diff options
-rw-r--r-- | libavcodec/avcodec.h | 37 | ||||
-rw-r--r-- | libavcodec/opts.c | 77 |
2 files changed, 113 insertions, 1 deletions
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index ae96558..fd7eafb 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -1109,6 +1109,41 @@ void avcodec_register_all(void); void avcodec_flush_buffers(AVCodecContext *avctx); +typedef struct { + /** options' name with default value*/ + const char* name; + /** English text help */ + const char* help; + /** type of variable */ + int type; +#define FF_CONF_TYPE_BOOL 1 // boolean - true,1,on (or simply presence) +#define FF_CONF_TYPE_DOUBLE 2 // double +#define FF_CONF_TYPE_INT 3 // integer +#define FF_CONF_TYPE_STRING 4 // string (finished with \0) +#define FF_CONF_TYPE_MASK 0x1f // mask for types - upper bits are various flags +#define FF_CONF_TYPE_EXPERT 0x20 // flag for expert option +#define FF_CONF_TYPE_FLAG (FF_CONF_TYPE_BOOL | 0x40) +#define FF_CONF_TYPE_RCOVERIDE (FF_CONF_TYPE_STRING | 0x80) + /** where the parsed value should be stored */ + void* val; + /** min value (min == max -> no limits) */ + double min; + /** maximum value for double/int */ + double max; + /** default boo [0,1]l/double/int value */ + double defval; + /** + * default string value (with optional semicolon delimited extra option-list + * i.e. option1;option2;option3 + * defval might select other then first argument as default + */ + const char* defstr; + /** char* list of supported codecs (i.e. ",msmpeg4,h263," NULL - everything */ + const char* supported; +} avc_config_t; + +void avcodec_getopt(AVCodecContext* avctx, char* str, avc_config_t** config); + /** * Interface for 0.5.0 version * @@ -1193,7 +1228,7 @@ void __av_freep(void **ptr); #define av_freep(p) __av_freep((void **)(p)) /* for static data only */ /* call av_free_static to release all staticaly allocated tables */ -void av_free_static(); +void av_free_static(void); void *__av_mallocz_static(void** location, unsigned int size); #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s) diff --git a/libavcodec/opts.c b/libavcodec/opts.c new file mode 100644 index 0000000..bcefc40 --- /dev/null +++ b/libavcodec/opts.c @@ -0,0 +1,77 @@ +/* + * LGPL + */ + +/* + * typical parsed command line: + * msmpeg4:bitrate=720000:qmax=16 + * + */ + +#include "avcodec.h" + +/* + * possible extension - use for decoder options + * - for given codec names filter only correct + * options given (could be passed with 'str') + */ + +/** + * \param avctx where to store parsed results + * \param str string with options for parsing + * \param config allocated avc_config_t for external parsing + * i.e. external program might learn about all available + * options for given codec + **/ +void avcodec_getopt(AVCodecContext* avctx, char* str, avc_config_t** config) +{ + AVCodecContext avctx_tmp; + AVCodecContext* ctx = (avctx) ? avctx : &avctx_tmp; + static const char* class_h263 = ",msmpeg4,"; + //"huffyuv,wmv1,msmpeg4v2,msmpeg4,mpeg4,mpeg1,mpeg1video,mjpeg,rv10,h263,h263p" + + avc_config_t cnf[] = + { + // FIXME: sorted by importance!!! + // expert option should follow more common ones + { + "bitrate", "desired video bitrate", + FF_CONF_TYPE_INT, &ctx->bit_rate, 4, 240000000, 800000, NULL, class_h263 + }, { + "vhq", "very high quality", + FF_CONF_TYPE_FLAG, &ctx->flags, 0, CODEC_FLAG_HQ, 0, NULL, class_h263 + }, { + "ratetol", "number of bits the bitstream is allowed to diverge from the reference" + "the reference can be CBR (for CBR pass1) or VBR (for pass2)", + FF_CONF_TYPE_INT, &ctx->bit_rate_tolerance, 4, 240000000, 8000, NULL, class_h263 + }, { + "qmin", "minimum quantizer", FF_CONF_TYPE_INT, &ctx->qmin, 1, 31, 2, NULL, class_h263 + }, { + "qmax", "maximum qunatizer", FF_CONF_TYPE_INT, &ctx->qmax, 1, 31, 31, NULL, class_h263 + }, { + "rc_eq", "rate control equation", + FF_CONF_TYPE_STRING, &ctx->rc_eq, 0, 0, 0, "tex^qComp" /* FILLME options */, class_h263 + }, { + "rc_minrate", "rate control minimum bitrate", + FF_CONF_TYPE_INT, &ctx->rc_min_rate, 4, 24000000, 0, NULL, class_h263 + }, { + "rc_maxrate", "rate control maximum bitrate", + FF_CONF_TYPE_INT, &ctx->rc_max_rate, 4, 24000000, 0, NULL, class_h263 + }, { + "psnr", "calculate PSNR of compressed frames", + FF_CONF_TYPE_FLAG, &ctx->flags, 0, CODEC_FLAG_PSNR, 0, NULL, class_h263 + }, { + "rc_override", "ratecontrol override (=startframe,endframe,qscale,quality_factor)", + FF_CONF_TYPE_RCOVERIDE, &ctx->rc_override, 0, 0, 0, NULL, class_h263 + }, + + { NULL, NULL, 0, NULL, 0, 0, 0, NULL, NULL } + }; + + if (config) + { + *config = malloc(sizeof(cnf)); + if (*config) + memcpy(*config, cnf, sizeof(cnf)); + } +} |