New fringe codecs: WC3/Xan video, Xan DPCM, DK3 & DK4 ADPCM
Originally committed as revision 2217 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson
parent
0a5f92a120
commit
9937e686fe
@ -18,7 +18,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \
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ratecontrol.o adpcm.o eval.o dv.o error_resilience.o \
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fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \
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vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o \
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roqvideo.o dpcm.o interplayvideo.o
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roqvideo.o dpcm.o interplayvideo.o xan.o
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ifeq ($(AMR_NB),yes)
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ifeq ($(AMR_NB_FIXED),yes)
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@ -1,6 +1,6 @@
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/*
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* ADPCM codecs
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* Copyright (c) 2001 Fabrice Bellard.
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* Copyright (c) 2001-2003 The ffmpeg Project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -22,11 +22,13 @@
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* @file adpcm.c
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* ADPCM codecs.
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* First version by Francois Revol revol@free.fr
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* Fringe ADPCM codecs (e.g., DK3 and DK4)
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* by Mike Melanson (melanson@pcisys.net)
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*
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* Features and limitations:
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*
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* Reference documents:
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* http://www.pcisys.net/~melanson/codecs/adpcm.txt
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* http://www.pcisys.net/~melanson/codecs/simpleaudio.html
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* http://www.geocities.com/SiliconValley/8682/aud3.txt
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* http://openquicktime.sourceforge.net/plugins.htm
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* XAnim sources (xa_codec.c) http://www.rasnaimaging.com/people/lapus/download.html
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@ -293,14 +295,10 @@ static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble)
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sign = nibble & 8;
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delta = nibble & 7;
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#if 0
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diff = step >> 3;
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if (delta & 4) diff += step;
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if (delta & 2) diff += step >> 1;
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if (delta & 1) diff += step >> 2;
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#else
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diff = ((2 * delta + 1) * step) >> 3; // no jumps
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#endif
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/* perform direct multiplication instead of series of jumps proposed by
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* the reference ADPCM implementation since modern CPUs can do the mults
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* quickly enough */
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diff = ((2 * delta + 1) * step) >> 3;
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predictor = c->predictor;
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if (sign) predictor -= diff;
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else predictor += diff;
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@ -355,6 +353,21 @@ static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
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return (short)predictor;
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}
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/* DK3 ADPCM support macro */
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#define DK3_GET_NEXT_NIBBLE() \
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if (decode_top_nibble_next) \
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{ \
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nibble = (last_byte >> 4) & 0x0F; \
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decode_top_nibble_next = 0; \
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} \
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else \
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{ \
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last_byte = *src++; \
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if (src >= buf + buf_size) break; \
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nibble = last_byte & 0x0F; \
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decode_top_nibble_next = 1; \
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}
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static int adpcm_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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uint8_t *buf, int buf_size)
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@ -367,6 +380,12 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
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uint8_t *src;
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int st; /* stereo */
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/* DK3 ADPCM accounting variables */
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unsigned char last_byte = 0;
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unsigned char nibble;
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int decode_top_nibble_next = 0;
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int diff_channel;
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samples = data;
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src = buf;
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@ -551,6 +570,94 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
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src ++;
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}
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break;
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case CODEC_ID_ADPCM_IMA_DK4:
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if (buf_size > BLKSIZE) {
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if (avctx->block_align != 0)
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buf_size = avctx->block_align;
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else
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buf_size = BLKSIZE;
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}
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c->status[0].predictor = (src[0] | (src[1] << 8));
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c->status[0].step_index = src[2];
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src += 4;
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if(c->status[0].predictor & 0x8000)
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c->status[0].predictor -= 0x10000;
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*samples++ = c->status[0].predictor;
