X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=ffmpeg_capture.h;fp=ffmpeg_capture.h;h=0000000000000000000000000000000000000000;hb=392f9d1ccb835c05a3874c4bea163788b2c37024;hp=8a513df971fa20f2cba71e25ac603242b9be3be3;hpb=330ca2f0052b06d91004c6ceb73cd57ab95e7fe1;p=nageru diff --git a/ffmpeg_capture.h b/ffmpeg_capture.h deleted file mode 100644 index 8a513df..0000000 --- a/ffmpeg_capture.h +++ /dev/null @@ -1,280 +0,0 @@ -#ifndef _FFMPEG_CAPTURE_H -#define _FFMPEG_CAPTURE_H 1 - -// FFmpegCapture looks much like a capture card, but the frames it spits out -// come from a video in real time, looping. Because it decodes the video using -// FFmpeg (thus the name), this means it can handle a very wide array of video -// formats, and also things like network streaming and V4L capture, but it is -// also significantly less integrated and optimized than the regular capture -// cards. In particular, the frames are always scaled and converted to 8-bit -// RGBA on the CPU before being sent on to the GPU. -// -// Since we don't really know much about the video when building the chains, -// there are some limitations. In particular, frames are always assumed to be -// sRGB even if the video container says something else. We could probably -// try to load the video on startup and pick out the parameters at that point, -// but it would require some more plumbing, and it would also fail if the file -// changes parameters midway, which is allowed in some formats. -// -// You can get out the audio either as decoded or in raw form (Kaeru uses this). - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -extern "C" { -#include -#include -#include -#include -} - -#include "bmusb/bmusb.h" -#include "ffmpeg_raii.h" -#include "ref_counted_frame.h" -#include "quittable_sleeper.h" - -struct AVFormatContext; -struct AVFrame; -struct AVRational; -struct AVPacket; - -class FFmpegCapture : public bmusb::CaptureInterface -{ -public: - FFmpegCapture(const std::string &filename, unsigned width, unsigned height); - ~FFmpegCapture(); - - void set_card_index(int card_index) - { - this->card_index = card_index; - } - - int get_card_index() const - { - return card_index; - } - - void rewind() - { - std::lock_guard lock(queue_mu); - command_queue.push_back(QueuedCommand { QueuedCommand::REWIND }); - producer_thread_should_quit.wakeup(); - } - - void change_rate(double new_rate) - { - std::lock_guard lock(queue_mu); - command_queue.push_back(QueuedCommand { QueuedCommand::CHANGE_RATE, new_rate }); - producer_thread_should_quit.wakeup(); - } - - std::string get_filename() const - { - std::lock_guard lock(filename_mu); - return filename; - } - - void change_filename(const std::string &new_filename) - { - std::lock_guard lock(filename_mu); - filename = new_filename; - should_interrupt = true; - } - - // Will stop the stream even if it's hung on blocking I/O. - void disconnect() - { - should_interrupt = true; - } - - // CaptureInterface. - void set_video_frame_allocator(bmusb::FrameAllocator *allocator) override - { - video_frame_allocator = allocator; - if (owned_video_frame_allocator.get() != allocator) { - owned_video_frame_allocator.reset(); - } - } - - bmusb::FrameAllocator *get_video_frame_allocator() override - { - return video_frame_allocator; - } - - // Does not take ownership. - void set_audio_frame_allocator(bmusb::FrameAllocator *allocator) override - { - audio_frame_allocator = allocator; - if (owned_audio_frame_allocator.get() != allocator) { - owned_audio_frame_allocator.reset(); - } - } - - bmusb::FrameAllocator *get_audio_frame_allocator() override - { - return audio_frame_allocator; - } - - // FFmpegCapture-specific overload of set_frame_callback that also gives - // the raw original pts from the video. Negative pts means a dummy frame. - typedef std::function - frame_callback_t; - void set_frame_callback(frame_callback_t callback) - { - frame_callback = callback; - } - - void set_frame_callback(bmusb::frame_callback_t callback) override - { - frame_callback = std::bind( - callback, - std::placeholders::_5, - std::placeholders::_6, - std::placeholders::_7, - std::placeholders::_8, - std::placeholders::_9, - std::placeholders::_10, - std::placeholders::_11); - } - - // FFmpegCapture-specific callback that gives the raw audio. - typedef std::function audio_callback_t; - void set_audio_callback(audio_callback_t callback) - { - audio_callback = callback; - } - - // Used to get precise information about the Y'CbCr format used - // for a given frame. Only valid to call during the frame