roqaudioenc.c File Reference

#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "mathops.h"

Go to the source code of this file.

Data Structures
struct	ROQDPCMContext

Macros
#define	ROQ_FRAME_SIZE   735
#define	ROQ_HEADER_SIZE   8
#define	MAX_DPCM   (127*127)

Functions
static av_cold int	roq_dpcm_encode_close (AVCodecContext *avctx)
static av_cold int	roq_dpcm_encode_init (AVCodecContext *avctx)
static unsigned char	dpcm_predict (short *previous, short current)
static int	roq_dpcm_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)

Variables
AVCodec	ff_roq_dpcm_encoder

Macro Definition Documentation

#define ROQ_FRAME_SIZE   735

Definition at line 29 of file roqaudioenc.c.

Referenced by roq_dpcm_encode_init().

#define ROQ_HEADER_SIZE   8

Definition at line 30 of file roqaudioenc.c.

Referenced by roq_dpcm_encode_frame(), and roq_dpcm_encode_init().

#define MAX_DPCM   (127*127)

Definition at line 32 of file roqaudioenc.c.

Referenced by dpcm_predict().

Function Documentation

static av_cold int roq_dpcm_encode_close ( AVCodecContext *  avctx )

static

Definition at line 45 of file roqaudioenc.c.

Referenced by roq_dpcm_encode_init().

static av_cold int roq_dpcm_encode_init ( AVCodecContext *  avctx )

static

Definition at line 57 of file roqaudioenc.c.

static unsigned char dpcm_predict ( short *  previous, short  current  )

static

Definition at line 98 of file roqaudioenc.c.

Referenced by roq_dpcm_encode_frame().

static int roq_dpcm_encode_frame ( AVCodecContext *  avctx, AVPacket *  avpkt, const AVFrame *  frame, int *  got_packet_ptr  )

static

Definition at line 138 of file roqaudioenc.c.

Variable Documentation

AVCodec ff_roq_dpcm_encoder

Initial value:

= {
    .name           = "roq_dpcm",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ROQ_DPCM,
    .priv_data_size = sizeof(ROQDPCMContext),
    .init           = roq_dpcm_encode_init,
    .encode2        = roq_dpcm_encode_frame,
    .close          = roq_dpcm_encode_close,
    .capabilities   = CODEC_CAP_DELAY,
    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
                                                     AV_SAMPLE_FMT_NONE },
    .long_name      = NULL_IF_CONFIG_SMALL("id RoQ DPCM"),
}

Definition at line 205 of file roqaudioenc.c.