Commit 6cabb679 authored by Derek Buitenhuis's avatar Derek Buitenhuis Committed by Michael Niedermayer

ZeroCodec Decoder

An obscure Japanese lossless video codec, originally intended
for use with a remote desktop application.
Signed-off-by: 's avatarDerek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent bae053fc
......@@ -16,6 +16,7 @@ version next:
- swapuv filter
- bbox filter
- XBM encoder
- ZeroCodec decoder
version 0.10:
......
......@@ -244,6 +244,7 @@ Codecs:
xan.c Mike Melanson
xl.c Kostya Shishkov
xvmc.c Ivan Kalvachev
zerocodec.c Derek Buitenhuis
zmbv* Kostya Shishkov
Hardware acceleration:
......
......@@ -1527,6 +1527,7 @@ wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
wmv3image_decoder_select="wmv3_decoder"
zerocodec_decoder_select="zlib"
zlib_decoder_select="zlib"
zlib_encoder_select="zlib"
zmbv_decoder_select="zlib"
......
......@@ -351,6 +351,7 @@ library:
@item eXtended BINary text (XBIN) @tab @tab X
@item YUV4MPEG pipe @tab X @tab X
@item Psygnosis YOP @tab @tab X
@item ZeroCodec Lossless Video @tab @tab X
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
......
......@@ -493,6 +493,7 @@ OBJS-$(CONFIG_Y41P_ENCODER) += y41penc.o
OBJS-$(CONFIG_YOP_DECODER) += yop.o
OBJS-$(CONFIG_YUV4_DECODER) += yuv4dec.o
OBJS-$(CONFIG_YUV4_ENCODER) += yuv4enc.o
OBJS-$(CONFIG_ZEROCODEC_DECODER) += zerocodec.o
OBJS-$(CONFIG_ZLIB_DECODER) += lcldec.o
OBJS-$(CONFIG_ZLIB_ENCODER) += lclenc.o
OBJS-$(CONFIG_ZMBV_DECODER) += zmbv.o
......
......@@ -255,6 +255,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (Y41P, y41p);
REGISTER_DECODER (YOP, yop);
REGISTER_ENCDEC (YUV4, yuv4);
REGISTER_DECODER (ZEROCODEC, zerocodec);
REGISTER_ENCDEC (ZLIB, zlib);
REGISTER_ENCDEC (ZMBV, zmbv);
......
......@@ -248,6 +248,7 @@ enum CodecID {
CODEC_ID_XWD,
CODEC_ID_CDXL,
CODEC_ID_XBM,
CODEC_ID_ZEROCODEC,
CODEC_ID_Y41P = MKBETAG('Y','4','1','P'),
CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'),
CODEC_ID_AVRP = MKBETAG('A','V','R','P'),
......
/*
* ZeroCodec Decoder
*
* Copyright (c) 2012, Derek Buitenhuis
*
* This file is part of FFMpeg.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <zlib.h>
#include "avcodec.h"
typedef struct {
AVFrame previous_frame;
z_stream zstream;
int size;
} ZeroCodecContext;
static int zerocodec_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *avpkt)
{
ZeroCodecContext *zc = avctx->priv_data;
AVFrame *pic = avctx->coded_frame;
AVFrame *prev_pic = &zc->previous_frame;
z_stream *zstream = &zc->zstream;
uint8_t *prev, *dst;
int i, j, zret;
pic->reference = 3;
if (avctx->get_buffer(avctx, pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
return AVERROR(ENOMEM);
}
zret = inflateReset(zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not reset inflate: %d\n", zret);
return AVERROR(EINVAL);
}
zstream->next_in = avpkt->data;
zstream->avail_in = avpkt->size;
prev = prev_pic->data[0];
dst = pic->data[0];
/**
* ZeroCodec has very simple interframe compression. If a value
* is the same as the previous frame, set it to 0.
*/
if (avpkt->flags & AV_PKT_FLAG_KEY) {
pic->key_frame = 1;
pic->pict_type = AV_PICTURE_TYPE_I;
for (i = 0; i < avctx->height; i++) {
zstream->next_out = dst;
zstream->avail_out = avctx->width << 1;
zret = inflate(zstream, Z_SYNC_FLUSH);
if (zret != Z_OK && zret != Z_STREAM_END) {
av_log(avctx, AV_LOG_ERROR, "Inflate failed with return code: %d\n", zret);
return AVERROR(EINVAL);
}
dst += pic->linesize[0];
}
} else {
pic->key_frame = 0;
pic->pict_type = AV_PICTURE_TYPE_P;
for (i = 0; i < avctx->height; i++) {
zstream->next_out = dst;
zstream->avail_out = avctx->width << 1;
zret = inflate(zstream, Z_SYNC_FLUSH);
if (zret != Z_OK && zret != Z_STREAM_END) {
av_log(avctx, AV_LOG_ERROR, "Inflate failed with return code: %d\n", zret);
return AVERROR(EINVAL);
}
for (j = 0; j < avctx->width << 1; j++)
dst[j] += prev[j] & -!dst[j];
prev += prev_pic->linesize[0];
dst += pic->linesize[0];
}
}
/* Release the previous buffer if need be */
if (prev_pic->data[0])
avctx->release_buffer(avctx, prev_pic);
/* Store the previouse frame for use later */
*prev_pic = *pic;
*data_size = sizeof(AVFrame);
*(AVFrame *)data = *pic;
return avpkt->size;
}
static av_cold int zerocodec_decode_close(AVCodecContext *avctx)
{
ZeroCodecContext *zc = avctx->priv_data;
AVFrame *prev_pic = &zc->previous_frame;
inflateEnd(&zc->zstream);
/* Release last frame */
if (prev_pic->data[0])
avctx->release_buffer(avctx, prev_pic);
av_freep(&avctx->coded_frame);
return 0;
}
static av_cold int zerocodec_decode_init(AVCodecContext *avctx)
{
ZeroCodecContext *zc = avctx->priv_data;
z_stream *zstream = &zc->zstream;
int zret;
avctx->pix_fmt = PIX_FMT_UYVY422;
avctx->bits_per_raw_sample = 8;
zc->size = avpicture_get_size(avctx->pix_fmt,
avctx->width, avctx->height);
zstream->zalloc = Z_NULL;
zstream->zfree = Z_NULL;
zstream->opaque = Z_NULL;
zret = inflateInit(zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not initialize inflate: %d\n", zret);
return AVERROR(ENOMEM);
}
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate frame buffer.\n");
zerocodec_decode_close(avctx);
return AVERROR(ENOMEM);
}
return 0;
}
AVCodec ff_zerocodec_decoder = {
.type = AVMEDIA_TYPE_VIDEO,
.name = "zerocodec",
.id = CODEC_ID_ZEROCODEC,
.priv_data_size = sizeof(ZeroCodecContext),
.init = zerocodec_decode_init,
.decode = zerocodec_decode_frame,
.close = zerocodec_decode_close,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("ZeroCodec Lossless Video"),
};
......@@ -298,6 +298,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ CODEC_ID_VBLE, MKTAG('V', 'B', 'L', 'E') },
{ CODEC_ID_ESCAPE130, MKTAG('E', '1', '3', '0') },
{ CODEC_ID_DXTORY, MKTAG('x', 't', 'o', 'r') },
{ CODEC_ID_ZEROCODEC, MKTAG('Z', 'E', 'C', 'O') },
{ CODEC_ID_Y41P, MKTAG('Y', '4', '1', 'P') },
{ CODEC_ID_NONE, 0 }
};
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment