Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 177 insertions, 0 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
new file mode 100644
index 0000000000..8516d2a176
--- /dev/null
+++ b/libavcodec/avcodec.h
@@ -0,0 +1,177 @@
+#include "common.h"
+
+enum CodecID {
+    CODEC_ID_NONE, 
+    CODEC_ID_MPEG1VIDEO,
+    CODEC_ID_H263,
+    CODEC_ID_RV10,
+    CODEC_ID_MP2,
+    CODEC_ID_AC3,
+    CODEC_ID_MJPEG,
+    CODEC_ID_OPENDIVX,
+    CODEC_ID_PCM,
+    CODEC_ID_RAWVIDEO,
+    CODEC_ID_MSMPEG4,
+    CODEC_ID_H263P,
+    CODEC_ID_H263I,
+};
+
+enum CodecType {
+    CODEC_TYPE_VIDEO,
+    CODEC_TYPE_AUDIO,
+};
+
+enum PixelFormat {
+    PIX_FMT_YUV420P,
+    PIX_FMT_YUV422,
+    PIX_FMT_RGB24,
+    PIX_FMT_BGR24,
+};
+
+/* in bytes */
+#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
+
+/* motion estimation type */
+extern int motion_estimation_method;
+#define ME_ZERO   0
+#define ME_FULL   1
+#define ME_LOG    2
+#define ME_PHODS  3
+
+/* encoding support */
+
+#define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
+#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
+
+#define FRAME_RATE_BASE 10000
+
+typedef struct AVCodecContext {
+    int bit_rate;
+    int flags;
+    int sub_id;    /* some codecs needs additionnal format info. It is
+                      stored there */
+    /* video only */
+    int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
+    int width, height;
+    int gop_size; /* 0 = intra only */
+    int pix_fmt;  /* pixel format, see PIX_FMT_xxx */
+    /* audio only */
+    int sample_rate; /* samples per sec */
+    int channels;
+
+    /* the following data should not be initialized */
+    int frame_size; /* in samples, initialized when calling 'init' */
+    int frame_number; /* audio or video frame number */
+    int key_frame;    /* true if the previous compressed frame was 
+                         a key frame (intra, or seekable) */
+    int quality;      /* quality of the previous encoded frame 
+                         (between 1 (good) and 31 (bad)) */
+    struct AVCodec *codec;
+    void *priv_data;
+
+    /* the following fields are ignored */
+    char codec_name[32];
+    int codec_type; /* see CODEC_TYPE_xxx */
+    int codec_id; /* see CODEC_ID_xxx */
+    unsigned int codec_tag;  /* codec tag, only used if unknown codec */
+} AVCodecContext;
+
+typedef struct AVCodec {
+    char *name;
+    int type;
+    int id;
+    int priv_data_size;
+    int (*init)(AVCodecContext *);
+    int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
+    int (*close)(AVCodecContext *);
+    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, 
+                  UINT8 *buf, int buf_size);
+    struct AVCodec *next;
+} AVCodec;
+
+/* three components are given, that's all */
+typedef struct AVPicture {
+    UINT8 *data[3];
+    int linesize[3];
+} AVPicture;
+
+extern AVCodec ac3_encoder;
+extern AVCodec mp2_encoder;
+extern AVCodec mpeg1video_encoder;
+extern AVCodec h263_encoder;
+extern AVCodec h263p_encoder;
+extern AVCodec rv10_encoder;
+extern AVCodec mjpeg_encoder;
+extern AVCodec opendivx_encoder;
+extern AVCodec msmpeg4_encoder;
+
+extern AVCodec h263_decoder;
+extern AVCodec opendivx_decoder;
+extern AVCodec msmpeg4_decoder;
+extern AVCodec mpeg_decoder;
+extern AVCodec h263i_decoder;
+extern AVCodec rv10_decoder;
+
+/* dummy raw codecs */
+extern AVCodec pcm_codec;
+extern AVCodec rawvideo_codec;
+
+/* the following codecs use external GPL libs */
+extern AVCodec mp3_decoder;
+extern AVCodec ac3_decoder;
+
+/* resample.c */
+
+struct ReSampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
+
+ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
+                                     int output_rate, int input_rate);
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+void audio_resample_close(ReSampleContext *s);
+
+/* YUV420 format is assumed ! */
+
+struct ImgReSampleContext;
+
+typedef struct ImgReSampleContext ImgReSampleContext;
+
+ImgReSampleContext *img_resample_init(int output_width, int output_height,
+                                      int input_width, int input_height);
+void img_resample(ImgReSampleContext *s, 
+                  AVPicture *output, AVPicture *input);
+
+void img_resample_close(ImgReSampleContext *s);
+
+int img_convert_to_yuv420(UINT8 *img_out, UINT8 *img, 
+                          int pix_fmt, int width, int height);
+
+/* external high level API */
+
+extern AVCodec *first_avcodec;
+
+void avcodec_init(void);
+
+void register_avcodec(AVCodec *format);
+AVCodec *avcodec_find_encoder(enum CodecID id);
+AVCodec *avcodec_find_decoder(enum CodecID id);
+AVCodec *avcodec_find_decoder_by_name(const char *name);
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+
+int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
+int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples, 
+                         int *frame_size_ptr,
+                         UINT8 *buf, int buf_size);
+int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture, 
+                         int *got_picture_ptr,
+                         UINT8 *buf, int buf_size);
+int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
+                         const short *samples);
+int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
+                         const AVPicture *pict);
+
+int avcodec_close(AVCodecContext *avctx);
+
+void avcodec_register_all(void);
+void avcodec_register_more(void);