diff options
Diffstat (limited to 'media/libvpx/libvpx/webmenc.cc')
-rw-r--r-- | media/libvpx/libvpx/webmenc.cc | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/webmenc.cc b/media/libvpx/libvpx/webmenc.cc new file mode 100644 index 0000000000..c718ab5a9f --- /dev/null +++ b/media/libvpx/libvpx/webmenc.cc @@ -0,0 +1,95 @@ +/* + * 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, + 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 = nullptr; + webm_ctx->segment = nullptr; +} |