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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.media;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UnsupportedAppUsage;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.nio.ByteBuffer;
import java.util.AbstractSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Encapsulates the information describing the format of media data, be it audio or video, as
* well as optional feature metadata.
*
* The format of the media data is specified as key/value pairs. Keys are strings. Values can
* be integer, long, float, String or ByteBuffer.
*
* The feature metadata is specificed as string/boolean pairs.
*
* Keys common to all audio/video formats, all keys not marked optional are mandatory:
*
*
* Name Value Type Description {@link #KEY_MIME} String The type of the format. {@link #KEY_MAX_INPUT_SIZE} Integer optional, maximum size of a buffer of input data {@link #KEY_BIT_RATE} Integer encoder-only, desired bitrate in bits/second
*
* Video formats have the following keys:
*
* Name Value Type Description {@link #KEY_WIDTH} Integer {@link #KEY_HEIGHT} Integer {@link #KEY_COLOR_FORMAT} Integer set by the user
* for encoders, readable in the output format of decoders {@link #KEY_FRAME_RATE} Integer or Float required for encoders,
* optional for decoders {@link #KEY_CAPTURE_RATE} Integer {@link #KEY_I_FRAME_INTERVAL} Integer (or Float) encoder-only,
* time-interval between key frames.
* Float support added in {@link android.os.Build.VERSION_CODES#N_MR1} {@link #KEY_INTRA_REFRESH_PERIOD} Integer encoder-only, optional {@link #KEY_LATENCY} Integer encoder-only, optional {@link #KEY_MAX_WIDTH} Integer decoder-only, optional, max-resolution width {@link #KEY_MAX_HEIGHT} Integer decoder-only, optional, max-resolution height {@link #KEY_REPEAT_PREVIOUS_FRAME_AFTER} Long encoder in surface-mode
* only, optional {@link #KEY_PUSH_BLANK_BUFFERS_ON_STOP} Integer(1) decoder rendering
* to a surface only, optional {@link #KEY_TEMPORAL_LAYERING} String encoder only, optional,
* temporal-layering schema
* Specify both {@link #KEY_MAX_WIDTH} and {@link #KEY_MAX_HEIGHT} to enable
* adaptive playback (seamless resolution change) for a video decoder that
* supports it ({@link MediaCodecInfo.CodecCapabilities#FEATURE_AdaptivePlayback}).
* The values are used as hints for the codec: they are the maximum expected
* resolution to prepare for. Depending on codec support, preparing for larger
* maximum resolution may require more memory even if that resolution is never
* reached. These fields have no effect for codecs that do not support adaptive
* playback.
*
* Audio formats have the following keys:
*
* Name Value Type Description {@link #KEY_CHANNEL_COUNT} Integer {@link #KEY_SAMPLE_RATE} Integer {@link #KEY_PCM_ENCODING} Integer optional {@link #KEY_IS_ADTS} Integer optional, if decoding AAC audio content, setting this key to 1 indicates that each audio frame is prefixed by the ADTS header. {@link #KEY_AAC_PROFILE} Integer encoder-only, optional, if content is AAC audio, specifies the desired profile. {@link #KEY_AAC_SBR_MODE} Integer encoder-only, optional, if content is AAC audio, specifies the desired SBR mode. {@link #KEY_AAC_DRC_TARGET_REFERENCE_LEVEL} Integer decoder-only, optional, if content is AAC audio, specifies the target reference level. {@link #KEY_AAC_ENCODED_TARGET_LEVEL} Integer decoder-only, optional, if content is AAC audio, specifies the target reference level used at encoder. {@link #KEY_AAC_DRC_BOOST_FACTOR} Integer decoder-only, optional, if content is AAC audio, specifies the DRC boost factor. {@link #KEY_AAC_DRC_ATTENUATION_FACTOR} Integer decoder-only, optional, if content is AAC audio, specifies the DRC attenuation factor. {@link #KEY_AAC_DRC_HEAVY_COMPRESSION} Integer decoder-only, optional, if content is AAC audio, specifies whether to use heavy compression. {@link #KEY_AAC_MAX_OUTPUT_CHANNEL_COUNT} Integer decoder-only, optional, if content is AAC audio, specifies the maximum number of channels the decoder outputs. {@link #KEY_AAC_DRC_EFFECT_TYPE} Integer decoder-only, optional, if content is AAC audio, specifies the MPEG-D DRC effect type to use. {@link #KEY_CHANNEL_MASK} Integer optional, a mask of audio channel assignments {@link #KEY_FLAC_COMPRESSION_LEVEL} Integer encoder-only, optional, if content is FLAC audio, specifies the desired compression level.
*
* Subtitle formats have the following keys:
*
* {@link #KEY_MIME} String The type of the format. {@link #KEY_LANGUAGE} String The language of the content.
*
* Image formats have the following keys:
*
* {@link #KEY_MIME} String The type of the format. {@link #KEY_WIDTH} Integer {@link #KEY_HEIGHT} Integer {@link #KEY_COLOR_FORMAT} Integer set by the user
* for encoders, readable in the output format of decoders {@link #KEY_TILE_WIDTH} Integer required if the image has grid {@link #KEY_TILE_HEIGHT} Integer required if the image has grid {@link #KEY_GRID_ROWS} Integer required if the image has grid {@link #KEY_GRID_COLUMNS} Integer required if the image has grid
*/
public final class MediaFormat {
public static final String MIMETYPE_VIDEO_VP8 = "video/x-vnd.on2.vp8";
public static final String MIMETYPE_VIDEO_VP9 = "video/x-vnd.on2.vp9";
public static final String MIMETYPE_VIDEO_AV1 = "video/av01";
public static final String MIMETYPE_VIDEO_AVC = "video/avc";
public static final String MIMETYPE_VIDEO_HEVC = "video/hevc";
public static final String MIMETYPE_VIDEO_MPEG4 = "video/mp4v-es";
public static final String MIMETYPE_VIDEO_H263 = "video/3gpp";
public static final String MIMETYPE_VIDEO_MPEG2 = "video/mpeg2";
public static final String MIMETYPE_VIDEO_RAW = "video/raw";
public static final String MIMETYPE_VIDEO_DOLBY_VISION = "video/dolby-vision";
public static final String MIMETYPE_VIDEO_SCRAMBLED = "video/scrambled";
public static final String MIMETYPE_AUDIO_AMR_NB = "audio/3gpp";
public static final String MIMETYPE_AUDIO_AMR_WB = "audio/amr-wb";
public static final String MIMETYPE_AUDIO_MPEG = "audio/mpeg";
public static final String MIMETYPE_AUDIO_AAC = "audio/mp4a-latm";
public static final String MIMETYPE_AUDIO_QCELP = "audio/qcelp";
public static final String MIMETYPE_AUDIO_VORBIS = "audio/vorbis";
public static final String MIMETYPE_AUDIO_OPUS = "audio/opus";
public static final String MIMETYPE_AUDIO_G711_ALAW = "audio/g711-alaw";
public static final String MIMETYPE_AUDIO_G711_MLAW = "audio/g711-mlaw";
public static final String MIMETYPE_AUDIO_RAW = "audio/raw";
public static final String MIMETYPE_AUDIO_FLAC = "audio/flac";
public static final String MIMETYPE_AUDIO_MSGSM = "audio/gsm";
public static final String MIMETYPE_AUDIO_AC3 = "audio/ac3";
public static final String MIMETYPE_AUDIO_EAC3 = "audio/eac3";
public static final String MIMETYPE_AUDIO_EAC3_JOC = "audio/eac3-joc";
public static final String MIMETYPE_AUDIO_AC4 = "audio/ac4";
public static final String MIMETYPE_AUDIO_SCRAMBLED = "audio/scrambled";
/**
* MIME type for HEIF still image data encoded in HEVC.
