104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MEDIA_BASE_VIDEO_STREAM_INFO_H_
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#define MEDIA_BASE_VIDEO_STREAM_INFO_H_
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#include "packager/media/base/stream_info.h"
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namespace edash_packager {
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namespace media {
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enum VideoCodec {
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kUnknownVideoCodec = 0,
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kCodecH264,
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kCodecVC1,
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kCodecMPEG2,
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kCodecMPEG4,
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kCodecTheora,
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kCodecVP8,
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kCodecVP9,
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kNumVideoCodec
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};
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/// Holds video stream information.
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class VideoStreamInfo : public StreamInfo {
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public:
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/// Construct an initialized video stream info object.
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/// If @a codec is @a kCodecH264 and either @pixel_width and @pixel_height is
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/// 0 (unknown), then this tries to parse @extra_data to extract the pixel
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/// width and height from it.
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/// @param pixel_width is the width of the pixel. 0 if unknown.
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/// @param pixel_height is the height of the pixels. 0 if unknown.
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VideoStreamInfo(int track_id,
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uint32_t time_scale,
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uint64_t duration,
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VideoCodec codec,
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const std::string& codec_string,
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const std::string& language,
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uint16_t width,
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uint16_t height,
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uint32_t pixel_width,
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uint32_t pixel_height,
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int16_t trick_play_rate,
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uint8_t nalu_length_size,
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const uint8_t* extra_data,
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size_t extra_data_size,
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bool is_encrypted);
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/// @name StreamInfo implementation overrides.
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/// @{
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virtual bool IsValidConfig() const OVERRIDE;
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virtual std::string ToString() const OVERRIDE;
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/// @}
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VideoCodec codec() const { return codec_; }
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uint16_t width() const { return width_; }
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uint16_t height() const { return height_; }
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/// Returns the pixel width.
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/// @return 0 if unknown.
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uint32_t pixel_width() const { return pixel_width_; }
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/// Returns the pixel height.
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/// @return 0 if unknown.
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uint32_t pixel_height() const { return pixel_height_; }
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uint8_t nalu_length_size() const { return nalu_length_size_; }
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int16_t trick_play_rate() const { return trick_play_rate_; }
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/// @param profile,compatible_profiles,level are only used by H.264 codec.
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/// @return The codec string.
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static std::string GetCodecString(VideoCodec codec,
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uint8_t profile,
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uint8_t compatible_profiles,
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uint8_t level);
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private:
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virtual ~VideoStreamInfo();
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VideoCodec codec_;
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uint16_t width_;
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uint16_t height_;
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// pixel_width_:pixel_height_ is the sample aspect ratio.
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// 0 means unknown.
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uint32_t pixel_width_;
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uint32_t pixel_height_;
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int16_t trick_play_rate_; // Non-zero for trick-play streams.
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// Specifies the normalized size of the NAL unit length field. Can be 1, 2 or
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// 4 bytes, or 0 if the size if unknown or the stream is not a AVC stream
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// (H.264).
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uint8_t nalu_length_size_;
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// Not using DISALLOW_COPY_AND_ASSIGN here intentionally to allow the compiler
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// generated copy constructor and assignment operator. Since the extra data is
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// typically small, the performance impact is minimal.
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};
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} // namespace media
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} // namespace edash_packager
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#endif // MEDIA_BASE_VIDEO_STREAM_INFO_H_
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