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Diffstat (limited to 'src/libffmpeg/libavcodec/ratecontrol.c')
-rw-r--r--src/libffmpeg/libavcodec/ratecontrol.c214
1 files changed, 119 insertions, 95 deletions
diff --git a/src/libffmpeg/libavcodec/ratecontrol.c b/src/libffmpeg/libavcodec/ratecontrol.c
index f4f433add..d96c837e6 100644
--- a/src/libffmpeg/libavcodec/ratecontrol.c
+++ b/src/libffmpeg/libavcodec/ratecontrol.c
@@ -3,18 +3,20 @@
*
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -25,7 +27,9 @@
#include "avcodec.h"
#include "dsputil.h"
+#include "ratecontrol.h"
#include "mpegvideo.h"
+#include "eval.h"
#undef NDEBUG // allways check asserts, the speed effect is far too small to disable them
#include <assert.h>
@@ -44,12 +48,70 @@ void ff_write_pass1_stats(MpegEncContext *s){
s->f_code, s->b_code, s->current_picture.mc_mb_var_sum, s->current_picture.mb_var_sum, s->i_count, s->skip_count, s->header_bits);
}
+static inline double qp2bits(RateControlEntry *rce, double qp){
+ if(qp<=0.0){
+ av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");
+ }
+ return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;
+}
+
+static inline double bits2qp(RateControlEntry *rce, double bits){
+ if(bits<0.9){
+ av_log(NULL, AV_LOG_ERROR, "bits<0.9\n");
+ }
+ return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;
+}
+
int ff_rate_control_init(MpegEncContext *s)
{
RateControlContext *rcc= &s->rc_context;
int i;
+ char *error = NULL;
+ static const char *const_names[]={
+ "PI",
+ "E",
+ "iTex",
+ "pTex",
+ "tex",
+ "mv",
+ "fCode",
+ "iCount",
+ "mcVar",
+ "var",
+ "isI",
+ "isP",
+ "isB",
+ "avgQP",
+ "qComp",
+/* "lastIQP",
+ "lastPQP",
+ "lastBQP",
+ "nextNonBQP",*/
+ "avgIITex",
+ "avgPITex",
+ "avgPPTex",
+ "avgBPTex",
+ "avgTex",
+ NULL
+ };
+ static double (*func1[])(void *, double)={
+ (void *)bits2qp,
+ (void *)qp2bits,
+ NULL
+ };
+ static const char *func1_names[]={
+ "bits2qp",
+ "qp2bits",
+ NULL
+ };
emms_c();
+ rcc->rc_eq_eval = ff_parse(s->avctx->rc_eq, const_names, func1, func1_names, NULL, NULL, &error);
+ if (!rcc->rc_eq_eval) {
+ av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\": %s\n", s->avctx->rc_eq, error? error : "");
+ return -1;
+ }
+
for(i=0; i<5; i++){
rcc->pred[i].coeff= FF_QP2LAMBDA * 7.0;
rcc->pred[i].count= 1.0;
@@ -191,6 +253,7 @@ void ff_rate_control_uninit(MpegEncContext *s)
RateControlContext *rcc= &s->rc_context;
emms_c();
+ ff_eval_free(rcc->rc_eq_eval);
av_freep(&rcc->entry);
#ifdef CONFIG_XVID
@@ -199,20 +262,6 @@ void ff_rate_control_uninit(MpegEncContext *s)
#endif
}
-static inline double qp2bits(RateControlEntry *rce, double qp){
- if(qp<=0.0){
- av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;
-}
-
-static inline double bits2qp(RateControlEntry *rce, double bits){
- if(bits<0.9){
- av_log(NULL, AV_LOG_ERROR, "bits<0.9\n");
- }
- return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;
-}
-
int ff_vbv_update(MpegEncContext *s, int frame_size){
RateControlContext *rcc= &s->rc_context;
const double fps= 1/av_q2d(s->avctx->time_base);
@@ -287,45 +336,12 @@ static double get_qscale(MpegEncContext *s, RateControlEntry *rce, double rate_f
(rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type],
0
};
- static const char *const_names[]={
- "PI",
- "E",
- "iTex",
- "pTex",
- "tex",
- "mv",