*
* To decode such an image, {@link MediaCodec} decoder for
* {@link #MIMETYPE_VIDEO_HEVC} shall be used. The client needs to form
* the correct {@link #MediaFormat} based on additional information in
* the track format, and send it to {@link MediaCodec#configure}.
*
* The track's MediaFormat will come with {@link #KEY_WIDTH} and
* {@link #KEY_HEIGHT} keys, which describes the width and height
* of the image. If the image doesn't contain grid (i.e. none of
* {@link #KEY_TILE_WIDTH}, {@link #KEY_TILE_HEIGHT},
* {@link #KEY_GRID_ROWS}, {@link #KEY_GRID_COLUMNS} are present}), the
* track will contain a single sample of coded data for the entire image,
* and the image width and height should be used to set up the decoder.
*
* If the image does come with grid, each sample from the track will
* contain one tile in the grid, of which the size is described by
* {@link #KEY_TILE_WIDTH} and {@link #KEY_TILE_HEIGHT}. This size
* (instead of {@link #KEY_WIDTH} and {@link #KEY_HEIGHT}) should be
* used to set up the decoder. The track contains {@link #KEY_GRID_ROWS}
* by {@link #KEY_GRID_COLUMNS} samples in row-major, top-row first,
* left-to-right order. The output image should be reconstructed by
* first tiling the decoding results of the tiles in the correct order,
* then trimming (before rotation is applied) on the bottom and right
* side, if the tiled area is larger than the image width and height.
*/
public static final String MIMETYPE_IMAGE_ANDROID_HEIC = "image/vnd.android.heic";
/**
* MIME type for WebVTT subtitle data.
*/
public static final String MIMETYPE_TEXT_VTT = "text/vtt";
/**
* MIME type for SubRip (SRT) container.
*/
public static final String MIMETYPE_TEXT_SUBRIP = "application/x-subrip";
/**
* MIME type for CEA-608 closed caption data.
*/
public static final String MIMETYPE_TEXT_CEA_608 = "text/cea-608";
/**
* MIME type for CEA-708 closed caption data.
*/
public static final String MIMETYPE_TEXT_CEA_708 = "text/cea-708";
@UnsupportedAppUsage
private Map mMap;
/**
* A key describing the mime type of the MediaFormat.
* The associated value is a string.
*/
public static final String KEY_MIME = "mime";
/**
* A key describing the language of the content, using either ISO 639-1
* or 639-2/T codes. The associated value is a string.
*/
public static final String KEY_LANGUAGE = "language";
/**
* A key describing the sample rate of an audio format.
* The associated value is an integer
*/
public static final String KEY_SAMPLE_RATE = "sample-rate";
/**
* A key describing the number of channels in an audio format.
* The associated value is an integer
*/
public static final String KEY_CHANNEL_COUNT = "channel-count";
/**
* A key describing the width of the content in a video format.
* The associated value is an integer
*/
public static final String KEY_WIDTH = "width";
/**
* A key describing the height of the content in a video format.
* The associated value is an integer
*/
public static final String KEY_HEIGHT = "height";
/**
* A key describing the maximum expected width of the content in a video
* decoder format, in case there are resolution changes in the video content.
* The associated value is an integer
*/
public static final String KEY_MAX_WIDTH = "max-width";
/**
* A key describing the maximum expected height of the content in a video
* decoder format, in case there are resolution changes in the video content.
* The associated value is an integer
*/
public static final String KEY_MAX_HEIGHT = "max-height";
/** A key describing the maximum size in bytes of a buffer of data
* described by this MediaFormat.
* The associated value is an integer
*/
public static final String KEY_MAX_INPUT_SIZE = "max-input-size";
/**
* A key describing the average bitrate in bits/sec.
* The associated value is an integer
*/
public static final String KEY_BIT_RATE = "bitrate";
/**
* A key describing the max bitrate in bits/sec.
* This is usually over a one-second sliding window (e.g. over any window of one second).
* The associated value is an integer
* @hide
*/
public static final String KEY_MAX_BIT_RATE = "max-bitrate";
/**
* A key describing the color format of the content in a video format.
* Constants are declared in {@link android.media.MediaCodecInfo.CodecCapabilities}.
*/
public static final String KEY_COLOR_FORMAT = "color-format";
/**
* A key describing the frame rate of a video format in frames/sec.
* The associated value is normally an integer when the value is used by the platform,
* but video codecs also accept float configuration values.
* Specifically, {@link MediaExtractor#getTrackFormat MediaExtractor} provides an integer
* value corresponding to the frame rate information of the track if specified and non-zero.
* Otherwise, this key is not present. {@link MediaCodec#configure MediaCodec} accepts both
* float and integer values. This represents the desired operating frame rate if the
* {@link #KEY_OPERATING_RATE} is not present and {@link #KEY_PRIORITY} is {@code 0}
* (realtime). For video encoders this value corresponds to the intended frame rate,
* although encoders are expected
* to support variable frame rate based on {@link MediaCodec.BufferInfo#presentationTimeUs
* buffer timestamp}. This key is not used in the {@code MediaCodec}
* {@link MediaCodec#getInputFormat input}/{@link MediaCodec#getOutputFormat output} formats,
* nor by {@link MediaMuxer#addTrack MediaMuxer}.
*/
public static final String KEY_FRAME_RATE = "frame-rate";
/**
* A key describing the width (in pixels) of each tile of the content in a
* {@link #MIMETYPE_IMAGE_ANDROID_HEIC} track. The associated value is an integer.
*
* Refer to {@link #MIMETYPE_IMAGE_ANDROID_HEIC} on decoding instructions of such tracks.
*
* @see #KEY_TILE_HEIGHT
* @see #KEY_GRID_ROWS
* @see #KEY_GRID_COLUMNS
*/
public static final String KEY_TILE_WIDTH = "tile-width";
/**
* A key describing the height (in pixels) of each tile of the content in a
* {@link #MIMETYPE_IMAGE_ANDROID_HEIC} track. The associated value is an integer.
*
* Refer to {@link #MIMETYPE_IMAGE_ANDROID_HEIC} on decoding instructions of such tracks.
*
* @see #KEY_TILE_WIDTH
* @see #KEY_GRID_ROWS
* @see #KEY_GRID_COLUMNS
*/
public static final String KEY_TILE_HEIGHT = "tile-height";
/**
* A key describing the number of grid rows in the content in a
* {@link #MIMETYPE_IMAGE_ANDROID_HEIC} track. The associated value is an integer.
*
* Refer to {@link #MIMETYPE_IMAGE_ANDROID_HEIC} on decoding instructions of such tracks.
*
* @see #KEY_TILE_WIDTH
* @see #KEY_TILE_HEIGHT
* @see #KEY_GRID_COLUMNS
*/
public static final String KEY_GRID_ROWS = "grid-rows";
/**
* A key describing the number of grid columns in the content in a
* {@link #MIMETYPE_IMAGE_ANDROID_HEIC} track. The associated value is an integer.
