ff_format/

stream.rs

//! Video and audio stream information.
//!
//! This module provides structs for representing metadata about video and
//! audio streams within media files.
//!
//! # Examples
//!
//! ```
//! use ff_format::stream::{VideoStreamInfo, AudioStreamInfo};
//! use ff_format::{PixelFormat, SampleFormat, Rational};
//! use ff_format::codec::{VideoCodec, AudioCodec};
//! use ff_format::color::{ColorSpace, ColorRange, ColorPrimaries};
//! use ff_format::channel::ChannelLayout;
//! use std::time::Duration;
//!
//! // Create video stream info
//! let video = VideoStreamInfo::builder()
//!     .index(0)
//!     .codec(VideoCodec::H264)
//!     .width(1920)
//!     .height(1080)
//!     .frame_rate(Rational::new(30, 1))
//!     .pixel_format(PixelFormat::Yuv420p)
//!     .build();
//!
//! assert_eq!(video.width(), 1920);
//! assert_eq!(video.height(), 1080);
//!
//! // Create audio stream info
//! let audio = AudioStreamInfo::builder()
//!     .index(1)
//!     .codec(AudioCodec::Aac)
//!     .sample_rate(48000)
//!     .channels(2)
//!     .sample_format(SampleFormat::F32)
//!     .build();
//!
//! assert_eq!(audio.sample_rate(), 48000);
//! assert_eq!(audio.channels(), 2);
//! ```

use std::time::Duration;

use crate::channel::ChannelLayout;
use crate::codec::{AudioCodec, VideoCodec};
use crate::color::{ColorPrimaries, ColorRange, ColorSpace};
use crate::pixel::PixelFormat;
use crate::sample::SampleFormat;
use crate::time::Rational;

/// Information about a video stream within a media file.
///
/// This struct contains all metadata needed to understand and process
/// a video stream, including resolution, codec, frame rate, and color
/// characteristics.
///
/// # Construction
///
/// Use [`VideoStreamInfo::builder()`] for fluent construction:
///
/// ```
/// use ff_format::stream::VideoStreamInfo;
/// use ff_format::{PixelFormat, Rational};
/// use ff_format::codec::VideoCodec;
///
/// let info = VideoStreamInfo::builder()
///     .index(0)
///     .codec(VideoCodec::H264)
///     .width(1920)
///     .height(1080)
///     .frame_rate(Rational::new(30, 1))
///     .build();
/// ```
#[derive(Debug, Clone)]
pub struct VideoStreamInfo {
    /// Stream index within the container
    index: u32,
    /// Video codec
    codec: VideoCodec,
    /// Codec name as reported by the demuxer
    codec_name: String,
    /// Frame width in pixels
    width: u32,
    /// Frame height in pixels
    height: u32,
    /// Pixel format
    pixel_format: PixelFormat,
    /// Frame rate (frames per second)
    frame_rate: Rational,
    /// Stream duration (if known)
    duration: Option<Duration>,
    /// Bitrate in bits per second (if known)
    bitrate: Option<u64>,
    /// Total number of frames (if known)
    frame_count: Option<u64>,
    /// Color space (matrix coefficients)
    color_space: ColorSpace,
    /// Color range (limited/full)
    color_range: ColorRange,
    /// Color primaries
    color_primaries: ColorPrimaries,
}

impl VideoStreamInfo {
    /// Creates a new builder for constructing `VideoStreamInfo`.
    ///
    /// # Examples
    ///
    /// ```
    /// use ff_format::stream::VideoStreamInfo;
    /// use ff_format::codec::VideoCodec;
    /// use ff_format::{PixelFormat, Rational};
    ///
    /// let info = VideoStreamInfo::builder()
    ///     .index(0)
    ///     .codec(VideoCodec::H264)
    ///     .width(1920)
    ///     .height(1080)
    ///     .frame_rate(Rational::new(30, 1))
    ///     .build();
    /// ```
    #[must_use]
    pub fn builder() -> VideoStreamInfoBuilder {
        VideoStreamInfoBuilder::default()
    }

    /// Returns the stream index within the container.
    #[must_use]
    #[inline]
    pub const fn index(&self) -> u32 {
        self.index
    }

    /// Returns the video codec.
    #[must_use]
    #[inline]
    pub const fn codec(&self) -> VideoCodec {
        self.codec
    }

