From ee769c6a7c1d4ec6560f5e5a6f457b770b10fb33 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alberto=20Delm=C3=A1s?= Date: Fri, 24 Aug 2012 17:45:57 +0200 Subject: MSS2 decoder Signed-off-by: Kostya Shishkov --- Changelog | 1 + configure | 1 + doc/general.texi | 2 + libavcodec/Makefile | 1 + libavcodec/allcodecs.c | 1 + libavcodec/avcodec.h | 1 + libavcodec/codec_desc.c | 7 + libavcodec/h263dec.c | 6 +- libavcodec/mpegvideo.c | 13 +- libavcodec/mss1.c | 106 +++--- libavcodec/mss12.c | 386 ++++++++++++++-------- libavcodec/mss12.h | 70 +++- libavcodec/mss2.c | 860 ++++++++++++++++++++++++++++++++++++++++++++++++ libavcodec/mss2dsp.c | 153 +++++++++ libavcodec/mss2dsp.h | 50 +++ libavcodec/vc1.c | 7 +- libavcodec/vc1.h | 2 + libavcodec/vc1dec.c | 10 +- libavcodec/version.h | 4 +- libavformat/riff.c | 1 + 20 files changed, 1466 insertions(+), 216 deletions(-) create mode 100644 libavcodec/mss2.c create mode 100644 libavcodec/mss2dsp.c create mode 100644 libavcodec/mss2dsp.h diff --git a/Changelog b/Changelog index 4fcce0e..fd67add 100644 --- a/Changelog +++ b/Changelog @@ -45,6 +45,7 @@ version : - avconv -shortest option is now per-output file, -pass and -passlogfile are now per-output stream - Ut Video encoder +- Microsoft Screen 2 decoder version 0.8: diff --git a/configure b/configure index b12df4e..ff051f5 100755 --- a/configure +++ b/configure @@ -1479,6 +1479,7 @@ msmpeg4v2_decoder_select="h263_decoder" msmpeg4v2_encoder_select="h263_encoder" msmpeg4v3_decoder_select="h263_decoder" msmpeg4v3_encoder_select="h263_encoder" +mss2_decoder_select="vc1_decoder" nellymoser_decoder_select="mdct sinewin" nellymoser_encoder_select="mdct sinewin" png_decoder_select="zlib" diff --git a/doc/general.texi b/doc/general.texi index 7f22847..8415ca3 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -547,6 +547,8 @@ following image formats are supported: @item Microsoft RLE @tab @tab X @item Microsoft Screen 1 @tab @tab X @tab Also known as Windows Media Video V7 Screen. +@item Microsoft Screen 2 @tab @tab X + @tab Also known as Windows Media Video V9 Screen. @item Microsoft Video 1 @tab @tab X @item Mimic @tab @tab X @tab Used in MSN Messenger Webcam streams. diff --git a/libavcodec/Makefile b/libavcodec/Makefile index adbe1a3..7b3dc22 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -271,6 +271,7 @@ OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4.o msmpeg4enc.o msmpeg4data.o \ OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o msrledec.o OBJS-$(CONFIG_MSA1_DECODER) += mss3.o mss34dsp.o OBJS-$(CONFIG_MSS1_DECODER) += mss1.o mss12.o +OBJS-$(CONFIG_MSS2_DECODER) += mss2.o mss12.o mss2dsp.o OBJS-$(CONFIG_MSVIDEO1_DECODER) += msvideo1.o OBJS-$(CONFIG_MSZH_DECODER) += lcldec.o OBJS-$(CONFIG_MTS2_DECODER) += mss4.o mss34dsp.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index f7187d1..c6df818 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -160,6 +160,7 @@ void avcodec_register_all(void) REGISTER_ENCDEC (MSMPEG4V3, msmpeg4v3); REGISTER_DECODER (MSRLE, msrle); REGISTER_DECODER (MSS1, mss1); + REGISTER_DECODER (MSS2, mss2); REGISTER_DECODER (MSVIDEO1, msvideo1); REGISTER_DECODER (MSZH, mszh); REGISTER_DECODER (MTS2, mts2); diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 742a2a3..8a091bd 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -264,6 +264,7 @@ enum AVCodecID { AV_CODEC_ID_TSCC2, AV_CODEC_ID_MTS2, AV_CODEC_ID_CLLC, + AV_CODEC_ID_MSS2, /* various PCM "codecs" */ AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c index 513a15c..51fc171 100644 --- a/libavcodec/codec_desc.c +++ b/libavcodec/codec_desc.c @@ -1200,6 +1200,13 @@ static const AVCodecDescriptor codec_descriptors[] = { .long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"), .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS, }, + { + .id = AV_CODEC_ID_MSS2, + .type = AVMEDIA_TYPE_VIDEO, + .name = "mss2", + .long_name = NULL_IF_CONFIG_SMALL("MS Windows Media Video V9 Screen"), + .