*
* Refer to {@link #MIMETYPE_IMAGE_ANDROID_HEIC} on decoding instructions of such tracks.
*
* @see #KEY_TILE_WIDTH
* @see #KEY_TILE_HEIGHT
* @see #KEY_GRID_ROWS
*/
public static final String KEY_GRID_COLUMNS = "grid-cols";
/**
* A key describing the raw audio sample encoding/format.
*
* The associated value is an integer, using one of the
* {@link AudioFormat}.ENCODING_PCM_ values.
*
* This is an optional key for audio decoders and encoders specifying the
* desired raw audio sample format during {@link MediaCodec#configure
* MediaCodec.configure(…)} call. Use {@link MediaCodec#getInputFormat
* MediaCodec.getInput}/{@link MediaCodec#getOutputFormat OutputFormat(…)}
* to confirm the actual format. For the PCM decoder this key specifies both
* input and output sample encodings.
*
* This key is also used by {@link MediaExtractor} to specify the sample
* format of audio data, if it is specified.
*
* If this key is missing, the raw audio sample format is signed 16-bit short.
*/
public static final String KEY_PCM_ENCODING = "pcm-encoding";
/**
* A key describing the capture rate of a video format in frames/sec.
*
* When capture rate is different than the frame rate, it means that the
* video is acquired at a different rate than the playback, which produces
* slow motion or timelapse effect during playback. Application can use the
* value of this key to tell the relative speed ratio between capture and
* playback rates when the video was recorded.
*
*
* The associated value is an integer or a float.
*
*/
public static final String KEY_CAPTURE_RATE = "capture-rate";
/**
* A key describing the frequency of key frames expressed in seconds between key frames.
*
* This key is used by video encoders.
* A negative value means no key frames are requested after the first frame.
* A zero value means a stream containing all key frames is requested.
*
* Most video encoders will convert this value of the number of non-key-frames between
* key-frames, using the {@linkplain #KEY_FRAME_RATE frame rate} information; therefore,
* if the actual frame rate differs (e.g. input frames are dropped or the frame rate
* changes), the time interval between key frames will not be the
* configured value.
*
* The associated value is an integer (or float since
* {@link android.os.Build.VERSION_CODES#N_MR1}).
*/
public static final String KEY_I_FRAME_INTERVAL = "i-frame-interval";
/**
* An optional key describing the period of intra refresh in frames. This is an
* optional parameter that applies only to video encoders. If encoder supports it
* ({@link MediaCodecInfo.CodecCapabilities#FEATURE_IntraRefresh}), the whole
* frame is completely refreshed after the specified period. Also for each frame,
* a fix subset of macroblocks must be intra coded which leads to more constant bitrate
* than inserting a key frame. This key is recommended for video streaming applications
* as it provides low-delay and good error-resilience. This key is ignored if the
* video encoder does not support the intra refresh feature. Use the output format to
* verify that this feature was enabled.
* The associated value is an integer.
*/
public static final String KEY_INTRA_REFRESH_PERIOD = "intra-refresh-period";
/**
* An optional key describing whether encoders prepend headers to sync frames (e.g.
* SPS and PPS to IDR frames for H.264). This is an optional parameter that applies only
* to video encoders. A video encoder may not support this feature; the component will fail
* to configure in that case. For other components, this key is ignored.
*
* The value is an integer, with 1 indicating to prepend headers to every sync frames,
* or 0 otherwise. The default value is 0.
*/
public static final String KEY_PREPEND_HEADER_TO_SYNC_FRAMES = "prepend-sps-pps-to-idr-frames";
/**
* A key describing the temporal layering schema. This is an optional parameter
* that applies only to video encoders. Use {@link MediaCodec#getOutputFormat}
* after {@link MediaCodec#configure configure} to query if the encoder supports
* the desired schema. Supported values are {@code webrtc.vp8.N-layer},
* {@code android.generic.N}, {@code android.generic.N+M} and {@code none}, where
* {@code N} denotes the total number of non-bidirectional layers (which must be at least 1)
* and {@code M} denotes the total number of bidirectional layers (which must be non-negative).
*
{@code android.generic.*} schemas have been added in {@link
* android.os.Build.VERSION_CODES#N_MR1}.
*
* The encoder may support fewer temporal layers, in which case the output format
* will contain the configured schema. If the encoder does not support temporal
* layering, the output format will not have an entry with this key.
* The associated value is a string.
*/
public static final String KEY_TEMPORAL_LAYERING = "ts-schema";
/**
* A key describing the stride of the video bytebuffer layout.
* Stride (or row increment) is the difference between the index of a pixel
* and that of the pixel directly underneath. For YUV 420 formats, the
* stride corresponds to the Y plane; the stride of the U and V planes can
* be calculated based on the color format, though it is generally undefined
* and depends on the device and release.
* The associated value is an integer, representing number of bytes.
*/
public static final String KEY_STRIDE = "stride";
/**
* A key describing the plane height of a multi-planar (YUV) video bytebuffer layout.
* Slice height (or plane height/vertical stride) is the number of rows that must be skipped
* to get from the top of the Y plane to the top of the U plane in the bytebuffer. In essence
* the offset of the U plane is sliceHeight * stride. The height of the U/V planes
* can be calculated based on the color format, though it is generally undefined
* and depends on the device and release.
* The associated value is an integer, representing number of rows.
*/
public static final String KEY_SLICE_HEIGHT = "slice-height";
/**
* Applies only when configuring a video encoder in "surface-input" mode.
* The associated value is a long and gives the time in microseconds
* after which the frame previously submitted to the encoder will be
* repeated (once) if no new frame became available since.
*/
public static final String KEY_REPEAT_PREVIOUS_FRAME_AFTER
= "repeat-previous-frame-after";
/**
* Instruct the video encoder in "surface-input" mode to drop excessive
* frames from the source, so that the input frame rate to the encoder
* does not exceed the specified fps.
*
* The associated value is a float, representing the max frame rate to
* feed the encoder at.
*
*/
public static final String KEY_MAX_FPS_TO_ENCODER
= "max-fps-to-encoder";
/**
* Instruct the video encoder in "surface-input" mode to limit the gap of
* timestamp between any two adjacent frames fed to the encoder to the
* specified amount (in micro-second).
*
* The associated value is a long int. When positive, it represents the max
* timestamp gap between two adjacent frames fed to the encoder. When negative,
* the absolute value represents a fixed timestamp gap between any two adjacent
* frames fed to the encoder. Note that this will also apply even when the
* original timestamp goes backward in time. Under normal conditions, such frames
* would be dropped and not sent to the encoder.
*
* The output timestamp will be restored to the original timestamp and will
* not be affected.
*
* This is used in some special scenarios where input frames arrive sparingly
* but it's undesirable to allocate more bits to any single frame, or when it's
* important to ensure all frames are captured (rather than captured in the
* correct order).
*
*/
public static final String KEY_MAX_PTS_GAP_TO_ENCODER
= "max-pts-gap-to-encoder";
/**
* If specified when configuring a video encoder that's in "surface-input"
* mode, it will instruct the encoder to put the surface source in suspended
* state when it's connected. No video frames will be accepted until a resume
* operation (see {@link MediaCodec#PARAMETER_KEY_SUSPEND}), optionally with
* timestamp specified via {@link MediaCodec#PARAMETER_KEY_SUSPEND_TIME}, is
* received.
