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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/utility/media_galleries/media_metadata_parser.h"
#include <string>
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_util.h"
#include "base/task_runner_util.h"
#include "base/threading/thread.h"
#include "chrome/utility/media_galleries/image_metadata_extractor.h"
#include "media/base/audio_video_metadata_extractor.h"
#include "media/base/data_source.h"
namespace metadata {
namespace {
void SetStringScopedPtr(const std::string& value,
scoped_ptr<std::string>* destination) {
DCHECK(destination);
if (!value.empty())
destination->reset(new std::string(value));
}
void SetIntScopedPtr(int value, scoped_ptr<int>* destination) {
DCHECK(destination);
if (value >= 0)
destination->reset(new int(value));
}
void SetDoubleScopedPtr(double value, scoped_ptr<double>* destination) {
DCHECK(destination);
if (value >= 0)
destination->reset(new double(value));
}
void SetBoolScopedPtr(bool value, scoped_ptr<bool>* destination) {
DCHECK(destination);
destination->reset(new bool(value));
}
// This runs on |media_thread_|, as the underlying FFmpeg operation is
// blocking, and the utility thread must not be blocked, so the media file
// bytes can be sent from the browser process to the utility process.
scoped_ptr<MediaMetadataParser::MediaMetadata> ParseAudioVideoMetadata(
media::DataSource* source,
scoped_ptr<MediaMetadataParser::MediaMetadata> metadata) {
DCHECK(source);
DCHECK(metadata.get());
media::AudioVideoMetadataExtractor extractor;
if (!extractor.Extract(source))
return metadata.Pass();
if (extractor.duration() >= 0)
metadata->duration.reset(new double(extractor.duration()));
if (extractor.height() >= 0 && extractor.width() >= 0) {
metadata->height.reset(new int(extractor.height()));
metadata->width.reset(new int(extractor.width()));
}
SetStringScopedPtr(extractor.artist(), &metadata->artist);
SetStringScopedPtr(extractor.album(), &metadata->album);
SetStringScopedPtr(extractor.artist(), &metadata->artist);
SetStringScopedPtr(extractor.comment(), &metadata->comment);
SetStringScopedPtr(extractor.copyright(), &metadata->copyright);
SetIntScopedPtr(extractor.disc(), &metadata->disc);
SetStringScopedPtr(extractor.genre(), &metadata->genre);
SetStringScopedPtr(extractor.language(), &metadata->language);
SetIntScopedPtr(extractor.rotation(), &metadata->rotation);
SetStringScopedPtr(extractor.title(), &metadata->title);
SetIntScopedPtr(extractor.track(), &metadata->track);
return metadata.Pass();
}
void FinishParseImageMetadata(
ImageMetadataExtractor* extractor,
scoped_ptr<MediaMetadataParser::MediaMetadata> metadata,
MediaMetadataParser::MetadataCallback callback,
bool extract_success) {
DCHECK(extractor);
DCHECK(metadata.get());
if (!extract_success) {
callback.Run(metadata.Pass());
return;
}
SetIntScopedPtr(extractor->height(), &metadata->height);
SetIntScopedPtr(extractor->width(), &metadata->width);
SetIntScopedPtr(extractor->rotation(), &metadata->rotation);
SetDoubleScopedPtr(extractor->x_resolution(), &metadata->x_resolution);
SetDoubleScopedPtr(extractor->y_resolution(), &metadata->y_resolution);
SetBoolScopedPtr(extractor->flash_fired(), &metadata->flash_fired);
SetStringScopedPtr(extractor->camera_make(), &metadata->camera_make);
SetStringScopedPtr(extractor->camera_model(), &metadata->camera_model);
SetDoubleScopedPtr(extractor->exposure_time_sec(),
&metadata->exposure_time_seconds);
SetDoubleScopedPtr(extractor->f_number(), &metadata->f_number);
SetDoubleScopedPtr(extractor->focal_length_mm(), &metadata->focal_length_mm);
SetDoubleScopedPtr(extractor->iso_equivalent(), &metadata->iso_equivalent);
callback.Run(metadata.Pass());
}
} // namespace
MediaMetadataParser::MediaMetadataParser(media::DataSource* source,
const std::string& mime_type)
: source_(source),
mime_type_(mime_type) {
}
MediaMetadataParser::~MediaMetadataParser() {}
void MediaMetadataParser::Start(const MetadataCallback& callback) {
scoped_ptr<MediaMetadata> metadata(new MediaMetadata);
metadata->mime_type = mime_type_;
if (StartsWithASCII(mime_type_, "audio/", true) ||
StartsWithASCII(mime_type_, "video/", true)) {
media_thread_.reset(new base::Thread("media_thread"));
CHECK(media_thread_->Start());
base::PostTaskAndReplyWithResult(
media_thread_->message_loop_proxy(),
FROM_HERE,
base::Bind(&ParseAudioVideoMetadata, source_, base::Passed(&metadata)),
callback);
return;
}
if (StartsWithASCII(mime_type_, "image/", true)) {
ImageMetadataExtractor* extractor = new ImageMetadataExtractor;
extractor->Extract(
source_,
base::Bind(&FinishParseImageMetadata, base::Owned(extractor),
base::Passed(&metadata), callback));
return;
}
// TODO(tommycli): Implement for image mime types.
callback.Run(metadata.Pass());
}
} // namespace metadata
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