- "fCode",
- "iCount",
- "mcVar",
- "var",
- "isI",
- "isP",
- "isB",
- "avgQP",
- "qComp",
-/* "lastIQP",
- "lastPQP",
- "lastBQP",
- "nextNonBQP",*/
- "avgIITex",
- "avgPITex",
- "avgPPTex",
- "avgBPTex",
- "avgTex",
- NULL
- };
- static double (*func1[])(void *, double)={
- (void *)bits2qp,
- (void *)qp2bits,
- NULL
- };
- static const char *func1_names[]={
- "bits2qp",
- "qp2bits",
- NULL
- };
- bits= ff_eval(s->avctx->rc_eq, const_values, const_names, func1, func1_names, NULL, NULL, rce);
+ bits= ff_parse_eval(rcc->rc_eq_eval, const_values, rce);
+ if (isnan(bits)) {
+ av_log(s->avctx, AV_LOG_ERROR, "Error evaluating rc_eq \"%s\"\n", s->avctx->rc_eq);
+ return -1;
+ }
rcc->pass1_rc_eq_output_sum+= bits;
bits*=rate_factor;
@@ -363,7 +379,7 @@ static double get_diff_limited_q(MpegEncContext *s, RateControlEntry *rce, doubl
const double last_non_b_q= rcc->last_qscale_for[rcc->last_non_b_pict_type];
if (pict_type==I_TYPE && (a->i_quant_factor>0.0 || rcc->last_non_b_pict_type==P_TYPE))
- q= last_p_q *ABS(a->i_quant_factor) + a->i_quant_offset;
+ q= last_p_q *FFABS(a->i_quant_factor) + a->i_quant_offset;
else if(pict_type==B_TYPE && a->b_quant_factor>0.0)
q= last_non_b_q* a->b_quant_factor + a->b_quant_offset;
@@ -394,11 +410,11 @@ static void get_qminmax(int *qmin_ret, int *qmax_ret, MpegEncContext *s, int pic
assert(qmin <= qmax);
if(pict_type==B_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
+ qmin= (int)(qmin*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
+ qmax= (int)(qmax*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);
}else if(pict_type==I_TYPE){
- qmin= (int)(qmin*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
- qmax= (int)(qmax*ABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
+ qmin= (int)(qmin*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
+ qmax= (int)(qmax*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
}
qmin= clip(qmin, 1, FF_LAMBDA_MAX);
@@ -726,6 +742,8 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
rate_factor= rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum * br_compensation;
q= get_qscale(s, rce, rate_factor, picture_number);
+ if (q < 0)
+ return -1;
assert(q>0.0);
//printf("%f ", q);
@@ -790,12 +808,10 @@ static int init_pass2(MpegEncContext *s)
{
RateControlContext *rcc= &s->rc_context;
AVCodecContext *a= s->avctx;
- int i;
+ int i, toobig;
double fps= 1/av_q2d(s->avctx->time_base);
double complexity[5]={0,0,0,0,0}; // aproximate bits at quant=1
- double avg_quantizer[5];
uint64_t const_bits[5]={0,0,0,0,0}; // quantizer idependant bits
- uint64_t available_bits[5];
uint64_t all_const_bits;
uint64_t all_available_bits= (uint64_t)(s->bit_rate*(double)rcc->num_entries/fps);
double rate_factor=0;
@@ -803,7 +819,7 @@ static int init_pass2(MpegEncContext *s)
//int last_i_frame=-10000000;
const int filter_size= (int)(a->qblur*4) | 1;
double expected_bits;
- double *qscale, *blured_qscale;
+ double *qscale, *blured_qscale, qscale_sum;
/* find complexity & const_bits & decide the pict_types */
for(i=0; i<rcc->num_entries; i++){
@@ -821,37 +837,13 @@ static int init_pass2(MpegEncContext *s)
all_const_bits= const_bits[I_TYPE] + const_bits[P_TYPE] + const_bits[B_TYPE];
if(all_available_bits < all_const_bits){
- av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is to low\n");