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if (st) {
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c->status[1].predictor = (src[0] | (src[1] << 8));
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c->status[1].step_index = src[2];
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src += 4;
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if(c->status[1].predictor & 0x8000)
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c->status[1].predictor -= 0x10000;
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*samples++ = c->status[1].predictor;
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}
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while (src < buf + buf_size) {
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/* take care of the top nibble (always left or mono channel) */
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*samples++ = adpcm_ima_expand_nibble(&c->status[0],
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(src[0] >> 4) & 0x0F);
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/* take care of the bottom nibble, which is right sample for
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* stereo, or another mono sample */
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if (st)
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*samples++ = adpcm_ima_expand_nibble(&c->status[1],
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src[0] & 0x0F);
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else
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*samples++ = adpcm_ima_expand_nibble(&c->status[0],
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src[0] & 0x0F);
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src++;
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}
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break;
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case CODEC_ID_ADPCM_IMA_DK3:
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if (buf_size > BLKSIZE) {
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if (avctx->block_align != 0)
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buf_size = avctx->block_align;
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else
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buf_size = BLKSIZE;
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}
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c->status[0].predictor = (src[10] | (src[11] << 8));
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c->status[1].predictor = (src[12] | (src[13] << 8));
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c->status[0].step_index = src[14];
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c->status[1].step_index = src[15];
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/* sign extend the predictors */
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if(c->status[0].predictor & 0x8000)
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c->status[0].predictor -= 0x10000;
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if(c->status[1].predictor & 0x8000)
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c->status[1].predictor -= 0x10000;
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src += 16;
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diff_channel = c->status[1].predictor;
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/* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
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* the buffer is consumed */
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while (1) {
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/* for this algorithm, c->status[0] is the sum channel and
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* c->status[1] is the diff channel */
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/* process the first predictor of the sum channel */
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DK3_GET_NEXT_NIBBLE();
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adpcm_ima_expand_nibble(&c->status[0], nibble);
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/* process the diff channel predictor */
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DK3_GET_NEXT_NIBBLE();
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adpcm_ima_expand_nibble(&c->status[1], nibble);
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/* process the first pair of stereo PCM samples */
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diff_channel = (diff_channel + c->status[1].predictor) / 2;
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*samples++ = c->status[0].predictor + c->status[1].predictor;
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*samples++ = c->status[0].predictor - c->status[1].predictor;
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/* process the second predictor of the sum channel */
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DK3_GET_NEXT_NIBBLE();
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adpcm_ima_expand_nibble(&c->status[0], nibble);
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/* process the second pair of stereo PCM samples */
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diff_channel = (diff_channel + c->status[1].predictor) / 2;
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*samples++ = c->status[0].predictor + c->status[1].predictor;
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*samples++ = c->status[0].predictor - c->status[1].predictor;
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}
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break;
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default:
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*data_size = 0;
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return -1;
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@ -583,8 +690,9 @@ AVCodec name ## _decoder = { \
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ADPCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
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ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
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ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
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ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
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ADPCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
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ADPCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
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#undef ADPCM_CODEC
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@ -123,6 +123,7 @@ void avcodec_register_all(void)
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register_avcodec(&mdec_decoder);
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register_avcodec(&roq_decoder);
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register_avcodec(&interplay_video_decoder);
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register_avcodec(&xan_wc3_decoder);
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#ifdef CONFIG_AC3
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register_avcodec(&ac3_decoder);
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#endif
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@ -130,6 +131,7 @@ void avcodec_register_all(void)
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register_avcodec(&ra_288_decoder);
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register_avcodec(&roq_dpcm_decoder);
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register_avcodec(&interplay_dpcm_decoder);
