->dst_samplerate;
dst->nb_samples = avresample_get_out_samples(state->avr, src->nb_samples);
ret = av_frame_get_buffer(dst, 32);
if (ret < 0) {
g_warning("Error allocating a buffer for format conversion.\n");
av_frame_free(&dst);
return NULL;
}
ret = avresample_convert(state->avr, dst->extended_data, dst->linesize[0],
dst->nb_samples, src->extended_data, src->linesize[0],
src->nb_samples);
if (ret < 0) {
g_warning("Error during format conversion.\n");
av_frame_free(&dst);
return NULL;
}
dst->nb_samples = ret;
return dst;
}
|
