mirror of https://git.ffmpeg.org/ffmpeg.git
206 lines
6.1 KiB
C
206 lines
6.1 KiB
C
#include "common.h"
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enum CodecID {
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CODEC_ID_NONE,
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CODEC_ID_MPEG1VIDEO,
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CODEC_ID_H263,
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CODEC_ID_RV10,
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CODEC_ID_MP2,
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CODEC_ID_AC3,
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CODEC_ID_MJPEG,
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CODEC_ID_MPEG4,
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CODEC_ID_PCM,
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CODEC_ID_RAWVIDEO,
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CODEC_ID_MSMPEG4,
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CODEC_ID_H263P,
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CODEC_ID_H263I,
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};
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enum CodecType {
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CODEC_TYPE_VIDEO,
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CODEC_TYPE_AUDIO,
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};
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enum PixelFormat {
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PIX_FMT_YUV420P,
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PIX_FMT_YUV422,
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PIX_FMT_RGB24,
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PIX_FMT_BGR24,
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PIX_FMT_YUV422P,
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PIX_FMT_YUV444P,
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
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/* motion estimation type */
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extern int motion_estimation_method;
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#define ME_ZERO 0
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#define ME_FULL 1
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#define ME_LOG 2
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#define ME_PHODS 3
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/* encoding support */
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#define CODEC_FLAG_HQ 0x0001 /* high quality (non real time) encoding */
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#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
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/* codec capabilities */
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/* decoder can use draw_horiz_band callback */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
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#define FRAME_RATE_BASE 10000
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typedef struct AVCodecContext {
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int bit_rate;
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int flags;
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int sub_id; /* some codecs needs additionnal format info. It is
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stored there */
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/* video only */
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int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
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int width, height;
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int gop_size; /* 0 = intra only */
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int pix_fmt; /* pixel format, see PIX_FMT_xxx */
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/* if non NULL, 'draw_horiz_band' is called by the libavcodec
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decoder to draw an horizontal band. It improve cache usage. Not
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all codecs can do that. You must check the codec capabilities
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before */
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void (*draw_horiz_band)(struct AVCodecContext *s,
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UINT8 **src_ptr, int linesize,
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int y, int width, int height);
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/* audio only */
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int sample_rate; /* samples per sec */
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int channels;
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/* the following data should not be initialized */
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int frame_size; /* in samples, initialized when calling 'init' */
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int frame_number; /* audio or video frame number */
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int key_frame; /* true if the previous compressed frame was
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a key frame (intra, or seekable) */
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int quality; /* quality of the previous encoded frame
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(between 1 (good) and 31 (bad)) */
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struct AVCodec *codec;
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void *priv_data;
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/* the following fields are ignored */
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void *opaque; /* can be used to carry app specific stuff */
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char codec_name[32];
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int codec_type; /* see CODEC_TYPE_xxx */
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int codec_id; /* see CODEC_ID_xxx */
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unsigned int codec_tag; /* codec tag, only used if unknown codec */
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} AVCodecContext;
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typedef struct AVCodec {
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char *name;
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int type;
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int id;
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int priv_data_size;
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int (*init)(AVCodecContext *);
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int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
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int (*close)(AVCodecContext *);
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int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
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UINT8 *buf, int buf_size);
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int capabilities;
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struct AVCodec *next;
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} AVCodec;
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/* three components are given, that's all */
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typedef struct AVPicture {
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UINT8 *data[3];
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int linesize[3];
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} AVPicture;
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extern AVCodec ac3_encoder;
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extern AVCodec mp2_encoder;
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extern AVCodec mpeg1video_encoder;
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extern AVCodec h263_encoder;
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extern AVCodec h263p_encoder;
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extern AVCodec rv10_encoder;
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extern AVCodec mjpeg_encoder;
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extern AVCodec mpeg4_encoder;
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extern AVCodec msmpeg4_encoder;
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extern AVCodec h263_decoder;
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extern AVCodec mpeg4_decoder;
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extern AVCodec msmpeg4_decoder;
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extern AVCodec mpeg_decoder;
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extern AVCodec h263i_decoder;
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extern AVCodec rv10_decoder;
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extern AVCodec mjpeg_decoder;
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/* dummy raw codecs */
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extern AVCodec pcm_codec;
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extern AVCodec rawvideo_codec;
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/* the following codecs use external GPL libs */
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extern AVCodec mp3_decoder;
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extern AVCodec ac3_decoder;
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/* resample.c */
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struct ReSampleContext;
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typedef struct ReSampleContext ReSampleContext;
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ReSampleContext *audio_resample_init(int output_channels, int input_channels,
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int output_rate, int input_rate);
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int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
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void audio_resample_close(ReSampleContext *s);
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/* YUV420 format is assumed ! */
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struct ImgReSampleContext;
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typedef struct ImgReSampleContext ImgReSampleContext;
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ImgReSampleContext *img_resample_init(int output_width, int output_height,
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int input_width, int input_height);
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void img_resample(ImgReSampleContext *s,
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AVPicture *output, AVPicture *input);
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void img_resample_close(ImgReSampleContext *s);
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void avpicture_fill(AVPicture *picture, UINT8 *ptr,
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int pix_fmt, int width, int height);
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int avpicture_get_size(int pix_fmt, int width, int height);
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/* convert among pixel formats */
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int img_convert(AVPicture *dst, int dst_pix_fmt,
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AVPicture *src, int pix_fmt,
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int width, int height);
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/* deinterlace a picture */
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int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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int pix_fmt, int width, int height);
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/* external high level API */
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extern AVCodec *first_avcodec;
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void avcodec_init(void);
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void register_avcodec(AVCodec *format);
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AVCodec *avcodec_find_encoder(enum CodecID id);
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AVCodec *avcodec_find_decoder(enum CodecID id);
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AVCodec *avcodec_find_decoder_by_name(const char *name);
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void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
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int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
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int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
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int *frame_size_ptr,
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UINT8 *buf, int buf_size);
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int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
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int *got_picture_ptr,
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UINT8 *buf, int buf_size);
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int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
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const short *samples);
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int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
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const AVPicture *pict);
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int avcodec_close(AVCodecContext *avctx);
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void avcodec_register_all(void);
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