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register_avcodec(&xan_dpcm_decoder);
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#endif /* CONFIG_DECODERS */
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#ifdef AMR_NB
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@ -154,6 +156,8 @@ PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
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/* adpcm codecs */
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PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
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PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
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PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
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@ -68,6 +68,8 @@ enum CodecID {
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CODEC_ID_MDEC,
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CODEC_ID_ROQ,
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CODEC_ID_INTERPLAY_VIDEO,
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CODEC_ID_XAN_WC3,
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CODEC_ID_XAN_WC4,
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/* various pcm "codecs" */
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CODEC_ID_PCM_S16LE,
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@ -82,6 +84,8 @@ enum CodecID {
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/* various adpcm codecs */
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CODEC_ID_ADPCM_IMA_QT,
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CODEC_ID_ADPCM_IMA_WAV,
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CODEC_ID_ADPCM_IMA_DK3,
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CODEC_ID_ADPCM_IMA_DK4,
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CODEC_ID_ADPCM_MS,
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CODEC_ID_ADPCM_4XM,
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@ -94,6 +98,7 @@ enum CodecID {
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/* various DPCM codecs */
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CODEC_ID_ROQ_DPCM,
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CODEC_ID_INTERPLAY_DPCM,
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CODEC_ID_XAN_DPCM,
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};
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#define CODEC_ID_MPEGVIDEO CODEC_ID_MPEG1VIDEO
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@ -1356,10 +1361,12 @@ extern AVCodec fourxm_decoder;
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extern AVCodec mdec_decoder;
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extern AVCodec roq_decoder;
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extern AVCodec interplay_video_decoder;
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extern AVCodec xan_wc3_decoder;
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extern AVCodec ra_144_decoder;
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extern AVCodec ra_288_decoder;
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extern AVCodec roq_dpcm_decoder;
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extern AVCodec interplay_dpcm_decoder;
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extern AVCodec xan_dpcm_decoder;
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/* pcm codecs */
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#define PCM_CODEC(id, name) \
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@ -1379,6 +1386,8 @@ PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
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PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
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PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
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PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
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@ -21,8 +21,17 @@
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* @file: dpcm.c
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* Assorted DPCM (differential pulse code modulation) audio codecs
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* by Mike Melanson (melanson@pcisys.net)
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* Xan DPCM decoder by Mario Brito (mbrito@student.dei.uc.pt)
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* for more information on the specific data formats, visit:
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* http://www.pcisys.net/~melanson/codecs/simpleaudio.html
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*
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* Note about using the Xan DPCM decoder: Xan DPCM is used in AVI files
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* found in the Wing Commander IV computer game. These AVI files contain
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* WAVEFORMAT headers which report the audio format as 0x01: raw PCM.
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* Clearly incorrect. To detect Xan DPCM, you will probably have to
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* special-case your AVI demuxer to use Xan DPCM if the file uses 'Xxan'
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* (Xan video) for its video codec. Alternately, such AVI files also contain
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* the fourcc 'Axan' in the 'auds' chunk of the AVI header.
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*/
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#include "avcodec.h"
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@ -115,6 +124,9 @@ static int dpcm_decode_frame(AVCodecContext *avctx,
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int channel_number = 0;
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short *output_samples = data;
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int sequence_number;
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int shift[2];
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unsigned char byte;
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short diff;
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switch(avctx->codec->id) {
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@ -171,6 +183,40 @@ static int dpcm_decode_frame(AVCodecContext *avctx,
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s->last_delta[i] = predictor[i];
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break;
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case CODEC_ID_XAN_DPCM:
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in = 0;
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shift[0] = shift[1] = 4;
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predictor[0] = LE_16(&buf[in]);
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in += 2;
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SE_16BIT(predictor[0]);
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if (s->channels == 2) {
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predictor[1] = LE_16(&buf[in]);
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in += 2;
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SE_16BIT(predictor[1]);
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}
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while (in < buf_size) {
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byte = buf[in++];
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diff = (byte & 0xFC) << 8;
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if ((byte & 0x03) == 3)
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shift[channel_number]++;
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else
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shift[channel_number] -= (2 * (byte & 3));
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/* saturate the shifter to a lower limit of 0 */
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if (shift[channel_number] < 0)
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shift[channel_number] = 0;
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diff >>= shift[channel_number];
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predictor[channel_number] += diff;
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SATURATE_S16(predictor[channel_number]);
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output_samples[out++] = predictor[channel_number];
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/* toggle channel */
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channel_number ^= s->channels - 1;
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}
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break;
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}
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*data_size = out * sizeof(short);
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@ -198,3 +244,14 @@ AVCodec interplay_dpcm_decoder = {
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NULL,
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dpcm_decode_frame,
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};
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AVCodec xan_dpcm_decoder = {
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"xan_dpcm",
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CODEC_TYPE_AUDIO,
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CODEC_ID_XAN_DPCM,
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sizeof(DPCMContext),
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dpcm_decode_init,
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NULL,
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NULL,
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dpcm_decode_frame,
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};
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605
libavcodec/xan.c
Normal file
605
libavcodec/xan.c
Normal file
@ -0,0 +1,605 @@
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/*
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* Wing Commander/Xan Video Decoder
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* Copyright (C) 2003 the ffmpeg project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/**
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* @file xan.c
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* Xan video decoder for Wing Commander III & IV computer games
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* by Mario Brito (mbrito@student.dei.uc.pt)
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* and Mike Melanson (melanson@pcisys.net)
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* For more information about the Xan format, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#define PALETTE_COUNT 256
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#define PALETTE_CONTROL_SIZE ((256 * 3) + 1)
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typedef struct XanContext {
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AVCodecContext *avctx;
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DSPContext dsp;
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AVFrame last_frame;
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AVFrame current_frame;
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unsigned char *buf;
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int size;
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unsigned char palette[PALETTE_COUNT * 4];
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/* scratch space */
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unsigned char *buffer1;
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unsigned char *buffer2;
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} XanContext;
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#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
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#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
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#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
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(((uint8_t*)(x))[2] << 16) | \
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(((uint8_t*)(x))[1] << 8) | \
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((uint8_t*)(x))[0])
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/* RGB -> YUV conversion stuff */
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#define SCALEFACTOR 65536
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#define CENTERSAMPLE 128
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#define COMPUTE_Y(r, g, b) \
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||||
(unsigned char) \
|
||||
((y_r_table[r] + y_g_table[g] + y_b_table[b]) / SCALEFACTOR)
|
||||
#define COMPUTE_U(r, g, b) \
|
||||
(unsigned char) \
|
||||
((u_r_table[r] + u_g_table[g] + u_b_table[b]) / SCALEFACTOR + CENTERSAMPLE)
|
||||
#define COMPUTE_V(r, g, b) \
|
||||
(unsigned char) \
|
||||
((v_r_table[r] + v_g_table[g] + v_b_table[b]) / SCALEFACTOR + CENTERSAMPLE)
|
||||
|
||||
#define Y_R (SCALEFACTOR * 0.29900)
|
||||
#define Y_G (SCALEFACTOR * 0.58700)
|
||||
#define Y_B (SCALEFACTOR * 0.11400)
|
||||
|
||||
#define U_R (SCALEFACTOR * -0.16874)
|
||||
#define U_G (SCALEFACTOR * -0.33126)
|
||||
#define U_B (SCALEFACTOR * 0.50000)
|
||||
|
||||
#define V_R (SCALEFACTOR * 0.50000)
|
||||
#define V_G (SCALEFACTOR * -0.41869)
|
||||
#define V_B (SCALEFACTOR * -0.08131)
|
||||
|
||||
/*
|
||||
* Precalculate all of the YUV tables since it requires fewer than
|
||||
* 10 kilobytes to store them.
|
||||
*/
|
||||
static int y_r_table[256];
|
||||
static int y_g_table[256];
|
||||
static int y_b_table[256];
|
||||
|
||||
static int u_r_table[256];
|
||||
static int u_g_table[256];
|
||||
static int u_b_table[256];
|
||||
|
||||
static int v_r_table[256];
|
||||
static int v_g_table[256];
|
||||
static int v_b_table[256];
|
||||
|
||||
static int xan_decode_init(AVCodecContext *avctx)
|
||||
{
|
||||
XanContext *s = avctx->priv_data;
|
||||
int i;
|
||||
|
||||
s->avctx = avctx;
|
||||
|
||||
if ((avctx->codec->id == CODEC_ID_XAN_WC3) &&
|
||||
(s->avctx->extradata_size != PALETTE_CONTROL_SIZE)) {
|
||||
printf (" WC3 Xan video: expected extradata_size of %d\n",
|
||||
PALETTE_CONTROL_SIZE);
|
||||
return -1;
|
||||
}
|
||||
|
||||
avctx->pix_fmt = PIX_FMT_YUV444P;
|
||||
avctx->has_b_frames = 0;
|
||||
dsputil_init(&s->dsp, avctx);
|
||||
|
||||
/* initialize the RGB -> YUV tables */
|
||||
for (i = 0; i < 256; i++) {
|
||||
y_r_table[i] = Y_R * i;
|
||||
y_g_table[i] = Y_G * i;
|
||||
y_b_table[i] = Y_B * i;
|
||||
|
||||
u_r_table[i] = U_R * i;
|
||||
u_g_table[i] = U_G * i;
|
||||
u_b_table[i] = U_B * i;
|
||||
|
||||
v_r_table[i] = V_R * i;
|
||||
v_g_table[i] = V_G * i;
|
||||
v_b_table[i] = V_B * i;
|
||||
}
|
||||
|
||||
s->buffer1 = av_malloc(avctx->width * avctx->height * 4);
|
||||
s->buffer2 = av_malloc(avctx->width * avctx->height * 4);
|
||||
if (!s->buffer1 || !s->buffer2)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* This function is used in lieu of memcpy(). This decoder can not use
|
||||
* memcpy because the memory locations often overlap and
|
||||
* memcpy doesn't like that; it's not uncommon, for example, for
|
||||
* dest = src+1, to turn byte A into pattern AAAAAAAA.
