[SCM] libav/experimental: slice encoding cleanup
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:33:44 UTC 2013
The following commit has been merged in the experimental branch:
commit 945eeee15edf918564904947521c90a8d7d5b0c5
Author: Michael Niedermayer <michaelni at gmx.at>
Date: Fri Oct 25 00:08:32 2002 +0000
slice encoding cleanup
Originally committed as revision 1069 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index dfcc0b5..09049c1 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -222,51 +222,25 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
}
}
+/**
+ * Encodes a group of blocks header.
+ */
int h263_encode_gob_header(MpegEncContext * s, int mb_line)
{
- int pdif=0;
-
- /* Check to see if we need to put a new GBSC */
- /* for RTP packetization */
- if (s->rtp_mode) {
- pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
- if (pdif >= s->rtp_payload_size) {
- /* Bad luck, packet must be cut before */
- align_put_bits(&s->pb);
- flush_put_bits(&s->pb);
- /* Call the RTP callback to send the last GOB */
- if (s->rtp_callback) {
- pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
- s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
- }
- s->ptr_lastgob = pbBufPtr(&s->pb);
- put_bits(&s->pb, 17, 1); /* GBSC */
- s->gob_number = mb_line / s->gob_index;
- put_bits(&s->pb, 5, s->gob_number); /* GN */
- put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */
- put_bits(&s->pb, 5, s->qscale); /* GQUANT */
- //fprintf(stderr,"\nGOB: %2d size: %d", s->gob_number - 1, pdif);
- return pdif;
- } else if (pdif + s->mb_line_avgsize >= s->rtp_payload_size) {
- /* Cut the packet before we can't */
align_put_bits(&s->pb);
flush_put_bits(&s->pb);
/* Call the RTP callback to send the last GOB */
if (s->rtp_callback) {
- pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
+ int pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
}
- s->ptr_lastgob = pbBufPtr(&s->pb);
put_bits(&s->pb, 17, 1); /* GBSC */
s->gob_number = mb_line / s->gob_index;
put_bits(&s->pb, 5, s->gob_number); /* GN */
put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */
put_bits(&s->pb, 5, s->qscale); /* GQUANT */
//fprintf(stderr,"\nGOB: %2d size: %d", s->gob_number - 1, pdif);
- return pdif;
- }
- }
- return 0;
+ return 0;
}
static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], int dir[6])
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index e3fce2a..3e23af8 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -576,8 +576,6 @@ int MPV_encode_init(AVCodecContext *avctx)
break;
case CODEC_ID_H263P:
s->out_format = FMT_H263;
- s->rtp_mode = 1;
- s->rtp_payload_size = 1200;
s->h263_plus = 1;
s->unrestricted_mv = 1;
s->h263_aic = 1;
@@ -2475,7 +2473,7 @@ static inline void encode_mb_hq(MpegEncContext *s, MpegEncContext *backup, MpegE
static void encode_picture(MpegEncContext *s, int picture_number)
{
- int mb_x, mb_y, last_gob, pdif = 0;
+ int mb_x, mb_y, pdif = 0;
int i;
int bits;
MpegEncContext best_s, backup_s;
@@ -2657,10 +2655,8 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->last_mv[0][0][0] = 0;
s->last_mv[0][0][1] = 0;
- if (s->codec_id==CODEC_ID_H263 && s->codec_id==CODEC_ID_H263)
+ if (s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P)
s->gob_index = ff_h263_get_gob_height(s);
- else
- s->gob_index = 1; //FIXME remove
if(s->codec_id==CODEC_ID_MPEG4 && s->partitioned_frame)
ff_mpeg4_init_partitions(s);
@@ -2668,26 +2664,9 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->resync_mb_x=0;
s->resync_mb_y=0;
s->first_slice_line = 1;
+ s->ptr_lastgob = s->pb.buf;
+ s->ptr_last_mb_line = s->pb.buf;
for(mb_y=0; mb_y < s->mb_height; mb_y++) {
- /* Put GOB header based on RTP MTU for formats which support it per line (H263*)*/
- /* TODO: Put all this stuff in a separate generic function */
- if (s->rtp_mode) {
- if (!mb_y) {
- s->ptr_lastgob = s->pb.buf;
- s->ptr_last_mb_line = s->pb.buf;
- } else if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4 && !(mb_y % s->gob_index)) {
- // MN: we could move the space check from h263 -> here, as its not h263 specific
- last_gob = h263_encode_gob_header(s, mb_y);
- if (last_gob) {
- s->first_slice_line = 1;
- }else{
- /*MN: we reset it here instead at the end of each line cuz mpeg4 can have
- slice lines starting & ending in the middle*/
- s->first_slice_line = 0;
- }
- }
- }
-
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
@@ -2711,14 +2690,18 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
-//printf("%d %d %d %d %d\n", s->mb_x, s->mb_y, s->resync_mb_x, s->resync_mb_y, s->first_slice_line);
- /* write gob / video packet header for formats which support it at any MB (MPEG4) */
- if(s->rtp_mode && s->mb_y>0 && s->codec_id==CODEC_ID_MPEG4){
- int pdif= pbBufPtr(&s->pb) - s->ptr_lastgob;
-
- //the *2 is there so we stay below the requested size
- if(pdif + s->mb_line_avgsize/s->mb_width >= s->rtp_payload_size){
- if(s->codec_id==CODEC_ID_MPEG4){
+
+ /* write gob / video packet header */
+ if(s->rtp_mode){
+ int current_packet_size, is_gob_start;
+
+ current_packet_size= pbBufPtr(&s->pb) - s->ptr_lastgob;
+ is_gob_start=0;
+
+ if(s->codec_id==CODEC_ID_MPEG4){
+ if(current_packet_size + s->mb_line_avgsize/s->mb_width >= s->rtp_payload_size
+ && s->mb_y + s->mb_x>0){
+
if(s->partitioned_frame){
ff_mpeg4_merge_partitions(s);
ff_mpeg4_init_partitions(s);
@@ -2731,7 +2714,18 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->last_bits= bits;
}
ff_mpeg4_clean_buffers(s);
+ is_gob_start=1;
}
+ }else{
+ if(current_packet_size + s->mb_line_avgsize*s->gob_index >= s->rtp_payload_size
+ && s->mb_x==0 && s->mb_y>0 && s->mb_y%s->gob_index==0){
+
+ h263_encode_gob_header(s, mb_y);
+ is_gob_start=1;
+ }
+ }
+
+ if(is_gob_start){
s->ptr_lastgob = pbBufPtr(&s->pb);
s->first_slice_line=1;
s->resync_mb_x=mb_x;
@@ -2925,17 +2919,14 @@ static void encode_picture(MpegEncContext *s, int picture_number)
}
- /* Obtain average GOB size for RTP */
+ /* Obtain average mb_row size for RTP */
if (s->rtp_mode) {
- if (!mb_y)
+ if (mb_y==0)
s->mb_line_avgsize = pbBufPtr(&s->pb) - s->ptr_last_mb_line;
- else if (!(mb_y % s->gob_index)) {
+ else {
s->mb_line_avgsize = (s->mb_line_avgsize + pbBufPtr(&s->pb) - s->ptr_last_mb_line) >> 1;
- s->ptr_last_mb_line = pbBufPtr(&s->pb);
}
- //fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y,
- // (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
- if(s->codec_id!=CODEC_ID_MPEG4) s->first_slice_line = 0; //FIXME clean
+ s->ptr_last_mb_line = pbBufPtr(&s->pb);
}
}
emms_c();
--
Libav/FFmpeg packaging
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