libavcodec/ws-snd1.c File Reference

Westwood SNDx codecs. More...

#include "libavutil/intreadwrite.h"
#include "avcodec.h"

Go to the source code of this file.

Defines
#define	CLIP8(a)   if(a>127)a=127;if(a<-128)a=-128;
Functions
static av_cold int	ws_snd_decode_init (AVCodecContext *avctx)
static int	ws_snd_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
Variables
static const char	ws_adpcm_2bit [] = { -2, -1, 0, 1}
static const char	ws_adpcm_4bit []
AVCodec	ws_snd1_decoder

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Detailed Description

Westwood SNDx codecs.

Reference documents about VQA format and its audio codecs can be found here: http://www.multimedia.cx

Definition in file ws-snd1.c.

---

Define Documentation

#define CLIP8

(

a

)

if(a>127)a=127;if(a<-128)a=-128;

Definition at line 39 of file ws-snd1.c.

Referenced by ws_snd_decode_frame().

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Function Documentation

static int ws_snd_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 49 of file ws-snd1.c.

static av_cold int ws_snd_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 41 of file ws-snd1.c.

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Variable Documentation

const char ws_adpcm_2bit[] = { -2, -1, 0, 1} [static]

Definition at line 34 of file ws-snd1.c.

Referenced by ws_snd_decode_frame().

const char ws_adpcm_4bit[] [static]

Initial value:

 {
    -9, -8, -6, -5, -4, -3, -2, -1,
     0,  1,  2,  3,  4,  5,  6,  8 }

Definition at line 35 of file ws-snd1.c.

Referenced by ws_snd_decode_frame().

AVCodec ws_snd1_decoder

Initial value:

 {
    "ws_snd1",
    AVMEDIA_TYPE_AUDIO,
    CODEC_ID_WESTWOOD_SND1,
    0,
    ws_snd_decode_init,
    NULL,
    NULL,
    ws_snd_decode_frame,
    .long_name = NULL_IF_CONFIG_SMALL("Westwood Audio (SND1)"),
}

Definition at line 148 of file ws-snd1.c.