|
||||
* This was originally repz movsb in Intel x86 ASM. */
|
||||
static inline void bytecopy(unsigned char *dest, unsigned char *src, int count)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < count; i++)
|
||||
dest[i] = src[i];
|
||||
}
|
||||
|
||||
static int xan_decode_method_1(unsigned char *dest, unsigned char *src)
|
||||
{
|
||||
unsigned char byte = *src++;
|
||||
unsigned char ival = byte + 0x16;
|
||||
unsigned char * ptr = src + byte*2;
|
||||
unsigned char val = ival;
|
||||
int counter = 0;
|
||||
|
||||
unsigned char bits = *ptr++;
|
||||
|
||||
while ( val != 0x16 ) {
|
||||
if ( (1 << counter) & bits )
|
||||
val = src[byte + val - 0x17];
|
||||
else
|
||||
val = src[val - 0x17];
|
||||
|
||||
if ( val < 0x16 ) {
|
||||
*dest++ = val;
|
||||
val = ival;
|
||||
}
|
||||
|
||||
if (counter++ == 7) {
|
||||
counter = 0;
|
||||
bits = *ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int xan_decode_method_2(unsigned char *dest, unsigned char *src)
|
||||
{
|
||||
unsigned char opcode;
|
||||
int size;
|
||||
int offset;
|
||||
int byte1, byte2, byte3;
|
||||
|
||||
for (;;) {
|
||||
opcode = *src++;
|
||||
|
||||
if ( (opcode & 0x80) == 0 ) {
|
||||
|
||||
offset = *src++;
|
||||
|
||||
size = opcode & 3;
|
||||
bytecopy(dest, src, size); dest += size; src += size;
|
||||
|
||||
size = ((opcode & 0x1c) >> 2) + 3;
|
||||
bytecopy (dest, dest - (((opcode & 0x60) << 3) + offset + 1), size);
|
||||
dest += size;
|
||||
|
||||
} else if ( (opcode & 0x40) == 0 ) {
|
||||
|
||||
byte1 = *src++;
|
||||
byte2 = *src++;
|
||||
|
||||
size = byte1 >> 6;
|
||||
bytecopy (dest, src, size); dest += size; src += size;
|
||||
|
||||
size = (opcode & 0x3f) + 4;
|
||||
bytecopy (dest, dest - (((byte1 & 0x3f) << 8) + byte2 + 1), size);
|
||||
dest += size;
|
||||
|
||||
} else if ( (opcode & 0x20) == 0 ) {
|
||||
|
||||
byte1 = *src++;
|
||||
byte2 = *src++;
|
||||
byte3 = *src++;
|
||||
|
||||
size = opcode & 3;
|
||||
bytecopy (dest, src, size); dest += size; src += size;
|
||||
|
||||
size = byte3 + 5 + ((opcode & 0xc) << 6);
|
||||
bytecopy (dest,
|
||||
dest - ((((opcode & 0x10) >> 4) << 0x10) + 1 + (byte1 << 8) + byte2),
|
||||
size);
|
||||
dest += size;
|
||||
} else {
|
||||
size = ((opcode & 0x1f) << 2) + 4;
|
||||
|
||||
if (size > 0x70)
|
||||
break;
|
||||
|
||||
bytecopy (dest, src, size); dest += size; src += size;
|
||||
}
|
||||
}
|
||||
|
||||
size = opcode & 3;
|
||||
bytecopy(dest, src, size); dest += size; src += size;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void inline xan_wc3_build_palette(XanContext *s,
|
||||
unsigned char *palette_data)
|
||||
{
|
||||
int i;
|
||||
unsigned char r, g, b;
|
||||
|
||||
/* transform the palette passed through the palette control structure
|
||||
* into the necessary internal format depending on colorspace */
|
||||
|
||||
switch (s->avctx->pix_fmt) {
|
||||
|
||||
case PIX_FMT_YUV444P:
|
||||
for (i = 0; i < PALETTE_COUNT; i++) {
|
||||
r = *palette_data++;
|
||||
g = *palette_data++;
|
||||
b = *palette_data++;
