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Merge commit '470cd0c5fe6337b6cb5276b3f84400999450fc1b'

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* commit '470cd0c5fe6337b6cb5276b3f84400999450fc1b':
  Add TrueMotion 2.0 Real Time decoder

Merged-by: Clément Bœsch <u@pkh.me>
This commit is contained in:
Clément Bœsch
2016-07-14 19:17:09 +02:00
parent 87e9cefa91 470cd0c5fe
commit 93c13886a2
2 changed files with 64 additions and 58 deletions
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2
doc/general.texi
View File

@@ -679,6 +679,8 @@ following image formats are supported:
@tab fourcc: DUCK
@item Duck TrueMotion 2.0 @tab @tab X
@tab fourcc: TM20
@item Duck TrueMotion 2.0 RT @tab @tab X
@tab fourcc: TR20
@item DV (Digital Video) @tab X @tab X
@item Dxtory capture format @tab @tab X
@item Feeble Files/ScummVM DXA @tab @tab X

120
libavcodec/truemotion2rt.c
View File

@@ -1,5 +1,5 @@
/*
* Duck TrueMotion 2.0 Real Time Decoder
* Duck TrueMotion 2.0 Real Time decoder
*
* This file is part of FFmpeg.
*
@@ -22,51 +22,68 @@
#include <stdlib.h>
#include <string.h>
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
typedef struct TrueMotion2RTContext {
GetBitContext gb;
const uint8_t *buf;
int size;
int delta_size;
int hscale;
} TrueMotion2RTContext;
static av_cold int decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
return 0;
}
static const int16_t delta_tab2[] = {
5, -7, 36, -36,
};
/* Returns the number of bytes consumed from the bytestream. Returns -1 if
* there was an error while decoding the header */
static int truemotion2rt_decode_header(AVCodecContext *avctx)
static const int16_t delta_tab3[] = {
2, -3, 8, -8, 18, -18, 36, -36,
};
static const int16_t delta_tab4[] = {
1, -1, 2, -3, 8, -8, 18, -18, 36, -36, 54, -54, 96, -96, 144, -144,
};
static const int16_t *const delta_tabs[] = {
delta_tab2, delta_tab3, delta_tab4,
};
/* Returns the number of bytes consumed from the bytestream, or
* AVERROR_INVALIDDATA if there was an error while decoding the header. */
static int truemotion2rt_decode_header(AVCodecContext *avctx, AVPacket *avpkt)
{
TrueMotion2RTContext *s = avctx->priv_data;
uint8_t header_buffer[128] = { 0 }; /* logical maximum size of the header */
int i, header_size;
int header_size;
uint8_t header_buffer[128] = { 0 }; /* logical maximum header size */
const uint8_t *buf = avpkt->data;
int size = avpkt->size;
int i;
header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
if (size < 1) {
av_log(avctx, AV_LOG_ERROR, "input packet too small (%d)\n", size);
return AVERROR_INVALIDDATA;
}
header_size = ((buf[0] >> 5) | (buf[0] << 3)) & 0x7f;
if (header_size < 10) {
av_log(avctx, AV_LOG_ERROR, "invalid header size (%d)\n", header_size);
return AVERROR_INVALIDDATA;
}
if (header_size + 1 > s->size) {
av_log(avctx, AV_LOG_ERROR, "Input packet too small.\n");
if (header_size + 1 > size) {
av_log(avctx, AV_LOG_ERROR, "input packet too small (%d)\n", size);
return AVERROR_INVALIDDATA;
}
/* unscramble the header bytes with a XOR operation */
for (i = 1; i < header_size; i++)
header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
header_buffer[i - 1] = buf[i] ^ buf[i + 1];
s->delta_size = header_buffer[1];
s->hscale = 1 + !!header_buffer[3];
@@ -76,47 +93,30 @@ static int truemotion2rt_decode_header(AVCodecContext *avctx)
avctx->height = AV_RL16(header_buffer + 5);
avctx->width = AV_RL16(header_buffer + 7);
av_log(avctx, AV_LOG_DEBUG, "Header size: %d\n", header_size);
return header_size;
}
static const int16_t delta_tab4[] = {
1, -1, 2, -3, 8, -8, 18, -18, 36, -36, 54, -54, 96, -96, 144, -144
};
static const int16_t delta_tab3[] = {
2, -3, 8, -8, 18, -18, 36, -36
};
static const int16_t delta_tab2[] = {
5, -7, 36, -36
};
static const int16_t *const delta_tabs[] = {
delta_tab2, delta_tab3, delta_tab4,
};
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
static int truemotion2rt_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
TrueMotion2RTContext *s = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int ret, buf_size = avpkt->size;
AVFrame * const p = data;
GetBitContext *gb = &s->gb;
uint8_t *dst;
int x, y, delta_mode;
int ret;
s->buf = buf;
s->size = buf_size;
if ((ret = truemotion2rt_decode_header(avctx)) < 0)
ret = truemotion2rt_decode_header(avctx, avpkt);
if (ret < 0)
return ret;
if ((ret = init_get_bits8(gb, buf + ret, buf_size - ret)) < 0)
ret = init_get_bits8(gb, avpkt->data + ret, avpkt->size - ret);
if (ret < 0)
return ret;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
ret = ff_get_buffer(avctx, p, 0);
if (ret < 0)
return ret;
skip_bits(gb, 32);
@@ -134,9 +134,8 @@ static int decode_frame(AVCodecContext *avctx,
if (s->hscale > 1) {
dst = p->data[0];
for (y = 0; y < avctx->height; y++) {
for (x = 1; x < avctx->width; x += s->hscale) {
for (x = 1; x < avctx->width; x += s->hscale)
dst[x] = dst[x - 1];
}
dst += p->linesize[0];
}
}
@@ -161,9 +160,8 @@ static int decode_frame(AVCodecContext *avctx,
if (s->hscale > 1) {
dst = p->data[1];
for (y = 0; y < avctx->height >> 2; y++) {
for (x = 1; x < avctx->width >> 2; x += s->hscale) {
for (x = 1; x < avctx->width >> 2; x += s->hscale)
dst[x] = dst[x - 1];
}
dst += p->linesize[1];
}
}
@@ -188,9 +186,8 @@ static int decode_frame(AVCodecContext *avctx,
if (s->hscale > 1) {
dst = p->data[2];
for (y = 0; y < avctx->height >> 2; y++) {
for (x = 1; x < avctx->width >> 2; x += s->hscale) {
for (x = 1; x < avctx->width >> 2; x += s->hscale)
dst[x] = dst[x - 1];
}
dst += p->linesize[2];
}
}
@@ -204,9 +201,15 @@ static int decode_frame(AVCodecContext *avctx,
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
*got_frame = 1;
*got_frame = 1;
return buf_size;
return avpkt->size;
}
static av_cold int truemotion2rt_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
return 0;
}
AVCodec ff_truemotion2rt_decoder = {
@@ -215,7 +218,8 @@ AVCodec ff_truemotion2rt_decoder = {
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_TRUEMOTION2RT,
.priv_data_size = sizeof(TrueMotion2RTContext),
.init = decode_init,
.decode = decode_frame,
.init = truemotion2rt_decode_init,
.decode = truemotion2rt_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};