mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
LucasArts SMUSH VIMA audio decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
parent
5a90e55ece
commit
b18357326c
@ -830,6 +830,8 @@ following image formats are supported:
|
||||
@item TrueHD @tab @tab X
|
||||
@tab Used in HD-DVD and Blu-Ray discs.
|
||||
@item TwinVQ (VQF flavor) @tab @tab X
|
||||
@item VIMA
|
||||
@tab Used in LucasArts SMUSH animations.
|
||||
@item Vorbis @tab E @tab X
|
||||
@tab A native but very primitive encoder exists.
|
||||
@item WavPack @tab @tab X
|
||||
|
@ -612,6 +612,7 @@ OBJS-$(CONFIG_ADPCM_THP_DECODER) += adpcm.o adpcm_data.o
|
||||
OBJS-$(CONFIG_ADPCM_XA_DECODER) += adpcm.o adpcm_data.o
|
||||
OBJS-$(CONFIG_ADPCM_YAMAHA_DECODER) += adpcm.o adpcm_data.o
|
||||
OBJS-$(CONFIG_ADPCM_YAMAHA_ENCODER) += adpcmenc.o adpcm_data.o
|
||||
OBJS-$(CONFIG_VIMA_DECODER) += vima.o adpcm_data.o
|
||||
|
||||
# libavformat dependencies
|
||||
OBJS-$(CONFIG_ADTS_MUXER) += mpeg4audio.o
|
||||
|
@ -395,6 +395,7 @@ void avcodec_register_all(void)
|
||||
REGISTER_DECODER (ADPCM_THP, adpcm_thp);
|
||||
REGISTER_DECODER (ADPCM_XA, adpcm_xa);
|
||||
REGISTER_ENCDEC (ADPCM_YAMAHA, adpcm_yamaha);
|
||||
REGISTER_DECODER (VIMA, vima);
|
||||
|
||||
/* subtitles */
|
||||
REGISTER_ENCDEC (ASS, ass);
|
||||
|
@ -332,6 +332,7 @@ enum CodecID {
|
||||
CODEC_ID_ADPCM_IMA_ISS,
|
||||
CODEC_ID_ADPCM_G722,
|
||||
CODEC_ID_ADPCM_IMA_APC,
|
||||
CODEC_ID_VIMA = MKBETAG('V','I','M','A'),
|
||||
|
||||
/* AMR */
|
||||
CODEC_ID_AMR_NB = 0x12000,
|
||||
|
@ -27,7 +27,7 @@
|
||||
*/
|
||||
|
||||
#define LIBAVCODEC_VERSION_MAJOR 54
|
||||
#define LIBAVCODEC_VERSION_MINOR 27
|
||||
#define LIBAVCODEC_VERSION_MINOR 28
|
||||
#define LIBAVCODEC_VERSION_MICRO 100
|
||||
|
||||
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
|
||||
|
236
libavcodec/vima.c
Normal file
236
libavcodec/vima.c
Normal file
@ -0,0 +1,236 @@
|
||||
/*
|
||||
* LucasArt VIMA decoder
|
||||
* Copyright (c) 2012 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
|
||||
*/
|
||||
|
||||
#include "libavutil/audioconvert.h"
|
||||
#include "avcodec.h"
|
||||
#include "get_bits.h"
|
||||
#include "adpcm_data.h"
|
||||
|
||||
typedef struct {
|
||||
AVFrame frame;
|
||||
uint16_t predict_table[5786 * 2];
|
||||
} VimaContext;
|
||||
|
||||
static const uint8_t size_table[] =
|
||||
{
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
|
||||
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
|
||||
};
|
||||
|
||||
static const int8_t index_table1[] =
|
||||
{
|
||||
-1, 4, -1, 4
|
||||
};
|
||||
|
||||
static const int8_t index_table2[] =
|
||||
{
|
||||
-1, -1, 2, 6, -1, -1, 2, 6
|
||||
};
|
||||
|
||||
static const int8_t index_table3[] =
|
||||
{
|
||||
-1, -1, -1, -1, 1, 2, 4, 6,
|
||||
-1, -1, -1, -1, 1, 2, 4, 6
|
||||
};
|
||||
|
||||
static const int8_t index_table4[] =
|
||||
{
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 2, 2, 4, 5, 6,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 2, 2, 4, 5, 6
|
||||
};
|
||||
|
||||
static const int8_t index_table5[] =
|
||||
{
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 1, 1, 2, 2, 2,
|
||||
2, 4, 4, 4, 5, 5, 6, 6,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 1, 1, 2, 2, 2,
|
||||
2, 4, 4, 4, 5, 5, 6, 6
|
||||
};
|
||||
|
||||
static const int8_t index_table6[] =
|
||||
{
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 1, 1, 1, 1, 1,
|
||||
1, 1, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 6, 6, 6, 6,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
1, 1, 1, 1, 1, 1, 1, 1,
|
||||
1, 1, 2, 2, 2, 2, 2, 2,
|
||||
2, 2, 4, 4, 4, 4, 4, 4,
|
||||
5, 5, 5, 5, 6, 6, 6, 6
|
||||
};
|
||||
|
||||
static const int8_t* const step_index_tables[] =
|
||||
{
|
||||
index_table1, index_table2, index_table3,
|
||||
index_table4, index_table5, index_table6
|
||||
};
|
||||
|
||||
static av_cold int decode_init(AVCodecContext *avctx)