    /// Returns the codec name as reported by the demuxer.
    #[must_use]
    #[inline]
    pub fn codec_name(&self) -> &str {
        &self.codec_name
    }

    /// Returns the frame width in pixels.
    #[must_use]
    #[inline]
    pub const fn width(&self) -> u32 {
        self.width
    }

    /// Returns the frame height in pixels.
    #[must_use]
    #[inline]
    pub const fn height(&self) -> u32 {
        self.height
    }

    /// Returns the pixel format.
    #[must_use]
    #[inline]
    pub const fn pixel_format(&self) -> PixelFormat {
        self.pixel_format
    }

    /// Returns the frame rate as a rational number.
    #[must_use]
    #[inline]
    pub const fn frame_rate(&self) -> Rational {
        self.frame_rate
    }

    /// Returns the frame rate as frames per second (f64).
    #[must_use]
    #[inline]
    pub fn fps(&self) -> f64 {
        self.frame_rate.as_f64()
    }

    /// Returns the stream duration, if known.
    #[must_use]
    #[inline]
    pub const fn duration(&self) -> Option<Duration> {
        self.duration
    }

    /// Returns the bitrate in bits per second, if known.
    #[must_use]
    #[inline]
    pub const fn bitrate(&self) -> Option<u64> {
        self.bitrate
    }

    /// Returns the total number of frames, if known.
    #[must_use]
    #[inline]
    pub const fn frame_count(&self) -> Option<u64> {
        self.frame_count
    }

    /// Returns the color space (matrix coefficients).
    #[must_use]
    #[inline]
    pub const fn color_space(&self) -> ColorSpace {
        self.color_space
    }

    /// Returns the color range (limited/full).
    #[must_use]
    #[inline]
    pub const fn color_range(&self) -> ColorRange {
        self.color_range
    }

    /// Returns the color primaries.
    #[must_use]
    #[inline]
    pub const fn color_primaries(&self) -> ColorPrimaries {
        self.color_primaries
    }

    /// Returns the aspect ratio as width/height.
    #[must_use]
    #[inline]
    pub fn aspect_ratio(&self) -> f64 {
        if self.height == 0 {
            0.0
        } else {
            f64::from(self.width) / f64::from(self.height)
        }
    }

    /// Returns `true` if the video is HD (720p or higher).
    #[must_use]
    #[inline]
    pub const fn is_hd(&self) -> bool {
        self.height >= 720
    }

    /// Returns `true` if the video is Full HD (1080p or higher).
    #[must_use]
    #[inline]
    pub const fn is_full_hd(&self) -> bool {
        self.height >= 1080
    }

    /// Returns `true` if the video is 4K UHD (2160p or higher).
    #[must_use]
    #[inline]
    pub const fn is_4k(&self) -> bool {
        self.height >= 2160
    }

    /// Returns `true` if this video stream appears to be HDR (High Dynamic Range).
    ///
    /// HDR detection is based on two primary indicators:
    /// 1. **Wide color gamut**: BT.2020 color primaries
    /// 2. **High bit depth**: 10-bit or higher pixel format
    ///
    /// Both conditions must be met for a stream to be considered HDR.
    /// This is a heuristic detection - for definitive HDR identification,
    /// additional metadata like transfer characteristics (PQ/HLG) should be checked.
    ///
    /// # Examples
    ///
    /// ```
    /// use ff_format::stream::VideoStreamInfo;
    /// use ff_format::color::ColorPrimaries;
    /// use ff_format::PixelFormat;
    ///
    /// let hdr_video = VideoStreamInfo::builder()
    ///     .width(3840)
    ///     .height(2160)
    ///     .color_primaries(ColorPrimaries::Bt2020)
    ///     .pixel_format(PixelFormat::Yuv420p10le)
    ///     .build();
    ///
    /// assert!(hdr_video.is_hdr());
    ///
    /// // Standard HD video with BT.709 is not HDR
    /// let sdr_video = VideoStreamInfo::builder()
    ///     .width(1920)
    ///     .height(1080)
    ///     .color_primaries(ColorPrimaries::Bt709)
    ///     .pixel_format(PixelFormat::Yuv420p)
    ///     .build();
    ///
    /// assert!(!sdr_video.is_hdr());
    /// ```
    #[must_use]
    #[inline]
    pub fn is_hdr(&self) -> bool {
        // HDR requires wide color gamut (BT.2020) and high bit depth (10-bit or higher)
        self.color_primaries.is_wide_gamut() && self.pixel_format.is_high_bit_depth()
    }
}

impl Default for VideoStreamInfo {
    fn default() -> Self {
        Self {
            index: 0,
            codec: VideoCodec::default(),
            codec_name: String::new(),
            width: 0,
            height: 0,
            pixel_format: PixelFormat::default(),
            frame_rate: Rational::new(30, 1),
            duration: None,
            bitrate: None,
            frame_count: None,
            color_space: ColorSpace::default(),
            color_range: ColorRange::default(),
            color_primaries: ColorPrimaries::default(),
        }
    }
}

