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.
20 /** @file src/sound_asset.cc
21 * @brief An asset made up of WAV files
26 #include <boost/filesystem.hpp>
27 #include <boost/lexical_cast.hpp>
28 #include <libxml++/nodes/element.h>
29 #include "KM_fileio.h"
31 #include "sound_mxf.h"
33 #include "exceptions.h"
34 #include "sound_frame.h"
37 using std::stringstream;
41 using boost::shared_ptr;
42 using boost::lexical_cast;
45 SoundMXF::SoundMXF (boost::filesystem::path file)
50 ASDCP::PCM::MXFReader reader;
51 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
52 if (ASDCP_FAILURE (r)) {
53 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file.string(), r));
56 ASDCP::PCM::AudioDescriptor desc;
57 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
58 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
61 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
62 _channels = desc.ChannelCount;
63 _edit_rate = desc.EditRate.Numerator;
64 assert (desc.EditRate.Denominator == 1);
65 _intrinsic_duration = desc.ContainerDuration;
69 SoundMXF::cpl_node_name () const
75 SoundMXF::equals (shared_ptr<const Content> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
77 if (!MXF::equals (other, opt, note)) {
81 ASDCP::PCM::MXFReader reader_A;
82 Kumu::Result_t r = reader_A.OpenRead (file().string().c_str());
83 if (ASDCP_FAILURE (r)) {
84 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
87 ASDCP::PCM::MXFReader reader_B;
88 r = reader_B.OpenRead (other->file().string().c_str());
89 if (ASDCP_FAILURE (r)) {
90 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
93 ASDCP::PCM::AudioDescriptor desc_A;
94 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
95 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
97 ASDCP::PCM::AudioDescriptor desc_B;
98 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
99 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
103 desc_A.EditRate != desc_B.EditRate ||
104 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
105 desc_A.Locked != desc_B.Locked ||
106 desc_A.ChannelCount != desc_B.ChannelCount ||
107 desc_A.QuantizationBits != desc_B.QuantizationBits ||
108 desc_A.BlockAlign != desc_B.BlockAlign ||
109 desc_A.AvgBps != desc_B.AvgBps ||
110 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
111 desc_A.ContainerDuration != desc_B.ContainerDuration
112 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
115 note (ERROR, "audio MXF picture descriptors differ");
119 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
120 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
122 for (int i = 0; i < _intrinsic_duration; ++i) {
123 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
124 boost::throw_exception (DCPReadError ("could not read audio frame"));
127 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
128 boost::throw_exception (DCPReadError ("could not read audio frame"));
131 if (buffer_A.Size() != buffer_B.Size()) {
132 note (ERROR, "sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
136 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
137 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
138 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
139 if (d > opt.max_audio_sample_error) {
140 note (ERROR, "PCM data difference of " + lexical_cast<string> (d));
150 shared_ptr<const SoundFrame>
151 SoundMXF::get_frame (int n) const
153 /* XXX: should add on entry point here? */
154 return shared_ptr<const SoundFrame> (new SoundFrame (file().string(), n, _decryption_context));
157 shared_ptr<SoundMXFWriter>
158 SoundMXF::start_write ()
160 /* XXX: can't we use a shared_ptr here? */
161 return shared_ptr<SoundMXFWriter> (new SoundMXFWriter (this));
164 struct SoundMXFWriter::ASDCPState
166 ASDCP::PCM::MXFWriter mxf_writer;
167 ASDCP::PCM::FrameBuffer frame_buffer;
168 ASDCP::WriterInfo writer_info;
169 ASDCP::PCM::AudioDescriptor audio_desc;
170 ASDCP::AESEncContext* encryption_context;
173 SoundMXFWriter::SoundMXFWriter (SoundMXF* a)
174 : _state (new SoundMXFWriter::ASDCPState)
177 , _frames_written (0)
178 , _frame_buffer_offset (0)
180 _state->encryption_context = a->encryption_context ();
182 /* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
183 _state->audio_desc.EditRate = ASDCP::Rational (_asset->edit_rate(), 1);
184 _state->audio_desc.AudioSamplingRate = ASDCP::Rational (_asset->sampling_rate(), 1);
185 _state->audio_desc.Locked = 0;
186 _state->audio_desc.ChannelCount = _asset->channels ();
187 _state->audio_desc.QuantizationBits = 24;
188 _state->audio_desc.BlockAlign = 3 * _asset->channels();
189 _state->audio_desc.AvgBps = _asset->sampling_rate() * _state->audio_desc.BlockAlign;
190 _state->audio_desc.LinkedTrackID = 0;
191 _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
193 _state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
194 _state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
195 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
197 _asset->fill_writer_info (&_state->writer_info);
199 Kumu::Result_t r = _state->mxf_writer.OpenWrite (_asset->file().string().c_str(), _state->writer_info, _state->audio_desc);
200 if (ASDCP_FAILURE (r)) {
201 boost::throw_exception (FileError ("could not open audio MXF for writing", _asset->file().string(), r));
206 SoundMXFWriter::write (float const * const * data, int frames)
208 for (int i = 0; i < frames; ++i) {
210 byte_t* out = _state->frame_buffer.Data() + _frame_buffer_offset;
212 /* Write one sample per channel */
213 for (int j = 0; j < _asset->channels(); ++j) {
214 int32_t const s = data[j][i] * (1 << 23);
216 *out++ = (s & 0xff00) >> 8;
217 *out++ = (s & 0xff0000) >> 16;
219 _frame_buffer_offset += 3 * _asset->channels();
221 assert (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
223 /* Finish the MXF frame if required */
224 if (_frame_buffer_offset == int (_state->frame_buffer.Capacity())) {
225 write_current_frame ();
226 _frame_buffer_offset = 0;
227 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
233 SoundMXFWriter::write_current_frame ()
235 ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _state->encryption_context, 0);
236 if (ASDCP_FAILURE (r)) {
237 boost::throw_exception (MiscError ("could not write audio MXF frame (" + lexical_cast<string> (int (r)) + ")"));
244 SoundMXFWriter::finalize ()
246 if (_frame_buffer_offset > 0) {
247 write_current_frame ();
250 if (ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
251 boost::throw_exception (MiscError ("could not finalise audio MXF"));
255 _asset->set_intrinsic_duration (_frames_written);
256 _asset->set_duration (_frames_written);
260 SoundMXF::key_type () const