2 Copyright (C) 2012-2015 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.
22 #include "sndfile_content.h"
23 #include "sndfile_decoder.h"
24 #include "exceptions.h"
25 #include "audio_buffers.h"
33 using boost::shared_ptr;
35 SndfileDecoder::SndfileDecoder (shared_ptr<const SndfileContent> c)
39 , _remaining (_info.frames)
40 , _deinterleave_buffer (0)
45 SndfileDecoder::~SndfileDecoder ()
47 delete[] _deinterleave_buffer;
51 SndfileDecoder::pass ()
53 if (_remaining == 0) {
57 /* Do things in half second blocks as I think there may be limits
58 to what FFmpeg (and in particular the resampler) can cope with.
60 sf_count_t const block = _sndfile_content->audio_stream()->frame_rate() / 2;
61 sf_count_t const this_time = min (block, _remaining);
63 int const channels = _sndfile_content->audio_stream()->channels ();
65 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, this_time));
67 if (_sndfile_content->audio_stream()->channels() == 1) {
68 /* No de-interleaving required */
69 sf_read_float (_sndfile, data->data(0), this_time);
72 if (!_deinterleave_buffer) {
73 _deinterleave_buffer = new float[block * channels];
75 sf_readf_float (_sndfile, _deinterleave_buffer, this_time);
76 vector<float*> out_ptr (channels);
77 for (int i = 0; i < channels; ++i) {
78 out_ptr[i] = data->data(i);
80 float* in_ptr = _deinterleave_buffer;
81 for (int i = 0; i < this_time; ++i) {
82 for (int j = 0; j < channels; ++j) {
83 *out_ptr[j]++ = *in_ptr++;
88 data->set_frames (this_time);
89 audio (_sndfile_content->audio_stream (), data, ContentTime::from_frames (_done, _info.samplerate));
91 _remaining -= this_time;
93 return _remaining == 0;
97 SndfileDecoder::seek (ContentTime t, bool accurate)
99 AudioDecoder::seek (t, accurate);
101 _done = t.frames_round (_info.samplerate);
102 _remaining = _info.frames - _done;