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avcodec: Implement Archimedes VIDC encoder/decoder

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Signed-off-by: Cameron Cawley <ccawley2011@gmail.com>
This commit is contained in:
Cameron Cawley 2018-10-13 00:06:39 +01:00 committed by Paul B Mahol
parent fb7925ba2f
commit 22238d0b94
15 changed files with 72 additions and 2 deletions
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1
Changelog
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@ -40,6 +40,7 @@ version <next>:
- vibrance filter
- decoding S12M timecode in h264
- xstack filter
- pcm vidc decoder and encoder
version 4.0:

2
doc/general.texi
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@ -545,6 +545,7 @@ library:
@item raw VC-1 @tab X @tab X
@item raw PCM A-law @tab X @tab X
@item raw PCM mu-law @tab X @tab X
@item raw PCM Archimedes VIDC @tab X @tab X
@item raw PCM signed 8 bit @tab X @tab X
@item raw PCM signed 16 bit big-endian @tab X @tab X
@item raw PCM signed 16 bit little-endian @tab X @tab X
@ -1147,6 +1148,7 @@ following image formats are supported:
@tab encoding supported through external library libopus
@item PCM A-law @tab X @tab X
@item PCM mu-law @tab X @tab X
@item PCM Archimedes VIDC @tab X @tab X
@item PCM signed 8-bit planar @tab X @tab X
@item PCM signed 16-bit big-endian planar @tab X @tab X
@item PCM signed 16-bit little-endian planar @tab X @tab X

2
libavcodec/Makefile
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@ -794,6 +794,8 @@ OBJS-$(CONFIG_PCM_U32BE_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_U32BE_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_U32LE_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_U32LE_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_VIDC_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_VIDC_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_ZORK_DECODER) += pcm.o
OBJS-$(CONFIG_ADPCM_4XM_DECODER) += adpcm.o adpcm_data.o

2
libavcodec/allcodecs.c
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@ -552,6 +552,8 @@ extern AVCodec ff_pcm_u32be_encoder;
extern AVCodec ff_pcm_u32be_decoder;
extern AVCodec ff_pcm_u32le_encoder;
extern AVCodec ff_pcm_u32le_decoder;
extern AVCodec ff_pcm_vidc_encoder;
extern AVCodec ff_pcm_vidc_decoder;
extern AVCodec ff_pcm_zork_decoder;
/* DPCM codecs */

1
libavcodec/avcodec.h
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@ -491,6 +491,7 @@ enum AVCodecID {
AV_CODEC_ID_PCM_S64BE,
AV_CODEC_ID_PCM_F16LE,
AV_CODEC_ID_PCM_F24LE,
AV_CODEC_ID_PCM_VIDC,
/* various ADPCM codecs */
AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,

7
libavcodec/codec_desc.c
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@ -1936,6 +1936,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("PCM 24.0 floating point little-endian"),
.props = AV_CODEC_PROP_LOSSLESS,
},
{
.id = AV_CODEC_ID_PCM_VIDC,
.type = AVMEDIA_TYPE_AUDIO,
.name = "pcm_vidc",
.long_name = NULL_IF_CONFIG_SMALL("PCM Archimedes VIDC"),
.props = AV_CODEC_PROP_LOSSY,
},
/* various ADPCM codecs */
{

15
libavcodec/pcm.c
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@ -42,6 +42,9 @@ static av_cold int pcm_encode_init(AVCodecContext *avctx)
case AV_CODEC_ID_PCM_MULAW:
pcm_ulaw_tableinit();
break;
case AV_CODEC_ID_PCM_VIDC:
pcm_vidc_tableinit();
break;
default:
break;
}
@ -216,6 +219,12 @@ static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
*dst++ = linear_to_ulaw[(v + 32768) >> 2];
}
break;
case AV_CODEC_ID_PCM_VIDC:
for (; n > 0; n--) {
v = *samples++;
*dst++ = linear_to_vidc[(v + 32768) >> 2];
}
break;
default:
return -1;
}
@ -249,6 +258,10 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx)
for (i = 0; i < 256; i++)
s->table[i] = ulaw2linear(i);
break;
case AV_CODEC_ID_PCM_VIDC:
for (i = 0; i < 256; i++)
s->table[i] = vidc2linear(i);
break;
case AV_CODEC_ID_PCM_F16LE:
case AV_CODEC_ID_PCM_F24LE:
s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));
@ -485,6 +498,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
break;
case AV_CODEC_ID_PCM_ALAW:
case AV_CODEC_ID_PCM_MULAW:
case AV_CODEC_ID_PCM_VIDC:
for (; n > 0; n--) {
AV_WN16A(samples, s->table[*src++]);
samples += 2;
@ -612,3 +626,4 @@ PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned
PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");
PCM_CODEC (PCM_S64BE, AV_SAMPLE_FMT_S64, pcm_s64be, "PCM signed 64-bit big-endian");
PCM_CODEC (PCM_S64LE, AV_SAMPLE_FMT_S64, pcm_s64le, "PCM signed 64-bit little-endian");
PCM_CODEC (PCM_VIDC, AV_SAMPLE_FMT_S16, pcm_vidc, "PCM Archimedes VIDC");

