4d71837fb8
* refactor best frame process * refactor best frame process, remove alpha * move thumb context to export * process_frames() filter * test: update golden files * process_frames() filter * test: update golden files * tweak fps * test: update golden files * cleanup
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#include <math.h>
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#include <pthread.h>
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#include <float.h>
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#include <libavformat/avformat.h>
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#include <libavcodec/avcodec.h>
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#include <libavutil/opt.h>
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#include <libavutil/file.h>
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#include <libavutil/pixfmt.h>
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#include <libswscale/swscale.h>
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#include <libavutil/pixdesc.h>
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#include <libavutil/intreadwrite.h>
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#include <libavutil/imgutils.h>
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#include <libavutil/display.h>
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#define BUFFER_SIZE 1 << 12
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#define READ_PACKET_FLAG 1
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#define SEEK_PACKET_FLAG 2
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#define INTERRUPT_FLAG 3
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#define HAS_VIDEO_STREAM 1
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#define HAS_AUDIO_STREAM 2
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#define ERR_TOO_BIG FFERRTAG('H','M','M','M')
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struct thumb_frame {
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AVFrame *frame;
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int *hist;
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};
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typedef struct ThumbContext {
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int n, max_frames;
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struct thumb_frame *frames;
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double *median;
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const AVPixFmtDescriptor *desc;
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size_t hist_size;
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} ThumbContext;
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int allocate_format_context(AVFormatContext **fmt_ctx);
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int create_format_context(AVFormatContext *fmt_ctx, void* opaque, int callbacks);
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void free_format_context(AVFormatContext *fmt_ctx);
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void get_metadata(AVFormatContext *fmt_ctx, char **artist, char **title);
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int find_streams(AVFormatContext *fmt_ctx, AVStream **video_stream, int *orientation);
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int create_codec_context(AVStream *video_stream, AVCodecContext **dec_ctx);
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AVFrame *convert_frame_to_rgb(AVFrame *frame, int alpha);
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AVPacket create_packet();
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int
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obtain_next_frame(AVFormatContext *fmt_ctx, AVCodecContext *dec_ctx, int stream_index, AVPacket *pkt, AVFrame **frame);
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int64_t find_duration(AVFormatContext *fmt_ctx);
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ThumbContext *create_thumb_context(AVStream *stream, AVFrame *frame);
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void free_thumb_context(ThumbContext *thumb_ctx);
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int find_best_frame_index(ThumbContext *thumb_ctx);
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AVFrame *select_frame(ThumbContext *thumb_ctx, int i);
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void populate_histogram(ThumbContext *thumb_ctx, int n, AVFrame *frame);
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extern int goPacketRead(void *opaque, uint8_t *buf, int buf_size);
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extern int64_t goPacketSeek(void *opaque, int64_t seek, int whence);
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extern int goInterrupt(void *opaque);
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