/*
Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ libdcp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
#include "sound_asset_writer.h"
#include "exceptions.h"
#include "dcp_assert.h"
#include "compose.hpp"
-#include "AS_DCP.h"
+#include "encryption_context.h"
+#include <asdcp/AS_DCP.h>
+using std::min;
+using std::max;
using namespace dcp;
struct SoundAssetWriter::ASDCPState
ASDCP::PCM::AudioDescriptor audio_desc;
};
-SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, Standard standard)
- : AssetWriter (asset, file)
+SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, Standard standard, ChannelAssignment assign)
+ : AssetWriter (asset, file, standard)
, _state (new SoundAssetWriter::ASDCPState)
, _sound_asset (asset)
, _frame_buffer_offset (0)
_state->audio_desc.BlockAlign = 3 * _sound_asset->channels();
_state->audio_desc.AvgBps = _sound_asset->sampling_rate() * _state->audio_desc.BlockAlign;
_state->audio_desc.LinkedTrackID = 0;
- _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
+ if (standard == INTEROP) {
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
+ } else {
+ switch (assign) {
+ case CHANNEL_ASSIGNMENT_51:
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_CFG_1;
+ break;
+ case CHANNEL_ASSIGNMENT_61:
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_CFG_2;
+ break;
+ case CHANNEL_ASSIGNMENT_71:
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_CFG_3;
+ break;
+ case CHANNEL_ASSIGNMENT_WTF:
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_CFG_4;
+ break;
+ case CHANNEL_ASSIGNMENT_71_DS:
+ _state->audio_desc.ChannelFormat = ASDCP::PCM::CF_CFG_5;
+ break;
+ }
+ }
_state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
_state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
{
DCP_ASSERT (!_finalized);
+ static float const clip = 1.0f - (1.0f / pow (2, 23));
+
if (!_started) {
Kumu::Result_t r = _state->mxf_writer.OpenWrite (_file.string().c_str(), _state->writer_info, _state->audio_desc);
if (ASDCP_FAILURE (r)) {
_started = true;
}
+ int const ch = _sound_asset->channels ();
+
for (int i = 0; i < frames; ++i) {
byte_t* out = _state->frame_buffer.Data() + _frame_buffer_offset;
/* Write one sample per channel */
- for (int j = 0; j < _sound_asset->channels(); ++j) {
- int32_t const s = data[j][i] * (1 << 23);
+ for (int j = 0; j < ch; ++j) {
+ /* Convert sample to 24-bit int, clipping if necessary. */
+ float x = data[j][i];
+ if (x > clip) {
+ x = clip;
+ } else if (x < -clip) {
+ x = -clip;
+ }
+ int32_t const s = x * (1 << 23);
*out++ = (s & 0xff);
*out++ = (s & 0xff00) >> 8;
*out++ = (s & 0xff0000) >> 16;
}
- _frame_buffer_offset += 3 * _sound_asset->channels();
+ _frame_buffer_offset += 3 * ch;
DCP_ASSERT (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
void
SoundAssetWriter::write_current_frame ()
{
- ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _encryption_context, 0);
+ ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _encryption_context->encryption(), _encryption_context->hmac());
if (ASDCP_FAILURE (r)) {
boost::throw_exception (MiscError (String::compose ("could not write audio MXF frame (%1)", int (r))));
}
projects / libdcp.git / blobdiff