Commit 894cbcd8 authored by Paul B Mahol's avatar Paul B Mahol

avcodec: add HCOM decoder

parent 301cee61
......@@ -362,6 +362,7 @@ OBJS-$(CONFIG_H264_V4L2M2M_DECODER) += v4l2_m2m_dec.o
OBJS-$(CONFIG_H264_V4L2M2M_ENCODER) += v4l2_m2m_enc.o
OBJS-$(CONFIG_HAP_DECODER) += hapdec.o hap.o
OBJS-$(CONFIG_HAP_ENCODER) += hapenc.o hap.o
OBJS-$(CONFIG_HCOM_DECODER) += hcom.o
OBJS-$(CONFIG_HEVC_DECODER) += hevcdec.o hevc_mvs.o \
hevc_cabac.o hevc_refs.o hevcpred.o \
hevcdsp.o hevc_filter.o hevc_data.o
......
......@@ -424,6 +424,7 @@ extern AVCodec ff_g723_1_decoder;
extern AVCodec ff_g729_decoder;
extern AVCodec ff_gsm_decoder;
extern AVCodec ff_gsm_ms_decoder;
extern AVCodec ff_hcom_decoder;
extern AVCodec ff_iac_decoder;
extern AVCodec ff_ilbc_decoder;
extern AVCodec ff_imc_decoder;
......
......@@ -646,6 +646,7 @@ enum AVCodecID {
AV_CODEC_ID_APTX_HD,
AV_CODEC_ID_SBC,
AV_CODEC_ID_ATRAC9,
AV_CODEC_ID_HCOM,
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
......
......@@ -2943,6 +2943,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("ATRAC9 (Adaptive TRansform Acoustic Coding 9)"),
.props = AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_HCOM,
.type = AVMEDIA_TYPE_AUDIO,
.name = "hcom",
.long_name = NULL_IF_CONFIG_SMALL("HCOM Audio"),
.props = AV_CODEC_PROP_LOSSY,
},
/* subtitle codecs */
{
......
/*
* HCOM audio decoder
*
* 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 "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
typedef struct HEntry {
int16_t l, r;
} HEntry;
typedef struct HCOMContext {
AVCodecContext *avctx;
uint8_t first_sample;
uint8_t sample;
int dict_entries;
int dict_entry;
int delta_compression;
HEntry *dict;
} HCOMContext;
static av_cold int hcom_init(AVCodecContext *avctx)
{
HCOMContext *s = avctx->priv_data;
if (avctx->channels != 1) {
av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
return AVERROR_INVALIDDATA;
}
if (avctx->extradata_size <= 7)
return AVERROR_INVALIDDATA;
s->dict_entries = AV_RB16(avctx->extradata);
if (avctx->extradata_size < s->dict_entries * 4 + 7)
return AVERROR_INVALIDDATA;
s->delta_compression = AV_RB32(avctx->extradata + 2);
s->sample = s->first_sample = avctx->extradata[avctx->extradata_size - 1];
s->dict = av_calloc(s->dict_entries, sizeof(*s->dict));
if (!s->dict)
return AVERROR(ENOMEM);
for (int i = 0; i < s->dict_entries; i++) {
s->dict[i].l = AV_RB16(avctx->extradata + 6 + 4 * i);
s->dict[i].r = AV_RB16(avctx->extradata + 6 + 4 * i + 2);
}
avctx->sample_fmt = AV_SAMPLE_FMT_U8;
s->dict_entry = 0;
return 0;
}
static int hcom_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *pkt)
{
HCOMContext *s = avctx->priv_data;
AVFrame *frame = data;
GetBitContext gb;
int ret, n = 0;
if (pkt->size > INT16_MAX)
return AVERROR_INVALIDDATA;
frame->nb_samples = pkt->size * 8;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
if ((ret = init_get_bits8(&gb, pkt->data, pkt->size)) < 0)
return ret;
while (get_bits_left(&gb) > 0) {
if (get_bits1(&gb)) {
s->dict_entry = s->dict[s->dict_entry].r;
} else {
s->dict_entry = s->dict[s->dict_entry].l;
}
if (s->dict[s->dict_entry].l < 0) {
int16_t datum;
datum = s->dict[s->dict_entry].r;
if (!s->delta_compression)
s->sample = 0;
s->sample = (s->sample + datum) & 0xFF;
frame->data[0][n++] = s->sample;
s->dict_entry = 0;
}
}
frame->nb_samples = n;
*got_frame = 1;
return pkt->size;
}
static av_cold int hcom_close(AVCodecContext *avctx)
{
HCOMContext *s = avctx->priv_data;
av_freep(&s->dict);
return 0;
}
AVCodec ff_hcom_decoder = {
.name = "hcom",
.long_name = NULL_IF_CONFIG_SMALL("HCOM Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_HCOM,
.priv_data_size = sizeof(HCOMContext),
.init = hcom_init,
.close = hcom_close,
.decode = hcom_decode,
.capabilities = AV_CODEC_CAP_DR1,
};
......@@ -28,8 +28,8 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 43
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_MINOR 44
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
......
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