*
* The value is an integer, with 1 indicating to create with the surface
* source suspended, or 0 otherwise. The default value is 0.
*
* If this key is not set or set to 0, the surface source will accept buffers
* as soon as it's connected to the encoder (although they may not be encoded
* immediately). This key can be used when the client wants to prepare the
* encoder session in advance, but do not want to accept buffers immediately.
*/
public static final String KEY_CREATE_INPUT_SURFACE_SUSPENDED
= "create-input-buffers-suspended";
/**
* If specified when configuring a video decoder rendering to a surface,
* causes the decoder to output "blank", i.e. black frames to the surface
* when stopped to clear out any previously displayed contents.
* The associated value is an integer of value 1.
*/
public static final String KEY_PUSH_BLANK_BUFFERS_ON_STOP
= "push-blank-buffers-on-shutdown";
/**
* A key describing the duration (in microseconds) of the content.
* The associated value is a long.
*/
public static final String KEY_DURATION = "durationUs";
/**
* A key mapping to a value of 1 if the content is AAC audio and
* audio frames are prefixed with an ADTS header.
* The associated value is an integer (0 or 1).
* This key is only supported when _decoding_ content, it cannot
* be used to configure an encoder to emit ADTS output.
*/
public static final String KEY_IS_ADTS = "is-adts";
/**
* A key describing the channel composition of audio content. This mask
* is composed of bits drawn from channel mask definitions in {@link android.media.AudioFormat}.
* The associated value is an integer.
*/
public static final String KEY_CHANNEL_MASK = "channel-mask";
/**
* A key describing the AAC profile to be used (AAC audio formats only).
* Constants are declared in {@link android.media.MediaCodecInfo.CodecProfileLevel}.
*/
public static final String KEY_AAC_PROFILE = "aac-profile";
/**
* A key describing the AAC SBR mode to be used (AAC audio formats only).
* The associated value is an integer and can be set to following values:
*
* - 0 - no SBR should be applied
* - 1 - single rate SBR
* - 2 - double rate SBR
*
* Note: If this key is not defined the default SRB mode for the desired AAC profile will
* be used.
* This key is only used during encoding.
*/
public static final String KEY_AAC_SBR_MODE = "aac-sbr-mode";
/**
* A key describing the maximum number of channels that can be output by the AAC decoder.
* By default, the decoder will output the same number of channels as present in the encoded
* stream, if supported. Set this value to limit the number of output channels, and use
* the downmix information in the stream, if available.
*
Values larger than the number of channels in the content to decode are ignored.
*
This key is only used during decoding.
*/
public static final String KEY_AAC_MAX_OUTPUT_CHANNEL_COUNT = "aac-max-output-channel_count";
/**
* A key describing a gain to be applied so that the output loudness matches the
* Target Reference Level. This is typically used to normalize loudness across program items.
* The gain is derived as the difference between the Target Reference Level and the
* Program Reference Level. The latter can be given in the bitstream and indicates the actual
* loudness value of the program item.
*
The Target Reference Level controls loudness normalization for both MPEG-4 DRC and
* MPEG-D DRC.
*
The value is given as an integer value between
* 40 and 127, and is calculated as -4 * Target Reference Level in LKFS.
* Therefore, it represents the range of -10 to -31.75 LKFS.
*
The default value on mobile devices is 64 (-16 LKFS).
*
This key is only used during decoding.
*/
public static final String KEY_AAC_DRC_TARGET_REFERENCE_LEVEL = "aac-target-ref-level";
/**
* A key describing for selecting the DRC effect type for MPEG-D DRC.
* The supported values are defined in ISO/IEC 23003-4:2015 and are described as follows:
*
* Value Effect -1 Off 0 None 1 Late night 2 Noisy environment 3 Limited playback range 4 Low playback level 5 Dialog enhancement 6 General compression
* The value -1 (Off) disables DRC processing, while loudness normalization may still be
* active and dependent on KEY_AAC_DRC_TARGET_REFERENCE_LEVEL.
* The value 0 (None) automatically enables DRC processing if necessary to prevent signal
* clipping
* The value 6 (General compression) can be used for enabling MPEG-D DRC without particular
* DRC effect type request.
* The default DRC effect type is 3 ("Limited playback range") on mobile devices.
*
This key is only used during decoding.
*/
public static final String KEY_AAC_DRC_EFFECT_TYPE = "aac-drc-effect-type";
/**
* A key describing the target reference level that was assumed at the encoder for
* calculation of attenuation gains for clipping prevention.
*
If it is known, this information can be provided as an integer value between
* 0 and 127, which is calculated as -4 * Encoded Target Level in LKFS.
* If the Encoded Target Level is unknown, the value can be set to -1.
*
The default value is -1 (unknown).
*
The value is ignored when heavy compression is used (see
* {@link #KEY_AAC_DRC_HEAVY_COMPRESSION}).
*
This key is only used during decoding.
*/
public static final String KEY_AAC_ENCODED_TARGET_LEVEL = "aac-encoded-target-level";
/**
* A key describing the boost factor allowing to adapt the dynamics of the output to the
* actual listening requirements. This relies on DRC gain sequences that can be transmitted in
* the encoded bitstream to be able to reduce the dynamics of the output signal upon request.
* This factor enables the user to select how much of the gains are applied.
*
Positive gains (boost) and negative gains (attenuation, see
* {@link #KEY_AAC_DRC_ATTENUATION_FACTOR}) can be controlled separately for a better match
* to different use-cases.
*
Typically, attenuation gains are sent for loud signal segments, and boost gains are sent
* for soft signal segments. If the output is listened to in a noisy environment, for example,
* the boost factor is used to enable the positive gains, i.e. to amplify soft signal segments
* beyond the noise floor. But for listening late at night, the attenuation
* factor is used to enable the negative gains, to prevent loud signal from surprising
* the listener. In applications which generally need a low dynamic range, both the boost factor
* and the attenuation factor are used in order to enable all DRC gains.
*
In order to prevent clipping, it is also recommended to apply the attenuation gains
* in case of a downmix and/or loudness normalization to high target reference levels.
*
Both the boost and the attenuation factor parameters are given as integer values
* between 0 and 127, representing the range of the factor of 0 (i.e. don't apply)
* to 1 (i.e. fully apply boost/attenuation gains respectively).
*
The default value is 127 (fully apply boost DRC gains).
*
This key is only used during decoding.
*/
public static final String KEY_AAC_DRC_BOOST_FACTOR = "aac-drc-boost-level";
/**
* A key describing the attenuation factor allowing to adapt the dynamics of the output to the
* actual listening requirements.
* See {@link #KEY_AAC_DRC_BOOST_FACTOR} for a description of the role of this attenuation
* factor and the value range.
*
The default value is 127 (fully apply attenuation DRC gains).
*
This key is only used during decoding.
*/
public static final String KEY_AAC_DRC_ATTENUATION_FACTOR = "aac-drc-cut-level";
/**
* A key describing the selection of the heavy compression profile for DRC.
* Two separate DRC gain sequences can be transmitted in one bitstream: MPEG-4 DRC light
* compression, and DVB-specific heavy compression. When selecting the application of the heavy
* compression, one of the sequences is selected:
*
* - 0 enables light compression,
* - 1 enables heavy compression instead.
