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dca: Move syncword definitions to a separate header

This commit is contained in:
Diego Biurrun 2015-02-25 13:50:15 +01:00
parent 1dc19729e9
commit 25f613f8be
7 changed files with 63 additions and 34 deletions
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11
libavcodec/dca.c
View File

@ -24,6 +24,7 @@
#include "libavutil/error.h"
#include "dca.h"
#include "dca_syncwords.h"
#include "put_bits.h"
const uint32_t avpriv_dca_sample_rates[16] = {
@ -45,18 +46,18 @@ int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
mrk = AV_RB32(src);
switch (mrk) {
case DCA_MARKER_RAW_BE:
case DCA_SYNCWORD_CORE_BE:
memcpy(dst, src, src_size);
return src_size;
case DCA_MARKER_RAW_LE:
case DCA_SYNCWORD_CORE_LE:
for (i = 0; i < (src_size + 1) >> 1; i++)
*sdst++ = av_bswap16(*ssrc++);
return src_size;
case DCA_MARKER_14B_BE:
case DCA_MARKER_14B_LE:
case DCA_SYNCWORD_CORE_14B_BE:
case DCA_SYNCWORD_CORE_14B_LE:
init_put_bits(&pb, dst, max_size);
for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {
tmp = ((mrk == DCA_MARKER_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
put_bits(&pb, 14, tmp);
}
flush_put_bits(&pb);

9
libavcodec/dca.h
View File

@ -35,15 +35,6 @@
#include "fmtconvert.h"
#include "get_bits.h"
/** DCA syncwords, also used for bitstream type detection */
#define DCA_MARKER_RAW_BE 0x7FFE8001
#define DCA_MARKER_RAW_LE 0xFE7F0180
#define DCA_MARKER_14B_BE 0x1FFFE800
#define DCA_MARKER_14B_LE 0xFF1F00E8
/** DCA-HD specific block starts with this marker. */
#define DCA_HD_MARKER 0x64582025
#define DCA_PRIM_CHANNELS_MAX (7)
#define DCA_ABITS_MAX (32) /* Should be 28 */
#define DCA_SUBSUBFRAMES_MAX (4)

9
libavcodec/dca_parser.c
View File

@ -23,6 +23,7 @@
*/
#include "dca.h"
#include "dca_syncwords.h"
#include "get_bits.h"
#include "parser.h"
@ -35,9 +36,9 @@ typedef struct DCAParseContext {
} DCAParseContext;
#define IS_MARKER(state, i, buf, buf_size) \
((state == DCA_MARKER_14B_LE && (i < buf_size - 2) && (buf[i + 1] & 0xF0) == 0xF0 && buf[i + 2] == 0x07) || \
(state == DCA_MARKER_14B_BE && (i < buf_size - 2) && buf[i + 1] == 0x07 && (buf[i + 2] & 0xF0) == 0xF0) || \
state == DCA_MARKER_RAW_LE || state == DCA_MARKER_RAW_BE)
((state == DCA_SYNCWORD_CORE_14B_LE && (i < buf_size - 2) && (buf[i + 1] & 0xF0) == 0xF0 && buf[i + 2] == 0x07) || \
(state == DCA_SYNCWORD_CORE_14B_BE && (i < buf_size - 2) && buf[i + 1] == 0x07 && (buf[i + 2] & 0xF0) == 0xF0) || \
state == DCA_SYNCWORD_CORE_LE || state == DCA_SYNCWORD_CORE_BE)
/**
* Find the end of the current frame in the bitstream.
@ -75,7 +76,7 @@ static int dca_find_frame_end(DCAParseContext *pc1, const uint8_t *buf,
for (; i < buf_size; i++) {
pc1->size++;
state = (state << 8) | buf[i];
if (state == DCA_HD_MARKER && !pc1->hd_pos)
if (state == DCA_SYNCWORD_SUBSTREAM && !pc1->hd_pos)
pc1->hd_pos = pc1->size;
if (state == pc1->lastmarker && IS_MARKER(state, i, buf, buf_size)) {
if (pc1->framesize > pc1->size)

