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FFmpeg
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Replace buffer by AVPacket and avoid a memcpy() for video when the number 

of allocated slices matches the actual.
Audio still does a copy (marked with FIXME in the code so this is not missed).

Originally committed as revision 16402 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Michael Niedermayer 17 years ago
parent
fce48f5b0b
commit
0b4ff0c9ef
1 changed files with 22 additions and 20 deletions
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  1. +22
    -20
      libavformat/rmdec.c

+ 22
- 20
libavformat/rmdec.c View File

@@ -24,7 +24,7 @@
#include "rm.h"

struct RMStream {
uint8_t *buf; ///< place to store merged video frame / reordered audio data
AVPacket pkt; ///< place to store merged video frame / reordered audio data
int videobufsize; ///< current assembled frame size
int videobufpos; ///< position for the next slice in the video buffer
int curpic_num; ///< picture number of current frame
@@ -80,7 +80,7 @@ RMStream *ff_rm_alloc_rmstream (void)

void ff_rm_free_rmstream (RMStream *rms)
{
av_freep(&rms->buf);
av_free_packet(&rms->pkt);
}

static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
@@ -155,7 +155,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
return -1;
}

ast->buf = av_malloc(ast->audio_framesize * sub_packet_h);
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
} else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
int codecdata_length;
get_be16(pb); get_byte(pb);
@@ -186,7 +186,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
return -1;
}

ast->buf = av_malloc(ast->audio_framesize * sub_packet_h);
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
} else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
int codecdata_length;
get_be16(pb); get_byte(pb);
@@ -521,8 +521,8 @@ static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
vst->slices = ((hdr & 0x3F) << 1) + 1;
vst->videobufsize = len2 + 8*vst->slices + 1;
av_free(vst->buf);
if(!(vst->buf = av_malloc(vst->videobufsize)))
av_free_packet(&vst->pkt); //FIXME this should be output.
if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
return AVERROR(ENOMEM);
vst->videobufpos = 8*vst->slices + 1;
vst->cur_slice = 0;
@@ -534,22 +534,24 @@ static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,

if(++vst->cur_slice > vst->slices)
return 1;
AV_WL32(vst->buf - 7 + 8*vst->cur_slice, 1);
AV_WL32(vst->buf - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
if(vst->videobufpos + len > vst->videobufsize)
return 1;
if (get_buffer(pb, vst->buf + vst->videobufpos, len) != len)
if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
return AVERROR(EIO);
vst->videobufpos += len;
rm->remaining_len-= len;

if(type == 2 || (vst->videobufpos) == vst->videobufsize){
vst->buf[0] = vst->cur_slice-1;
if(av_new_packet(pkt, vst->videobufpos - 8*(vst->slices - vst->cur_slice)) < 0)
return AVERROR(ENOMEM);
memcpy(pkt->data, vst->buf, 1 + 8*vst->cur_slice);
memcpy(pkt->data + 1 + 8*vst->cur_slice, vst->buf + 1 + 8*vst->slices,
vst->pkt.data[0] = vst->cur_slice-1;
*pkt= vst->pkt;
vst->pkt.data=
vst->pkt.size= 0;
if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
vst->videobufpos - 1 - 8*vst->slices);
pkt->size += 8*(vst->cur_slice - vst->slices);
pkt->pts = AV_NOPTS_VALUE;
pkt->pos = vst->pktpos;
return 0;
@@ -604,12 +606,12 @@ ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
switch(st->codec->codec_id) {
case CODEC_ID_RA_288:
for (x = 0; x < h/2; x++)
get_buffer(pb, ast->buf+x*2*w+y*cfs, cfs);
get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
break;
case CODEC_ID_ATRAC3:
case CODEC_ID_COOK:
for (x = 0; x < w/sps; x++)
get_buffer(pb, ast->buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
break;
}

@@ -621,7 +623,7 @@ ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
// Release first audio packet
av_new_packet(pkt, st->codec->block_align);
memcpy(pkt->data, ast->buf, st->codec->block_align);
memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
*timestamp = ast->audiotimestamp;
*flags = 2; // Mark first packet as keyframe
}
@@ -684,7 +686,7 @@ ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
else {
av_new_packet(pkt, st->codec->block_align);
memcpy(pkt->data, ast->buf + st->codec->block_align *
memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
(ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
st->codec->block_align);
}
@@ -718,13 +720,13 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)

for (y = 0; y < ast->sub_packet_h; y++)
for (x = 0; x < ast->sub_packet_h/2; x++)
if (get_buffer(pb, ast->buf+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
if (get_buffer(pb, ast->pkt.data+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
return AVERROR(EIO);
rm->audio_stream_num = 0;
rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
// Release first audio packet
av_new_packet(pkt, st->codec->block_align);
memcpy(pkt->data, ast->buf, st->codec->block_align);
memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
pkt->stream_index = 0;
} else {


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