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mp3enc: drop sum and count bytes instead of bitrates from decoded headers. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-04-26 03:22:21 +02:00
parent 7d62475656
commit ec9a5deb20
1 changed files with 5 additions and 9 deletions
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14
libavformat/mp3enc.c
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@ -172,7 +172,6 @@ typedef struct MP3Context {
uint32_t want;
uint32_t seen;
uint32_t pos;
uint64_t sum;
uint64_t bag[VBR_NUM_BAGS];
} toc;
} xing_header;
@ -277,7 +276,6 @@ static int mp3_write_xing(AVFormatContext *s)
mp3->xing_header.toc.want=1;
mp3->xing_header.toc.seen=0;
mp3->xing_header.toc.pos=0;
mp3->xing_header.toc.sum=0;
avio_wb32(s->pb, 0); // frames
avio_wb32(s->pb, 0); // size
@ -296,7 +294,7 @@ static int mp3_write_xing(AVFormatContext *s)
* Add a frame to XING data.
* Following lame's "VbrTag.c".
*/
static void mp3_xing_add_frame(AVFormatContext *s, AVPacket *pkt, MPADecodeHeader *c)
static void mp3_xing_add_frame(AVFormatContext *s, AVPacket *pkt)
{
MP3Context *mp3 = s->priv_data;
struct xing_header *xing_header = &mp3->xing_header;
@ -305,10 +303,9 @@ static void mp3_xing_add_frame(AVFormatContext *s, AVPacket *pkt, MPADecodeHeade
++xing_header->frames;
xing_header->size += pkt->size;
toc->sum += c->bit_rate / 1000;
if (toc->want == ++toc->seen) {
toc->bag[toc->pos] = toc->sum;
toc->bag[toc->pos] = xing_header->size;
if (VBR_NUM_BAGS == ++toc->pos) {
/* shrink table to half size by throwing away each second bag. */
@ -342,8 +339,7 @@ static void mp3_fix_xing(AVFormatContext *s)
for (i = 1; i < VBR_TOC_SIZE; ++i) {
int j = (int)floor(scale * i);
int seek_point = (int)floor(256.0 * toc->bag[j] / toc->sum);
int seek_point = (int)floor(256.0 * toc->bag[j] / xing_header->size);
avio_w8(s->pb, (uint8_t)(seek_point < 256 ? seek_point : 255));
}
@ -414,9 +410,9 @@ static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt)
MPADecodeHeader c;
int base;
#ifdef FILTER_VBR_HEADERS
ff_mpegaudio_decode_header(&c, AV_RB32(pkt->data));
#ifdef FILTER_VBR_HEADERS
/* filter out XING and INFO headers. */
base = 4 + xing_offtbl[c.lsf == 1][c.nb_channels == 1];
@ -435,7 +431,7 @@ static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt)
#endif
if (0 < mp3->xing_header.offset)
mp3_xing_add_frame(s, pkt, &c);
mp3_xing_add_frame(s, pkt);
return ff_raw_write_packet(s, pkt);
}