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY, + }, /* various PCM "codecs" */ { diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index 6bb6204..8e6085b 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -58,7 +58,10 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx) s->quant_precision=5; s->decode_mb= ff_h263_decode_mb; s->low_delay= 1; - avctx->pix_fmt= avctx->get_format(avctx, avctx->codec->pix_fmts); + if (avctx->codec->id == AV_CODEC_ID_MSS2) + avctx->pix_fmt = PIX_FMT_YUV420P; + else + avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts); s->unrestricted_mv= 1; /* select sub codec */ @@ -93,6 +96,7 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx) case AV_CODEC_ID_WMV3: case AV_CODEC_ID_VC1IMAGE: case AV_CODEC_ID_WMV3IMAGE: + case AV_CODEC_ID_MSS2: s->h263_pred = 1; s->msmpeg4_version=6; avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index 13e2acc..e9aff3b 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -226,10 +226,11 @@ void ff_copy_picture(Picture *dst, Picture *src) */ static void free_frame_buffer(MpegEncContext *s, Picture *pic) { - /* Windows Media Image codecs allocate internal buffers with different - * dimensions; ignore user defined callbacks for these - */ - if (s->codec_id != AV_CODEC_ID_WMV3IMAGE && s->codec_id != AV_CODEC_ID_VC1IMAGE) + /* WM Image / Screen codecs allocate internal buffers with different + * dimensions / colorspaces; ignore user-defined callbacks for these. */ + if (s->codec_id != AV_CODEC_ID_WMV3IMAGE && + s->codec_id != AV_CODEC_ID_VC1IMAGE && + s->codec_id != AV_CODEC_ID_MSS2) ff_thread_release_buffer(s->avctx, &pic->f); else avcodec_default_release_buffer(s->avctx, &pic->f); @@ -254,7 +255,9 @@ static int alloc_frame_buffer(MpegEncContext *s, Picture *pic) } } - if (s->codec_id != AV_CODEC_ID_WMV3IMAGE && s->codec_id != AV_CODEC_ID_VC1IMAGE) + if (s->codec_id != AV_CODEC_ID_WMV3IMAGE && + s->codec_id != AV_CODEC_ID_VC1IMAGE && + s->codec_id != AV_CODEC_ID_MSS2) r = ff_thread_get_buffer(s->avctx, &pic->f); else r = avcodec_default_get_buffer(s->avctx, &pic->f); diff --git a/libavcodec/mss1.c b/libavcodec/mss1.c index fe8ee10..ada479e 100644 --- a/libavcodec/mss1.c +++ b/libavcodec/mss1.c @@ -24,14 +24,13 @@ * Microsoft Screen 1 (aka Windows Media Video V7 Screen) decoder */ -#include "libavutil/intfloat.h" -#include "libavutil/intreadwrite.h" #include "avcodec.h" #include "mss12.h" typedef struct MSS1Context { MSS12Context ctx; AVFrame pic; + SliceContext sc[2]; } MSS1Context; static void arith_normalise(ArithCoder *c) @@ -56,24 +55,11 @@ static void arith_normalise(ArithCoder *c) c->low <<= 1; c->high <<= 1; c->high |= 1; - c->value |= get_bits1(c->gb); + c->value |= get_bits1(c->gbc.gb); } } -static int arith_get_bit(ArithCoder *c) -{ - int range = c->high - c->low + 1; - int bit = (((c->value - c->low) << 1) + 1) / range; - - if (bit) - c->low += range >> 1; - else - c->high = c->low + (range >> 1) - 1; - - arith_normalise(c); - - return bit; -} +ARITH_GET_BIT() static int arith_get_bits(ArithCoder *c, int bits) { @@ -118,40 +104,27 @@ static int arith_get_prob(ArithCoder *c, int *probs) return sym; } -static int arith_get_model_sym(ArithCoder *c, Model *m) -{ - int idx, val; - - idx = arith_get_prob(c, m->cum_prob); - - val = m->idx2sym[idx]; - ff_mss12_model_update(m, idx); - - arith_normalise(c); - - return val; -} +ARITH_GET_MODEL_SYM() static void arith_init(ArithCoder *c, GetBitContext *gb) { - c->low = 0; - c->high = 0xFFFF; - c->value = get_bits(gb, 16); - c->gb = gb; - + c->low = 0; + c->high = 0xFFFF; + c->value = get_bits(gb, 16); + c->gbc.gb = gb; c->get_model_sym = arith_get_model_sym; c->get_number = arith_get_number; } -static int decode_pal(MSS1Context *ctx, ArithCoder *acoder) +static int decode_pal(MSS12Context *ctx, ArithCoder *acoder) { int i, ncol, r, g, b; - uint32_t *pal = ctx->ctx.pal + 256 - ctx->ctx.free_colours; + uint32_t *pal = ctx->pal + 256 - ctx->free_colours; - if (!ctx->ctx.free_colours) + if (!ctx->free_colours) return 0; - ncol = arith_get_number(acoder, ctx->ctx.free_colours + 1); + ncol = arith_get_number(acoder, ctx->free_colours + 1); for (i = 0; i < ncol; i++) { r = arith_get_bits(acoder, 8); g = arith_get_bits(acoder, 8); @@ -167,7 +140,8 @@ static int mss1_decode_frame(AVCodecContext *avctx, void *data, int *data_size, { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; - MSS1Context *c = avctx->priv_data; + MSS1Context *ctx = avctx->priv_data; + MSS12Context *c = &ctx->ctx; GetBitContext gb; ArithCoder acoder; int pal_changed = 0; @@ -176,37 +150,37 @@ static int mss1_decode_frame(AVCodecContext *avctx, void *data, int *data_size, init_get_bits(&gb, buf, buf_size * 8); arith_init(&acoder, &gb); - c->pic.reference = 3; - c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | - FF_BUFFER_HINTS_REUSABLE; - if ((ret = avctx->reget_buffer(avctx, &c->pic)) < 0) { + ctx->pic.reference = 3; + ctx->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE | + FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; + if ((ret = avctx->reget_buffer(avctx, &ctx->pic)) < 0) { av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return ret; } - c->ctx.pic_start = c->pic.data[0] + c->pic.linesize[0] * (avctx->height - 1); - c->ctx.pic_stride = -c->pic.linesize[0]; - c->ctx.keyframe = !arith_get_bit(&acoder); - if (c->ctx.keyframe) { - ff_mss12_codec_reset(&c->ctx); - pal_changed = decode_pal(c, &acoder); - c->pic.key_frame = 1; - c->pic.pict_type = AV_PICTURE_TYPE_I; + c->pal_pic = ctx->pic.data[0] + ctx->pic.linesize[0] * (avctx->height - 1); + c->pal_stride = -ctx->pic.linesize[0]; + c->keyframe = !arith_get_bit(&acoder); + if (c->keyframe) { + ff_mss12_codec_reset(c); + pal_changed = decode_pal(c, &acoder); + ctx->pic.key_frame = 1; + ctx->pic.pict_type = AV_PICTURE_TYPE_I; } else { - if (c->ctx.corrupted) + if (c->corrupted) return AVERROR_INVALIDDATA; - c->pic.key_frame = 0; - c->pic.pict_type = AV_PICTURE_TYPE_P; + ctx->pic.key_frame = 0; + ctx->pic.pict_type = AV_PICTURE_TYPE_P; } - c->ctx.corrupted = ff_mss12_decode_rect(&c->ctx, &acoder, 0, 0, - avctx->width, avctx->height); - if (c->ctx.corrupted) + c->corrupted = ff_mss12_decode_rect(&c->sc[0], &acoder, 0, 0, + avctx->width, avctx->height); + if (c->corrupted) return AVERROR_INVALIDDATA; - memcpy(c->pic.data[1], c->ctx.pal, AVPALETTE_SIZE); - c->pic.palette_has_changed = pal_changed; + memcpy(ctx->pic.data[1], c->pal, AVPALETTE_SIZE); + ctx->pic.palette_has_changed = pal_changed; *data_size = sizeof(AVFrame); - *(AVFrame*)data = c->pic; + *(AVFrame*)data = ctx->pic; /* always report that the buffer was completely consumed */ return buf_size; @@ -219,16 +193,16 @@ static av_cold int mss1_decode_init(AVCodecContext *avctx) c->ctx.avctx = avctx; avctx->coded_frame = &c->pic; - return ff_mss12_decode_init(avctx, 0); + return ff_mss12_decode_init(&c->ctx, 0); } static av_cold int mss1_decode_end(AVCodecContext *avctx) { - MSS1Context * const c = avctx->priv_data; + MSS1Context * const ctx = avctx->priv_data; - if (c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); - ff_mss12_decode_end(avctx); + if (ctx->pic.data[0]) + avctx->release_buffer(avctx, &ctx->pic); + ff_mss12_decode_end(&ctx->ctx); return 0; } diff --git a/libavcodec/mss12.c b/libavcodec/mss12.c index 8b4f52b..f0f23c0 100644 --- a/libavcodec/mss12.c +++ b/libavcodec/mss12.c @@ -47,12 +47,8 @@ static int model_calc_threshold(Model *m) { int thr; - if (m->thr_weight == -1) { - thr = 2 * m->weights[m->num_syms] - 1; - thr = ((thr >> 1) + 4 * m->cum_prob[0]) / thr; - } else { - thr = m->num_syms * m->thr_weight; - } + thr = 2 * m->weights[m->num_syms] - 1; + thr = ((thr >> 1) + 4 * m->cum_prob[0]) / thr; return FFMIN(thr, 0x3FFF); } @@ -78,7 +74,7 @@ static av_cold void model_init(Model *m, int num_syms, int thr_weight) { m->num_syms = num_syms; m->thr_weight = thr_weight; - m->threshold = model_calc_threshold(m); + m->threshold = num_syms * thr_weight; model_reset(m); } @@ -87,7 +83,7 @@ static void model_rescale_weights(Model *m) int i; int cum_prob; - if (m->thr_weight == -1) + if (m->thr_weight == THRESH_ADAPTIVE) m->threshold = model_calc_threshold(m); while (m->cum_prob[0] > m->threshold) { cum_prob = 0; @@ -129,8 +125,14 @@ static void pixctx_reset(PixContext *ctx) { int i, j, k; - for (i = 0; i < ctx->cache_size; i++) - ctx->cache[i] = i; + if (!ctx->special_initial_cache) + for (i = 0; i < ctx->cache_size; i++) + ctx->cache[i] = i; + else { + ctx->cache[0] = 1; + ctx->cache[1] = 2; + ctx->cache[2] = 4; + } model_reset(&ctx->cache_model); model_reset(&ctx->full_model); @@ -141,27 +143,23 @@ static void pixctx_reset(PixContext *ctx) model_reset(&ctx->sec_models[i][j][k]); } -static av_cold void pixctx_init(PixContext *ctx, int cache_size) +static av_cold void pixctx_init(PixContext *ctx, int cache_size, + int full_model_syms, int special_initial_cache) { int i, j, k; - ctx->cache_size = cache_size + 4; - ctx->num_syms = cache_size; - - for (i = 0; i < ctx->cache_size; i++) - ctx->cache[i] = i; + ctx->cache_size = cache_size + 4; + ctx->num_syms = cache_size; + ctx->special_initial_cache = special_initial_cache; model_init(&ctx->cache_model, ctx->num_syms + 