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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include "common/webmenc.h"
#include <stdio.h>
#include <string.h>
#include <memory>
#include <new>
#include <string>
#include "common/av1_config.h"
#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;
// Simplistic mechanism to detect if an argv parameter refers to
// an input or output file. Returns the total number of arguments that
// should be skipped.
int skip_input_output_arg(const char *arg, const char *input_fname) {
if (strcmp(arg, input_fname) == 0) {
return 1;
}
if (strcmp(arg, "-o") == 0 || strcmp(arg, "--output") == 0) {
return 2;
}
if (strncmp(arg, "--output=", strlen("--output=")) == 0) {
return 1;
}
return 0;
}
} // namespace
char *extract_encoder_settings(const char *version, const char **argv, int argc,
const char *input_fname) {
// + 9 for "version:" prefix and for null terminator.
size_t total_size = strlen(version) + 9;
int i = 1;
while (i < argc) {
int num_skip = skip_input_output_arg(argv[i], input_fname);
i += num_skip;
if (num_skip == 0) {
total_size += strlen(argv[i]) + 1; // + 1 is for space separator.
++i;
}
}
char *result = static_cast<char *>(malloc(total_size));
if (result == nullptr) {
return nullptr;
}
char *cur = result;
cur += snprintf(cur, total_size, "version:%s", version);
i = 1;
while (i < argc) {
int num_skip = skip_input_output_arg(argv[i], input_fname);
i += num_skip;
if (num_skip == 0) {
cur += snprintf(cur, total_size, " %s", argv[i]);
++i;
}
}
*cur = '\0';
return result;
}
int write_webm_file_header(struct WebmOutputContext *webm_ctx,
aom_codec_ctx_t *encoder_ctx,
const aom_codec_enc_cfg_t *cfg,
stereo_format_t stereo_fmt, unsigned int fourcc,
const struct AvxRational *par,
const char *encoder_settings) {
std::unique_ptr<mkvmuxer::MkvWriter> writer(
new (std::nothrow) mkvmuxer::MkvWriter(webm_ctx->stream));
std::unique_ptr<mkvmuxer::Segment> segment(new (std::nothrow)
mkvmuxer::Segment());
if (writer == nullptr || segment == nullptr) {
fprintf(stderr, "webmenc> mkvmuxer objects alloc failed, out of memory?\n");
return -1;
}
bool ok = segment->Init(writer.get());
if (!ok) {
fprintf(stderr, "webmenc> mkvmuxer Init failed.\n");
return -1;
}
segment->set_mode(mkvmuxer::Segment::kFile);
segment->OutputCues(true);
mkvmuxer::SegmentInfo *const info = segment->GetSegmentInfo();
if (!info) {
fprintf(stderr, "webmenc> Cannot retrieve Segment Info.\n");
return -1;
}
const uint64_t kTimecodeScale = 1000000;
info->set_timecode_scale(kTimecodeScale);
std::string version = "aomenc";
if (!webm_ctx->debug) {
version.append(std::string(" ") + aom_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));
if (!video_track) {
fprintf(stderr, "webmenc> Video track creation failed.\n");
return -1;
}
ok = false;
aom_fixed_buf_t *obu_sequence_header =
aom_codec_get_global_headers(encoder_ctx);
if (obu_sequence_header) {
Av1Config av1_config;
if (get_av1config_from_obu(
reinterpret_cast<const uint8_t *>(obu_sequence_header->buf),
obu_sequence_header->sz, false, &av1_config) == 0) {
uint8_t av1_config_buffer[4] = { 0 };
size_t bytes_written = 0;
if (write_av1config(&av1_config, sizeof(av1_config_buffer),
&bytes_written, av1_config_buffer) == 0) {
ok = video_track->SetCodecPrivate(av1_config_buffer,
sizeof(av1_config_buffer));
}
}
free(obu_sequence_header->buf);
free(obu_sequence_header);
}
if (!ok) {
fprintf(stderr, "webmenc> Unable to set AV1 config.\n");
return -1;
}
ok = video_track->SetStereoMode(stereo_fmt);
if (!ok) {
fprintf(stderr, "webmenc> Unable to set stereo mode.\n");
return -1;
}
if (fourcc != AV1_FOURCC) {
fprintf(stderr, "webmenc> Unsupported codec (unknown 4 CC).\n");
return -1;
}
video_track->set_codec_id("V_AV1");
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 (encoder_settings != nullptr) {
mkvmuxer::Tag *tag = segment->AddTag();
if (tag == nullptr) {
fprintf(stderr,
"webmenc> Unable to allocate memory for encoder settings tag.\n");
return -1;
}
ok = tag->add_simple_tag("ENCODER_SETTINGS", encoder_settings);
if (!ok) {
fprintf(stderr,
"webmenc> Unable to allocate memory for encoder settings tag.\n");
return -1;
}
}
if (webm_ctx->debug) {
video_track->set_uid(kDebugTrackUid);
}
webm_ctx->writer = writer.release();
webm_ctx->segment = segment.release();
return 0;
}
int write_webm_block(struct WebmOutputContext *webm_ctx,
const aom_codec_enc_cfg_t *cfg,
const aom_codec_cx_pkt_t *pkt) {
if (!webm_ctx->segment) {
fprintf(stderr, "webmenc> segment is NULL.\n");
return -1;
}
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;
if (!segment->AddFrame(static_cast<uint8_t *>(pkt->data.frame.buf),
pkt->data.frame.sz, kVideoTrackNumber, pts_ns,
pkt->data.frame.flags & AOM_FRAME_IS_KEY)) {
fprintf(stderr, "webmenc> AddFrame failed.\n");
return -1;
}
return 0;
}
int write_webm_file_footer(struct WebmOutputContext *webm_ctx) {
if (!webm_ctx->writer || !webm_ctx->segment) {
fprintf(stderr, "webmenc> segment or writer NULL.\n");
return -1;
}
mkvmuxer::MkvWriter *const writer =
reinterpret_cast<mkvmuxer::MkvWriter *>(webm_ctx->writer);
mkvmuxer::Segment *const segment =
reinterpret_cast<mkvmuxer::Segment *>(webm_ctx->segment);
const bool ok = segment->Finalize();
delete segment;
delete writer;
webm_ctx->writer = NULL;
webm_ctx->segment = NULL;
if (!ok) {
fprintf(stderr, "webmenc> Segment::Finalize failed.\n");
return -1;
}
return 0;
}
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