/// Builder for constructing `VideoStreamInfo`.
#[derive(Debug, Clone, Default)]
pub struct VideoStreamInfoBuilder {
    index: u32,
    codec: VideoCodec,
    codec_name: String,
    width: u32,
    height: u32,
    pixel_format: PixelFormat,
    frame_rate: Rational,
    duration: Option<Duration>,
    bitrate: Option<u64>,
    frame_count: Option<u64>,
    color_space: ColorSpace,
    color_range: ColorRange,
    color_primaries: ColorPrimaries,
}

impl VideoStreamInfoBuilder {
    /// Sets the stream index.
    #[must_use]
    pub fn index(mut self, index: u32) -> Self {
        self.index = index;
        self
    }

    /// Sets the video codec.
    #[must_use]
    pub fn codec(mut self, codec: VideoCodec) -> Self {
        self.codec = codec;
        self
    }

    /// Sets the codec name string.
    #[must_use]
    pub fn codec_name(mut self, name: impl Into<String>) -> Self {
        self.codec_name = name.into();
        self
    }

    /// Sets the frame width in pixels.
    #[must_use]
    pub fn width(mut self, width: u32) -> Self {
        self.width = width;
        self
    }

    /// Sets the frame height in pixels.
    #[must_use]
    pub fn height(mut self, height: u32) -> Self {
        self.height = height;
        self
    }

    /// Sets the pixel format.
    #[must_use]
    pub fn pixel_format(mut self, format: PixelFormat) -> Self {
        self.pixel_format = format;
        self
    }

    /// Sets the frame rate.
    #[must_use]
    pub fn frame_rate(mut self, rate: Rational) -> Self {
        self.frame_rate = rate;
        self
    }

    /// Sets the stream duration.
    #[must_use]
    pub fn duration(mut self, duration: Duration) -> Self {
        self.duration = Some(duration);
        self
    }

    /// Sets the bitrate in bits per second.
    #[must_use]
    pub fn bitrate(mut self, bitrate: u64) -> Self {
        self.bitrate = Some(bitrate);
        self
    }

    /// Sets the total frame count.
    #[must_use]
    pub fn frame_count(mut self, count: u64) -> Self {
        self.frame_count = Some(count);
        self
    }

    /// Sets the color space.
    #[must_use]
    pub fn color_space(mut self, space: ColorSpace) -> Self {
        self.color_space = space;
        self
    }

    /// Sets the color range.
    #[must_use]
    pub fn color_range(mut self, range: ColorRange) -> Self {
        self.color_range = range;
        self
    }

    /// Sets the color primaries.
    #[must_use]
    pub fn color_primaries(mut self, primaries: ColorPrimaries) -> Self {
        self.color_primaries = primaries;
        self
    }

    /// Builds the `VideoStreamInfo`.
    #[must_use]
    pub fn build(self) -> VideoStreamInfo {
        VideoStreamInfo {
            index: self.index,
            codec: self.codec,
            codec_name: self.codec_name,
            width: self.width,
            height: self.height,
            pixel_format: self.pixel_format,
            frame_rate: self.frame_rate,
            duration: self.duration,
            bitrate: self.bitrate,
            frame_count: self.frame_count,
            color_space: self.color_space,
            color_range: self.color_range,
            color_primaries: self.color_primaries,
        }
    }
}

