diff options
Diffstat (limited to 'media/ffmpeg')
| -rw-r--r-- | media/ffmpeg/ffmpeg_common.cc | 45 | ||||
| -rw-r--r-- | media/ffmpeg/ffmpeg_common.h | 7 |
2 files changed, 52 insertions, 0 deletions
diff --git a/media/ffmpeg/ffmpeg_common.cc b/media/ffmpeg/ffmpeg_common.cc index 9f5eaeb..dedc40c 100644 --- a/media/ffmpeg/ffmpeg_common.cc +++ b/media/ffmpeg/ffmpeg_common.cc @@ -61,6 +61,51 @@ CodecID VideoCodecToCodecID(VideoCodec video_codec) { return CODEC_ID_NONE; } +ChannelLayout ChannelLayoutToChromeChannelLayout(int64_t layout, + int channels) { + switch (layout) { + case CH_LAYOUT_MONO: + return CHANNEL_LAYOUT_MONO; + case CH_LAYOUT_STEREO: + return CHANNEL_LAYOUT_STEREO; + case CH_LAYOUT_2_1: + return CHANNEL_LAYOUT_2_1; + case CH_LAYOUT_SURROUND: + return CHANNEL_LAYOUT_SURROUND; + case CH_LAYOUT_4POINT0: + return CHANNEL_LAYOUT_4POINT0; + case CH_LAYOUT_2_2: + return CHANNEL_LAYOUT_2_2; + case CH_LAYOUT_QUAD: + return CHANNEL_LAYOUT_QUAD; + case CH_LAYOUT_5POINT0: + return CHANNEL_LAYOUT_5POINT0; + case CH_LAYOUT_5POINT1: + return CHANNEL_LAYOUT_5POINT1; + case CH_LAYOUT_5POINT0_BACK: + return CHANNEL_LAYOUT_5POINT0_BACK; + case CH_LAYOUT_5POINT1_BACK: + return CHANNEL_LAYOUT_5POINT1_BACK; + case CH_LAYOUT_7POINT0: + return CHANNEL_LAYOUT_7POINT0; + case CH_LAYOUT_7POINT1: + return CHANNEL_LAYOUT_7POINT1; + case CH_LAYOUT_7POINT1_WIDE: + return CHANNEL_LAYOUT_7POINT1_WIDE; + case CH_LAYOUT_STEREO_DOWNMIX: + return CHANNEL_LAYOUT_STEREO_DOWNMIX; + default: + // FFmpeg channel_layout is 0 for .wav and .mp3. We know mono and stereo + // from the number of channels, otherwise report errors. + if (channels == 1) + return CHANNEL_LAYOUT_MONO; + if (channels == 2) + return CHANNEL_LAYOUT_STEREO; + DLOG(WARNING) << "Unsupported/unencountered channel layout values"; + return CHANNEL_LAYOUT_UNSUPPORTED; + } +} + base::TimeDelta GetFrameDuration(AVStream* stream) { AVRational time_base = { stream->r_frame_rate.den, stream->r_frame_rate.num }; return ConvertFromTimeBase(time_base, 1); diff --git a/media/ffmpeg/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h index 196b57e..3d39d52 100644 --- a/media/ffmpeg/ffmpeg_common.h +++ b/media/ffmpeg/ffmpeg_common.h @@ -11,6 +11,7 @@ #include "base/compiler_specific.h" #include "base/memory/singleton.h" #include "base/time.h" +#include "media/base/channel_layout.h" #include "media/video/video_decode_engine.h" // Include FFmpeg header files. @@ -66,6 +67,12 @@ int64 ConvertToTimeBase(const AVRational& time_base, VideoCodec CodecIDToVideoCodec(CodecID codec_id); CodecID VideoCodecToCodecID(VideoCodec video_codec); +// Converts FFmpeg's channel layout to chrome's ChannelLayout. |channels| can +// be used when FFmpeg's channel layout is not informative in order to make a +// good guess about the plausible channel layout based on number of channels. +ChannelLayout ChannelLayoutToChromeChannelLayout(int64_t layout, + int channels); + // Calculates duration of one frame in the |stream| based on its frame rate. base::TimeDelta GetFrameDuration(AVStream* stream); |