1, THRESH_LOW); - model_init(&ctx->full_model, 256, THRESH_HIGH); + model_init(&ctx->full_model, full_model_syms, THRESH_HIGH); - for (i = 0; i < 4; i++) { - for (j = 0; j < sec_order_sizes[i]; j++) { - for (k = 0; k < 4; k++) { + for (i = 0; i < 4; i++) + for (j = 0; j < sec_order_sizes[i]; j++) + for (k = 0; k < 4; k++) model_init(&ctx->sec_models[i][j][k], 2 + i, i ? THRESH_LOW : THRESH_ADAPTIVE); - } - } - } } static int decode_top_left_pixel(ArithCoder *acoder, PixContext *pctx) @@ -196,7 +194,6 @@ static int decode_pixel(ArithCoder *acoder, PixContext *pctx, if (val < pctx->num_syms) { int idx, j; - idx = 0; for (i = 0; i < pctx->cache_size; i++) { for (j = 0; j < num_ngb; j++) @@ -309,195 +306,288 @@ static int decode_pixel_in_context(ArithCoder *acoder, PixContext *pctx, break; } - pix = acoder->get_model_sym(acoder, &pctx->sec_models[nlen - 1][layer][sub]); + pix = acoder->get_model_sym(acoder, + &pctx->sec_models[nlen - 1][layer][sub]); if (pix < nlen) return ref_pix[pix]; else return decode_pixel(acoder, pctx, ref_pix, nlen); } -static int decode_region(MSS12Context *ctx, ArithCoder *acoder, uint8_t *dst, +static int decode_region(ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic, int x, int y, int width, int height, int stride, - PixContext *pctx) + int rgb_stride, PixContext *pctx, const uint32_t *pal) { - int i, j; + int i, j, p; + uint8_t *rgb_dst = rgb_pic + x * 3 + y * rgb_stride; dst += x + y * stride; - dst[0] = decode_top_left_pixel(acoder, pctx); for (j = 0; j < height; j++) { for (i = 0; i < width; i++) { if (!i && !j) - continue; + p = decode_top_left_pixel(acoder, pctx); + else + p = decode_pixel_in_context(acoder, pctx, dst + i, stride, + i, j, width - i - 1); + dst[i] = p; - dst[i] = decode_pixel_in_context(acoder, pctx, dst + i, stride, - i, j, width - i - 1); + if (rgb_pic) + AV_WB24(rgb_dst + i * 3, pal[p]); } - dst += stride; + dst += stride; + rgb_dst += rgb_stride; } return 0; } -static int decode_region_masked(MSS12Context *ctx, ArithCoder *acoder, +static void copy_rectangles(MSS12Context const *c, + int x, int y, int width, int height) +{ + int j; + + if (c->last_rgb_pic) + for (j = y; j < y + height; j++) { + memcpy(c->rgb_pic + j * c->rgb_stride + x * 3, + c->last_rgb_pic + j * c->rgb_stride + x * 3, + width * 3); + memcpy(c->pal_pic + j * c->pal_stride + x, + c->last_pal_pic + j * c->pal_stride + x, + width); + } +} + +static int motion_compensation(MSS12Context const *c, + int x, int y, int width, int height) +{ + if (x + c->mvX < 0 || x + c->mvX + width > c->avctx->width || + y + c->mvY < 0 || y + c->mvY + height > c->avctx->height || + !c->rgb_pic) + return -1; + else { + uint8_t *dst = c->pal_pic + x + y * c->pal_stride; + uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride; + uint8_t *src; + uint8_t *rgb_src; + int j; + x += c->mvX; + y += c->mvY; + if (c->last_rgb_pic) { + src = c->last_pal_pic + x + y * c->pal_stride; + rgb_src = c->last_rgb_pic + x * 3 + y * c->rgb_stride; + } else { + src = c->pal_pic + x + y * c->pal_stride; + rgb_src = c->rgb_pic + x * 3 + y * c->rgb_stride; + } + for (j = 0; j < height; j++) { + memmove(dst, src, width); + memmove(rgb_dst, rgb_src, width * 3); + dst += c->pal_stride; + src += c->pal_stride; + rgb_dst += c->rgb_stride; + rgb_src += c->rgb_stride; + } + } + return 0; +} + +static int decode_region_masked(MSS12Context const *c, ArithCoder *acoder, uint8_t *dst, int stride, uint8_t *mask, int mask_stride, int x, int y, int width, int height, PixContext *pctx) { - int i, j; + int i, j, p; + uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride; dst += x + y * stride; mask += x + y * mask_stride; - if (mask[0] == 0xFF) - dst[0] = decode_top_left_pixel(acoder, pctx); for (j = 0; j < height; j++) { for (i = 0; i < width; i++) { - if (!i && !j || mask[i] != 0xFF) - continue; - - dst[i] = decode_pixel_in_context(acoder, pctx, dst + i, stride, - i, j, width - i - 1); + if (c->avctx->err_recognition & AV_EF_EXPLODE && + ( c->rgb_pic && mask[i] != 0x01 && mask[i] != 0x02 && mask[i] != 0x04 || + !c->rgb_pic && mask[i] != 0x80 && mask[i] != 0xFF)) + return -1; + + if (mask[i] == 0x02) { + copy_rectangles(c, x + i, y + j, 1, 1); + } else if (mask[i] == 0x04) { + if (motion_compensation(c, x + i, y + j, 1, 1)) + return -1; + } else if (mask[i] != 0x80) { + if (!i && !j) + p = decode_top_left_pixel(acoder, pctx); + else + p = decode_pixel_in_context(acoder, pctx, dst + i, stride, + i, j, width - i - 1); + dst[i] = p; + if (c->rgb_pic) + AV_WB24(rgb_dst + i * 3, c->pal[p]); + } } - dst += stride; - mask += mask_stride; + dst += stride; + mask += mask_stride; + rgb_dst += c->rgb_stride; } return 0; } -static av_cold void codec_init(MSS12Context *ctx) +static av_cold void codec_init(MSS12Context *c, int version) { - model_init(&ctx->intra_region, 2, THRESH_ADAPTIVE); - model_init(&ctx->inter_region, 2, THRESH_ADAPTIVE); - model_init(&ctx->split_mode, 3, THRESH_HIGH); - model_init(&ctx->edge_mode, 2, THRESH_HIGH); - model_init(&ctx->pivot, 3, THRESH_LOW); - pixctx_init(&ctx->intra_pix_ctx, 8); - pixctx_init(&ctx->inter_pix_ctx, 2); - ctx->corrupted = 1; + int i; + for (i = 0; i < (c->slice_split ? 2 : 1); i++) { + c->sc[i].c = c; + model_init(&c->sc[i].intra_region, 2, THRESH_ADAPTIVE); + model_init(&c->sc[i].inter_region, 2, THRESH_ADAPTIVE); + model_init(&c->sc[i].split_mode, 3, THRESH_HIGH); + model_init(&c->sc[i].edge_mode, 2, THRESH_HIGH); + model_init(&c->sc[i].pivot, 3, THRESH_LOW); + + pixctx_init(&c->sc[i].intra_pix_ctx, 8, c->full_model_syms, 0); + + pixctx_init(&c->sc[i].inter_pix_ctx, version ? 3 : 2, + c->full_model_syms, version ? 1 : 0); + } + c->corrupted = 1; } -void ff_mss12_codec_reset(MSS12Context *ctx) +void ff_mss12_codec_reset(MSS12Context *c) { - model_reset(&ctx->intra_region); - model_reset(&ctx->inter_region); - model_reset(&ctx->split_mode); - model_reset(&ctx->edge_mode); - model_reset(&ctx->pivot); - pixctx_reset(&ctx->intra_pix_ctx); - pixctx_reset(&ctx->inter_pix_ctx); - - ctx->corrupted = 0; + int i; + for (i = 0; i < (c->slice_split ? 2 : 1); i++) { + model_reset(&c->sc[i].intra_region); + model_reset(&c->sc[i].inter_region); + model_reset(&c->sc[i].split_mode); + model_reset(&c->sc[i].edge_mode); + model_reset(&c->sc[i].pivot); + pixctx_reset(&c->sc[i].intra_pix_ctx); + pixctx_reset(&c->sc[i].inter_pix_ctx); + } + + c->corrupted = 0; } -static int decode_pivot(MSS12Context *ctx, ArithCoder *acoder, int base) +static int decode_pivot(SliceContext *sc, ArithCoder *acoder, int base) { int val, inv; - inv = acoder->get_model_sym(acoder, &ctx->edge_mode); - val = acoder->get_model_sym(acoder, &ctx->pivot) + 1; + inv = acoder->get_model_sym(acoder, &sc->edge_mode); + val = acoder->get_model_sym(acoder, &sc->pivot) + 1; if (val > 2) { - if ((base + 1) / 2 - 2 <= 0) { - ctx->corrupted = 1; - return 0; - } + if ((base + 1) / 2 - 2 <= 0) + return -1; + val = acoder->get_number(acoder, (base + 1) / 2 - 2) + 3; } - if (val == base) { - ctx->corrupted = 1; - return 0; - } + if (val >= base) + return -1; return inv ? base - val : val; } -static int decode_region_intra(MSS12Context *ctx, ArithCoder *acoder, +static int decode_region_intra(SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height) { + MSS12Context const *c = sc->c; int mode; - mode = acoder->get_model_sym(acoder, &ctx->intra_region); + mode = acoder->get_model_sym(acoder, &sc->intra_region); if (!mode) { - int i, pix; - int stride = ctx->pic_stride; - uint8_t *dst = ctx->pic_start + x + y * stride; - - pix = decode_top_left_pixel(acoder, &ctx->intra_pix_ctx); - for (i = 0; i < height; i++, dst += stride) + int i, j, pix, rgb_pix; + int stride = c->pal_stride; + int rgb_stride = c->rgb_stride; + uint8_t *dst = c->pal_pic + x + y * stride; + uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * rgb_stride; + + pix = decode_top_left_pixel(acoder, &sc->intra_pix_ctx); + rgb_pix = c->pal[pix]; + for (i = 0; i < height; i++, dst += stride, rgb_dst += rgb_stride) { memset(dst, pix, width); + if (c->rgb_pic) + for (j = 0; j < width * 3; j += 3) + AV_WB24(rgb_dst + j, rgb_pix); + } } else { - return decode_region(ctx, acoder, ctx->pic_start, - x, y, width, height, ctx->pic_stride, - &ctx->intra_pix_ctx); + return decode_region(acoder, c->pal_pic, c->rgb_pic, + x, y, width, height, c->pal_stride, c->rgb_stride, + &sc->intra_pix_ctx, &c->pal[0]); } return 0; } -static int decode_region_inter(MSS12Context *ctx, ArithCoder *acoder, +static int decode_region_inter(SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height) { + MSS12Context const *c = sc->c; int mode; - mode = acoder->get_model_sym(acoder, &ctx->inter_region); + mode = acoder->get_model_sym(acoder, &sc->inter_region); if (!mode) { - mode = decode_top_left_pixel(acoder, &ctx->inter_pix_ctx); - if (mode != 0xFF) { - return 0; - } else { - return decode_region_intra(ctx, acoder, x, y, width, height); - } + mode = decode_top_left_pixel(acoder, &sc->inter_pix_ctx); + + if (c->avctx->err_recognition & AV_EF_EXPLODE && + ( c->rgb_pic && mode != 0x01 && mode != 0x02 && mode != 0x04 || + !c->rgb_pic && mode != 0x80 && mode != 0xFF)) + return -1; + + if (mode == 0x02) + copy_rectangles(c, x, y, width, height); + else if (mode == 0x04) + return motion_compensation(c, x, y, width, height); + else if (mode != 0x80) + return decode_region_intra(sc, acoder, x, y, width, height); } else { - if (decode_region(ctx, acoder, ctx->mask, - x, y, width, height, ctx->mask_linesize, - &ctx->inter_pix_ctx) < 0) + if (decode_region(acoder, c->mask, NULL, + x, y, width, height, c->mask_stride, 0, + &sc->inter_pix_ctx, &c->pal[0]) < 0) return -1; - return decode_region_masked(ctx, acoder, ctx->pic_start, - ctx->pic_stride, ctx->mask, - ctx->mask_linesize, + return decode_region_masked(c, acoder, c->pal_pic, + c->pal_stride, c->mask, + c->mask_stride, x, y, width, height, - &ctx->intra_pix_ctx); + &sc->intra_pix_ctx); } return 0; } -int ff_mss12_decode_rect(MSS12Context *ctx, ArithCoder *acoder, +int ff_mss12_decode_rect(SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height) { int mode, pivot; - if (ctx->corrupted) - return -1; - - mode = acoder->get_model_sym(acoder, &ctx->split_mode); + mode = acoder->get_model_sym(acoder, &sc->split_mode); switch (mode) { case SPLIT_VERT: - pivot = decode_pivot(ctx, acoder, height); - if (ff_mss12_decode_rect(ctx, acoder, x, y, width, pivot)) + if ((pivot = decode_pivot(sc, acoder, height)) < 1) return -1; - if (ff_mss12_decode_rect(ctx, acoder, x, y + pivot, width, height - pivot)) + if (ff_mss12_decode_rect(sc, acoder, x, y, width, pivot)) + return -1; + if (ff_mss12_decode_rect(sc, acoder, x, y + pivot, width, height - pivot)) return -1; break; case SPLIT_HOR: - pivot = decode_pivot(ctx, acoder, width); - if (ff_mss12_decode_rect(ctx, acoder, x, y, pivot, height)) + if ((pivot = decode_pivot(sc, acoder, width)) < 1) + return -1; + if (ff_mss12_decode_rect(sc, acoder, x, y, pivot, height)) return -1; - if (ff_mss12_decode_rect(ctx, acoder, x + pivot, y, width - pivot, height)) + if (ff_mss12_decode_rect(sc, acoder, x + pivot, y, width - pivot, height)) return -1; break; case SPLIT_NONE: - if (ctx->keyframe) - return decode_region_intra(ctx, acoder, x, y, width, height); + if (sc->c->keyframe) + return decode_region_intra(sc, acoder, x, y, width, height); else - return decode_region_inter(ctx, acoder, x, y, width, height); + return decode_region_inter(sc, acoder, x, y, width, height); default: return -1; } @@ -505,13 +595,11 @@ int ff_mss12_decode_rect(MSS12Context *ctx, ArithCoder *acoder, return 0; } -av_cold int ff_mss12_decode_init(AVCodecContext *avctx, int version) +av_cold int ff_mss12_decode_init(MSS12Context *c, int version) { - MSS12Context * const c = avctx->priv_data; + AVCodecContext *avctx = c->avctx; int i; - c->avctx = avctx; - if (avctx->extradata_size < 52 + 256 * 3) { av_log(avctx, AV_LOG_ERROR, "Insufficient extradata size %d\n", avctx->extradata_size); @@ -526,9 +614,23 @@ av_cold int ff_mss12_decode_init(AVCodecContext *avctx, int version) return AVERROR_INVALIDDATA; } + avctx->coded_width = AV_RB32(avctx->extradata + 20); + avctx->coded_height = AV_RB32(avctx->extradata + 24); + if (avctx->coded_width > 4096 || avctx->coded_height > 4096) { + av_log(avctx, AV_LOG_ERROR, "Frame dimensions %dx%d too large", + avctx->coded_width, avctx->coded_height); + return AVERROR_INVALIDDATA; + } + av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d\n", AV_RB32(avctx->extradata + 4), AV_RB32(avctx->extradata + 8)); - c->free_colours = AV_RB32(avctx->extradata + 48); + if (version != AV_RB32(avctx->extradata + 4) > 1) { + av_log(avctx, AV_LOG_ERROR, + "Header version doesn't match codec tag\n"); + return -1; + } + + c->free_colours = AV_RB32(avctx->extradata + 48); if ((unsigned)c->free_colours > 256) { av_log(avctx, AV_LOG_ERROR, "Incorrect number of changeable palette entries: %d\n", @@ -536,8 +638,6 @@ av_cold int ff_mss12_decode_init(AVCodecContext *avctx, int version) return AVERROR_INVALIDDATA; } av_log(avctx, AV_LOG_DEBUG, "%d free colour(s)\n", c->free_colours); - avctx->coded_width = AV_RB32(avctx->extradata + 20); - avctx->coded_height = AV_RB32(avctx->extradata + 24); av_log(avctx, AV_LOG_DEBUG, "Display dimensions %dx%d\n", AV_RB32(avctx->extradata + 12), AV_RB32(avctx->extradata + 16)); @@ -554,27 +654,53 @@ av_cold int ff_mss12_decode_init(AVCodecContext *avctx, int version) av_log(avctx, AV_LOG_DEBUG, "Max. seek time %g ms\n", av_int2float(AV_RB32(avctx->extradata + 44))); - for (i = 0; i < 256; i++) - c->pal[i] = AV_RB24(avctx->extradata + 52 + i * 3); + if (version) { + if (avctx->extradata_size < 60 + 256 * 3) { + av_log(avctx, AV_LOG_ERROR, + "Insufficient extradata size %d for v2\n", + avctx->extradata_size); + return AVERROR_INVALIDDATA; + } + + c->slice_split = AV_RB32(avctx->extradata + 52); + av_log(avctx, AV_LOG_DEBUG, "Slice split %d\n", c->slice_split); - avctx->pix_fmt = PIX_FMT_PAL8; + c->full_model_syms = AV_RB32(avctx->extradata + 56); + if (c->full_model_syms < 2 || c->full_model_syms > 256) { + av_log(avctx, AV_LOG_ERROR, + "Incorrect number of used colours %d\n", + c->full_model_syms); + return AVERROR_INVALIDDATA; + } + av_log(avctx, AV_LOG_DEBUG, "Used colours %d\n", + c->full_model_syms); + } else { + c->slice_split = 0; + c->full_model_syms = 256; + } - c->mask_linesize = FFALIGN(avctx->width, 16); - c->mask = av_malloc(c->mask_linesize * avctx->height); + for (i = 0; i < 256; i++) + c->pal[i] = AV_RB24(avctx->extradata + 52 + + (version ? 8 : 0) + i * 3); + + c->mask_stride = FFALIGN(avctx->width, 16); + c->mask = av_malloc(c->mask_stride * avctx->height); if (!c->mask) { av_log(avctx, AV_LOG_ERROR, "Cannot allocate mask plane\n"); return AVERROR(ENOMEM); } - codec_init(c); + avctx->pix_fmt = version ? c->free_colours == 127 ? PIX_FMT_RGB555 + : PIX_FMT_RGB24 + : PIX_FMT_PAL8; + + codec_init(c, version); return 0; } -av_cold int ff_mss12_decode_end(AVCodecContext *avctx) +av_cold int ff_mss12_decode_end(MSS12Context *c) { - MSS12Context * const c = avctx->priv_data; - av_freep(&c->mask); return 0; diff --git a/libavcodec/mss12.h b/libavcodec/mss12.h index 383d86c..93d1f61 100644 --- a/libavcodec/mss12.h +++ b/libavcodec/mss12.h @@ -26,8 +26,10 @@ #ifndef AVCODEC_MSS12_H #define AVCODEC_MSS12_H +#include "libavutil/intreadwrite.h" #include "avcodec.h" #include "get_bits.h" +#include "bytestream.h" #define MODEL_MIN_SYMS 2 #define MODEL_MAX_SYMS 256 @@ -46,7 +48,10 @@ typedef struct Model { typedef struct ArithCoder { int low, high, value; - GetBitContext *gb; + union { + GetBitContext *gb; + GetByteContext *gB; + } gbc; int (*get_model_sym)(struct ArithCoder *c, Model *m); int (*get_number) (struct ArithCoder *c, int n); } ArithCoder; @@ -56,28 +61,77 @@ typedef struct PixContext { uint8_t cache[12]; Model cache_model, full_model; Model sec_models[4][8][4]; + int special_initial_cache; } PixContext; +struct MSS12Context; + +typedef struct SliceContext { + struct MSS12Context *c; + Model intra_region, inter_region; + Model pivot, edge_mode, split_mode; + PixContext intra_pix_ctx, inter_pix_ctx; +} SliceContext; + typedef struct MSS12Context { AVCodecContext *avctx; - uint8_t *pic_start; - int pic_stride; - uint8_t *mask; - int mask_linesize; uint32_t pal[256]; + uint8_t *pal_pic; + uint8_t *last_pal_pic; + int pal_stride; + uint8_t *mask; + int mask_stride; + uint8_t *rgb_pic; + uint8_t *last_rgb_pic; + int rgb_stride; int free_colours; int keyframe; Model intra_region, inter_region; Model pivot, edge_mode, split_mode; PixContext intra_pix_ctx, inter_pix_ctx; + int mvX, mvY; int corrupted; + int slice_split; + int full_model_syms; + SliceContext sc[2]; } MSS12Context; -int ff_mss12_decode_rect(MSS12Context *ctx, ArithCoder *acoder, +int ff_mss12_decode_rect(SliceContext *ctx, ArithCoder *acoder, int x, int y, int width, int height); void ff_mss12_model_update(Model *m, int val); void ff_mss12_codec_reset(MSS12Context *ctx); -av_cold int ff_mss12_decode_init(AVCodecContext *avctx, int version); -av_cold int ff_mss12_decode_end(AVCodecContext *avctx); +av_cold int ff_mss12_decode_init(MSS12Context *ctx, int version); +av_cold int ff_mss12_decode_end(MSS12Context *ctx); + +#define ARITH_GET_BIT(VERSION) \ +static int arith ## VERSION ## _get_bit(ArithCoder *c) \ +{ \ + int range = c->high - c->low + 1; \ + int bit = (((c->value - c->low) << 1) + 1) / range; \ + \ + if (bit) \ + c->low += range >> 1; \ + else \ + c->high = c->low + (range >> 1) - 1; \ + \ + arith ## VERSION ## _normalise(c); \ + \ + return bit; \ +} + +#define