#ifndef AVCODEC_H #define AVCODEC_H /** * @file avcodec.h * external api header. */ #ifdef __cplusplus extern "C" { #endif #include "_stdint.h" #include /* size_t */ #define FFMPEG_VERSION_INT 0x000409 #define FFMPEG_VERSION "0.4.9-pre1" #define LIBAVCODEC_BUILD 4728 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT #define LIBAVCODEC_VERSION FFMPEG_VERSION #define AV_STRINGIFY(s) AV_TOSTRING(s) #define AV_TOSTRING(s) #s #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD) enum CodecType { CODEC_TYPE_UNKNOWN = -1, CODEC_TYPE_VIDEO, CODEC_TYPE_AUDIO, CODEC_TYPE_DATA, }; /* * Pixel format. Notes: * * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA * color is put together as: * (A << 24) | (R << 16) | (G << 8) | B * This is stored as BGRA on little endian CPU architectures and ARGB on * big endian CPUs. * * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized * image data is stored in AVFrame.data[0]. The palette is transported in * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is * also endian-specific). Note also that the individual RGB palette * components stored in AVFrame.data[1] should be in the range 0..255. * This is important as many custom PAL8 video codecs that were designed * to run on the IBM VGA graphics adapter use 6-bit palette components. */ enum PixelFormat { PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples) (I420) PIX_FMT_YVU420P, ///< Planar YUV 4:2:0 (1 Cb & Cr sample per 2x2 Y samples) (YV12) PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB... PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR... PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples) PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples) PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness PIX_FMT_BGRA32, ///< Packed pixel, 4 bytes per pixel, ARGBARGB... PIX_FMT_RGB32, ///< Packed pixel, 4 bytes per pixel, BGRXBGRX..., stored in cpu endianness PIX_FMT_BGR32, ///< Packed pixel, 4 bytes per pixel, XRGBXRGB... PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples) PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples) PIX_FMT_RGB565, ///< always stored in cpu endianness PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1 PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, ///< 0 is white PIX_FMT_MONOBLACK, ///< 0 is black PIX_FMT_PAL8, ///< 8 bit with RGBA palette PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg) PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg) PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg) PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h) PIX_FMT_XVMC_MPEG2_IDCT, PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3 PIX_FMT_AYUV4444, ///< Packed pixel, A0 Y0 Cb Cr PIX_FMT_NB }; /* currently unused, may be used if 24/32 bits samples ever supported */ enum SampleFormat { SAMPLE_FMT_S16 = 0, ///< signed 16 bits }; #define DEFAULT_FRAME_RATE_BASE 1001000 /* thomas: extracted from imgconvert.c since it's also used in * gstffmpegcodecmap.c */ /* start of extract */ #define FF_COLOR_RGB 0 /* RGB color space */ #define FF_COLOR_GRAY 1 /* gray color space */ #define FF_COLOR_YUV 2 /* YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */ #define FF_COLOR_YUV_JPEG 3 /* YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */ #define FF_PIXEL_PLANAR 0 /* each channel has one component in AVPicture */ #define FF_PIXEL_PACKED 1 /* only one components containing all the channels */ #define FF_PIXEL_PALETTE 2 /* one components containing indexes for a palette */ typedef struct PixFmtInfo { enum PixelFormat format; const char *name; uint8_t nb_channels; /* number of channels (including alpha) */ uint8_t color_type; /* color type (see FF_COLOR_xxx constants) */ uint8_t pixel_type; /* pixel storage type (see FF_PIXEL_xxx constants) */ uint8_t is_alpha:1; /* true if alpha can be specified */ uint8_t x_chroma_shift; /* X chroma subsampling factor is 2 ^ shift */ uint8_t y_chroma_shift; /* Y chroma subsampling factor is 2 ^ shift */ uint8_t depth; /* bit depth of the color components */ } PixFmtInfo; PixFmtInfo * get_pix_fmt_info (enum PixelFormat format); /* end of extract */ /** * main external api structure. */ typedef struct AVCodecContext { /* video only */ /** * frames per sec multiplied by frame_rate_base. * for variable fps this is the precission, so if the timestamps * can be specified in msec precssion then this is 1000*frame_rate_base * - encoding: MUST be set by user * - decoding: set by lavc. 0 or the frame_rate if available */ int frame_rate; /** * picture width / height. * - encoding: MUST be set by user. * - decoding: set by lavc. * Note, for compatibility its possible to set this instead of * coded_width/height before decoding */ int width, height; /** * pixel format, see PIX_FMT_xxx. * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt * conversion is in order. This only works for * codecs with one supported pix_fmt, we should * do something for a generic case as well. * - decoding: set by lavc. */ enum PixelFormat pix_fmt; /* audio only */ int sample_rate; ///< samples per sec int channels; int sample_fmt; ///< sample format, currenly unused /** * Palette control structure * - encoding: ??? (no palette-enabled encoder yet) * - decoding: set by user. */ struct AVPaletteControl *palctrl; /** * frame_rate_base. * for variable fps this is 1 * - encoding: set by user. * - decoding: set by lavc. * @todo move this after frame_rate */ int frame_rate_base; } AVCodecContext; /** * four components are given, that's all. * the last component is alpha */ typedef struct AVPicture { uint8_t *data[4]; int linesize[4]; ///< number of bytes per line } AVPicture; /** * AVPaletteControl * This structure defines a method for communicating palette changes * between and demuxer and a decoder. */ #define AVPALETTE_SIZE 1024 #define AVPALETTE_COUNT 256 typedef struct AVPaletteControl { /* demuxer sets this to 1 to indicate the palette has changed; * decoder resets to 0 */ int palette_changed; /* 4-byte ARGB palette entries, stored in native byte order; note that * the individual palette components should be on a 8-bit scale; if * the palette data comes from a IBM VGA native format, the component * data is probably 6 bits in size and needs to be scaled */ unsigned int palette[AVPALETTE_COUNT]; } AVPaletteControl; int avpicture_get_size(int pix_fmt, int width, int height); void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift); const char *avcodec_get_pix_fmt_name(int pix_fmt); void avcodec_set_dimensions(AVCodecContext *s, int width, int height); enum PixelFormat avcodec_get_pix_fmt(const char* name); #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */ #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */ #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */ #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */ #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */ #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */ int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt, int has_alpha); int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt, int has_alpha, int *loss_ptr); #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */ #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */ int img_get_alpha_info(const AVPicture *src, int pix_fmt, int width, int height); /* convert among pixel formats */ int img_convert(AVPicture *dst, int dst_pix_fmt, const AVPicture *src, int pix_fmt, int width, int height); void avcodec_init(void); void avcodec_get_context_defaults(AVCodecContext *s); AVCodecContext *avcodec_alloc_context(void); /* memory */ void *av_malloc(unsigned int size); void *av_mallocz(unsigned int size); void *av_realloc(void *ptr, unsigned int size); void av_free(void *ptr); char *av_strdup(const char *s); void av_freep(void *ptr); void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size); /* for static data only */ /* call av_free_static to release all staticaly allocated tables */ void av_free_static(void); void *av_mallocz_static(unsigned int size); /* endian macros */ #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32) #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1]) #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \ (((uint8_t*)(x))[1] << 16) | \ (((uint8_t*)(x))[2] << 8) | \ ((uint8_t*)(x))[3]) #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ (((uint8_t*)(x))[2] << 16) | \ (((uint8_t*)(x))[1] << 8) | \ ((uint8_t*)(x))[0]) #endif #ifdef __cplusplus } #endif #endif /* AVCODEC_H */