|
||||
{
|
||||
VimaContext *vima = avctx->priv_data;
|
||||
int start_pos;
|
||||
|
||||
for (start_pos = 0; start_pos < 64; start_pos++) {
|
||||
unsigned int dest_pos, table_pos;
|
||||
|
||||
for (table_pos = 0, dest_pos = start_pos;
|
||||
table_pos < FF_ARRAY_ELEMS(ff_adpcm_step_table);
|
||||
table_pos++, dest_pos += 64) {
|
||||
int put = 0, count, table_value;
|
||||
|
||||
table_value = ff_adpcm_step_table[table_pos];
|
||||
for (count = 32; count != 0; count >>= 1) {
|
||||
if (start_pos & count)
|
||||
put += table_value;
|
||||
table_value >>= 1;
|
||||
}
|
||||
vima->predict_table[dest_pos] = put;
|
||||
}
|
||||
}
|
||||
|
||||
avcodec_get_frame_defaults(&vima->frame);
|
||||
avctx->coded_frame = &vima->frame;
|
||||
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decode_frame(AVCodecContext *avctx, void *data,
|
||||
int *got_frame_ptr, AVPacket *pkt)
|
||||
{
|
||||
GetBitContext gb;
|
||||
VimaContext *vima = avctx->priv_data;
|
||||
int16_t pcm_data[2];
|
||||
uint32_t samples;
|
||||
int8_t channel_hint[2];
|
||||
int ret, chan, channels = 1;
|
||||
|
||||
init_get_bits(&gb, pkt->data, pkt->size * 8);
|
||||
|
||||
if (pkt->size < 13)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
samples = get_bits_long(&gb, 32);
|
||||
if (samples == 0xffffffff) {
|
||||
skip_bits_long(&gb, 32);
|
||||
samples = get_bits_long(&gb, 32);
|
||||
}
|
||||
|
||||
if (samples > pkt->size * 2)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
channel_hint[0] = get_sbits(&gb, 8);
|
||||
if (channel_hint[0] & 0x80) {
|
||||
channel_hint[0] = ~channel_hint[0];
|
||||
channels = 2;
|
||||
}
|
||||
avctx->channels = channels;
|
||||
avctx->channel_layout = (channels == 2) ? AV_CH_LAYOUT_STEREO :
|
||||
AV_CH_LAYOUT_MONO;
|
||||
pcm_data[0] = get_sbits(&gb, 16);
|
||||
if (channels > 1) {
|
||||
channel_hint[1] = get_sbits(&gb, 8);
|
||||
pcm_data[1] = get_sbits(&gb, 16);
|
||||
}
|
||||
|
||||
vima->frame.nb_samples = samples;
|
||||
if ((ret = avctx->get_buffer(avctx, &vima->frame)) < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
for (chan = 0; chan < channels; chan++) {
|
||||
uint16_t *dest = (uint16_t*)vima->frame.data[0] + chan;
|
||||
int step_index = channel_hint[chan];
|
||||
int output = pcm_data[chan];
|
||||
int sample;
|
||||
|
||||
for (sample = 0; sample < samples; sample++) {
|
||||
int lookup_size, lookup, highbit, lowbits;
|
||||
|
||||
step_index = av_clip(step_index, 0, 88);
|
||||
lookup_size = size_table[step_index];
|
||||
lookup = get_bits(&gb, lookup_size);
|
||||
highbit = 1 << (lookup_size - 1);
|
||||
lowbits = highbit - 1;
|
||||
|
||||
if (lookup & highbit)
|
||||
lookup ^= highbit;
|
||||
else
|
||||
highbit = 0;
|
||||
|
||||
if (lookup == lowbits) {
|
||||
output = get_sbits(&gb, 16);
|
||||
} else {
|
||||
int predict_index, diff;
|
||||
|
||||
predict_index = (lookup << (7 - lookup_size)) | (step_index << 6);
|
||||
predict_index = av_clip(predict_index, 0, 5785);
|
||||
diff = vima->predict_table[predict_index];
|
||||
if (lookup)
|
||||
diff += ff_adpcm_step_table[step_index] >> (lookup_size - 1);
|
||||
if (highbit)
|
||||
diff = -diff;
|
||||
|
||||
output = av_clip_int16(output + diff);
|
||||
}
|
||||
|
||||
*dest = output;
|
||||
dest += channels;
|
||||
|
||||
step_index += step_index_tables[lookup_size - 2][lookup];
|
||||
}
|
||||
}
|
||||
|
||||
*got_frame_ptr = 1;
|
||||
*(AVFrame *)data = vima->frame;
|
||||
|
||||
return pkt->size;
|
||||
}
|
||||
|
||||
AVCodec ff_vima_decoder = {
|
||||
.name = "vima",
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
.id = CODEC_ID_VIMA,
|
||||
.priv_data_size = sizeof(VimaContext),
|
||||
.init = decode_init,
|
||||
.decode = decode_frame,
|
||||
.capabilities = CODEC_CAP_DR1,
|
||||
.long_name = NULL_IF_CONFIG_SMALL("LucasArts VIMA audio"),
|
||||
};
|
Loading…
Reference in New Issue
Block a user