/// Information about an audio stream within a media file.
///
/// This struct contains all metadata needed to understand and process
/// an audio stream, including sample rate, channel layout, and codec
/// information.
///
/// # Construction
///
/// Use [`AudioStreamInfo::builder()`] for fluent construction:
///
/// ```
/// use ff_format::stream::AudioStreamInfo;
/// use ff_format::SampleFormat;
/// use ff_format::codec::AudioCodec;
///
/// let info = AudioStreamInfo::builder()
///     .index(1)
///     .codec(AudioCodec::Aac)
///     .sample_rate(48000)
///     .channels(2)
///     .build();
/// ```
#[derive(Debug, Clone)]
pub struct AudioStreamInfo {
    /// Stream index within the container
    index: u32,
    /// Audio codec
    codec: AudioCodec,
    /// Codec name as reported by the demuxer
    codec_name: String,
    /// Sample rate in Hz
    sample_rate: u32,
    /// Number of channels
    channels: u32,
    /// Channel layout
    channel_layout: ChannelLayout,
    /// Sample format
    sample_format: SampleFormat,
    /// Stream duration (if known)
    duration: Option<Duration>,
    /// Bitrate in bits per second (if known)
    bitrate: Option<u64>,
    /// Language code (e.g., "eng", "jpn")
    language: Option<String>,
}

impl AudioStreamInfo {
    /// Creates a new builder for constructing `AudioStreamInfo`.
    ///
    /// # Examples
    ///
    /// ```
    /// use ff_format::stream::AudioStreamInfo;
    /// use ff_format::codec::AudioCodec;
    /// use ff_format::SampleFormat;
    ///
    /// let info = AudioStreamInfo::builder()
    ///     .index(1)
    ///     .codec(AudioCodec::Aac)
    ///     .sample_rate(48000)
    ///     .channels(2)
    ///     .build();
    /// ```
    #[must_use]
    pub fn builder() -> AudioStreamInfoBuilder {
        AudioStreamInfoBuilder::default()
    }

    /// Returns the stream index within the container.
    #[must_use]
    #[inline]
    pub const fn index(&self) -> u32 {
        self.index
    }

    /// Returns the audio codec.
    #[must_use]
    #[inline]
    pub const fn codec(&self) -> AudioCodec {
        self.codec
    }

    /// Returns the codec name as reported by the demuxer.
    #[must_use]
    #[inline]
    pub fn codec_name(&self) -> &str {
        &self.codec_name
    }

    /// Returns the sample rate in Hz.
    #[must_use]
    #[inline]
    pub const fn sample_rate(&self) -> u32 {
        self.sample_rate
    }

    /// Returns the number of audio channels.
    #[must_use]
    #[inline]
    pub const fn channels(&self) -> u32 {
        self.channels
    }

    /// Returns the channel layout.
    #[must_use]
    #[inline]
    pub const fn channel_layout(&self) -> ChannelLayout {
        self.channel_layout
    }

    /// Returns the sample format.
    #[must_use]
    #[inline]
    pub const fn sample_format(&self) -> SampleFormat {
        self.sample_format
    }

    /// Returns the stream duration, if known.
    #[must_use]
    #[inline]
    pub const fn duration(&self) -> Option<Duration> {
        self.duration
    }

    /// Returns the bitrate in bits per second, if known.
    #[must_use]
    #[inline]
    pub const fn bitrate(&self) -> Option<u64> {
        self.bitrate
    }

    /// Returns the language code, if specified.
    #[must_use]
    #[inline]
    pub fn language(&self) -> Option<&str> {
        self.language.as_deref()
    }

    /// Returns `true` if this is a mono stream.
    #[must_use]
    #[inline]
    pub const fn is_mono(&self) -> bool {
        self.channels == 1
    }

    /// Returns `true` if this is a stereo stream.
    #[must_use]
    #[inline]
    pub const fn is_stereo(&self) -> bool {
        self.channels == 2
    }

    /// Returns `true` if this is a surround sound stream (more than 2 channels).
    #[must_use]
    #[inline]
    pub const fn is_surround(&self) -> bool {
        self.channels > 2
    }
}

impl Default for AudioStreamInfo {
    fn default() -> Self {
        Self {
            index: 0,
            codec: AudioCodec::default(),
            codec_name: String::new(),
            sample_rate: 48000,
            channels: 2,
            channel_layout: ChannelLayout::default(),
            sample_format: SampleFormat::default(),
            duration: None,
            bitrate: None,
            language: None,
        }
    }
}

/// Builder for constructing `AudioStreamInfo`.
#[derive(Debug, Clone, Default)]
pub struct AudioStreamInfoBuilder {
    index: u32,
    codec: AudioCodec,
    codec_name: String,
    sample_rate: u32,
    channels: u32,
    channel_layout: Option<ChannelLayout>,
    sample_format: SampleFormat,
    duration: Option<Duration>,
    bitrate: Option<u64>,
    language: Option<String>,
}

impl AudioStreamInfoBuilder {
    /// Sets the stream index.
    #[must_use]
    pub fn index(mut self, index: u32) -> Self {
        self.index = index;
        self
    }