|
||||
s->palette[i * 4 + 0] = COMPUTE_Y(r, g, b);
|
||||
s->palette[i * 4 + 1] = COMPUTE_U(r, g, b);
|
||||
s->palette[i * 4 + 2] = COMPUTE_V(r, g, b);
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
printf (" Xan WC3: Unhandled colorspace\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void inline xan_wc3_output_pixel_run(XanContext *s,
|
||||
unsigned char *pixel_buffer, int x, int y, int pixel_count)
|
||||
{
|
||||
int stride;
|
||||
int line_inc;
|
||||
int index;
|
||||
int current_x;
|
||||
int width = s->avctx->width;
|
||||
unsigned char pixel;
|
||||
unsigned char *y_plane;
|
||||
unsigned char *u_plane;
|
||||
unsigned char *v_plane;
|
||||
|
||||
switch (s->avctx->pix_fmt) {
|
||||
|
||||
case PIX_FMT_YUV444P:
|
||||
y_plane = s->current_frame.data[0];
|
||||
u_plane = s->current_frame.data[1];
|
||||
v_plane = s->current_frame.data[2];
|
||||
stride = s->current_frame.linesize[0];
|
||||
line_inc = stride - width;
|
||||
index = y * stride + x;
|
||||
current_x = x;
|
||||
while(pixel_count--) {
|
||||
pixel = *pixel_buffer++;
|
||||
|
||||
y_plane[index] = s->palette[pixel * 4 + 0];
|
||||
u_plane[index] = s->palette[pixel * 4 + 1];
|
||||
v_plane[index] = s->palette[pixel * 4 + 2];
|
||||
|
||||
index++;
|
||||
current_x++;
|
||||
if (current_x >= width) {
|
||||
/* reset accounting variables */
|
||||
index += line_inc;
|
||||
current_x = 0;
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
printf (" Xan WC3: Unhandled colorspace\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void inline xan_wc3_copy_pixel_run(XanContext *s,
|
||||
int x, int y, int pixel_count, int motion_x, int motion_y)
|
||||
{
|
||||
int stride;
|
||||
int line_inc;
|
||||
int curframe_index, prevframe_index;
|
||||
int curframe_x, prevframe_x;
|
||||
int width = s->avctx->width;
|
||||
unsigned char *y_plane, *u_plane, *v_plane;
|
||||
unsigned char *prev_y_plane, *prev_u_plane, *prev_v_plane;
|
||||
|
||||
switch (s->avctx->pix_fmt) {
|
||||
|
||||
case PIX_FMT_YUV444P:
|
||||
y_plane = s->current_frame.data[0];
|
||||
u_plane = s->current_frame.data[1];
|
||||
v_plane = s->current_frame.data[2];
|
||||
prev_y_plane = s->last_frame.data[0];
|
||||
prev_u_plane = s->last_frame.data[1];
|
||||
prev_v_plane = s->last_frame.data[2];
|
||||
stride = s->current_frame.linesize[0];
|
||||
line_inc = stride - width;
|
||||
curframe_index = y * stride + x;
|
||||
curframe_x = x;
|
||||
prevframe_index = (y + motion_x) * stride + x + motion_x;
|
||||
prevframe_x = x + motion_x;
|
||||
while(pixel_count--) {
|
||||
|
||||
y_plane[curframe_index] = prev_y_plane[prevframe_index];
|
||||
u_plane[curframe_index] = prev_u_plane[prevframe_index];
|
||||
v_plane[curframe_index] = prev_v_plane[prevframe_index];
|
||||
|
||||
curframe_index++;
|
||||
curframe_x++;
|
||||
if (curframe_x >= width) {
|
||||
/* reset accounting variables */
|
||||
curframe_index += line_inc;
|
||||
curframe_x = 0;
|
||||
}
|
||||
|
||||
prevframe_index++;
|
||||
prevframe_x++;
|
||||
if (prevframe_x >= width) {
