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 directory, boost::filesystem::path mxf_name)
46 : MXF (directory, mxf_name)
56 ASDCP::PCM::MXFReader reader;
57 Kumu::Result_t r = reader.OpenRead (path().string().c_str());
58 if (ASDCP_FAILURE (r)) {
59 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string(), r));
62 ASDCP::PCM::AudioDescriptor desc;
63 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
64 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
67 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
68 _channels = desc.ChannelCount;
69 _edit_rate = desc.EditRate.Numerator;
70 assert (desc.EditRate.Denominator == 1);
71 _intrinsic_duration = desc.ContainerDuration;
75 SoundMXF::cpl_node_name () const
81 SoundMXF::equals (shared_ptr<const ContentAsset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
83 if (!MXF::equals (other, opt, note)) {
87 ASDCP::PCM::MXFReader reader_A;
88 Kumu::Result_t r = reader_A.OpenRead (path().string().c_str());
89 if (ASDCP_FAILURE (r)) {
90 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string(), r));
93 ASDCP::PCM::MXFReader reader_B;
94 r = reader_B.OpenRead (other->path().string().c_str());
95 if (ASDCP_FAILURE (r)) {
96 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string(), r));
99 ASDCP::PCM::AudioDescriptor desc_A;
100 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
101 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
103 ASDCP::PCM::AudioDescriptor desc_B;
104 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
105 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
109 desc_A.EditRate != desc_B.EditRate ||
110 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
111 desc_A.Locked != desc_B.Locked ||
112 desc_A.ChannelCount != desc_B.ChannelCount ||
113 desc_A.QuantizationBits != desc_B.QuantizationBits ||
114 desc_A.BlockAlign != desc_B.BlockAlign ||
115 desc_A.AvgBps != desc_B.AvgBps ||
116 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
117 desc_A.ContainerDuration != desc_B.ContainerDuration
118 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
121 note (ERROR, "audio MXF picture descriptors differ");
125 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
126 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
128 for (int i = 0; i < _intrinsic_duration; ++i) {
129 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
130 boost::throw_exception (DCPReadError ("could not read audio frame"));
133 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
134 boost::throw_exception (DCPReadError ("could not read audio frame"));
137 if (buffer_A.Size() != buffer_B.Size()) {
138 note (ERROR, "sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
142 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
143 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
144 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
145 if (d > opt.max_audio_sample_error) {
146 note (ERROR, "PCM data difference of " + lexical_cast<string> (d));
156 shared_ptr<const SoundFrame>
157 SoundMXF::get_frame (int n) const
159 /* XXX: should add on entry point here? */
160 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n, _decryption_context));
163 shared_ptr<SoundMXFWriter>
164 SoundMXF::start_write ()
166 /* XXX: can't we use a shared_ptr here? */
167 return shared_ptr<SoundMXFWriter> (new SoundMXFWriter (this));
170 struct SoundMXFWriter::ASDCPState
172 ASDCP::PCM::MXFWriter mxf_writer;
173 ASDCP::PCM::FrameBuffer frame_buffer;
174 ASDCP::WriterInfo writer_info;
175 ASDCP::PCM::AudioDescriptor audio_desc;
176 ASDCP::AESEncContext* encryption_context;
179 SoundMXFWriter::SoundMXFWriter (SoundMXF* a)
180 : _state (new SoundMXFWriter::ASDCPState)
183 , _frames_written (0)
184 , _frame_buffer_offset (0)
186 _state->encryption_context = a->encryption_context ();
188 /* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
189 _state->audio_desc.EditRate = ASDCP::Rational (_asset->edit_rate(), 1);
190 _state->audio_desc.AudioSamplingRate = ASDCP::Rational (_asset->sampling_rate(), 1);
191 _state->audio_desc.Locked = 0;
192 _state->audio_desc.ChannelCount = _asset->channels ();
193 _state->audio_desc.QuantizationBits = 24;
194 _state->audio_desc.BlockAlign = 3 * _asset->channels();
195 _state->audio_desc.AvgBps = _asset->sampling_rate() * _state->audio_desc.BlockAlign;
196 _state->audio_desc.LinkedTrackID = 0;
197 _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
199 _state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
200 _state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
201 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
203 _asset->fill_writer_info (&_state->writer_info);
205 Kumu::Result_t r = _state->mxf_writer.OpenWrite (_asset->path().string().c_str(), _state->writer_info, _state->audio_desc);
206 if (ASDCP_FAILURE (r)) {
207 boost::throw_exception (FileError ("could not open audio MXF for writing", _asset->path().string(), r));
212 SoundMXFWriter::write (float const * const * data, int frames)
214 for (int i = 0; i < frames; ++i) {
216 byte_t* out = _state->frame_buffer.Data() + _frame_buffer_offset;
218 /* Write one sample per channel */
219 for (int j = 0; j < _asset->channels(); ++j) {
220 int32_t const s = data[j][i] * (1 << 23);
222 *out++ = (s & 0xff00) >> 8;
223 *out++ = (s & 0xff0000) >> 16;
225 _frame_buffer_offset += 3 * _asset->channels();
227 assert (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
229 /* Finish the MXF frame if required */
230 if (_frame_buffer_offset == int (_state->frame_buffer.Capacity())) {
231 write_current_frame ();
232 _frame_buffer_offset = 0;
233 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
239 SoundMXFWriter::write_current_frame ()
241 ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _state->encryption_context, 0);
242 if (ASDCP_FAILURE (r)) {
243 boost::throw_exception (MiscError ("could not write audio MXF frame (" + lexical_cast<string> (int (r)) + ")"));
250 SoundMXFWriter::finalize ()
252 if (_frame_buffer_offset > 0) {
253 write_current_frame ();
256 if (ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
257 boost::throw_exception (MiscError ("could not finalise audio MXF"));
261 _asset->set_intrinsic_duration (_frames_written);
262 _asset->set_duration (_frames_written);
266 SoundMXF::key_type () const