*
* Note that only light compression offers the features of scaling of DRC gains
* (see {@link #KEY_AAC_DRC_BOOST_FACTOR} and {@link #KEY_AAC_DRC_ATTENUATION_FACTOR} for the
* boost and attenuation factors, and frequency-selective (multiband) DRC.
* Light compression usually contains clipping prevention for stereo downmixing while heavy
* compression, if additionally provided in the bitstream, is usually stronger, and contains
* clipping prevention for stereo and mono downmixing.
* The default is 1 (heavy compression).
*
This key is only used during decoding.
*/
public static final String KEY_AAC_DRC_HEAVY_COMPRESSION = "aac-drc-heavy-compression";
/**
* A key describing the FLAC compression level to be used (FLAC audio format only).
* The associated value is an integer ranging from 0 (fastest, least compression)
* to 8 (slowest, most compression).
*/
public static final String KEY_FLAC_COMPRESSION_LEVEL = "flac-compression-level";
/**
* A key describing the encoding complexity.
* The associated value is an integer. These values are device and codec specific,
* but lower values generally result in faster and/or less power-hungry encoding.
*
* @see MediaCodecInfo.EncoderCapabilities#getComplexityRange()
*/
public static final String KEY_COMPLEXITY = "complexity";
/**
* A key describing the desired encoding quality.
* The associated value is an integer. This key is only supported for encoders
* that are configured in constant-quality mode. These values are device and
* codec specific, but lower values generally result in more efficient
* (smaller-sized) encoding.
*
* @see MediaCodecInfo.EncoderCapabilities#getQualityRange()
*/
public static final String KEY_QUALITY = "quality";
/**
* A key describing the desired codec priority.
*
* The associated value is an integer. Higher value means lower priority.
*
* Currently, only two levels are supported:
* 0: realtime priority - meaning that the codec shall support the given
* performance configuration (e.g. framerate) at realtime. This should
* only be used by media playback, capture, and possibly by realtime
* communication scenarios if best effort performance is not suitable.
* 1: non-realtime priority (best effort).
*
* This is a hint used at codec configuration and resource planning - to understand
* the realtime requirements of the application; however, due to the nature of
* media components, performance is not guaranteed.
*
*/
public static final String KEY_PRIORITY = "priority";
/**
* A key describing the desired operating frame rate for video or sample rate for audio
* that the codec will need to operate at.
*
* The associated value is an integer or a float representing frames-per-second or
* samples-per-second
*
* This is used for cases like high-speed/slow-motion video capture, where the video encoder
* format contains the target playback rate (e.g. 30fps), but the component must be able to
* handle the high operating capture rate (e.g. 240fps).
*
* This rate will be used by codec for resource planning and setting the operating points.
*
*/
public static final String KEY_OPERATING_RATE = "operating-rate";
/**
* A key describing the desired profile to be used by an encoder.
* The associated value is an integer.
* Constants are declared in {@link MediaCodecInfo.CodecProfileLevel}.
* This key is used as a hint, and is only supported for codecs
* that specify a profile. Note: Codecs are free to use all the available
* coding tools at the specified profile.
*
* @see MediaCodecInfo.CodecCapabilities#profileLevels
*/
public static final String KEY_PROFILE = "profile";
/**
* A key describing the desired profile to be used by an encoder.
* The associated value is an integer.
* Constants are declared in {@link MediaCodecInfo.CodecProfileLevel}.
* This key is used as a further hint when specifying a desired profile,
* and is only supported for codecs that specify a level.
*
* This key is ignored if the {@link #KEY_PROFILE profile} is not specified.
*
* @see MediaCodecInfo.CodecCapabilities#profileLevels
*/
public static final String KEY_LEVEL = "level";
/**
* An optional key describing the desired encoder latency in frames. This is an optional
* parameter that applies only to video encoders. If encoder supports it, it should ouput
* at least one output frame after being queued the specified number of frames. This key
* is ignored if the video encoder does not support the latency feature. Use the output
* format to verify that this feature was enabled and the actual value used by the encoder.
*
* If the key is not specified, the default latency will be implenmentation specific.
* The associated value is an integer.
*/
public static final String KEY_LATENCY = "latency";
/**
* An optional key describing the maximum number of non-display-order coded frames.
* This is an optional parameter that applies only to video encoders. Application should
* check the value for this key in the output format to see if codec will produce
* non-display-order coded frames. If encoder supports it, the output frames' order will be
* different from the display order and each frame's display order could be retrived from
* {@link MediaCodec.BufferInfo#presentationTimeUs}. Before API level 27, application may
* receive non-display-order coded frames even though the application did not request it.
* Note: Application should not rearrange the frames to display order before feeding them
* to {@link MediaMuxer#writeSampleData}.
*
* The default value is 0.
*/
public static final String KEY_OUTPUT_REORDER_DEPTH = "output-reorder-depth";
/**
* A key describing the desired clockwise rotation on an output surface.
* This key is only used when the codec is configured using an output surface.
* The associated value is an integer, representing degrees. Supported values
* are 0, 90, 180 or 270. This is an optional field; if not specified, rotation
* defaults to 0.
*
* @see MediaCodecInfo.CodecCapabilities#profileLevels
*/
public static final String KEY_ROTATION = "rotation-degrees";
/**
* A key describing the desired bitrate mode to be used by an encoder.
* Constants are declared in {@link MediaCodecInfo.CodecCapabilities}.
*
* @see MediaCodecInfo.EncoderCapabilities#isBitrateModeSupported(int)
*/
public static final String KEY_BITRATE_MODE = "bitrate-mode";
/**
* A key describing the audio session ID of the AudioTrack associated
* to a tunneled video codec.
* The associated value is an integer.
*
* @see MediaCodecInfo.CodecCapabilities#FEATURE_TunneledPlayback
*/
public static final String KEY_AUDIO_SESSION_ID = "audio-session-id";
/**
* A key for boolean AUTOSELECT behavior for the track. Tracks with AUTOSELECT=true
* are considered when automatically selecting a track without specific user
* choice, based on the current locale.
* This is currently only used for subtitle tracks, when the user selected
* 'Default' for the captioning locale.
* The associated value is an integer, where non-0 means TRUE. This is an optional
* field; if not specified, AUTOSELECT defaults to TRUE.
*/
public static final String KEY_IS_AUTOSELECT = "is-autoselect";
/**
* A key for boolean DEFAULT behavior for the track. The track with DEFAULT=true is
* selected in the absence of a specific user choice.
* This is currently used in two scenarios:
* 1) for subtitle tracks, when the user selected 'Default' for the captioning locale.
* 2) for a {@link #MIMETYPE_IMAGE_ANDROID_HEIC} track, indicating the image is the
* primary item in the file.
* The associated value is an integer, where non-0 means TRUE. This is an optional
* field; if not specified, DEFAULT is considered to be FALSE.
*/
public static final String KEY_IS_DEFAULT = "is-default";
/**
* A key for the FORCED field for subtitle tracks. True if it is a
* forced subtitle track. Forced subtitle tracks are essential for the
* content and are shown even when the user turns off Captions. They
* are used for example to translate foreign/alien dialogs or signs.
* The associated value is an integer, where non-0 means TRUE. This is an
* optional field; if not specified, FORCED defaults to FALSE.