37
libavcodec/dca_syncwords.h Normal file
View File

@ -0,0 +1,37 @@
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DCA_SYNCWORDS_H
#define AVCODEC_DCA_SYNCWORDS_H
enum DCASyncwords {
DCA_SYNCWORD_CORE_BE = 0x7FFE8001,
DCA_SYNCWORD_CORE_LE = 0xFE7F0180,
DCA_SYNCWORD_CORE_14B_BE = 0x1FFFE800,
DCA_SYNCWORD_CORE_14B_LE = 0xFF1F00E8,
DCA_SYNCWORD_XCH = 0x5A5A5A5A,
DCA_SYNCWORD_XXCH = 0x47004A03,
DCA_SYNCWORD_X96 = 0x1D95F262,
DCA_SYNCWORD_XBR = 0x655E315E,
DCA_SYNCWORD_LBR = 0x0A801921,
DCA_SYNCWORD_XLL = 0x41A29547,
DCA_SYNCWORD_SUBSTREAM = 0x64582025,
DCA_SYNCWORD_SUBSTREAM_CORE = 0x02B09261,
};
#endif /* AVCODEC_DCA_SYNCWORDS_H */

7
libavcodec/dcadec.c
View File

@ -37,6 +37,7 @@
#include "avcodec.h"
#include "dca.h"
#include "dca_syncwords.h"
#include "dcadata.h"
#include "dcadsp.h"
#include "dcahuff.h"
@ -1100,7 +1101,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
uint32_t bits = get_bits_long(&s->gb, 32);
switch (bits) {
case 0x5a5a5a5a: {
case DCA_SYNCWORD_XCH: {
int ext_amode, xch_fsize;
s->xch_base_channel = s->prim_channels;
@ -1137,7 +1138,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
s->xch_present = 1;
break;
}
case 0x47004a03:
case DCA_SYNCWORD_XXCH:
/* XXCh: extended channels */
/* usually found either in core or HD part in DTS-HD HRA streams,
* but not in DTS-ES which contains XCh extensions instead */
@ -1174,7 +1175,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
/* check for ExSS (HD part) */
if (s->dca_buffer_size - s->frame_size > 32 &&
get_bits_long(&s->gb, 32) == DCA_HD_MARKER)
get_bits_long(&s->gb, 32) == DCA_SYNCWORD_SUBSTREAM)
ff_dca_exss_parse_header(s);
avctx->profile = s->profile;

13
libavformat/dtsdec.c
View File

@ -20,14 +20,11 @@
*/
#include "libavcodec/bytestream.h"
#include "libavcodec/dca_syncwords.h"
#include "avformat.h"
#include "rawdec.h"
#define DCA_MARKER_14B_BE 0x1FFFE800
#define DCA_MARKER_14B_LE 0xFF1F00E8
#define DCA_MARKER_RAW_BE 0x7FFE8001
#define DCA_MARKER_RAW_LE 0xFE7F0180
static int dts_probe(AVProbeData *p)
{
const uint8_t *buf, *bufp;
@ -42,16 +39,16 @@ static int dts_probe(AVProbeData *p)
state = (state << 16) | bytestream_get_be16(&bufp);
/* regular bitstream */
if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
if (state == DCA_SYNCWORD_CORE_BE || state == DCA_SYNCWORD_CORE_LE)
markers[0]++;
/* 14 bits big-endian bitstream */
if (state == DCA_MARKER_14B_BE)
if (state == DCA_SYNCWORD_CORE_14B_BE)
if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
markers[1]++;
/* 14 bits little-endian bitstream */
if (state == DCA_MARKER_14B_LE)
if (state == DCA_SYNCWORD_CORE_14B_LE)
if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
markers[2]++;
}

11
libavformat/spdifenc.c
View File

@ -51,6 +51,7 @@
#include "spdif.h"
#include "libavcodec/ac3.h"
#include "libavcodec/dca.h"
#include "libavcodec/dca_syncwords.h"
#include "libavcodec/aacadtsdec.h"
#include "libavutil/opt.h"
@ -251,25 +252,25 @@ static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
return AVERROR_INVALIDDATA;
switch (syncword_dts) {
case DCA_MARKER_RAW_BE:
case DCA_SYNCWORD_CORE_BE:
blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
break;
case DCA_MARKER_RAW_LE:
case DCA_SYNCWORD_CORE_LE:
blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
ctx->extra_bswap = 1;
break;
case DCA_MARKER_14B_BE:
case DCA_SYNCWORD_CORE_14B_BE:
blocks =
(((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
break;
case DCA_MARKER_14B_LE:
case DCA_SYNCWORD_CORE_14B_LE:
blocks =
(((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
ctx->extra_bswap = 1;
break;
case DCA_HD_MARKER:
case DCA_SYNCWORD_SUBSTREAM:
/* We only handle HD frames that are paired with core. However,
sometimes DTS-HD streams with core have a stray HD frame without
core in the beginning of the stream. */