|
||||
/* reset accounting variables */
|
||||
prevframe_index += line_inc;
|
||||
prevframe_x = 0;
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
printf (" Xan WC3: Unhandled colorspace\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void xan_wc3_decode_frame(XanContext *s) {
|
||||
|
||||
int width = s->avctx->width;
|
||||
int height = s->avctx->height;
|
||||
int total_pixels = width * height;
|
||||
unsigned char opcode;
|
||||
unsigned char flag = 0;
|
||||
int size = 0;
|
||||
int motion_x, motion_y;
|
||||
int x, y;
|
||||
|
||||
unsigned char *method1_buffer = s->buffer1;
|
||||
unsigned char *method2_buffer = s->buffer2;
|
||||
|
||||
/* pointers to segments inside the compressed chunk */
|
||||
unsigned char *method1_segment;
|
||||
unsigned char *size_segment;
|
||||
unsigned char *vector_segment;
|
||||
unsigned char *method2_segment;
|
||||
|
||||
method1_segment = s->buf + LE_16(&s->buf[0]);
|
||||
size_segment = s->buf + LE_16(&s->buf[2]);
|
||||
vector_segment = s->buf + LE_16(&s->buf[4]);
|
||||
method2_segment = s->buf + LE_16(&s->buf[6]);
|
||||
|
||||
xan_decode_method_1(method1_buffer, method1_segment);
|
||||
if (method2_segment[0] == 2)
|
||||
xan_decode_method_2(method2_buffer, method2_segment + 1);
|
||||
else
|
||||
method2_buffer = method2_segment + 1;
|
||||
|
||||
/* use the decoded data segments to build the frame */
|
||||
x = y = 0;
|
||||
while (total_pixels) {
|
||||
|
||||
opcode = *method1_buffer++;
|
||||
size = 0;
|
||||
|
||||
switch (opcode) {
|
||||
|
||||
case 0:
|
||||
flag ^= 1;
|
||||
continue;
|
||||
|
||||
case 1:
|
||||
case 2:
|
||||
case 3:
|
||||
case 4:
|
||||
case 5:
|
||||
case 6:
|
||||
case 7:
|
||||
case 8:
|
||||
size = opcode;
|
||||
break;
|
||||
|
||||
case 12:
|
||||
case 13:
|
||||
case 14:
|
||||
case 15:
|
||||
case 16:
|
||||
case 17:
|
||||
case 18:
|
||||
size += (opcode - 10);
|
||||
break;
|
||||
|
||||
case 9:
|
||||
case 19:
|
||||
size = *size_segment++;
|
||||
break;
|
||||
|
||||
case 10:
|
||||
case 20:
|
||||
size = BE_16(&size_segment[0]);
|
||||
size_segment += 2;
|
||||
break;
|
||||
|
||||
case 11:
|
||||
case 21:
|
||||
size = (size_segment[0] << 16) | (size_segment[1] << 8) |
|
||||
size_segment[2];
|
||||
size_segment += 3;
|
||||
break;
|
||||
}
|
||||
|
||||
if (opcode < 12) {
|
||||
flag ^= 1;
|
||||
if (flag) {
|
||||
/* run of (size) pixels is unchanged from last frame */
|
||||
xan_wc3_copy_pixel_run(s, x, y, size, 0, 0);
|
||||
} else {
|
||||
/* output a run of pixels from method2_buffer */
|
||||
xan_wc3_output_pixel_run(s, method2_buffer, x, y, size);
|
||||
method2_buffer += size;
|
||||
}
|
||||
} else {
|
||||
/* run-based motion compensation from last frame */
|
||||
motion_x = (*vector_segment >> 4) & 0xF;
|
||||
motion_y = *vector_segment & 0xF;
|
||||
vector_segment++;
|
||||
|
||||
/* sign extension */
|
||||
if (motion_x & 0x8)
|
||||
motion_x |= 0xFFFFFFF0;
|
||||
if (motion_y & 0x8)
|
||||
motion_y |= 0xFFFFFFF0;
|
||||
|
||||
/* copy a run of pixels from the previous frame */
