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avcodec: add FTR audio decoder and parser

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This commit is contained in:
Paul B Mahol 2022-08-30 17:14:46 +02:00
parent 2f9fa7e3e9
commit a166b8a19b
11 changed files with 333 additions and 1 deletions
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2
libavcodec/Makefile
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@ -361,6 +361,7 @@ OBJS-$(CONFIG_FMVC_DECODER) += fmvc.o
OBJS-$(CONFIG_FOURXM_DECODER) += 4xm.o
OBJS-$(CONFIG_FRAPS_DECODER) += fraps.o
OBJS-$(CONFIG_FRWU_DECODER) += frwu.o
OBJS-$(CONFIG_FTR_DECODER) += ftr.o
OBJS-$(CONFIG_G2M_DECODER) += g2meet.o elsdec.o mjpegdec_common.o
OBJS-$(CONFIG_G723_1_DECODER) += g723_1dec.o g723_1.o \
acelp_vectors.o celp_filters.o celp_math.o
@ -1133,6 +1134,7 @@ OBJS-$(CONFIG_DVBSUB_PARSER) += dvbsub_parser.o
OBJS-$(CONFIG_DVD_NAV_PARSER) += dvd_nav_parser.o
OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsub_parser.o
OBJS-$(CONFIG_FLAC_PARSER) += flac_parser.o flacdata.o flac.o
OBJS-$(CONFIG_FTR_PARSER) += ftr_parser.o
OBJS-$(CONFIG_G723_1_PARSER) += g723_1_parser.o
OBJS-$(CONFIG_G729_PARSER) += g729_parser.o
OBJS-$(CONFIG_GIF_PARSER) += gif_parser.o

1
libavcodec/allcodecs.c
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@ -468,6 +468,7 @@ extern const FFCodec ff_fastaudio_decoder;
extern const FFCodec ff_ffwavesynth_decoder;
extern const FFCodec ff_flac_encoder;
extern const FFCodec ff_flac_decoder;
extern const FFCodec ff_ftr_decoder;
extern const FFCodec ff_g723_1_encoder;
extern const FFCodec ff_g723_1_decoder;
extern const FFCodec ff_g729_decoder;

7
libavcodec/codec_desc.c
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@ -3311,6 +3311,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Marian's A-pac audio"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
},
{
.id = AV_CODEC_ID_FTR,
.type = AVMEDIA_TYPE_AUDIO,
.name = "ftr",
.long_name = NULL_IF_CONFIG_SMALL("FTR Voice"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
/* subtitle codecs */
{

1
libavcodec/codec_id.h
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@ -530,6 +530,7 @@ enum AVCodecID {
AV_CODEC_ID_BONK,
AV_CODEC_ID_MISC4,
AV_CODEC_ID_APAC,
AV_CODEC_ID_FTR,
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.