*/
public static final String KEY_IS_FORCED_SUBTITLE = "is-forced-subtitle";
/**
* A key describing the number of haptic channels in an audio format.
* The associated value is an integer.
*/
public static final String KEY_HAPTIC_CHANNEL_COUNT = "haptic-channel-count";
/** @hide */
public static final String KEY_IS_TIMED_TEXT = "is-timed-text";
// The following color aspect values must be in sync with the ones in HardwareAPI.h.
/**
* An optional key describing the color primaries, white point and
* luminance factors for video content.
*
* The associated value is an integer: 0 if unspecified, or one of the
* COLOR_STANDARD_ values.
*/
public static final String KEY_COLOR_STANDARD = "color-standard";
/** BT.709 color chromacity coordinates with KR = 0.2126, KB = 0.0722. */
public static final int COLOR_STANDARD_BT709 = 1;
/** BT.601 625 color chromacity coordinates with KR = 0.299, KB = 0.114. */
public static final int COLOR_STANDARD_BT601_PAL = 2;
/** BT.601 525 color chromacity coordinates with KR = 0.299, KB = 0.114. */
public static final int COLOR_STANDARD_BT601_NTSC = 4;
/** BT.2020 color chromacity coordinates with KR = 0.2627, KB = 0.0593. */
public static final int COLOR_STANDARD_BT2020 = 6;
/** @hide */
@IntDef({
COLOR_STANDARD_BT709,
COLOR_STANDARD_BT601_PAL,
COLOR_STANDARD_BT601_NTSC,
COLOR_STANDARD_BT2020,
})
@Retention(RetentionPolicy.SOURCE)
public @interface ColorStandard {}
/**
* An optional key describing the opto-electronic transfer function used
* for the video content.
*
* The associated value is an integer: 0 if unspecified, or one of the
* COLOR_TRANSFER_ values.
*/
public static final String KEY_COLOR_TRANSFER = "color-transfer";
/** Linear transfer characteristic curve. */
public static final int COLOR_TRANSFER_LINEAR = 1;
/** SMPTE 170M transfer characteristic curve used by BT.601/BT.709/BT.2020. This is the curve
* used by most non-HDR video content. */
public static final int COLOR_TRANSFER_SDR_VIDEO = 3;
/** SMPTE ST 2084 transfer function. This is used by some HDR video content. */
public static final int COLOR_TRANSFER_ST2084 = 6;
/** ARIB STD-B67 hybrid-log-gamma transfer function. This is used by some HDR video content. */
public static final int COLOR_TRANSFER_HLG = 7;
/** @hide */
@IntDef({
COLOR_TRANSFER_LINEAR,
COLOR_TRANSFER_SDR_VIDEO,
COLOR_TRANSFER_ST2084,
COLOR_TRANSFER_HLG,
})
@Retention(RetentionPolicy.SOURCE)
public @interface ColorTransfer {}
/**
* An optional key describing the range of the component values of the video content.
*
* The associated value is an integer: 0 if unspecified, or one of the
* COLOR_RANGE_ values.
*/
public static final String KEY_COLOR_RANGE = "color-range";
/** Limited range. Y component values range from 16 to 235 for 8-bit content.
* Cr, Cy values range from 16 to 240 for 8-bit content.
* This is the default for video content. */
public static final int COLOR_RANGE_LIMITED = 2;
/** Full range. Y, Cr and Cb component values range from 0 to 255 for 8-bit content. */
public static final int COLOR_RANGE_FULL = 1;
/** @hide */
@IntDef({
COLOR_RANGE_LIMITED,
COLOR_RANGE_FULL,
})
@Retention(RetentionPolicy.SOURCE)
public @interface ColorRange {}
/**
* An optional key describing the static metadata of HDR (high-dynamic-range) video content.
*
* The associated value is a ByteBuffer. This buffer contains the raw contents of the
* Static Metadata Descriptor (including the descriptor ID) of an HDMI Dynamic Range and
* Mastering InfoFrame as defined by CTA-861.3. This key must be provided to video decoders
* for HDR video content unless this information is contained in the bitstream and the video
* decoder supports an HDR-capable profile. This key must be provided to video encoders for
* HDR video content.
*/
public static final String KEY_HDR_STATIC_INFO = "hdr-static-info";
/**
* An optional key describing the HDR10+ metadata of the video content.
*
* The associated value is a ByteBuffer containing HDR10+ metadata conforming to the
* user_data_registered_itu_t_t35() syntax of SEI message for ST 2094-40. This key will
* be present on:
*
* - The formats of output buffers of a decoder configured for HDR10+ profiles (such as
* {@link MediaCodecInfo.CodecProfileLevel#VP9Profile2HDR10Plus}, {@link
* MediaCodecInfo.CodecProfileLevel#VP9Profile3HDR10Plus} or {@link
* MediaCodecInfo.CodecProfileLevel#HEVCProfileMain10HDR10Plus}), or
*
* - The formats of output buffers of an encoder configured for an HDR10+ profiles that
* uses out-of-band metadata (such as {@link
* MediaCodecInfo.CodecProfileLevel#VP9Profile2HDR10Plus} or {@link
* MediaCodecInfo.CodecProfileLevel#VP9Profile3HDR10Plus}).
*
* @see MediaCodec#PARAMETER_KEY_HDR10_PLUS_INFO
*/
public static final String KEY_HDR10_PLUS_INFO = "hdr10-plus-info";
/**
* A key describing a unique ID for the content of a media track.
*
*
This key is used by {@link MediaExtractor}. Some extractors provide multiple encodings
* of the same track (e.g. float audio tracks for FLAC and WAV may be expressed as two
* tracks via MediaExtractor: a normal PCM track for backward compatibility, and a float PCM
* track for added fidelity. Similarly, Dolby Vision extractor may provide a baseline SDR
* version of a DV track.) This key can be used to identify which MediaExtractor tracks refer
* to the same underlying content.
*
*
* The associated value is an integer.
*/
public static final String KEY_TRACK_ID = "track-id";
/**
* A key describing the system id of the conditional access system used to scramble
* a media track.
*
* This key is set by {@link MediaExtractor} if the track is scrambled with a conditional
* access system, regardless of the presence of a valid {@link MediaCas} object.
*
* The associated value is an integer.
* @hide
*/
public static final String KEY_CA_SYSTEM_ID = "ca-system-id";
/**
* A key describing the {@link MediaCas.Session} object associated with a media track.
*
* This key is set by {@link MediaExtractor} if the track is scrambled with a conditional
* access system, after it receives a valid {@link MediaCas} object.
*
* The associated value is a ByteBuffer.
* @hide
*/
public static final String KEY_CA_SESSION_ID = "ca-session-id";
/**
* A key describing the private data in the CA_descriptor associated with a media track.
*
* This key is set by {@link MediaExtractor} if the track is scrambled with a conditional
* access system, before it receives a valid {@link MediaCas} object.
*
* The associated value is a ByteBuffer.
* @hide
*/
public static final String KEY_CA_PRIVATE_DATA = "ca-private-data";
/**
* A key describing the maximum number of B frames between I or P frames,
* to be used by a video encoder.
* The associated value is an integer. The default value is 0, which means
* that no B frames are allowed. Note that non-zero value does not guarantee
* B frames; it's up to the encoder to decide.
