ffmpeg_decoder.c File Reference

FFmpeg-based media decoder implementation. More...

Go to the source code of this file.

Data Structures
struct	ffmpeg_decoder_t
	FFmpeg decoder state for video and audio decoding. More...
struct	stdin_buffer_t
struct	stdin_buffer_reader_t

Macros
#define	TARGET_SAMPLE_RATE   48000
#define	TARGET_CHANNELS   1
#define	AVIO_BUFFER_SIZE   (64 * 1024)

Functions
ffmpeg_decoder_t *	ffmpeg_decoder_create (const char *path)
	Create FFmpeg decoder from file path.
ffmpeg_decoder_t *	ffmpeg_decoder_create_stdin (void)
	Create FFmpeg decoder from stdin.
void	ffmpeg_decoder_destroy (ffmpeg_decoder_t *decoder)
	Destroy FFmpeg decoder and free resources.
image_t *	ffmpeg_decoder_read_video_frame (ffmpeg_decoder_t *decoder)
	Decode next video frame.
asciichat_error_t	ffmpeg_decoder_start_prefetch (ffmpeg_decoder_t *decoder)
	Start the background frame prefetching thread.
void	ffmpeg_decoder_stop_prefetch (ffmpeg_decoder_t *decoder)
	Stop the background frame prefetching thread.
void	ffmpeg_decoder_set_exit_callback (ffmpeg_decoder_t *decoder, bool(*should_exit_callback)(void *), void *user_data)
	Set exit signal callback for graceful shutdown during I/O.
bool	ffmpeg_decoder_is_prefetch_running (ffmpeg_decoder_t *decoder)
	Check if background frame prefetching thread is running.
bool	ffmpeg_decoder_has_video (ffmpeg_decoder_t *decoder)
	Check if decoder has video stream.
asciichat_error_t	ffmpeg_decoder_get_video_dimensions (ffmpeg_decoder_t *decoder, int *width, int *height)
	Get video dimensions.
double	ffmpeg_decoder_get_video_fps (ffmpeg_decoder_t *decoder)
	Get video frame rate.
size_t	ffmpeg_decoder_read_audio_samples (ffmpeg_decoder_t *decoder, float *buffer, size_t num_samples)
	Decode audio samples.
bool	ffmpeg_decoder_has_audio (ffmpeg_decoder_t *decoder)
	Check if decoder has audio stream.
asciichat_error_t	ffmpeg_decoder_rewind (ffmpeg_decoder_t *decoder)
	Seek to beginning of media.
asciichat_error_t	ffmpeg_decoder_seek_to_timestamp (ffmpeg_decoder_t *decoder, double timestamp_sec)
	Seek to specific timestamp in media.
bool	ffmpeg_decoder_at_end (ffmpeg_decoder_t *decoder)
	Check if decoder reached end of stream.
double	ffmpeg_decoder_get_duration (ffmpeg_decoder_t *decoder)
	Get media duration in seconds.
double	ffmpeg_decoder_get_position (ffmpeg_decoder_t *decoder)
	Get current playback position in seconds.

Detailed Description

FFmpeg-based media decoder implementation.

Definition in file media/ffmpeg_decoder.c.

Macro Definition Documentation

AVIO_BUFFER_SIZE

#define AVIO_BUFFER_SIZE   (64 * 1024)

AVIO buffer size for stdin reading (64KB)

Definition at line 56 of file media/ffmpeg_decoder.c.

TARGET_CHANNELS

#define TARGET_CHANNELS   1

Target audio channels (mono)

Definition at line 53 of file media/ffmpeg_decoder.c.

TARGET_SAMPLE_RATE

#define TARGET_SAMPLE_RATE   48000

Target audio sample rate (48kHz for Opus compatibility)

Definition at line 50 of file media/ffmpeg_decoder.c.