2
libavcodec/pcm_tablegen.c
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@ -29,11 +29,13 @@ int main(void)
{
pcm_alaw_tableinit();
pcm_ulaw_tableinit();
pcm_vidc_tableinit();
write_fileheader();
WRITE_ARRAY("static const", uint8_t, linear_to_alaw);
WRITE_ARRAY("static const", uint8_t, linear_to_ulaw);
WRITE_ARRAY("static const", uint8_t, linear_to_vidc);
return 0;
}

27
libavcodec/pcm_tablegen.h
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@ -36,6 +36,12 @@
#define BIAS (0x84) /* Bias for linear code. */
#define VIDC_SIGN_BIT (1)
#define VIDC_QUANT_MASK (0x1E)
#define VIDC_QUANT_SHIFT (1)
#define VIDC_SEG_SHIFT (5)
#define VIDC_SEG_MASK (0xE0)
/* alaw2linear() - Convert an A-law value to 16-bit linear PCM */
static av_cold int alaw2linear(unsigned char a_val)
{
@ -69,14 +75,30 @@ static av_cold int ulaw2linear(unsigned char u_val)
return (u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS);
}
static av_cold int vidc2linear(unsigned char u_val)
{
int t;
/*
* Extract and bias the quantization bits. Then
* shift up by the segment number and subtract out the bias.
*/
t = (((u_val & VIDC_QUANT_MASK) >> VIDC_QUANT_SHIFT) << 3) + BIAS;
t <<= ((unsigned)u_val & VIDC_SEG_MASK) >> VIDC_SEG_SHIFT;
return (u_val & VIDC_SIGN_BIT) ? (BIAS - t) : (t - BIAS);
}
#if CONFIG_HARDCODED_TABLES
#define pcm_alaw_tableinit()
#define pcm_ulaw_tableinit()
#define pcm_vidc_tableinit()
#include "libavcodec/pcm_tables.h"
#else
/* 16384 entries per table */
static uint8_t linear_to_alaw[16384];
static uint8_t linear_to_ulaw[16384];
static uint8_t linear_to_vidc[16384];
static av_cold void build_xlaw_table(uint8_t *linear_to_xlaw,
int (*xlaw2linear)(unsigned char),
@ -111,6 +133,11 @@ static void pcm_ulaw_tableinit(void)
{
build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
}
static void pcm_vidc_tableinit(void)
{
build_xlaw_table(linear_to_vidc, vidc2linear, 0xff);
}
#endif /* CONFIG_HARDCODED_TABLES */
#endif /* AVCODEC_PCM_TABLEGEN_H */

1
libavcodec/utils.c
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@ -1438,6 +1438,7 @@ int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
case AV_CODEC_ID_DSD_MSBF_PLANAR:
case AV_CODEC_ID_PCM_ALAW:
case AV_CODEC_ID_PCM_MULAW:
case AV_CODEC_ID_PCM_VIDC:
case AV_CODEC_ID_PCM_S8:
case AV_CODEC_ID_PCM_S8_PLANAR:
case AV_CODEC_ID_PCM_U8:

4
libavcodec/version.h
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@ -28,8 +28,8 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 33
#define LIBAVCODEC_VERSION_MICRO 102
#define LIBAVCODEC_VERSION_MINOR 34
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \

2
libavformat/Makefile
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@ -411,6 +411,8 @@ OBJS-$(CONFIG_PCM_U32LE_DEMUXER) += pcmdec.o pcm.o
OBJS-$(CONFIG_PCM_U32LE_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PCM_U8_DEMUXER) += pcmdec.o pcm.o
OBJS-$(CONFIG_PCM_U8_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PCM_VIDC_DEMUXER) += pcmdec.o pcm.o
OBJS-$(CONFIG_PCM_VIDC_MUXER) += pcmenc.o rawenc.o
OBJS-$(CONFIG_PJS_DEMUXER) += pjsdec.o subtitles.o
OBJS-$(CONFIG_PMP_DEMUXER) += pmpdec.o
OBJS-$(CONFIG_PVA_DEMUXER) += pva.o

2
libavformat/allformats.c
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@ -289,6 +289,8 @@ extern AVInputFormat ff_pcm_alaw_demuxer;
extern AVOutputFormat ff_pcm_alaw_muxer;
extern AVInputFormat ff_pcm_mulaw_demuxer;
extern AVOutputFormat ff_pcm_mulaw_muxer;
extern AVInputFormat ff_pcm_vidc_demuxer;
extern AVOutputFormat ff_pcm_vidc_muxer;
extern AVInputFormat ff_pcm_f64be_demuxer;
extern AVOutputFormat ff_pcm_f64be_muxer;
extern AVInputFormat ff_pcm_f64le_demuxer;

3
libavformat/pcmdec.c
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@ -177,6 +177,9 @@ PCMDEF(alaw, "PCM A-law",
PCMDEF(mulaw, "PCM mu-law",
"ul", AV_CODEC_ID_PCM_MULAW)
PCMDEF(vidc, "PCM Archimedes VIDC",
NULL, AV_CODEC_ID_PCM_VIDC)
static const AVOption sln_options[] = {
{ "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },

3
libavformat/pcmenc.c
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@ -92,3 +92,6 @@ PCMDEF(alaw, "PCM A-law",
PCMDEF(mulaw, "PCM mu-law",
"ul", AV_CODEC_ID_PCM_MULAW)
PCMDEF(vidc, "PCM Archimedes VIDC",
NULL, AV_CODEC_ID_PCM_VIDC)