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_asset.h"
33 #include "exceptions.h"
34 #include "sound_frame.h"
37 using std::stringstream;
41 using boost::shared_ptr;
42 using boost::lexical_cast;
43 using namespace libdcp;
45 SoundAsset::SoundAsset (
46 vector<boost::filesystem::path> const & files,
47 boost::filesystem::path directory,
49 boost::signals2::signal<void (float)>* progress,
51 int intrinsic_duration,
53 MXFMetadata const & metadata
55 : MXFAsset (directory, mxf_name, progress, fps, intrinsic_duration)
56 , _channels (files.size ())
61 construct (boost::bind (&SoundAsset::path_from_channel, this, _1, files), interop, metadata);
64 SoundAsset::SoundAsset (
65 boost::function<boost::filesystem::path (Channel)> get_path,
66 boost::filesystem::path directory,
68 boost::signals2::signal<void (float)>* progress,
70 int intrinsic_duration,
73 MXFMetadata const & metadata
75 : MXFAsset (directory, mxf_name, progress, fps, intrinsic_duration)
76 , _channels (channels)
81 construct (get_path, interop, metadata);
84 SoundAsset::SoundAsset (boost::filesystem::path directory, string mxf_name)
85 : MXFAsset (directory, mxf_name)
88 ASDCP::PCM::MXFReader reader;
89 if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
90 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string()));
93 ASDCP::PCM::AudioDescriptor desc;
94 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
95 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
98 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
99 _channels = desc.ChannelCount;
100 _edit_rate = desc.EditRate.Numerator;
101 assert (desc.EditRate.Denominator == 1);
102 _intrinsic_duration = desc.ContainerDuration;
105 SoundAsset::SoundAsset (boost::filesystem::path directory, string mxf_name, int fps, int channels, int sampling_rate)
106 : MXFAsset (directory, mxf_name, 0, fps, 0)
107 , _channels (channels)
108 , _sampling_rate (sampling_rate)
113 boost::filesystem::path
114 SoundAsset::path_from_channel (Channel channel, vector<boost::filesystem::path> const & files)
116 unsigned int const c = int (channel);
117 assert (c < files.size ());
122 SoundAsset::construct (boost::function<boost::filesystem::path (Channel)> get_path, bool interop, MXFMetadata const & metadata)
124 ASDCP::Rational asdcp_edit_rate (_edit_rate, 1);
126 ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
127 if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_edit_rate)) {
128 boost::throw_exception (FileError ("could not open WAV file for reading", get_path(LEFT)));
131 ASDCP::PCM::AudioDescriptor audio_desc;
132 pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
133 audio_desc.ChannelCount = 0;
134 audio_desc.BlockAlign = 0;
135 audio_desc.EditRate = asdcp_edit_rate;
136 audio_desc.AvgBps = audio_desc.AvgBps * _channels;
138 Channel channels[] = {
145 /* XXX: not quite sure what these should be yet */
150 assert (int(_channels) <= int(sizeof(channels) / sizeof(Channel)));
152 ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
153 ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
155 for (int i = 0; i < _channels; ++i) {
157 boost::filesystem::path const path = get_path (channels[i]);
159 if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_edit_rate))) {
160 boost::throw_exception (FileError ("could not open WAV file for reading", path));
163 pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
164 frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
166 audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
167 audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
170 ASDCP::PCM::FrameBuffer frame_buffer;
171 frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
172 frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
174 ASDCP::WriterInfo writer_info;
175 MXFAsset::fill_writer_info (&writer_info, _uuid, interop, metadata);
177 ASDCP::PCM::MXFWriter mxf_writer;
178 if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, audio_desc))) {
179 boost::throw_exception (FileError ("could not open audio MXF for writing", path().string()));
182 for (int i = 0; i < _intrinsic_duration; ++i) {
184 for (int j = 0; j < _channels; ++j) {
185 memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
186 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
187 boost::throw_exception (MiscError ("could not read audio frame"));
191 byte_t *data_s = frame_buffer.Data();
192 byte_t *data_e = data_s + frame_buffer.Capacity();
193 byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
196 while (data_s < data_e) {
197 for (int j = 0; j < _channels; ++j) {
198 byte_t* frame = frame_buffer_channel[j].Data() + offset;
199 memcpy (data_s, frame, sample_size);
200 data_s += sample_size;
202 offset += sample_size;
205 if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, _encryption_context, 0))) {
206 boost::throw_exception (MiscError ("could not write audio MXF frame"));
210 (*_progress) (0.5 * float (i) / _intrinsic_duration);
214 if (ASDCP_FAILURE (mxf_writer.Finalize())) {
215 boost::throw_exception (MiscError ("could not finalise audio MXF"));
220 SoundAsset::cpl_node_name () const
226 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
228 if (!MXFAsset::equals (other, opt, note)) {
232 ASDCP::PCM::MXFReader reader_A;
233 if (ASDCP_FAILURE (reader_A.OpenRead (path().string().c_str()))) {
