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Merge commit '189157c3fc8eeb691e3684b09d971eb5ddb47d5b'

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* commit '189157c3fc8eeb691e3684b09d971eb5ddb47d5b':
  Add ClearVideo decoder

See a63496cc88

Merged-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2017-10-30 15:46:23 -03:00
commit 269ed71e93
2 changed files with 31 additions and 26 deletions
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1
doc/general.texi
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@ -365,6 +365,7 @@ library:
@item Interplay MVE @tab @tab X
@tab Format used in various Interplay computer games.
@item Iterated Systems ClearVideo @tab @tab X
@tab I-frames only
@item IV8 @tab @tab X
@tab A format generated by IndigoVision 8000 video server.
@item IVF (On2) @tab X @tab X

56
libavcodec/clearvideo.c
View File

@ -25,10 +25,10 @@
*/
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "get_bits.h"
#include "bytestream.h"
#define NUM_DC_CODES 127
#define NUM_AC_CODES 103
@ -129,6 +129,7 @@ typedef struct CLVContext {
int luma_dc_quant, chroma_dc_quant, ac_quant;
DECLARE_ALIGNED(16, int16_t, block)[64];
int top_dc[3], left_dc[4];
int iframes_warning;
} CLVContext;
static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
@ -179,12 +180,12 @@ static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
}
#define DCT_TEMPLATE(blk, step, bias, shift, dshift, OP) \
const int t0 = OP( 2841 * blk[1 * step] + 565 * blk[7 * step]); \
const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
const int t2 = OP( 1609 * blk[5 * step] + 2408 * blk[3 * step]); \
const int t3 = OP( 2408 * blk[5 * step] - 1609 * blk[3 * step]); \
const int t4 = OP( 1108 * blk[2 * step] - 2676 * blk[6 * step]); \
const int t5 = OP( 2676 * blk[2 * step] + 1108 * blk[6 * step]); \
const int t0 = OP(2841 * blk[1 * step] + 565 * blk[7 * step]); \
const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
const int t2 = OP(1609 * blk[5 * step] + 2408 * blk[3 * step]); \
const int t3 = OP(2408 * blk[5 * step] - 1609 * blk[3 * step]); \
const int t4 = OP(1108 * blk[2 * step] - 2676 * blk[6 * step]); \
const int t5 = OP(2676 * blk[2 * step] + 1108 * blk[6 * step]); \
const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
const int t8 = t0 + t2; \
@ -225,9 +226,7 @@ static void clv_dct(int16_t *block)
static int decode_mb(CLVContext *c, int x, int y)
{
int i;
int has_ac[6];
int off;
int i, has_ac[6], off;
for (i = 0; i < 6; i++)
has_ac[i] = get_bits1(&c->gb);
@ -247,7 +246,8 @@ static int decode_mb(CLVContext *c, int x, int y)
clv_dct(c->block);
if (i == 2)
off += c->pic->linesize[0] * 8;
c->idsp.put_pixels_clamped(c->block, c->pic->data[0] + off + (i & 1) * 8,
c->idsp.put_pixels_clamped(c->block,
c->pic->data[0] + off + (i & 1) * 8,
c->pic->linesize[0]);
}
@ -279,12 +279,11 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
CLVContext *c = avctx->priv_data;
GetByteContext gb;
uint32_t frame_type;
int i, j;
int ret;
int i, j, ret;
int mb_ret = 0;
bytestream2_init(&gb, buf, buf_size);
if (avctx->codec_tag == MKTAG('C','L','V','1')) {
if (avctx->codec_tag == MKTAG('C', 'L', 'V', '1')) {
int skip = bytestream2_get_byte(&gb);
bytestream2_skip(&gb, (skip + 1) * 8);
}
@ -301,7 +300,8 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
return ret;
c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I
: AV_PICTURE_TYPE_P;
bytestream2_get_be32(&gb); // frame size;
c->ac_quant = bytestream2_get_byte(&gb);
@ -309,7 +309,7 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
c->chroma_dc_quant = 32;
if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
(buf_size - bytestream2_tell(&gb)))) < 0)
buf_size - bytestream2_tell(&gb))) < 0)
return ret;
for (i = 0; i < 3; i++)
@ -330,6 +330,10 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
*got_frame = 1;
} else {
if (!c->iframes_warning)
avpriv_report_missing_feature(avctx, "Non-I-frames in Clearvideo");
c->iframes_warning = 1;
return AVERROR_PATCHWELCOME;
}
return mb_ret < 0 ? mb_ret : buf_size;
@ -337,20 +341,19 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
static av_cold int clv_decode_init(AVCodecContext *avctx)
{
CLVContext * const c = avctx->priv_data;
CLVContext *const c = avctx->priv_data;
int ret;
c->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
c->pic = av_frame_alloc();
c->avctx = avctx;
c->mb_width = FFALIGN(avctx->width, 16) >> 4;
c->mb_height = FFALIGN(avctx->height, 16) >> 4;
c->iframes_warning = 0;
c->pic = av_frame_alloc();
if (!c->pic)
return AVERROR(ENOMEM);
c->mb_width = FFALIGN(avctx->width, 16) >> 4;
c->mb_height = FFALIGN(avctx->height, 16) >> 4;
ff_idctdsp_init(&c->idsp, avctx);
ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
clv_dc_bits, 1, 1,
@ -373,7 +376,7 @@ static av_cold int clv_decode_init(AVCodecContext *avctx)
static av_cold int clv_decode_end(AVCodecContext *avctx)
{
CLVContext * const c = avctx->priv_data;
CLVContext *const c = avctx->priv_data;
av_frame_free(&c->pic);
@ -385,6 +388,7 @@ static av_cold int clv_decode_end(AVCodecContext *avctx)
AVCodec ff_clearvideo_decoder = {
.name = "clearvideo",
.long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_CLEARVIDEO,
.priv_data_size = sizeof(CLVContext),
@ -392,5 +396,5 @@ AVCodec ff_clearvideo_decoder = {
.close = clv_decode_end,
.decode = clv_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};