nellymoserenc.c File Reference

Nellymoser encoder by Bartlomiej Wolowiec. More...

#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mathematics.h"
#include "audio_frame_queue.h"
#include "avcodec.h"
#include "fft.h"
#include "internal.h"
#include "nellymoser.h"
#include "sinewin.h"
#include "put_bits.h"

Classes
struct	NellyMoserEncodeContext

Macros
#define	BITSTREAM_WRITER_LE
#define	POW_TABLE_SIZE   (1<<11)
#define	POW_TABLE_OFFSET   3
#define	OPT_SIZE   ((1<<15) + 3000)
#define	find_best(val, table, LUT, LUT_add, LUT_size)

Typedefs
typedef struct NellyMoserEncodeContext	NellyMoserEncodeContext

Variables
AVCodec	ff_nellymoser_encoder

Detailed Description

Nellymoser encoder by Bartlomiej Wolowiec.

Generic codec information: libavcodec/nellymoserdec.c

Some information also from: http://samples.mplayerhq.hu/A-codecs/Nelly_Moser/ASAO/ASAO.zip (Copyright Joseph Artsimovich and UAB "DKD")

for more information about nellymoser format, visit: http://wiki.multimedia.cx/index.php?title=Nellymoser

Macro Definition Documentation

find_best

#define find_best	(		val,
			table,
			LUT,
			LUT_add,
			LUT_size
	)

Value:

best_idx = \
        LUT[av_clip ((lrintf(val) >> 8) + LUT_add, 0, LUT_size - 1)]; \
    if (fabs(val - table[best_idx]) > fabs(val - table[best_idx + 1])) \
        best_idx++;

Variable Documentation

ff_nellymoser_encoder

AVCodec ff_nellymoser_encoder

Initial value:

= {
    .name           = "nellymoser",
    .long_name      = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_NELLYMOSER,
    .priv_data_size = sizeof(NellyMoserEncodeContext),
    .init           = encode_init,
    .encode2        = encode_frame,
    .close          = encode_end,
    .capabilities   = AV_CODEC_CAP_SMALL_LAST_FRAME | AV_CODEC_CAP_DELAY,
    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLT,
                                                     AV_SAMPLE_FMT_NONE },
}