rawdec.c File Reference

Raw Video Decoder. More...

#include "avcodec.h"
#include "bswapdsp.h"
#include "get_bits.h"
#include "internal.h"
#include "raw.h"
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	RawVideoContext

Macros
#define	SCALE16(x, bits)   (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
#define	MKSCALE16(name, r16, w16)
	Scale buffer to 16 bits per coded sample resolution.

Functions
static av_cold int	raw_init_decoder (AVCodecContext *avctx)
static void	flip (AVCodecContext *avctx, AVPicture *picture)
static int	raw_decode (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	raw_close_decoder (AVCodecContext *avctx)

Variables
static const AVOption	options []
static const AVClass	rawdec_class
AVCodec	ff_rawvideo_decoder

Detailed Description

Raw Video Decoder.

Definition in file rawdec.c.

Macro Definition Documentation

#define SCALE16	(		x,
			bits
	)		(((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))

Definition at line 124 of file rawdec.c.

#define MKSCALE16	(		name,
			r16,
			w16
	)

Value:

static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
{ \
    int i; \
    if (!packed) { \
        for (i = 0; i + 1 < buf_size; i += 2) \
            w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
    } else { \
        GetBitContext gb; \
        init_get_bits(&gb, buf, buf_size * 8); \
        for (i = 0; i < avctx->width * avctx->height; i++) { \
            int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
            w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
        } \
   } \
}

Scale buffer to 16 bits per coded sample resolution.

Definition at line 129 of file rawdec.c.

Function Documentation

static av_cold int raw_init_decoder ( AVCodecContext *  avctx )

static

Definition at line 65 of file rawdec.c.

static void flip ( AVCodecContext *  avctx, AVPicture *  picture  )

static

Definition at line 115 of file rawdec.c.

Referenced by av_display_matrix_flip(), config_input(), ff_oss_audio_open(), filter_frame(), get_video_buffer(), raw_decode(), and tnput().

static int raw_decode ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 149 of file rawdec.c.

static av_cold int raw_close_decoder ( AVCodecContext *  avctx )

static

Definition at line 357 of file rawdec.c.

Variable Documentation

const AVOption options[]

static

Initial value:

={
{"top", "top field first", 0x42, AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},
{NULL}
}

Definition at line 54 of file rawdec.c.

const AVClass rawdec_class

static

Initial value:

= {
    .class_name = "rawdec",
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 59 of file rawdec.c.

AVCodec ff_rawvideo_decoder

Initial value:

= {
    .name           = "rawvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_RAWVIDEO,
    .priv_data_size = sizeof(RawVideoContext),
    .init           = raw_init_decoder,
    .close          = raw_close_decoder,
    .decode         = raw_decode,
    .priv_class     = &rawdec_class,
    .capabilities   = CODEC_CAP_PARAM_CHANGE,
}

Definition at line 365 of file rawdec.c.