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Merge "media: document format keys for MediaExtractor/CodecCapabilities" into nyc-dev

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This commit is contained in:
Lajos Molnar
2016-06-28 22:19:29 +00:00
committed by Android (Google) Code Review
parent 29ea814354 43a2398258
commit 556e012979
3 changed files with 178 additions and 0 deletions
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66
media/java/android/media/MediaCodecInfo.java
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@@ -541,6 +541,72 @@ public final class MediaCodecInfo {
* frame rate}. Use
* <code class=prettyprint>format.setString(MediaFormat.KEY_FRAME_RATE, null)</code>
* to clear any existing frame rate setting in the format.
* <p>
*
* The following table summarizes the format keys considered by this method.
*
* <table style="width: 0%">
* <thead>
* <tr>
* <th rowspan=3>OS Version(s)</th>
* <td colspan=3>{@code MediaFormat} keys considered for</th>
* </tr><tr>
* <th>Audio Codecs</th>
* <th>Video Codecs</th>
* <th>Encoders</th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <td>{@link android.os.Build.VERSION_CODES#LOLLIPOP}</th>
* <td rowspan=3>{@link MediaFormat#KEY_MIME}<sup>*</sup>,<br>
* {@link MediaFormat#KEY_SAMPLE_RATE},<br>
* {@link MediaFormat#KEY_CHANNEL_COUNT},</td>
* <td>{@link MediaFormat#KEY_MIME}<sup>*</sup>,<br>
* {@link CodecCapabilities#FEATURE_AdaptivePlayback}<sup>D</sup>,<br>
* {@link CodecCapabilities#FEATURE_SecurePlayback}<sup>D</sup>,<br>
* {@link CodecCapabilities#FEATURE_TunneledPlayback}<sup>D</sup>,<br>
* {@link MediaFormat#KEY_WIDTH},<br>
* {@link MediaFormat#KEY_HEIGHT},<br>
* <strong>no</strong> {@code KEY_FRAME_RATE}</td>
* <td rowspan=4>{@link MediaFormat#KEY_BITRATE_MODE},<br>
* {@link MediaFormat#KEY_PROFILE}
* (and/or {@link MediaFormat#KEY_AAC_PROFILE}<sup>~</sup>),<br>
* <!-- {link MediaFormat#KEY_QUALITY},<br> -->
* {@link MediaFormat#KEY_COMPLEXITY}
* (and/or {@link MediaFormat#KEY_FLAC_COMPRESSION_LEVEL}<sup>~</sup>)</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#LOLLIPOP_MR1}</th>
* <td rowspan=2>as above, plus<br>
* {@link MediaFormat#KEY_FRAME_RATE}</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#M}</th>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#N}</th>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_PROFILE},<br>
* <!-- {link MediaFormat#KEY_MAX_BIT_RATE},<br> -->
* {@link MediaFormat#KEY_BIT_RATE}</td>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_PROFILE},<br>
* {@link MediaFormat#KEY_LEVEL}<sup>+</sup>,<br>
* <!-- {link MediaFormat#KEY_MAX_BIT_RATE},<br> -->
* {@link MediaFormat#KEY_BIT_RATE},<br>
* {@link CodecCapabilities#FEATURE_IntraRefresh}<sup>E</sup></td>
* </tr>
* <tr>
* <td colspan=4>
* <p class=note><strong>Notes:</strong><br>
* *: must be specified; otherwise, method returns {@code false}.<br>
* +: method does not verify that the format parameters are supported
* by the specified level.<br>
* D: decoders only<br>
* E: encoders only<br>
* ~: if both keys are provided values must match
* </td>
* </tr>
* </tbody>
* </table>
*
* @param format media format with optional feature directives.
* @throws IllegalArgumentException if format is not a valid media format.

6
media/java/android/media/MediaCodecList.java
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@@ -201,6 +201,9 @@ final public class MediaCodecList {
* <code class=prettyprint>format.setString(MediaFormat.KEY_FRAME_RATE, null)</code>
* to clear any existing frame rate setting in the format.
*
* @see MediaCodecList.CodecCapabilities.isFormatSupported for format keys
* considered per android versions when evaluating suitable codecs.
*
* @param format A decoder media format with optional feature directives.
* @throws IllegalArgumentException if format is not a valid media format.
* @throws NullPointerException if format is null.
@@ -222,6 +225,9 @@ final public class MediaCodecList {
* <code class=prettyprint>format.setString(MediaFormat.KEY_FRAME_RATE, null)</code>
* to clear any existing frame rate setting in the format.
*
* @see MediaCodecList.CodecCapabilities.isFormatSupported for format keys
* considered per android versions when evaluating suitable codecs.
*
* @param format An encoder media format with optional feature directives.
* @throws IllegalArgumentException if format is not a valid media format.
* @throws NullPointerException if format is null.

