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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Copyright (c) 2014 Luca Barbato <lu_zero@gentoo.org>
* Copyright (c) 2014 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "swresample_internal.h"
#include "libavutil/channel_layout.h"
#include "libavutil/frame.h"
#include "libavutil/opt.h"
int swr_config_frame(SwrContext *s, const AVFrame *out, const AVFrame *in)
{
AVChannelLayout ch_layout = { 0 };
int ret;
swr_close(s);
if (in) {
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((in->channel_layout && (in->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
in->ch_layout.u.mask != in->channel_layout))) {
av_channel_layout_from_mask(&ch_layout, in->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
} else
#endif
if ((ret = av_channel_layout_copy(&ch_layout, &in->ch_layout)) < 0)
goto fail;
if ((ret = av_opt_set_chlayout(s, "ichl", &ch_layout, 0)) < 0)
goto fail;
if ((ret = av_opt_set_int(s, "isf", in->format, 0)) < 0)
goto fail;
if ((ret = av_opt_set_int(s, "isr", in->sample_rate, 0)) < 0)
goto fail;
}
if (out) {
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((out->channel_layout && (out->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
out->ch_layout.u.mask != out->channel_layout))) {
av_channel_layout_uninit(&ch_layout);
av_channel_layout_from_mask(&ch_layout, out->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
} else
#endif
if ((ret = av_channel_layout_copy(&ch_layout, &out->ch_layout)) < 0)
goto fail;
if ((ret = av_opt_set_chlayout(s, "ochl", &ch_layout, 0)) < 0)
goto fail;
if ((ret = av_opt_set_int(s, "osf", out->format, 0)) < 0)
goto fail;
if ((ret = av_opt_set_int(s, "osr", out->sample_rate, 0)) < 0)
goto fail;
}
ret = 0;
fail:
if (ret < 0)
av_log(s, AV_LOG_ERROR, "Failed to set option\n");
av_channel_layout_uninit(&ch_layout);
return ret;
}
static int config_changed(SwrContext *s,
const AVFrame *out, const AVFrame *in)
{
AVChannelLayout ch_layout = { 0 };
int ret = 0, err;
if (in) {
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((in->channel_layout && (in->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
in->ch_layout.u.mask != in->channel_layout))) {
av_channel_layout_from_mask(&ch_layout, in->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
} else
#endif
if ((err = av_channel_layout_copy(&ch_layout, &in->ch_layout)) < 0)
return err;
if (av_channel_layout_compare(&s->in_ch_layout, &ch_layout) ||
s->in_sample_rate != in->sample_rate ||
s->in_sample_fmt != in->format) {
ret |= AVERROR_INPUT_CHANGED;
}
}
if (out) {
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((out->channel_layout && (out->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
out->ch_layout.u.mask != out->channel_layout))) {
av_channel_layout_uninit(&ch_layout);
av_channel_layout_from_mask(&ch_layout, out->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
} else
#endif
if ((err = av_channel_layout_copy(&ch_layout, &out->ch_layout)) < 0)
return err;
if (av_channel_layout_compare(&s->out_ch_layout, &ch_layout) ||
s->out_sample_rate != out->sample_rate ||
s->out_sample_fmt != out->format) {
ret |= AVERROR_OUTPUT_CHANGED;
}
}
av_channel_layout_uninit(&ch_layout);
return ret;
}
static inline int convert_frame(SwrContext *s,
AVFrame *out, const AVFrame *in)
{
int ret;
uint8_t **out_data = NULL;
const uint8_t **in_data = NULL;
int out_nb_samples = 0, in_nb_samples = 0;
if (out) {
out_data = out->extended_data;
out_nb_samples = out->nb_samples;
}
if (in) {
in_data = (const uint8_t **)in->extended_data;
in_nb_samples = in->nb_samples;
}
ret = swr_convert(s, out_data, out_nb_samples, in_data, in_nb_samples);
if (ret < 0) {
if (out)
out->nb_samples = 0;
return ret;
}
if (out)
out->nb_samples = ret;
return 0;
}
static inline int available_samples(AVFrame *out)
{
int bytes_per_sample = av_get_bytes_per_sample(out->format);
int samples = out->linesize[0] / bytes_per_sample;
if (av_sample_fmt_is_planar(out->format)) {
return samples;
} else {
int channels;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
channels = av_get_channel_layout_nb_channels(out->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
if (!channels)
#endif
channels = out->ch_layout.nb_channels;
return samples / channels;
}
}
int swr_convert_frame(SwrContext *s,
AVFrame *out, const AVFrame *in)
{
int ret, setup = 0;
if (!swr_is_initialized(s)) {
if ((ret = swr_config_frame(s, out, in)) < 0)
return ret;
if ((ret = swr_init(s)) < 0)
return ret;
setup = 1;
} else {
// return as is or reconfigure for input changes?
if ((ret = config_changed(s, out, in)))
return ret;
}
if (out) {
if (!out->linesize[0]) {
out->nb_samples = swr_get_delay(s, s->out_sample_rate) + 3;
if (in) {
out->nb_samples += in->nb_samples*(int64_t)s->out_sample_rate / s->in_sample_rate;
}
if ((ret = av_frame_get_buffer(out, 0)) < 0) {
if (setup)
swr_close(s);
return ret;
}
} else {
if (!out->nb_samples)
out->nb_samples = available_samples(out);
}
}
return convert_frame(s, out, in);
}
|
