ffmpeg常见的函数，表，ID整理

1. ffmpeg常见的string处理文件
libavutil/avstring.c

av_strstart   
av_stristart  
av_stristr    
av_strnstr    
av_strlcpy    
av_strlcat    
av_strlcatf   
av_asprintf   
av_d2str      
av_get_token  
av_strtok     
av_strcasecmp 
av_strncasecmp
av_strireplace
av_basename   
av_dirname    

2. ffmpeg中的utils文件

libavformat/utils.c
libavutil/utils.c
libavresample/utils.c
tests/utils.c
libavdevice/utils.c
libswscale/utils.c
libavcodec/utils.c
libavcodec/tests/utils.c

比如avcodec相关的就可以在libavcodec/utils.c中找到：

av_get_profile_name 
avcodec_profile_name
avcodec_get_name

3. codec的描述表
libavcodec/codec_desc.c

static const AVCodecDescriptor codec_descriptors[] = {
{
    .id        = AV_CODEC_ID_H264,
    .type      = AVMEDIA_TYPE_VIDEO,
    .name      = "h264",
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
    .props     = AV_CODEC_PROP_LOSSY | AV_CODEC_PROP_LOSSLESS | AV_CODEC_PROP_REORDER,
    .profiles  = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
},

4. pixformat的描述表

libavutil/pixdesc.c
static const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
    [AV_PIX_FMT_YUV420P] = {
        .name = "yuv420p",
        .nb_components = 3,
        .log2_chroma_w = 1,
        .log2_chroma_h = 1,
        .comp = {
            { 0, 1, 0, 0, 8, 0, 7, 1 },        /* Y */
            { 1, 1, 0, 0, 8, 0, 7, 1 },        /* U */
            { 2, 1, 0, 0, 8, 0, 7, 1 },        /* V */
        },
        .flags = AV_PIX_FMT_FLAG_PLANAR,
    },
    // ...
}；

5. codec id定义
libavcodec/avcodec.h

    AV_CODEC_ID_H261,
    AV_CODEC_ID_H263,
    AV_CODEC_ID_RV10,
    AV_CODEC_ID_RV20,
    AV_CODEC_ID_MJPEG,
    AV_CODEC_ID_MJPEGB,

6. pixel format定义
libavutil/pixfmt.h

enum AVPixelFormat {
    AV_PIX_FMT_NONE = -1,
    AV_PIX_FMT_YUV420P,   ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
    AV_PIX_FMT_YUYV422,   ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
    AV_PIX_FMT_RGB24,     ///< packed RGB 8:8:8, 24bpp, RGBRGB...
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    AV_PIX_FMT_YUV422P,   ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
    AV_PIX_FMT_YUV444P,   ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
    AV_PIX_FMT_YUV410P,   ///< planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples)
    AV_PIX_FMT_YUV411P,   ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
    AV_PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
    // ...
}

7. 注册所有codec
libavcodec/allcodecs.c

static void register_all(void)
{
    /* hardware accelerators */
    REGISTER_HWACCEL(H263_VAAPI,        h263_vaapi);
    REGISTER_HWACCEL(H263_VIDEOTOOLBOX, h263_videotoolbox);
    REGISTER_HWACCEL(H264_CUVID,        h264_cuvid);
    REGISTER_HWACCEL(H264_D3D11VA,      h264_d3d11va);
    REGISTER_HWACCEL(H264_D3D11VA2,     h264_d3d11va2);
    REGISTER_HWACCEL(H264_DXVA2,        h264_dxva2);
    REGISTER_HWACCEL(H264_MEDIACODEC,   h264_mediacodec);
    REGISTER_HWACCEL(H264_MMAL,         h264_mmal);
    REGISTER_HWACCEL(H264_QSV,          h264_qsv);
    REGISTER_HWACCEL(H264_VAAPI,        h264_vaapi);
    REGISTER_HWACCEL(H264_VDA,          h264_vda);
    REGISTER_HWACCEL(H264_VDA_OLD,      h264_vda_old);
    REGISTER_HWACCEL(H264_VDPAU,        h264_vdpau);
    REGISTER_HWACCEL(H264_VIDEOTOOLBOX, h264_videotoolbox);
    // ...
}

8. 注册所有filter
libavfilter/allfilters.c

static void register_all(void)
{
    REGISTER_FILTER(ABENCH,         abench,         af);
    REGISTER_FILTER(ACOMPRESSOR,    acompressor,    af);
    REGISTER_FILTER(ACOPY,          acopy,          af);
    REGISTER_FILTER(ACROSSFADE,     acrossfade,     af);
    REGISTER_FILTER(ACRUSHER,       acrusher,       af);
    REGISTER_FILTER(ADELAY,         adelay,         af);
    REGISTER_FILTER(AECHO,          aecho,          af);
    REGISTER_FILTER(AEMPHASIS,      aemphasis,      af);
    REGISTER_FILTER(AEVAL,          aeval,          af);
    REGISTER_FILTER(AFADE,          afade,          af);
    REGISTER_FILTER(AFFTFILT,       afftfilt,       af);
    // ...
}

9. 注册所有format
libavformat/allformats.c

static void register_all(void)
{
    avcodec_register_all();

    /* (de)muxers */
    REGISTER_MUXER   (A64,              a64);
    REGISTER_DEMUXER (AA,               aa);
    REGISTER_DEMUXER (AAC,              aac);
    REGISTER_MUXDEMUX(AC3,              ac3);
    REGISTER_DEMUXER (ACM,              acm);
    REGISTER_DEMUXER (ACT,              act);
    REGISTER_DEMUXER (ADF,              adf);
    REGISTER_DEMUXER (ADP,              adp);
    REGISTER_DEMUXER (ADS,              ads);
    REGISTER_MUXER   (ADTS,             adts);
    // ...
}