106
media/java/android/media/MediaExtractor.java
View File

@@ -333,7 +333,113 @@ final public class MediaExtractor {
/**
* Get the track format at the specified index.
*
* More detail on the representation can be found at {@link android.media.MediaCodec}
* <p>
* The following table summarizes support for format keys across android releases:
*
* <table style="width: 0%">
* <thead>
* <tr>
* <th rowspan=2>OS Version(s)</th>
* <td colspan=3>{@code MediaFormat} keys used for</th>
* </tr><tr>
* <th>All Tracks</th>
* <th>Audio Tracks</th>
* <th>Video Tracks</th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <td>{@link android.os.Build.VERSION_CODES#JELLY_BEAN}</td>
* <td rowspan=8>{@link MediaFormat#KEY_MIME},<br>
* {@link MediaFormat#KEY_DURATION},<br>
* {@link MediaFormat#KEY_MAX_INPUT_SIZE}</td>
* <td rowspan=5>{@link MediaFormat#KEY_SAMPLE_RATE},<br>
* {@link MediaFormat#KEY_CHANNEL_COUNT},<br>
* {@link MediaFormat#KEY_CHANNEL_MASK},<br>
* gapless playback information<sup>.mp3, .mp4</sup>,<br>
* {@link MediaFormat#KEY_IS_ADTS}<sup>AAC if streaming</sup>,<br>
* codec-specific data<sup>AAC, Vorbis</sup></td>
* <td rowspan=2>{@link MediaFormat#KEY_WIDTH},<br>
* {@link MediaFormat#KEY_HEIGHT},<br>
* codec-specific data<sup>AVC, MPEG4</sup></td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}</td>
* <td rowspan=3>as above, plus<br>
* Pixel aspect ratio information<sup>AVC, *</sup></td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#KITKAT}</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#KITKAT_WATCH}</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#LOLLIPOP}</td>
* <td rowspan=2>as above, plus<br>
* {@link MediaFormat#KEY_BIT_RATE}<sup>AAC</sup>,<br>
* codec-specific data<sup>Opus</sup></td>
* <td rowspan=2>as above, plus<br>
* {@link MediaFormat#KEY_ROTATION}<sup>.mp4</sup>,<br>
* {@link MediaFormat#KEY_BIT_RATE}<sup>MPEG4</sup>,<br>
* codec-specific data<sup>HEVC</sup></td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#LOLLIPOP_MR1}</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#M}</td>
* <td>as above, plus<br>
* gapless playback information<sup>Opus</sup></td>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_FRAME_RATE} (integer)</td>
* </tr><tr>
* <td>{@link android.os.Build.VERSION_CODES#N}</td>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_TRACK_ID},<br>
* <!-- {link MediaFormat#KEY_MAX_BIT_RATE}<sup>#, .mp4</sup>,<br> -->
* {@link MediaFormat#KEY_BIT_RATE}<sup>#, .mp4</sup></td>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_PCM_ENCODING},<br>
* {@link MediaFormat#KEY_PROFILE}<sup>AAC</sup></td>
* <td>as above, plus<br>
* {@link MediaFormat#KEY_HDR_STATIC_INFO}<sup>#, .webm</sup>,<br>
* {@link MediaFormat#KEY_COLOR_STANDARD}<sup>#</sup>,<br>
* {@link MediaFormat#KEY_COLOR_TRANSFER}<sup>#</sup>,<br>
* {@link MediaFormat#KEY_COLOR_RANGE}<sup>#</sup>,<br>
* {@link MediaFormat#KEY_PROFILE}<sup>MPEG2, H.263, MPEG4, AVC, HEVC, VP9</sup>,<br>
* {@link MediaFormat#KEY_LEVEL}<sup>H.263, MPEG4, AVC, HEVC, VP9</sup>,<br>
* codec-specific data<sup>VP9</sup></td>
* </tr>
* <tr>
* <td colspan=4>
* <p class=note><strong>Notes:</strong><br>
* #: container-specified value only.<br>
* .mp4, .webm&hellip;: for listed containers<br>
* MPEG4, AAC&hellip;: for listed codecs
* </td>
* </tr><tr>
* <td colspan=4>
* <p class=note>Note that that level information contained in the container many times
* does not match the level of the actual bitstream. You may want to clear the level using
* {@code MediaFormat.setString(KEY_LEVEL, null)} before using the track format to find a
* decoder that can play back a particular track.
* </td>
* </tr><tr>
* <td colspan=4>
* <p class=note><strong>*Pixel (sample) aspect ratio</strong> is returned in the following
* keys. The display width can be calculated for example as:
* <p align=center>
* display-width = display-height * crop-width / crop-height * sar-width / sar-height
* </td>
* </tr><tr>
* <th>Format Key</th><th>Value Type</th><th colspan=2>Description</th>
* </tr><tr>
* <td>{@code "sar-width"}</td><td>Integer</td><td colspan=2>Pixel aspect ratio width</td>
* </tr><tr>
* <td>{@code "sar-height"}</td><td>Integer</td><td colspan=2>Pixel aspect ratio height</td>
* </tr>
* </tbody>
* </table>
*
*/
@NonNull
public MediaFormat getTrackFormat(int index) {