    /// Sets the audio codec.
    #[must_use]
    pub fn codec(mut self, codec: AudioCodec) -> Self {
        self.codec = codec;
        self
    }

    /// Sets the codec name string.
    #[must_use]
    pub fn codec_name(mut self, name: impl Into<String>) -> Self {
        self.codec_name = name.into();
        self
    }

    /// Sets the sample rate in Hz.
    #[must_use]
    pub fn sample_rate(mut self, rate: u32) -> Self {
        self.sample_rate = rate;
        self
    }

    /// Sets the number of channels.
    ///
    /// This also updates the channel layout if not explicitly set.
    #[must_use]
    pub fn channels(mut self, channels: u32) -> Self {
        self.channels = channels;
        self
    }

    /// Sets the channel layout explicitly.
    #[must_use]
    pub fn channel_layout(mut self, layout: ChannelLayout) -> Self {
        self.channel_layout = Some(layout);
        self
    }

    /// Sets the sample format.
    #[must_use]
    pub fn sample_format(mut self, format: SampleFormat) -> Self {
        self.sample_format = format;
        self
    }

    /// Sets the stream duration.
    #[must_use]
    pub fn duration(mut self, duration: Duration) -> Self {
        self.duration = Some(duration);
        self
    }

    /// Sets the bitrate in bits per second.
    #[must_use]
    pub fn bitrate(mut self, bitrate: u64) -> Self {
        self.bitrate = Some(bitrate);
        self
    }

    /// Sets the language code.
    #[must_use]
    pub fn language(mut self, lang: impl Into<String>) -> Self {
        self.language = Some(lang.into());
        self
    }

    /// Builds the `AudioStreamInfo`.
    #[must_use]
    pub fn build(self) -> AudioStreamInfo {
        let channel_layout = self
            .channel_layout
            .unwrap_or_else(|| ChannelLayout::from_channels(self.channels));

        AudioStreamInfo {
            index: self.index,
            codec: self.codec,
            codec_name: self.codec_name,
            sample_rate: self.sample_rate,
            channels: self.channels,
            channel_layout,
            sample_format: self.sample_format,
            duration: self.duration,
            bitrate: self.bitrate,
            language: self.language,
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    mod video_stream_info_tests {
        use super::*;

        #[test]
        fn test_builder_basic() {
            let info = VideoStreamInfo::builder()
                .index(0)
                .codec(VideoCodec::H264)
                .codec_name("h264")
                .width(1920)
                .height(1080)
                .frame_rate(Rational::new(30, 1))
                .pixel_format(PixelFormat::Yuv420p)
                .build();

            assert_eq!(info.index(), 0);
            assert_eq!(info.codec(), VideoCodec::H264);
            assert_eq!(info.codec_name(), "h264");
            assert_eq!(info.width(), 1920);
            assert_eq!(info.height(), 1080);
            assert!((info.fps() - 30.0).abs() < 0.001);
            assert_eq!(info.pixel_format(), PixelFormat::Yuv420p);
        }

        #[test]
        fn test_builder_full() {
            let info = VideoStreamInfo::builder()
                .index(0)
                .codec(VideoCodec::H265)
                .codec_name("hevc")
                .width(3840)
                .height(2160)
                .frame_rate(Rational::new(60, 1))
                .pixel_format(PixelFormat::Yuv420p10le)
                .duration(Duration::from_secs(120))
                .bitrate(50_000_000)
                .frame_count(7200)
                .color_space(ColorSpace::Bt2020)
                .color_range(ColorRange::Full)
                .color_primaries(ColorPrimaries::Bt2020)
                .build();

            assert_eq!(info.codec(), VideoCodec::H265);
            assert_eq!(info.width(), 3840);
            assert_eq!(info.height(), 2160);
            assert_eq!(info.duration(), Some(Duration::from_secs(120)));
            assert_eq!(info.bitrate(), Some(50_000_000));
            assert_eq!(info.frame_count(), Some(7200));
            assert_eq!(info.color_space(), ColorSpace::Bt2020);
            assert_eq!(info.color_range(), ColorRange::Full);
            assert_eq!(info.color_primaries(), ColorPrimaries::Bt2020);
        }