*/
public static final String KEY_MAX_B_FRAMES = "max-bframes";
/* package private */ MediaFormat(@NonNull Map map) {
mMap = map;
}
/**
* Creates an empty MediaFormat
*/
public MediaFormat() {
mMap = new HashMap();
}
@UnsupportedAppUsage
/* package private */ Map getMap() {
return mMap;
}
/**
* Returns true iff a key of the given name exists in the format.
*/
public final boolean containsKey(@NonNull String name) {
return mMap.containsKey(name);
}
/**
* Returns true iff a feature of the given name exists in the format.
*/
public final boolean containsFeature(@NonNull String name) {
return mMap.containsKey(KEY_FEATURE_ + name);
}
public static final int TYPE_NULL = 0;
public static final int TYPE_INTEGER = 1;
public static final int TYPE_LONG = 2;
public static final int TYPE_FLOAT = 3;
public static final int TYPE_STRING = 4;
public static final int TYPE_BYTE_BUFFER = 5;
/** @hide */
@IntDef({
TYPE_NULL,
TYPE_INTEGER,
TYPE_LONG,
TYPE_FLOAT,
TYPE_STRING,
TYPE_BYTE_BUFFER
})
@Retention(RetentionPolicy.SOURCE)
public @interface Type {}
/**
* Returns the value type for a key. If the key does not exist, it returns TYPE_NULL.
*/
public final @Type int getValueTypeForKey(@NonNull String name) {
Object value = mMap.get(name);
if (value == null) {
return TYPE_NULL;
} else if (value instanceof Integer) {
return TYPE_INTEGER;
} else if (value instanceof Long) {
return TYPE_LONG;
} else if (value instanceof Float) {
return TYPE_FLOAT;
} else if (value instanceof String) {
return TYPE_STRING;
} else if (value instanceof ByteBuffer) {
return TYPE_BYTE_BUFFER;
}
throw new RuntimeException("invalid value for key");
}
/**
* A key prefix used together with a {@link MediaCodecInfo.CodecCapabilities}
* feature name describing a required or optional feature for a codec capabilities
* query.
* The associated value is an integer, where non-0 value means the feature is
* requested to be present, while 0 value means the feature is requested to be not
* present.
* @see MediaCodecList#findDecoderForFormat
* @see MediaCodecList#findEncoderForFormat
* @see MediaCodecInfo.CodecCapabilities#isFormatSupported
*
* @hide
*/
public static final String KEY_FEATURE_ = "feature-";
/**
* Returns the value of a numeric key. This is provided as a convenience method for keys
* that may take multiple numeric types, such as {@link #KEY_FRAME_RATE}, or {@link
* #KEY_I_FRAME_INTERVAL}.
*
* @return null if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is ByteBuffer or String
*/
public final @Nullable Number getNumber(@NonNull String name) {
return ((Number)mMap.get(name));
}
/**
* Returns the value of a numeric key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is ByteBuffer or String
*/
public final @NonNull Number getNumber(@NonNull String name, @NonNull Number defaultValue) {
Number ret = getNumber(name);
return ret == null ? defaultValue : ret;
}
/**
* Returns the value of an integer key.
*
* @throws NullPointerException if the key does not exist or the stored value for the key is
* null
* @throws ClassCastException if the stored value for the key is long, float, ByteBuffer or
* String
*/
public final int getInteger(@NonNull String name) {
return ((Integer)mMap.get(name)).intValue();
}
/**
* Returns the value of an integer key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is long, float, ByteBuffer or
* String
*/
public final int getInteger(@NonNull String name, int defaultValue) {
try {
return getInteger(name);
} catch (NullPointerException e) {
/* no such field or field is null */
return defaultValue;
}
}
/**
* Returns the value of a long key.
*
* @throws NullPointerException if the key does not exist or the stored value for the key is
* null
* @throws ClassCastException if the stored value for the key is int, float, ByteBuffer or
* String
*/
public final long getLong(@NonNull String name) {
return ((Long)mMap.get(name)).longValue();
}
/**
* Returns the value of an long key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, float, ByteBuffer or
* String
*/
public final long getLong(@NonNull String name, long defaultValue) {
try {
return getLong(name);
} catch (NullPointerException e) {
/* no such field or field is null */
return defaultValue;
}
}
/**
* Returns the value of a float key.
*
* @throws NullPointerException if the key does not exist or the stored value for the key is
* null
* @throws ClassCastException if the stored value for the key is int, long, ByteBuffer or
* String
*/
public final float getFloat(@NonNull String name) {
return ((Float)mMap.get(name)).floatValue();
}
/**
* Returns the value of an float key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, long, ByteBuffer or
* String
*/
public final float getFloat(@NonNull String name, float defaultValue) {
try {
return getFloat(name);
} catch (NullPointerException e) {
/* no such field or field is null */
return defaultValue;
}
}
/**
* Returns the value of a string key.
*
* @return null if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, long, float or ByteBuffer
*/
public final @Nullable String getString(@NonNull String name) {
return (String)mMap.get(name);
}
/**
* Returns the value of an string key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, long, float or ByteBuffer
*/
public final @NonNull String getString(@NonNull String name, @NonNull String defaultValue) {
String ret = getString(name);
return ret == null ? defaultValue : ret;
}
/**
* Returns the value of a ByteBuffer key.
*
* @return null if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, long, float or String
*/
public final @Nullable ByteBuffer getByteBuffer(@NonNull String name) {
return (ByteBuffer)mMap.get(name);
}
/**
* Returns the value of a ByteBuffer key, or the default value if the key is missing.
*
* @return defaultValue if the key does not exist or the stored value for the key is null
* @throws ClassCastException if the stored value for the key is int, long, float or String
*/
public final @NonNull ByteBuffer getByteBuffer(
@NonNull String name, @NonNull ByteBuffer defaultValue) {
ByteBuffer ret = getByteBuffer(name);
return ret == null ? defaultValue : ret;
}
/**
* Returns whether a feature is to be enabled ({@code true}) or disabled
* ({@code false}).
*
* @param feature the name of a {@link MediaCodecInfo.CodecCapabilities} feature.
*
* @throws IllegalArgumentException if the feature was neither set to be enabled
* nor to be disabled.
*/
public boolean getFeatureEnabled(@NonNull String feature) {
Integer enabled = (Integer)mMap.get(KEY_FEATURE_ + feature);
if (enabled == null) {
throw new IllegalArgumentException("feature is not specified");
}
return enabled != 0;
}
/**
* Sets the value of an integer key.
*/
public final void setInteger(@NonNull String name, int value) {
mMap.put(name, Integer.valueOf(value));
}
/**
* Sets the value of a long key.
*/
public final void setLong(@NonNull String name, long value) {
mMap.put(name, Long.valueOf(value));
}
/**
* Sets the value of a float key.
*/
public final void setFloat(@NonNull String name, float value) {
mMap.put(name, new Float(value));
}
/**
* Sets the value of a string key.
*
* If value is {@code null}, it sets a null value that behaves similarly to a missing key.
* This could be used prior to API level {@link android os.Build.VERSION_CODES#Q} to effectively
* remove a key.
*/
public final void setString(@NonNull String name, @Nullable String value) {
mMap.put(name, value);
}
/**
* Sets the value of a ByteBuffer key.
*
* If value is {@code null}, it sets a null value that behaves similarly to a missing key.
* This could be used prior to API level {@link android os.Build.VERSION_CODES#Q} to effectively
* remove a key.