callback, - // and only when receiving a frame with pixel format PixelFormat_8BitYCbCrPlanar. - movit::YCbCrFormat get_current_frame_ycbcr_format() const - { - return current_frame_ycbcr_format; - } - - void set_dequeue_thread_callbacks(std::function init, std::function cleanup) override - { - dequeue_init_callback = init; - dequeue_cleanup_callback = cleanup; - has_dequeue_callbacks = true; - } - - std::string get_description() const override - { - return description; - } - - void configure_card() override; - void start_bm_capture() override; - void stop_dequeue_thread() override; - bool get_disconnected() const override { return false; } // We never unplug. - - std::map get_available_video_modes() const override; - void set_video_mode(uint32_t video_mode_id) override {} // Ignore. - uint32_t get_current_video_mode() const override { return 0; } - - static constexpr bmusb::PixelFormat PixelFormat_NV12 = static_cast(100); // In the private range. - std::set get_available_pixel_formats() const override { - return std::set{ bmusb::PixelFormat_8BitBGRA, bmusb::PixelFormat_8BitYCbCrPlanar, PixelFormat_NV12 }; - } - void set_pixel_format(bmusb::PixelFormat pixel_format) override { - this->pixel_format = pixel_format; - } - bmusb::PixelFormat get_current_pixel_format() const override { - return pixel_format; - } - - std::map get_available_video_inputs() const override { - return { { 0, "Auto" } }; } - void set_video_input(uint32_t video_input_id) override {} // Ignore. - uint32_t get_current_video_input() const override { return 0; } - - std::map get_available_audio_inputs() const override { - return { { 0, "Embedded" } }; - } - void set_audio_input(uint32_t audio_input_id) override {} // Ignore. - uint32_t get_current_audio_input() const override { return 0; } - -private: - void producer_thread_func(); - void send_disconnected_frame(); - bool play_video(const std::string &pathname); - void internal_rewind(); - - // Returns true if there was an error. - bool process_queued_commands(AVFormatContext *format_ctx, const std::string &pathname, timespec last_modified, bool *rewound); - - // Returns nullptr if no frame was decoded (e.g. EOF). - AVFrameWithDeleter decode_frame(AVFormatContext *format_ctx, AVCodecContext *video_codec_ctx, AVCodecContext *audio_codec_ctx, - const std::string &pathname, int video_stream_index, int audio_stream_index, - bmusb::FrameAllocator::Frame *audio_frame, bmusb::AudioFormat *audio_format, int64_t *audio_pts, bool *error); - void convert_audio(const AVFrame *audio_avframe, bmusb::FrameAllocator::Frame *audio_frame, bmusb::AudioFormat *audio_format); - - bmusb::VideoFormat construct_video_format(const AVFrame *frame, AVRational video_timebase); - UniqueFrame make_video_frame(const AVFrame *frame, const std::string &pathname, bool *error); - - static int interrupt_cb_thunk(void *unique); - int interrupt_cb(); - - mutable std::mutex filename_mu; - std::string description, filename; - uint16_t timecode = 0; - unsigned width, height; - bmusb::PixelFormat pixel_format = bmusb::PixelFormat_8BitBGRA; - movit::YCbCrFormat current_frame_ycbcr_format; - bool running = false; - int card_index = -1; - double rate = 1.0; - std::atomic should_interrupt{false}; - bool last_frame_was_connected = true; - - bool has_dequeue_callbacks = false; - std::function dequeue_init_callback = nullptr; - std::function dequeue_cleanup_callback = nullptr; - - bmusb::FrameAllocator *video_frame_allocator = nullptr; - bmusb::FrameAllocator *audio_frame_allocator = nullptr; - std::unique_ptr owned_video_frame_allocator; - std::unique_ptr owned_audio_frame_allocator; - frame_callback_t frame_callback = nullptr; - audio_callback_t audio_callback = nullptr; - - SwsContextWithDeleter sws_ctx; - int sws_last_width = -1, sws_last_height = -1, sws_last_src_format = -1; - AVPixelFormat sws_dst_format = AVPixelFormat(-1); // In practice, always initialized. - AVRational video_timebase, audio_timebase; - - QuittableSleeper producer_thread_should_quit; - std::thread producer_thread; - - int64_t pts_origin, last_pts; - std::chrono::steady_clock::time_point start, next_frame_start, last_frame; - - std::mutex queue_mu; - struct QueuedCommand { - enum Command { REWIND, CHANGE_RATE } command; - double new_rate; // For CHANGE_RATE. - }; - std::vector command_queue; // Protected by . - - // Audio resampler. - AVAudioResampleContext *resampler = nullptr; - AVSampleFormat last_src_format, last_dst_format; - int64_t last_channel_layout; - int last_sample_rate; - -}; - -#endif // !defined(_FFMPEG_CAPTURE_H)