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use lagrange multipler instead of qp for ratecontrol, this may break some things, tell me ASAP if u notice anything broken

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quality which was 1..31 float is now a 1..FF_LAMBDA_MAX int, and FF_QP2LAMBDA * qp can be used to convert to the new range

Originally committed as revision 2348 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-10-07 11:32:40 +00:00
parent 7238579835
commit 158c7f059c
10 changed files with 125 additions and 96 deletions
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31
libavcodec/avcodec.h
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@@ -15,7 +15,7 @@ extern "C" {
#define FFMPEG_VERSION_INT 0x000408
#define FFMPEG_VERSION "0.4.8"
#define LIBAVCODEC_BUILD 4683
#define LIBAVCODEC_BUILD 4684
#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVCODEC_VERSION FFMPEG_VERSION
@@ -316,15 +316,15 @@ static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
int display_picture_number;\
\
/**\
* quality (between 1 (good) and 31 (bad)) \
* quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
float quality; \
int quality; \
\
/**\
* buffer age (1->was last buffer and dint change, 2->..., ...).\
* set to something large if the buffer has not been used yet \
* set to INT_MAX if the buffer has not been used yet \
* - encoding: unused\
* - decoding: MUST be set by get_buffer()\
*/\
@@ -1181,8 +1181,13 @@ typedef struct AVCodecContext {
* Dont touch, used by lavc default_get_buffer()
*/
void *internal_buffer;
#define FF_QUALITY_SCALE 256
#define FF_LAMBDA_SHIFT 7
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
#define FF_LAMBDA_MAX (256*128-1)
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
/**
* global quality for codecs which cannot change it per frame.
* this should be proportional to MPEG1/2/4 qscale.
@@ -1263,6 +1268,20 @@ typedef struct AVCodecContext {
* - decoding: unused
*/
int scenechange_threshold;
/**
* minimum lagrange multipler
* - encoding: set by user.
* - decoding: unused
*/
int lmin;
/**
* maximum lagrange multipler
* - encoding: set by user.
* - decoding: unused
*/
int lmax;
} AVCodecContext;