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Move code to be used by the IEC 61937 demuxer from spifenc.c into common 

files spdif.h and spdif.c.

Patch by Anssi Hannula, anssi d hannula a iki d fi

Originally committed as revision 25715 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/n0.8
Anssi Hannula Carl Eugen Hoyos 15 years ago
parent
fe655f6723
commit
8079d2ec08
4 changed files with 103 additions and 54 deletions
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  1. +1
    -1
      libavformat/Makefile
  2. +42
    -0
      libavformat/spdif.c
  3. +57
    -0
      libavformat/spdif.h
  4. +3
    -53
      libavformat/spdifenc.c

+ 1
- 1
libavformat/Makefile View File

@@ -256,7 +256,7 @@ OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o
OBJS-$(CONFIG_SOL_DEMUXER) += sol.o pcm.o
OBJS-$(CONFIG_SOX_DEMUXER) += soxdec.o pcm.o
OBJS-$(CONFIG_SOX_MUXER) += soxenc.o
OBJS-$(CONFIG_SPDIF_MUXER) += spdifenc.o
OBJS-$(CONFIG_SPDIF_MUXER) += spdif.o spdifenc.o
OBJS-$(CONFIG_SRT_DEMUXER) += srtdec.o
OBJS-$(CONFIG_SRT_MUXER) += rawenc.o
OBJS-$(CONFIG_STR_DEMUXER) += psxstr.o


+ 42
- 0
libavformat/spdif.c View File

@@ -0,0 +1,42 @@
/*
* IEC 61937 common code
* Copyright (c) 2009 Bartlomiej Wolowiec
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "spdif.h"
#include "libavutil/bswap.h"

//TODO move to DSP
void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w)
{
int i;

for (i = 0; i + 8 <= w; i += 8) {
dst[i + 0] = av_bswap16(src[i + 0]);
dst[i + 1] = av_bswap16(src[i + 1]);
dst[i + 2] = av_bswap16(src[i + 2]);
dst[i + 3] = av_bswap16(src[i + 3]);
dst[i + 4] = av_bswap16(src[i + 4]);
dst[i + 5] = av_bswap16(src[i + 5]);
dst[i + 6] = av_bswap16(src[i + 6]);
dst[i + 7] = av_bswap16(src[i + 7]);
}
for (; i < w; i++)
dst[i + 0] = av_bswap16(src[i + 0]);
}

+ 57
- 0
libavformat/spdif.h View File

@@ -0,0 +1,57 @@
/*
* IEC 61937 common header
* Copyright (c) 2009 Bartlomiej Wolowiec
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include <stdint.h>

#define SYNCWORD1 0xF872
#define SYNCWORD2 0x4E1F
#define BURST_HEADER_SIZE 0x8

enum IEC958DataType {
IEC958_AC3 = 0x01, ///< AC-3 data
IEC958_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1
IEC958_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension
IEC958_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension
IEC958_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS
IEC958_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency
IEC958_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency
IEC958_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency
IEC958_DTS1 = 0x0B, ///< DTS type I (512 samples)
IEC958_DTS2 = 0x0C, ///< DTS type II (1024 samples)
IEC958_DTS3 = 0x0D, ///< DTS type III (2048 samples)
IEC958_ATRAC = 0x0E, ///< Atrac data
IEC958_ATRAC3 = 0x0F, ///< Atrac 3 data
IEC958_ATRACX = 0x10, ///< Atrac 3 plus data
IEC958_DTSHD = 0x11, ///< DTS HD data
IEC958_WMAPRO = 0x12, ///< WMA 9 Professional data
IEC958_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency
IEC958_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency
IEC958_EAC3 = 0x15, ///< E-AC-3 data
IEC958_TRUEHD = 0x16, ///< TrueHD data
};

static const uint16_t spdif_mpeg_pkt_offset[2][3] = {
//LAYER1 LAYER2 LAYER3
{ 3072, 9216, 4608 }, // MPEG2 LSF
{ 1536, 4608, 4608 }, // MPEG1
};

void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w);

