71d3ed711acb14a7448904dc46eeff1be531d216
2 * Copyright (c) 2014 Luca Barbato <lu_zero@gentoo.org>
3 * Copyright (c) 2014 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "swresample_internal.h"
23 #include "libavutil/frame.h"
24 #include "libavutil/opt.h"
26 int swr_config_frame(SwrContext
*s
, const AVFrame
*out
, const AVFrame
*in
)
31 if (av_opt_set_int(s
, "icl", in
->channel_layout
, 0) < 0)
33 if (av_opt_set_int(s
, "isf", in
->format
, 0) < 0)
35 if (av_opt_set_int(s
, "isr", in
->sample_rate
, 0) < 0)
40 if (av_opt_set_int(s
, "ocl", out
->channel_layout
, 0) < 0)
42 if (av_opt_set_int(s
, "osf", out
->format
, 0) < 0)
44 if (av_opt_set_int(s
, "osr", out
->sample_rate
, 0) < 0)
50 av_log(s
, AV_LOG_ERROR
, "Failed to set option\n");
51 return AVERROR(EINVAL
);
54 static int config_changed(SwrContext
*s
,
55 const AVFrame
*out
, const AVFrame
*in
)
60 if (s
->in_ch_layout
!= in
->channel_layout
||
61 s
->in_sample_rate
!= in
->sample_rate
||
62 s
->in_sample_fmt
!= in
->format
) {
63 ret
|= AVERROR_INPUT_CHANGED
;
68 if (s
->out_ch_layout
!= out
->channel_layout
||
69 s
->out_sample_rate
!= out
->sample_rate
||
70 s
->out_sample_fmt
!= out
->format
) {
71 ret
|= AVERROR_OUTPUT_CHANGED
;
78 static inline int convert_frame(SwrContext
*s
,
79 AVFrame
*out
, const AVFrame
*in
)
82 uint8_t **out_data
= NULL
;
83 const uint8_t **in_data
= NULL
;
84 int out_nb_samples
= 0, in_nb_samples
= 0;
87 out_data
= out
->extended_data
;
88 out_nb_samples
= out
->nb_samples
;
92 in_data
= (const uint8_t **)in
->extended_data
;
93 in_nb_samples
= in
->nb_samples
;
96 ret
= swr_convert(s
, out_data
, out_nb_samples
, in_data
, in_nb_samples
);
105 out
->nb_samples
= ret
;
110 static inline int available_samples(AVFrame
*out
)
112 int bytes_per_sample
= av_get_bytes_per_sample(out
->format
);
113 int samples
= out
->linesize
[0] / bytes_per_sample
;
115 if (av_sample_fmt_is_planar(out
->format
)) {
118 int channels
= av_get_channel_layout_nb_channels(out
->channel_layout
);
119 return samples
/ channels
;
123 int swr_convert_frame(SwrContext
*s
,
124 AVFrame
*out
, const AVFrame
*in
)
128 if (!swr_is_initialized(s
)) {
129 if ((ret
= swr_config_frame(s
, out
, in
)) < 0)
131 if ((ret
= swr_init(s
)) < 0)
135 // return as is or reconfigure for input changes?
136 if ((ret
= config_changed(s
, out
, in
)))
141 if (!out
->linesize
[0]) {
142 out
->nb_samples
= swr_get_delay(s
, s
->out_sample_rate
)
143 + in
->nb_samples
*(int64_t)s
->out_sample_rate
/ s
->in_sample_rate
145 if ((ret
= av_frame_get_buffer(out
, 0)) < 0) {
151 if (!out
->nb_samples
)
152 out
->nb_samples
= available_samples(out
);
156 return convert_frame(s
, out
, in
);