208
libavcodec/ftr.c Normal file
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@ -0,0 +1,208 @@
/*
* 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 "adts_header.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "decode.h"
typedef struct FTRContext {
AVCodecContext *aac_avctx[64]; // wrapper context for AAC
int nb_context;
AVPacket *packet;
AVFrame *frame;
} FTRContext;
static av_cold int ftr_init(AVCodecContext *avctx)
{
FTRContext *s = avctx->priv_data;
const AVCodec *codec;
int ret;
if (avctx->ch_layout.nb_channels > 64 ||
avctx->ch_layout.nb_channels <= 0)
return AVERROR(ENOTSUP);
s->packet = av_packet_alloc();
if (!s->packet)
return AVERROR(ENOMEM);
s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM);
s->nb_context = avctx->ch_layout.nb_channels;
codec = avcodec_find_decoder(AV_CODEC_ID_AAC);
if (!codec)
return AVERROR_BUG;
for (int i = 0; i < s->nb_context; i++) {
s->aac_avctx[i] = avcodec_alloc_context3(codec);
if (!s->aac_avctx[i])
return AVERROR(ENOMEM);
ret = avcodec_open2(s->aac_avctx[i], codec, NULL);
if (ret < 0)
return ret;
}
avctx->sample_fmt = s->aac_avctx[0]->sample_fmt;
if (!av_sample_fmt_is_planar(avctx->sample_fmt))
return AVERROR(EINVAL);
return 0;
}
static int ftr_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int *got_frame, AVPacket *avpkt)
{
FTRContext *s = avctx->priv_data;
GetBitContext gb;
int ret, ch_offset = 0;
ret = init_get_bits8(&gb, avpkt->data, avpkt->size);
if (ret < 0)
return ret;
frame->nb_samples = 0;
for (int i = 0; i < s->nb_context; i++) {
AVCodecContext *codec_avctx = s->aac_avctx[i];
GetBitContext gb2 = gb;
AACADTSHeaderInfo hdr_info;
int size;
if (get_bits_left(&gb) < 64)
return AVERROR_INVALIDDATA;
memset(&hdr_info, 0, sizeof(hdr_info));
size = ff_adts_header_parse(&gb2, &hdr_info);
if (size <= 0 || size * 8 > get_bits_left(&gb))
return AVERROR_INVALIDDATA;
if (size > s->packet->size) {
ret = av_grow_packet(s->packet, size - s->packet->size);
if (ret < 0)
return ret;
}
ret = av_packet_make_writable(s->packet);
if (ret < 0)
return ret;
memcpy(s->packet->data, avpkt->data + (get_bits_count(&gb) >> 3), size);
s->packet->size = size;
if (size > 12) {
uint8_t *buf = s->packet->data;
if (buf[3] & 0x20) {
int tmp = buf[8];
buf[ 9] = ~buf[9];
buf[11] = ~buf[11];
buf[12] = ~buf[12];
buf[ 8] = ~buf[10];
buf[10] = ~tmp;
}
}
ret = avcodec_send_packet(codec_avctx, s->packet);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
return ret;
}
ret = avcodec_receive_frame(codec_avctx, s->frame);
if (ret < 0)
return ret;
if (!avctx->sample_rate) {
avctx->sample_rate = codec_avctx->sample_rate;
} else {
if (avctx->sample_rate != codec_avctx->sample_rate)
return AVERROR_INVALIDDATA;
}
if (!frame->nb_samples) {
frame->nb_samples = s->frame->nb_samples;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
} else {
if (frame->nb_samples != s->frame->nb_samples)
return AVERROR_INVALIDDATA;
}
skip_bits_long(&gb, size * 8);
if (ch_offset + s->frame->ch_layout.nb_channels > avctx->ch_layout.nb_channels)
return AVERROR_INVALIDDATA;
if (avctx->sample_fmt != codec_avctx->sample_fmt)
return AVERROR_INVALIDDATA;
for (int ch = 0; ch < s->frame->ch_layout.nb_channels; ch++)
memcpy(frame->extended_data[ch_offset + ch],
s->frame->extended_data[ch],
av_get_bytes_per_sample(codec_avctx->sample_fmt) * s->frame->nb_samples);
ch_offset += s->frame->ch_layout.nb_channels;
if (ch_offset >= avctx->ch_layout.nb_channels)
break;
}
*got_frame = 1;
return get_bits_count(&gb) >> 3;
}
static void ftr_flush(AVCodecContext *avctx)
{
FTRContext *s = avctx->priv_data;
for (int i = 0; i < s->nb_context; i++)
avcodec_flush_buffers(s->aac_avctx[i]);
}
static av_cold int ftr_close(AVCodecContext *avctx)
{
FTRContext *s = avctx->priv_data;
for (int i = 0; i < s->nb_context; i++)
avcodec_free_context(&s->aac_avctx[i]);
av_packet_free(&s->packet);
av_frame_free(&s->frame);
return 0;
}
const FFCodec ff_ftr_decoder = {
.p.name = "ftr",
.p.long_name = NULL_IF_CONFIG_SMALL("FTR Voice"),
.p.type = AVMEDIA_TYPE_AUDIO,
.p.id = AV_CODEC_ID_FTR,
.init = ftr_init,
FF_CODEC_DECODE_CB(ftr_decode_frame),
.close = ftr_close,
.flush = ftr_flush,
.priv_data_size = sizeof(FTRContext),
.p.capabilities = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};

