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/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "./webmenc.h"
#include <string>
#include "third_party/libwebm/mkvmuxer/mkvmuxer.h"
#include "third_party/libwebm/mkvmuxer/mkvmuxerutil.h"
#include "third_party/libwebm/mkvmuxer/mkvwriter.h"
namespace {
const uint64_t kDebugTrackUid = 0xDEADBEEF;
const int kVideoTrackNumber = 1;
} // namespace
void write_webm_file_header(struct WebmOutputContext *webm_ctx,
const vpx_codec_enc_cfg_t *cfg,
const struct vpx_rational *fps,
stereo_format_t stereo_fmt,
unsigned int fourcc,
const struct VpxRational *par) {
mkvmuxer::MkvWriter *const writer = new mkvmuxer::MkvWriter(webm_ctx->stream);
mkvmuxer::Segment *const segment = new mkvmuxer::Segment();
segment->Init(writer);
segment->set_mode(mkvmuxer::Segment::kFile);
segment->OutputCues(true);
mkvmuxer::SegmentInfo *const info = segment->GetSegmentInfo();
const uint64_t kTimecodeScale = 1000000;
info->set_timecode_scale(kTimecodeScale);
std::string version = "vpxenc";
if (!webm_ctx->debug) {
version.append(std::string(" ") + vpx_codec_version_str());
}
info->set_writing_app(version.c_str());
const uint64_t video_track_id =
segment->AddVideoTrack(static_cast<int>(cfg->g_w),
static_cast<int>(cfg->g_h),
kVideoTrackNumber);
mkvmuxer::VideoTrack* const video_track =
static_cast<mkvmuxer::VideoTrack*>(
segment->GetTrackByNumber(video_track_id));
video_track->SetStereoMode(stereo_fmt);
const char *codec_id;
switch (fourcc) {
case VP8_FOURCC:
codec_id = "V_VP8";
break;
case VP9_FOURCC:
default:
codec_id = "V_VP9";
break;
}
video_track->set_codec_id(codec_id);
if (par->numerator > 1 || par->denominator > 1) {
// TODO(fgalligan): Add support of DisplayUnit, Display Aspect Ratio type
// to WebM format.
const uint64_t display_width =
static_cast<uint64_t>(((cfg->g_w * par->numerator * 1.0) /
par->denominator) + .5);
video_track->set_display_width(display_width);
video_track->set_display_height(cfg->g_h);
}
if (webm_ctx->debug) {
video_track->set_uid(kDebugTrackUid);
}
webm_ctx->writer = writer;
webm_ctx->segment = segment;
}
void write_webm_block(struct WebmOutputContext *webm_ctx,
const vpx_codec_enc_cfg_t *cfg,
const vpx_codec_cx_pkt_t *pkt) {
mkvmuxer::Segment *const segment =
reinterpret_cast<mkvmuxer::Segment*>(webm_ctx->segment);
int64_t pts_ns = pkt->data.frame.pts * 1000000000ll *
cfg->g_timebase.num / cfg->g_timebase.den;
if (pts_ns <= webm_ctx->last_pts_ns)
pts_ns = webm_ctx->last_pts_ns + 1000000;
webm_ctx->last_pts_ns = pts_ns;
segment->AddFrame(static_cast<uint8_t*>(pkt->data.frame.buf),
pkt->data.frame.sz,
kVideoTrackNumber,
pts_ns,
pkt->data.frame.flags & VPX_FRAME_IS_KEY);
}
void write_webm_file_footer(struct WebmOutputContext *webm_ctx) {
mkvmuxer::MkvWriter *const writer =
reinterpret_cast<mkvmuxer::MkvWriter*>(webm_ctx->writer);
mkvmuxer::Segment *const segment =
reinterpret_cast<mkvmuxer::Segment*>(webm_ctx->segment);
segment->Finalize();
delete segment;
delete writer;
webm_ctx->writer = NULL;
webm_ctx->segment = NULL;
}
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