+ av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is too low\n");
return -1;
}
- /* find average quantizers */
- avg_quantizer[P_TYPE]=0;
- for(step=256*256; step>0.0000001; step*=0.5){
- double expected_bits=0;
- avg_quantizer[P_TYPE]+= step;
-
- avg_quantizer[I_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->i_quant_factor) + s->avctx->i_quant_offset;
- avg_quantizer[B_TYPE]= avg_quantizer[P_TYPE]*ABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset;
-
- expected_bits=
- + all_const_bits
- + complexity[I_TYPE]/avg_quantizer[I_TYPE]
- + complexity[P_TYPE]/avg_quantizer[P_TYPE]
- + complexity[B_TYPE]/avg_quantizer[B_TYPE];
-
- if(expected_bits < all_available_bits) avg_quantizer[P_TYPE]-= step;
-//printf("%f %lld %f\n", expected_bits, all_available_bits, avg_quantizer[P_TYPE]);
- }
-//printf("qp_i:%f, qp_p:%f, qp_b:%f\n", avg_quantizer[I_TYPE],avg_quantizer[P_TYPE],avg_quantizer[B_TYPE]);
-
- for(i=0; i<5; i++){
- available_bits[i]= const_bits[i] + complexity[i]/avg_quantizer[i];
- }
-//printf("%lld %lld %lld %lld\n", available_bits[I_TYPE], available_bits[P_TYPE], available_bits[B_TYPE], all_available_bits);
-
qscale= av_malloc(sizeof(double)*rcc->num_entries);
blured_qscale= av_malloc(sizeof(double)*rcc->num_entries);
+ toobig = 0;
for(step=256*256; step>0.0000001; step*=0.5){
expected_bits=0;
@@ -905,14 +897,46 @@ static int init_pass2(MpegEncContext *s)
expected_bits += bits;
}
-// printf("%f %d %f\n", expected_bits, (int)all_available_bits, rate_factor);
- if(expected_bits > all_available_bits) rate_factor-= step;
+ /*
+ av_log(s->avctx, AV_LOG_INFO,
+ "expected_bits: %f all_available_bits: %d rate_factor: %f\n",
+ expected_bits, (int)all_available_bits, rate_factor);
+ */
+ if(expected_bits > all_available_bits) {
+ rate_factor-= step;
+ ++toobig;
+ }
}
av_free(qscale);
av_free(blured_qscale);
- if(fabs(expected_bits/all_available_bits - 1.0) > 0.01 ){
- av_log(s->avctx, AV_LOG_ERROR, "Error: 2pass curve failed to converge\n");
+ /* check bitrate calculations and print info */
+ qscale_sum = 0.0;
+ for(i=0; i<rcc->num_entries; i++){
+ /* av_log(s->avctx, AV_LOG_DEBUG, "[lavc rc] entry[%d].new_qscale = %.3f qp = %.3f\n",
+ i, rcc->entry[i].new_qscale, rcc->entry[i].new_qscale / FF_QP2LAMBDA); */
+ qscale_sum += clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, s->avctx->qmin, s->avctx->qmax);
+ }
+ assert(toobig <= 40);
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "[lavc rc] requested bitrate: %d bps expected bitrate: %d bps\n",
+ s->bit_rate,
+ (int)(expected_bits / ((double)all_available_bits/s->bit_rate)));
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "[lavc rc] estimated target average qp: %.3f\n",
+ (float)qscale_sum / rcc->num_entries);
+ if (toobig == 0) {
+ av_log(s->avctx, AV_LOG_INFO,
+ "[lavc rc] Using all of requested bitrate is not "
+ "necessary for this video with these parameters.\n");
+ } else if (toobig == 40) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "[lavc rc] Error: bitrate too low for this video "
+ "with these parameters.\n");
+ return -1;
+ } else if (fabs(expected_bits/all_available_bits - 1.0) > 0.01) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "[lavc rc] Error: 2pass curve failed to converge\n");
return -1;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 15:59:03 +0000