diff options
| author | Mans Rullgard <mans@mansr.com> | 2011-11-27 14:04:16 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-12-11 18:47:19 +0000 |
| commit | 3383a53e7d0abb9639c3ea3481f0eda9dca61a26 (patch) | |
| tree | d53f0c38d95d4256b727dc4f4c5add488aabe501 /libavformat/aiffenc.c | |
| parent | 5b3265a7181889b53ff8217c1bdccdf966c86955 (diff) | |
| download | ffmpeg-3383a53e7d0abb9639c3ea3481f0eda9dca61a26.tar.gz | |
lavu: replace int/float punning functions
The existing functions defined in intfloat_readwrite.[ch] are
both slow and incorrect (infinities are not handled).
This introduces a new header with fast, inline conversion
functions using direct union punning assuming an IEEE-754
system, an assumption already made throughout the code.
The one use of Intel/Motorola extended 80-bit format is
replaced by simpler code sufficient under the present
constraints (positive normal values).
The old functions are marked deprecated and retained for
compatibility.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavformat/aiffenc.c')
| -rw-r--r-- | libavformat/aiffenc.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c index df43688d40..2916d26fc6 100644 --- a/libavformat/aiffenc.c +++ b/libavformat/aiffenc.c @@ -19,7 +19,7 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#include "libavutil/intfloat_readwrite.h" +#include "libavutil/intfloat.h" #include "avformat.h" #include "internal.h" #include "aiff.h" @@ -36,7 +36,7 @@ static int aiff_write_header(AVFormatContext *s) AIFFOutputContext *aiff = s->priv_data; AVIOContext *pb = s->pb; AVCodecContext *enc = s->streams[0]->codec; - AVExtFloat sample_rate; + uint64_t sample_rate; int aifc = 0; /* First verify if format is ok */ @@ -82,8 +82,9 @@ static int aiff_write_header(AVFormatContext *s) avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */ - sample_rate = av_dbl2ext((double)enc->sample_rate); - avio_write(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); + sample_rate = av_double2int(enc->sample_rate); + avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023)); + avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11); if (aifc) { avio_wl32(pb, enc->codec_tag); |