2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #ifdef DCPOMATIC_WINDOWS
23 #define ENABLE_SNDFILE_WINDOWS_PROTOTYPES 1
26 #include "sndfile_content.h"
27 #include "sndfile_decoder.h"
29 #include "exceptions.h"
30 #include "audio_buffers.h"
38 using boost::shared_ptr;
40 SndfileDecoder::SndfileDecoder (shared_ptr<const Film> f, shared_ptr<const SndfileContent> c)
43 , _sndfile_content (c)
44 , _deinterleave_buffer (0)
48 /* Here be monsters. See fopen_boost for similar shenanigans */
49 #ifdef DCPOMATIC_WINDOWS
50 _sndfile = sf_wchar_open (_sndfile_content->path(0).c_str(), SFM_READ, &_info);
52 _sndfile = sf_open (_sndfile_content->path(0).string().c_str(), SFM_READ, &_info);
56 throw DecodeError (_("could not open audio file for reading"));
60 _remaining = _info.frames;
63 SndfileDecoder::~SndfileDecoder ()
66 delete[] _deinterleave_buffer;
70 SndfileDecoder::pass ()
72 /* Do things in half second blocks as I think there may be limits
73 to what FFmpeg (and in particular the resampler) can cope with.
75 sf_count_t const block = _sndfile_content->content_audio_frame_rate() / 2;
76 sf_count_t const this_time = min (block, _remaining);
78 int const channels = _sndfile_content->audio_channels ();
80 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, this_time));
82 if (_sndfile_content->audio_channels() == 1) {
83 /* No de-interleaving required */
84 sf_read_float (_sndfile, data->data(0), this_time);
87 if (!_deinterleave_buffer) {
88 _deinterleave_buffer = new float[block * channels];
90 sf_readf_float (_sndfile, _deinterleave_buffer, this_time);
91 vector<float*> out_ptr (channels);
92 for (int i = 0; i < channels; ++i) {
93 out_ptr[i] = data->data(i);
95 float* in_ptr = _deinterleave_buffer;
96 for (int i = 0; i < this_time; ++i) {
97 for (int j = 0; j < channels; ++j) {
98 *out_ptr[j]++ = *in_ptr++;
103 data->set_frames (this_time);
106 _remaining -= this_time;
110 SndfileDecoder::audio_channels () const
112 return _info.channels;
116 SndfileDecoder::audio_length () const
122 SndfileDecoder::audio_frame_rate () const
124 return _info.samplerate;
128 SndfileDecoder::done () const
130 return _audio_position >= _sndfile_content->audio_length ();