107
libavcodec/ftr_parser.c Normal file
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@ -0,0 +1,107 @@
/*
* FTR parser
* Copyright (c) 2022 Paul B Mahol
*
* 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
*/
/**
* @file
* FTR parser
*/
#include "parser.h"
#include "get_bits.h"
#include "adts_header.h"
#include "adts_parser.h"
#include "mpeg4audio.h"
typedef struct FTRParseContext {
ParseContext pc;
int skip;
int split;
int frame_index;
} FTRParseContext;
static int ftr_parse(AVCodecParserContext *s, AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE];
FTRParseContext *ftr = s->priv_data;
uint64_t state = ftr->pc.state64;
int next = END_NOT_FOUND;
GetBitContext bits;
AACADTSHeaderInfo hdr;
int size;
*poutbuf_size = 0;
*poutbuf = NULL;
if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
next = buf_size;
} else {
for (int i = 0; i < buf_size; i++) {
if (ftr->skip > 0) {
ftr->skip--;
if (ftr->skip == 0 && ftr->split) {
ftr->split = 0;
next = i;
s->duration = 1024;
s->key_frame = 1;
break;
} else if (ftr->skip > 0) {
continue;
}
}
state = (state << 8) | buf[i];
AV_WB64(tmp, state);
init_get_bits(&bits, tmp + 8 - AV_AAC_ADTS_HEADER_SIZE,
AV_AAC_ADTS_HEADER_SIZE * 8);
if ((size = ff_adts_header_parse(&bits, &hdr)) > 0) {
ftr->skip = size - 6;
ftr->frame_index += ff_mpeg4audio_channels[hdr.chan_config];
if (ftr->frame_index >= avctx->ch_layout.nb_channels) {
ftr->frame_index = 0;
ftr->split = 1;
}
}
}
ftr->pc.state64 = state;
if (ff_combine_frame(&ftr->pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
}
*poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}
const AVCodecParser ff_ftr_parser = {
.codec_ids = { AV_CODEC_ID_FTR },
.priv_data_size = sizeof(FTRParseContext),
.parser_parse = ftr_parse,
.parser_close = ff_parse_close,
};

1
libavcodec/parsers.c
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@ -42,6 +42,7 @@ extern const AVCodecParser ff_dvbsub_parser;
extern const AVCodecParser ff_dvdsub_parser;
extern const AVCodecParser ff_dvd_nav_parser;
extern const AVCodecParser ff_flac_parser;
extern const AVCodecParser ff_ftr_parser;
extern const AVCodecParser ff_g723_1_parser;
extern const AVCodecParser ff_g729_parser;
extern const AVCodecParser ff_gif_parser;

1
libavcodec/utils.c
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@ -639,6 +639,7 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
case AV_CODEC_ID_MP2:
case AV_CODEC_ID_MUSEPACK7: return 1152;
case AV_CODEC_ID_AC3: return 1536;
case AV_CODEC_ID_FTR: return 1024;
}
if (sr > 0) {

2
libavcodec/version.h
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@ -29,7 +29,7 @@
#include "version_major.h"
#define LIBAVCODEC_VERSION_MINOR 45
#define LIBAVCODEC_VERSION_MINOR 46
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/avidec.c
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@ -923,6 +923,7 @@ static int avi_read_header(AVFormatContext *s)
ast->dshow_block_align = 0;
}
if ((st->codecpar->codec_id == AV_CODEC_ID_AAC ||
st->codecpar->codec_id == AV_CODEC_ID_FTR ||
st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
st->codecpar->codec_id == AV_CODEC_ID_MP2 ) && ast->dshow_block_align <= 4 && ast->dshow_block_align) {
av_log(s, AV_LOG_DEBUG, "overriding invalid dshow_block_align of %d\n", ast->dshow_block_align);

3
libavformat/riff.c
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@ -558,6 +558,7 @@ const AVCodecTag ff_codec_wav_tags[] = {
{ AV_CODEC_ID_WMALOSSLESS, 0x0163 },
{ AV_CODEC_ID_XMA1, 0x0165 },
{ AV_CODEC_ID_XMA2, 0x0166 },
{ AV_CODEC_ID_FTR, 0x0180 },
{ AV_CODEC_ID_ADPCM_CT, 0x0200 },
{ AV_CODEC_ID_DVAUDIO, 0x0215 },
{ AV_CODEC_ID_DVAUDIO, 0x0216 },
@ -584,8 +585,10 @@ const AVCodecTag ff_codec_wav_tags[] = {
{ AV_CODEC_ID_PCM_MULAW, 0x6c75 },
{ AV_CODEC_ID_AAC, 0x706d },
{ AV_CODEC_ID_AAC, 0x4143 },
{ AV_CODEC_ID_FTR, 0x4180 },
{ AV_CODEC_ID_XAN_DPCM, 0x594a },
{ AV_CODEC_ID_G729, 0x729A },
{ AV_CODEC_ID_FTR, 0x8180 },
{ AV_CODEC_ID_G723_1, 0xA100 }, /* Comverse Infosys Ltd. G723 1 */
{ AV_CODEC_ID_AAC, 0xA106 },
{ AV_CODEC_ID_SPEEX, 0xA109 },