        #[test]
        fn test_default() {
            let info = VideoStreamInfo::default();
            assert_eq!(info.index(), 0);
            assert_eq!(info.codec(), VideoCodec::default());
            assert_eq!(info.width(), 0);
            assert_eq!(info.height(), 0);
            assert!(info.duration().is_none());
        }

        #[test]
        fn test_aspect_ratio() {
            let info = VideoStreamInfo::builder().width(1920).height(1080).build();
            assert!((info.aspect_ratio() - (16.0 / 9.0)).abs() < 0.01);

            let info = VideoStreamInfo::builder().width(1280).height(720).build();
            assert!((info.aspect_ratio() - (16.0 / 9.0)).abs() < 0.01);

            // Zero height
            let info = VideoStreamInfo::builder().width(1920).height(0).build();
            assert_eq!(info.aspect_ratio(), 0.0);
        }

        #[test]
        fn test_resolution_checks() {
            // SD
            let sd = VideoStreamInfo::builder().width(720).height(480).build();
            assert!(!sd.is_hd());
            assert!(!sd.is_full_hd());
            assert!(!sd.is_4k());

            // HD
            let hd = VideoStreamInfo::builder().width(1280).height(720).build();
            assert!(hd.is_hd());
            assert!(!hd.is_full_hd());
            assert!(!hd.is_4k());

            // Full HD
            let fhd = VideoStreamInfo::builder().width(1920).height(1080).build();
            assert!(fhd.is_hd());
            assert!(fhd.is_full_hd());
            assert!(!fhd.is_4k());

            // 4K
            let uhd = VideoStreamInfo::builder().width(3840).height(2160).build();
            assert!(uhd.is_hd());
            assert!(uhd.is_full_hd());
            assert!(uhd.is_4k());
        }

        #[test]
        fn test_is_hdr() {
            // HDR video: BT.2020 color primaries + 10-bit pixel format
            let hdr = VideoStreamInfo::builder()
                .width(3840)
                .height(2160)
                .color_primaries(ColorPrimaries::Bt2020)
                .pixel_format(PixelFormat::Yuv420p10le)
                .build();
            assert!(hdr.is_hdr());

            // HDR video with P010le format
            let hdr_p010 = VideoStreamInfo::builder()
                .width(3840)
                .height(2160)
                .color_primaries(ColorPrimaries::Bt2020)
                .pixel_format(PixelFormat::P010le)
                .build();
            assert!(hdr_p010.is_hdr());

            // SDR video: BT.709 color primaries (standard HD)
            let sdr_hd = VideoStreamInfo::builder()
                .width(1920)
                .height(1080)
                .color_primaries(ColorPrimaries::Bt709)
                .pixel_format(PixelFormat::Yuv420p)
                .build();
            assert!(!sdr_hd.is_hdr());

            // BT.2020 but 8-bit (not HDR - missing high bit depth)
            let wide_gamut_8bit = VideoStreamInfo::builder()
                .width(3840)
                .height(2160)
                .color_primaries(ColorPrimaries::Bt2020)
                .pixel_format(PixelFormat::Yuv420p) // 8-bit
                .build();
            assert!(!wide_gamut_8bit.is_hdr());

            // 10-bit but BT.709 (not HDR - missing wide gamut)
            let hd_10bit = VideoStreamInfo::builder()
                .width(1920)
                .height(1080)
                .color_primaries(ColorPrimaries::Bt709)
                .pixel_format(PixelFormat::Yuv420p10le)
                .build();
            assert!(!hd_10bit.is_hdr());

            // Default video stream is not HDR
            let default = VideoStreamInfo::default();
            assert!(!default.is_hdr());
        }

        #[test]
        fn test_debug() {
            let info = VideoStreamInfo::builder()
                .index(0)
                .codec(VideoCodec::H264)
                .width(1920)
                .height(1080)
                .build();
            let debug = format!("{info:?}");
            assert!(debug.contains("VideoStreamInfo"));
            assert!(debug.contains("1920"));
            assert!(debug.contains("1080"));
        }

        #[test]
        fn test_clone() {
            let info = VideoStreamInfo::builder()
                .index(0)
                .codec(VideoCodec::H264)
                .codec_name("h264")
                .width(1920)
                .height(1080)
                .build();
            let cloned = info.clone();
            assert_eq!(info.width(), cloned.width());
            assert_eq!(info.height(), cloned.height());
            assert_eq!(info.codec_name(), cloned.codec_name());
        }
    }

    mod audio_stream_info_tests {
        use super::*;

