pcm-dvda.c File Reference

#include <assert.h>
#include <stddef.h>
#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	PCMDVDAHeader
struct	PCMDVDAContext

Macros
#define	CH_C   AV_CH_FRONT_CENTER
#define	CH_L   AV_CH_FRONT_LEFT
#define	CH_R   AV_CH_FRONT_RIGHT
#define	CH_LFE   AV_CH_LOW_FREQUENCY
#define	CH_S   AV_CH_BACK_CENTER
#define	CH_LS   AV_CH_BACK_LEFT
#define	CH_RS   AV_CH_BACK_RIGHT

Functions
static av_cold int	pcm_dvda_decode_init (AVCodecContext *avctx)
static int	pcm_dvda_parse_header (AVCodecContext *avctx, const PCMDVDAHeader *header)
static void	pcm_dvda_decode_samples (AVCodecContext *avctx, GetByteContext *gb, void *dst, int blocks)
static int	pcm_dvda_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)

Variables
struct {
uint8_t   group1_channels
uint8_t   group2_channels
uint64_t   channels [6]
}	channel_assignments [21]
const FFCodec	ff_pcm_dvda_decoder

Macro Definition Documentation

CH_C

#define CH_C   AV_CH_FRONT_CENTER

Definition at line 89 of file pcm-dvda.c.

CH_L

#define CH_L   AV_CH_FRONT_LEFT

Definition at line 90 of file pcm-dvda.c.

CH_R

#define CH_R   AV_CH_FRONT_RIGHT

Definition at line 91 of file pcm-dvda.c.

CH_LFE

#define CH_LFE   AV_CH_LOW_FREQUENCY

Definition at line 92 of file pcm-dvda.c.

CH_S

#define CH_S   AV_CH_BACK_CENTER

Definition at line 93 of file pcm-dvda.c.

CH_LS

#define CH_LS   AV_CH_BACK_LEFT

Definition at line 94 of file pcm-dvda.c.

CH_RS

#define CH_RS   AV_CH_BACK_RIGHT

Definition at line 95 of file pcm-dvda.c.

Function Documentation

pcm_dvda_decode_init()

static av_cold int pcm_dvda_decode_init ( AVCodecContext * avctx )

static

Definition at line 134 of file pcm-dvda.c.

pcm_dvda_parse_header()

static int pcm_dvda_parse_header ( AVCodecContext * avctx, const PCMDVDAHeader * header )

static

Definition at line 144 of file pcm-dvda.c.

Referenced by pcm_dvda_decode_frame().

pcm_dvda_decode_samples()

static void pcm_dvda_decode_samples ( AVCodecContext * avctx, GetByteContext * gb, void * dst, int blocks )

static

Definition at line 252 of file pcm-dvda.c.

Referenced by pcm_dvda_decode_frame().

pcm_dvda_decode_frame()

static int pcm_dvda_decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame_ptr, AVPacket * avpkt )

static

Definition at line 291 of file pcm-dvda.c.

Variable Documentation

group1_channels

uint8_t group1_channels

Definition at line 107 of file pcm-dvda.c.

group2_channels

uint8_t group2_channels

Definition at line 108 of file pcm-dvda.c.

channels

uint64_t channels[6]

Definition at line 109 of file pcm-dvda.c.

[struct]

const struct { ... } channel_assignments[21]

Initial value:

= {
    [ 0] = { 1, 0, { CH_C } },
    [ 1] = { 2, 0, { CH_L, CH_R } },
    [ 2] = { 2, 1, { CH_L, CH_R, CH_S } },
    [ 3] = { 2, 2, { CH_L, CH_R, CH_LS, CH_RS } },
    [ 4] = { 2, 1, { CH_L, CH_R, CH_LFE } },
    [ 5] = { 2, 2, { CH_L, CH_R, CH_LFE, CH_S } },
    [ 6] = { 2, 3, { CH_L, CH_R, CH_LFE, CH_LS, CH_RS } },
    [ 7] = { 2, 1, { CH_L, CH_R, CH_C } },
    [ 8] = { 2, 2, { CH_L, CH_R, CH_C, CH_S } },
    [ 9] = { 2, 3, { CH_L, CH_R, CH_C, CH_LS, CH_RS } },
    [10] = { 2, 2, { CH_L, CH_R, CH_C, CH_LFE } },
    [11] = { 2, 3, { CH_L, CH_R, CH_C, CH_LFE, CH_S } },
    [12] = { 2, 4, { CH_L, CH_R, CH_C, CH_LFE, CH_LS, CH_RS } },
    [13] = { 3, 1, { CH_L, CH_R, CH_C, CH_S } },
    [14] = { 3, 2, { CH_L, CH_R, CH_C, CH_LS, CH_RS } },
    [15] = { 3, 1, { CH_L, CH_R, CH_C, CH_LFE } },
    [16] = { 3, 2, { CH_L, CH_R, CH_C, CH_LFE, CH_S } },
    [17] = { 3, 3, { CH_L, CH_R, CH_C, CH_LFE, CH_LS, CH_RS } },
    [18] = { 4, 1, { CH_L, CH_R, CH_LS, CH_RS, CH_LFE } },
    [19] = { 4, 1, { CH_L, CH_R, CH_LS, CH_RS, CH_C } },
    [20] = { 4, 2, { CH_L, CH_R, CH_LS, CH_RS, CH_C, CH_LFE } },
}

Referenced by pcm_dvda_parse_header().

ff_pcm_dvda_decoder

const FFCodec ff_pcm_dvda_decoder

Initial value:

= {
    .p.name         = "pcm_dvda",
    CODEC_LONG_NAME("PCM signed 16|20|24-bit big-endian for DVD-Audio media"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_PCM_DVDA,
    .priv_data_size = sizeof(PCMDVDAContext),
    .init           = pcm_dvda_decode_init,
    FF_CODEC_DECODE_CB(pcm_dvda_decode_frame),
    .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
                      AV_CODEC_CAP_DR1,
}

Definition at line 343 of file pcm-dvda.c.