234 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string()));
237 ASDCP::PCM::MXFReader reader_B;
238 if (ASDCP_FAILURE (reader_B.OpenRead (other->path().string().c_str()))) {
239 boost::throw_exception (MXFFileError ("could not open MXF file for reading", path().string()));
242 ASDCP::PCM::AudioDescriptor desc_A;
243 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
244 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
246 ASDCP::PCM::AudioDescriptor desc_B;
247 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
248 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
252 desc_A.EditRate != desc_B.EditRate ||
253 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
254 desc_A.Locked != desc_B.Locked ||
255 desc_A.ChannelCount != desc_B.ChannelCount ||
256 desc_A.QuantizationBits != desc_B.QuantizationBits ||
257 desc_A.BlockAlign != desc_B.BlockAlign ||
258 desc_A.AvgBps != desc_B.AvgBps ||
259 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
260 desc_A.ContainerDuration != desc_B.ContainerDuration
261 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
264 note (ERROR, "audio MXF picture descriptors differ");
268 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
269 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
271 for (int i = 0; i < _intrinsic_duration; ++i) {
272 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
273 boost::throw_exception (DCPReadError ("could not read audio frame"));
276 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
277 boost::throw_exception (DCPReadError ("could not read audio frame"));
280 if (buffer_A.Size() != buffer_B.Size()) {
281 note (ERROR, "sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
285 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
286 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
287 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
288 if (d > opt.max_audio_sample_error) {
289 note (ERROR, "PCM data difference of " + lexical_cast<string> (d));
299 shared_ptr<const SoundFrame>
300 SoundAsset::get_frame (int n) const
302 /* XXX: should add on entry point here? */
303 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n, _decryption_context));
306 shared_ptr<SoundAssetWriter>
307 SoundAsset::start_write (bool interop, MXFMetadata const & metadata)
309 /* XXX: can't we use a shared_ptr here? */
310 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this, interop, metadata));
313 struct SoundAssetWriter::ASDCPState
315 ASDCP::PCM::MXFWriter mxf_writer;
316 ASDCP::PCM::FrameBuffer frame_buffer;
317 ASDCP::WriterInfo writer_info;
318 ASDCP::PCM::AudioDescriptor audio_desc;
319 ASDCP::AESEncContext* encryption_context;
322 SoundAssetWriter::SoundAssetWriter (SoundAsset* a, bool interop, MXFMetadata const & m)
323 : _state (new SoundAssetWriter::ASDCPState)
326 , _frames_written (0)
327 , _frame_buffer_offset (0)
330 _state->encryption_context = a->encryption_context ();
332 /* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
333 _state->audio_desc.EditRate = ASDCP::Rational (_asset->edit_rate(), 1);
334 _state->audio_desc.AudioSamplingRate = ASDCP::Rational (_asset->sampling_rate(), 1);
335 _state->audio_desc.Locked = 0;
336 _state->audio_desc.ChannelCount = _asset->channels ();
337 _state->audio_desc.QuantizationBits = 24;
338 _state->audio_desc.BlockAlign = 3 * _asset->channels();
339 _state->audio_desc.AvgBps = _asset->sampling_rate() * _state->audio_desc.BlockAlign;
340 _state->audio_desc.LinkedTrackID = 0;
341 _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
343 _state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
344 _state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
345 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
347 _asset->fill_writer_info (&_state->writer_info, _asset->uuid (), interop, _metadata);
349 if (ASDCP_FAILURE (_state->mxf_writer.OpenWrite (_asset->path().string().c_str(), _state->writer_info, _state->audio_desc))) {
350 boost::throw_exception (FileError ("could not open audio MXF for writing", _asset->path().string()));
355 SoundAssetWriter::write (float const * const * data, int frames)
357 for (int i = 0; i < frames; ++i) {
359 byte_t* out = _state->frame_buffer.Data() + _frame_buffer_offset;
361 /* Write one sample per channel */
362 for (int j = 0; j < _asset->channels(); ++j) {
363 int32_t const s = data[j][i] * (1 << 23);
365 *out++ = (s & 0xff00) >> 8;
366 *out++ = (s & 0xff0000) >> 16;
368 _frame_buffer_offset += 3 * _asset->channels();
370 assert (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
372 /* Finish the MXF frame if required */
373 if (_frame_buffer_offset == int (_state->frame_buffer.Capacity())) {
374 write_current_frame ();
375 _frame_buffer_offset = 0;
376 memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
382 SoundAssetWriter::write_current_frame ()
384 if (ASDCP_FAILURE (_state->mxf_writer.WriteFrame (_state->frame_buffer, _state->encryption_context, 0))) {
385 boost::throw_exception (MiscError ("could not write audio MXF frame"));
392 SoundAssetWriter::finalize ()
394 if (_frame_buffer_offset > 0) {
395 write_current_frame ();
398 if (ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
399 boost::throw_exception (MiscError ("could not finalise audio MXF"));
403 _asset->set_intrinsic_duration (_frames_written);
404 _asset->set_duration (_frames_written);
408 SoundAsset::key_type () const