        #[test]
        fn test_builder_basic() {
            let info = AudioStreamInfo::builder()
                .index(1)
                .codec(AudioCodec::Aac)
                .codec_name("aac")
                .sample_rate(48000)
                .channels(2)
                .sample_format(SampleFormat::F32)
                .build();

            assert_eq!(info.index(), 1);
            assert_eq!(info.codec(), AudioCodec::Aac);
            assert_eq!(info.codec_name(), "aac");
            assert_eq!(info.sample_rate(), 48000);
            assert_eq!(info.channels(), 2);
            assert_eq!(info.sample_format(), SampleFormat::F32);
            assert_eq!(info.channel_layout(), ChannelLayout::Stereo);
        }

        #[test]
        fn test_builder_full() {
            let info = AudioStreamInfo::builder()
                .index(2)
                .codec(AudioCodec::Flac)
                .codec_name("flac")
                .sample_rate(96000)
                .channels(6)
                .channel_layout(ChannelLayout::Surround5_1)
                .sample_format(SampleFormat::I32)
                .duration(Duration::from_secs(300))
                .bitrate(1_411_200)
                .language("jpn")
                .build();

            assert_eq!(info.codec(), AudioCodec::Flac);
            assert_eq!(info.sample_rate(), 96000);
            assert_eq!(info.channels(), 6);
            assert_eq!(info.channel_layout(), ChannelLayout::Surround5_1);
            assert_eq!(info.duration(), Some(Duration::from_secs(300)));
            assert_eq!(info.bitrate(), Some(1_411_200));
            assert_eq!(info.language(), Some("jpn"));
        }

        #[test]
        fn test_default() {
            let info = AudioStreamInfo::default();
            assert_eq!(info.index(), 0);
            assert_eq!(info.codec(), AudioCodec::default());
            assert_eq!(info.sample_rate(), 48000);
            assert_eq!(info.channels(), 2);
            assert!(info.duration().is_none());
        }

        #[test]
        fn test_auto_channel_layout() {
            // Should auto-detect layout from channel count
            let mono = AudioStreamInfo::builder().channels(1).build();
            assert_eq!(mono.channel_layout(), ChannelLayout::Mono);

            let stereo = AudioStreamInfo::builder().channels(2).build();
            assert_eq!(stereo.channel_layout(), ChannelLayout::Stereo);

            let surround = AudioStreamInfo::builder().channels(6).build();
            assert_eq!(surround.channel_layout(), ChannelLayout::Surround5_1);

            // Explicit layout should override
            let custom = AudioStreamInfo::builder()
                .channels(6)
                .channel_layout(ChannelLayout::Other(6))
                .build();
            assert_eq!(custom.channel_layout(), ChannelLayout::Other(6));
        }

        #[test]
        fn test_channel_checks() {
            let mono = AudioStreamInfo::builder().channels(1).build();
            assert!(mono.is_mono());
            assert!(!mono.is_stereo());
            assert!(!mono.is_surround());

            let stereo = AudioStreamInfo::builder().channels(2).build();
            assert!(!stereo.is_mono());
            assert!(stereo.is_stereo());
            assert!(!stereo.is_surround());

            let surround = AudioStreamInfo::builder().channels(6).build();
            assert!(!surround.is_mono());
            assert!(!surround.is_stereo());
            assert!(surround.is_surround());
        }

        #[test]
        fn test_debug() {
            let info = AudioStreamInfo::builder()
                .index(1)
                .codec(AudioCodec::Aac)
                .sample_rate(48000)
                .channels(2)
                .build();
            let debug = format!("{info:?}");
            assert!(debug.contains("AudioStreamInfo"));
            assert!(debug.contains("48000"));
        }

        #[test]
        fn test_clone() {
            let info = AudioStreamInfo::builder()
                .index(1)
                .codec(AudioCodec::Aac)
                .codec_name("aac")
                .sample_rate(48000)
                .channels(2)
                .language("eng")
                .build();
            let cloned = info.clone();
            assert_eq!(info.sample_rate(), cloned.sample_rate());
            assert_eq!(info.channels(), cloned.channels());
            assert_eq!(info.language(), cloned.language());
            assert_eq!(info.codec_name(), cloned.codec_name());
        }
    }
}