|
||||
xan_wc3_copy_pixel_run(s, x, y, size, motion_x, motion_y);
|
||||
|
||||
flag = 0;
|
||||
}
|
||||
|
||||
/* coordinate accounting */
|
||||
total_pixels -= size;
|
||||
while (size) {
|
||||
if (x + size >= width) {
|
||||
y++;
|
||||
size -= (width - x);
|
||||
x = 0;
|
||||
} else {
|
||||
x += size;
|
||||
size = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void xan_wc4_decode_frame(XanContext *s) {
|
||||
}
|
||||
|
||||
static int xan_decode_frame(AVCodecContext *avctx,
|
||||
void *data, int *data_size,
|
||||
uint8_t *buf, int buf_size)
|
||||
{
|
||||
XanContext *s = avctx->priv_data;
|
||||
unsigned char *palette_control = avctx->extradata;
|
||||
int keyframe = 0;
|
||||
|
||||
if (palette_control[0]) {
|
||||
/* load the new palette and reset the palette control */
|
||||
xan_wc3_build_palette(s, &palette_control[1]);
|
||||
palette_control[0] = 0;
|
||||
keyframe = 1;
|
||||
}
|
||||
|
||||
if (avctx->get_buffer(avctx, &s->current_frame)) {
|
||||
printf (" Interplay Video: get_buffer() failed\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
s->buf = buf;
|
||||
s->size = buf_size;
|
||||
|
||||
if (avctx->codec->id == CODEC_ID_XAN_WC3) {
|
||||
// if (keyframe)
|
||||
if (1)
|
||||
xan_wc3_decode_frame(s);
|
||||
else {
|
||||
memcpy(s->current_frame.data[0], s->last_frame.data[0],
|
||||
s->current_frame.linesize[0] * avctx->height);
|
||||
memcpy(s->current_frame.data[1], s->last_frame.data[1],
|
||||
s->current_frame.linesize[1] * avctx->height);
|
||||
memcpy(s->current_frame.data[2], s->last_frame.data[2],
|
||||
s->current_frame.linesize[2] * avctx->height);
|
||||
}
|
||||
} else if (avctx->codec->id == CODEC_ID_XAN_WC4)
|
||||
xan_wc4_decode_frame(s);
|
||||
|
||||
/* release the last frame if it is allocated */
|
||||
if (s->last_frame.data[0])
|
||||
avctx->release_buffer(avctx, &s->last_frame);
|
||||
|
||||
/* shuffle frames */
|
||||
s->last_frame = s->current_frame;
|
||||
|
||||
*data_size = sizeof(AVFrame);
|
||||
*(AVFrame*)data = s->current_frame;
|
||||
|
||||
/* always report that the buffer was completely consumed */
|
||||
return buf_size;
|
||||
}
|
||||
|
||||
static int xan_decode_end(AVCodecContext *avctx)
|
||||
{
|
||||
XanContext *s = avctx->priv_data;
|
||||
|
||||
/* release the last frame */
|
||||
avctx->release_buffer(avctx, &s->last_frame);
|
||||
|
||||
av_free(s->buffer1);
|
||||
av_free(s->buffer2);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVCodec xan_wc3_decoder = {
|
||||
"xan_wc3",
|
||||
CODEC_TYPE_VIDEO,
|
||||
CODEC_ID_XAN_WC3,
|
||||
sizeof(XanContext),
|
||||
xan_decode_init,
|
||||
NULL,
|
||||
xan_decode_end,
|
||||
xan_decode_frame,
|
||||
CODEC_CAP_DR1,
|
||||
};
|
||||
|
||||
/*
|
||||
AVCodec xan_wc4_decoder = {
|
||||
"xan_wc4",
|
||||
CODEC_TYPE_VIDEO,
|
||||
CODEC_ID_XAN_WC4,
|
||||
sizeof(XanContext),
|
||||
xan_decode_init,
|
||||
NULL,
|
||||
xan_decode_end,
|
||||
xan_decode_frame,
|
||||
CODEC_CAP_DR1,
|
||||
};
|
||||
*/
|
||||
Loading…
x
Reference in New Issue
Block a user