+ 3
- 53
libavformat/spdifenc.c View File

@@ -41,37 +41,11 @@
*/

#include "avformat.h"
#include "spdif.h"
#include "libavcodec/ac3.h"
#include "libavcodec/dca.h"
#include "libavcodec/aacadtsdec.h"

#define SYNCWORD1 0xF872
#define SYNCWORD2 0x4E1F
#define BURST_HEADER_SIZE 0x8

enum IEC958DataType {
IEC958_AC3 = 0x01, ///< AC-3 data
IEC958_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1
IEC958_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension
IEC958_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension
IEC958_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS
IEC958_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency
IEC958_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency
IEC958_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency
IEC958_DTS1 = 0x0B, ///< DTS type I (512 samples)
IEC958_DTS2 = 0x0C, ///< DTS type II (1024 samples)
IEC958_DTS3 = 0x0D, ///< DTS type III (2048 samples)
IEC958_ATRAC = 0x0E, ///< Atrac data
IEC958_ATRAC3 = 0x0F, ///< Atrac 3 data
IEC958_ATRACX = 0x10, ///< Atrac 3 plus data
IEC958_DTSHD = 0x11, ///< DTS HD data
IEC958_WMAPRO = 0x12, ///< WMA 9 Professional data
IEC958_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency
IEC958_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency
IEC958_EAC3 = 0x15, ///< E-AC-3 data
IEC958_TRUEHD = 0x16, ///< TrueHD data
};

typedef struct IEC958Context {
enum IEC958DataType data_type; ///< burst info - reference to type of payload of the data-burst
int pkt_size; ///< length code in bits
@@ -84,24 +58,6 @@ typedef struct IEC958Context {
int (*header_info) (AVFormatContext *s, AVPacket *pkt);
} IEC958Context;

//TODO move to DSP
static void bswap_buf16(uint16_t *dst, const uint16_t *src, int w)
{
int i;

for (i = 0; i + 8 <= w; i += 8) {
dst[i + 0] = av_bswap16(src[i + 0]);
dst[i + 1] = av_bswap16(src[i + 1]);
dst[i + 2] = av_bswap16(src[i + 2]);
dst[i + 3] = av_bswap16(src[i + 3]);
dst[i + 4] = av_bswap16(src[i + 4]);
dst[i + 5] = av_bswap16(src[i + 5]);
dst[i + 6] = av_bswap16(src[i + 6]);
dst[i + 7] = av_bswap16(src[i + 7]);
}
for (; i < w; i++)
dst[i + 0] = av_bswap16(src[i + 0]);
}

static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
{
@@ -159,12 +115,6 @@ static const enum IEC958DataType mpeg_data_type[2][3] = {
{ IEC958_MPEG1_LAYER1, IEC958_MPEG1_LAYER23, IEC958_MPEG1_LAYER23 }, //MPEG1
};

static const uint16_t mpeg_pkt_offset[2][3] = {
//LAYER1 LAYER2 LAYER3
{ 3072, 9216, 4608 }, // MPEG2 LSF
{ 1536, 4608, 4608 }, // MPEG1
};

static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
{
IEC958Context *ctx = s->priv_data;
@@ -182,7 +132,7 @@ static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
ctx->pkt_offset = 4608;
} else {
ctx->data_type = mpeg_data_type [version & 1][layer];
ctx->pkt_offset = mpeg_pkt_offset[version & 1][layer];
ctx->pkt_offset = spdif_mpeg_pkt_offset[version & 1][layer];
}
// TODO Data type dependant info (normal/karaoke, dynamic range control)
return 0;
@@ -282,7 +232,7 @@ static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
av_fast_malloc(&ctx->buffer, &ctx->buffer_size, pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!ctx->buffer)
return AVERROR(ENOMEM);
bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)pkt->data, pkt->size >> 1);
ff_spdif_bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)pkt->data, pkt->size >> 1);
put_buffer(s->pb, ctx->buffer, pkt->size & ~1);
#endif



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