*/
public final void setByteBuffer(@NonNull String name, @Nullable ByteBuffer bytes) {
mMap.put(name, bytes);
}
/**
* Removes a value of a given key if present. Has no effect if the key is not present.
*/
public final void removeKey(@NonNull String name) {
// exclude feature mappings
if (!name.startsWith(KEY_FEATURE_)) {
mMap.remove(name);
}
}
/**
* Removes a given feature setting if present. Has no effect if the feature setting is not
* present.
*/
public final void removeFeature(@NonNull String name) {
mMap.remove(KEY_FEATURE_ + name);
}
/**
* A Partial set view for a portion of the keys in a MediaFormat object.
*
* This class is needed as we want to return a portion of the actual format keys in getKeys()
* and another portion of the keys in getFeatures(), and still allow the view properties.
*/
private abstract class FilteredMappedKeySet extends AbstractSet {
private Set mKeys;
// Returns true if this set should include this key
abstract protected boolean keepKey(String key);
// Maps a key from the underlying key set into its new value in this key set
abstract protected String mapKeyToItem(String key);
// Maps a key from this key set into its original value in the underlying key set
abstract protected String mapItemToKey(String item);
public FilteredMappedKeySet() {
mKeys = mMap.keySet();
}
// speed up contains and remove from abstract implementation (that would iterate
// over each element)
@Override
public boolean contains(Object o) {
if (o instanceof String) {
String key = mapItemToKey((String)o);
return keepKey(key) && mKeys.contains(key);
}
return false;
}
@Override
public boolean remove(Object o) {
if (o instanceof String) {
String key = mapItemToKey((String)o);
if (keepKey(key) && mKeys.remove(key)) {
mMap.remove(key);
return true;
}
}
return false;
}
private class KeyIterator implements Iterator {
Iterator mIterator;
String mLast;
public KeyIterator() {
// We must create a copy of the filtered stream, as remove operation has to modify
// the underlying data structure (mMap), so the iterator's operation is undefined.
// Use a list as it is likely less memory consuming than the other alternative: set.
mIterator =
mKeys.stream().filter(k -> keepKey(k)).collect(Collectors.toList()).iterator();
}
@Override
public boolean hasNext() {
return mIterator.hasNext();
}
@Override
public String next() {
mLast = mIterator.next();
return mapKeyToItem(mLast);
}
@Override
public void remove() {
mIterator.remove();
mMap.remove(mLast);
}
}
@Override
public Iterator iterator() {
return new KeyIterator();
}
@Override
public int size() {
return (int)mKeys.stream().filter(k -> keepKey(k)).count();
}
}
/**
* A Partial set view for a portion of the keys in a MediaFormat object for keys that
* don't start with a prefix, such as "feature-"
*/
private class UnprefixedKeySet extends FilteredMappedKeySet {
private String mPrefix;
public UnprefixedKeySet(String prefix) {
super();
mPrefix = prefix;
}
protected boolean keepKey(String key) {
return !key.startsWith(mPrefix);
}
protected String mapKeyToItem(String key) {
return key;
}
protected String mapItemToKey(String item) {
return item;
}
}
/**
* A Partial set view for a portion of the keys in a MediaFormat object for keys that
* start with a prefix, such as "feature-", with the prefix removed
*/
private class PrefixedKeySetWithPrefixRemoved extends FilteredMappedKeySet {
private String mPrefix;
private int mPrefixLength;
public PrefixedKeySetWithPrefixRemoved(String prefix) {
super();
mPrefix = prefix;
mPrefixLength = prefix.length();
}
protected boolean keepKey(String key) {
return key.startsWith(mPrefix);
}
protected String mapKeyToItem(String key) {
return key.substring(mPrefixLength);
}
protected String mapItemToKey(String item) {
return mPrefix + item;
}
}
/**
* Returns a {@link java.util.Set Set} view of the keys contained in this MediaFormat.
*
* The set is backed by the MediaFormat object, so changes to the format are reflected in the
* set, and vice-versa. If the format is modified while an iteration over the set is in progress
* (except through the iterator's own remove operation), the results of the iteration are
* undefined. The set supports element removal, which removes the corresponding mapping from the
* format, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations.
* It does not support the add or addAll operations.
*/
public final @NonNull java.util.Set getKeys() {
return new UnprefixedKeySet(KEY_FEATURE_);
}
/**
* Returns a {@link java.util.Set Set} view of the features contained in this MediaFormat.
*
* The set is backed by the MediaFormat object, so changes to the format are reflected in the
* set, and vice-versa. If the format is modified while an iteration over the set is in progress
* (except through the iterator's own remove operation), the results of the iteration are
* undefined. The set supports element removal, which removes the corresponding mapping from the
* format, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations.
* It does not support the add or addAll operations.
*/
public final @NonNull java.util.Set getFeatures() {
return new PrefixedKeySetWithPrefixRemoved(KEY_FEATURE_);
}
/**
* Create a copy of a media format object.
*/
public MediaFormat(@NonNull MediaFormat other) {
this();
mMap.putAll(other.mMap);
}
/**
* Sets whether a feature is to be enabled ({@code true}) or disabled
* ({@code false}).
*
* If {@code enabled} is {@code true}, the feature is requested to be present.
* Otherwise, the feature is requested to be not present.
*
* @param feature the name of a {@link MediaCodecInfo.CodecCapabilities} feature.
*
* @see MediaCodecList#findDecoderForFormat
* @see MediaCodecList#findEncoderForFormat
* @see MediaCodecInfo.CodecCapabilities#isFormatSupported
*/
public void setFeatureEnabled(@NonNull String feature, boolean enabled) {
setInteger(KEY_FEATURE_ + feature, enabled ? 1 : 0);
}
/**
* Creates a minimal audio format.
* @param mime The mime type of the content.
* @param sampleRate The sampling rate of the content.
* @param channelCount The number of audio channels in the content.
*/
public static final @NonNull MediaFormat createAudioFormat(
@NonNull String mime,
int sampleRate,
int channelCount) {
MediaFormat format = new MediaFormat();
format.setString(KEY_MIME, mime);
format.setInteger(KEY_SAMPLE_RATE, sampleRate);
format.setInteger(KEY_CHANNEL_COUNT, channelCount);
return format;
}
/**
* Creates a minimal subtitle format.
* @param mime The mime type of the content.
* @param language The language of the content, using either ISO 639-1 or 639-2/T
* codes. Specify null or "und" if language information is only included
* in the content. (This will also work if there are multiple language
* tracks in the content.)
*/
public static final @NonNull MediaFormat createSubtitleFormat(
@NonNull String mime,
String language) {
MediaFormat format = new MediaFormat();
format.setString(KEY_MIME, mime);
format.setString(KEY_LANGUAGE, language);
return format;
}
/**
* Creates a minimal video format.
* @param mime The mime type of the content.
* @param width The width of the content (in pixels)
* @param height The height of the content (in pixels)
*/
public static final @NonNull MediaFormat createVideoFormat(
@NonNull String mime,
int width,
int height) {
MediaFormat format = new MediaFormat();
format.setString(KEY_MIME, mime);
format.setInteger(KEY_WIDTH, width);
format.setInteger(KEY_HEIGHT, height);
return format;
}
@Override
public @NonNull String toString() {
return mMap.toString();
}
}