ARITH_GET_MODEL_SYM(VERSION) \ +static int arith ## VERSION ## _get_model_sym(ArithCoder *c, Model *m) \ +{ \ + int idx, val; \ + \ + idx = arith ## VERSION ## _get_prob(c, m->cum_prob); \ + \ + val = m->idx2sym[idx]; \ + ff_mss12_model_update(m, idx); \ + \ + arith ## VERSION ## _normalise(c); \ + \ + return val; \ +} #endif /* AVCODEC_MSS12_H */ diff --git a/libavcodec/mss2.c b/libavcodec/mss2.c new file mode 100644 index 0000000..c0c47dc --- /dev/null +++ b/libavcodec/mss2.c @@ -0,0 +1,860 @@ +/* + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder + */ + +#include "libavutil/avassert.h" +#include "msmpeg4data.h" +#include "vc1.h" +#include "mss12.h" +#include "mss2dsp.h" + +typedef struct MSS2Context { + VC1Context v; + int split_position; + AVFrame pic; + AVFrame last_pic; + MSS12Context c; + MSS2DSPContext dsp; + SliceContext sc[2]; +} MSS2Context; + +static void arith2_normalise(ArithCoder *c) +{ + while ((c->high >> 15) - (c->low >> 15) < 2) { + if ((c->low ^ c->high) & 0x10000) { + c->high ^= 0x8000; + c->value ^= 0x8000; + c->low ^= 0x8000; + } + c->high = c->high << 8 & 0xFFFFFF | 0xFF; + c->value = c->value << 8 & 0xFFFFFF | bytestream2_get_byte(c->gbc.gB); + c->low = c->low << 8 & 0xFFFFFF; + } +} + +ARITH_GET_BIT(2) + +/* L. Stuiver and A. Moffat: "Piecewise Integer Mapping for Arithmetic Coding." + * In Proc. 8th Data Compression Conference (DCC '98), pp. 3-12, Mar. 1998 */ + +static int arith2_get_scaled_value(int value, int n, int range) +{ + int split = (n << 1) - range; + + if (value > split) + return split + (value - split >> 1); + else + return value; +} + +static void arith2_rescale_interval(ArithCoder *c, int range, + int low, int high, int n) +{ + int split = (n << 1) - range; + + if (high > split) + c->high = split + (high - split << 1); + else + c->high = high; + + c->high += c->low - 1; + + if (low > split) + c->low += split + (low - split << 1); + else + c->low += low; +} + +static int arith2_get_number(ArithCoder *c, int n) +{ + int range = c->high - c->low + 1; + int scale = av_log2(range) - av_log2(n); + int val; + + if (n << scale > range) + scale--; + + n <<= scale; + + val = arith2_get_scaled_value(c->value - c->low, n, range) >> scale; + + arith2_rescale_interval(c, range, val << scale, (val + 1) << scale, n); + + arith2_normalise(c); + + return val; +} + +static int arith2_get_prob(ArithCoder *c, int *probs) +{ + int range = c->high - c->low + 1, n = *probs; + int scale = av_log2(range) - av_log2(n); + int i = 0, val; + + if (n << scale > range) + scale--; + + n <<= scale; + + val = arith2_get_scaled_value(c->value - c->low, n, range) >> scale; + while (probs[++i] > val) ; + + arith2_rescale_interval(c, range, + probs[i] << scale, probs[i - 1] << scale, n); + + return i; +} + +ARITH_GET_MODEL_SYM(2) + +static int arith2_get_consumed_bytes(ArithCoder *c) +{ + int diff = (c->high >> 16) - (c->low >> 16); + int bp = bytestream2_tell(c->gbc.gB) - 3 << 3; + int bits = 1; + + while (!(diff & 0x80)) { + bits++; + diff <<= 1; + } + + return (bits + bp + 7 >> 3) + ((c->low >> 16) + 1 == c->high >> 16); +} + +static void arith2_init(ArithCoder *c, GetByteContext *gB) +{ + c->low = 0; + c->high = 0xFFFFFF; + c->value = bytestream2_get_be24(gB); + c->gbc.gB = gB; + c->get_model_sym = arith2_get_model_sym; + c->get_number = arith2_get_number; +} + +static int decode_pal_v2(MSS12Context *ctx, const uint8_t *buf, int buf_size) +{ + int i, ncol; + uint32_t *pal = ctx->pal + 256 - ctx->free_colours; + + if (!ctx->free_colours) + return 0; + + ncol = *buf++; + if (buf_size < 2 + ncol * 3) + return -1; + for (i = 0; i < ncol; i++) + *pal++ = AV_RB24(buf + 3 * i); + + return 1 + ncol * 3; +} + +static int decode_555(GetByteContext *gB, uint16_t *dst, int stride, + int keyframe, int w, int h) +{ + int last_symbol = 0, repeat = 0, prev_avail = 0; + + if (!keyframe) { + int x, y, endx, endy, t; + +#define READ_PAIR(a, b) \ + a = bytestream2_get_byte(gB) << 4; \ + t = bytestream2_get_byte(gB); \ + a |= t >> 4; \ + b = (t & 0xF) << 8; \ + b |= bytestream2_get_byte(gB); \ + + READ_PAIR(x, endx) + READ_PAIR(y, endy) + + if (endx >= w || endy >= h || x > endx || y > endy) + return -1; + dst += x + stride * y; + w = endx - x + 1; + h = endy - y + 1; + if (y) + prev_avail = 1; + } + + do { + uint16_t *p = dst; + do { + if (repeat-- < 1) { + int b = bytestream2_get_byte(gB); + if (b < 128) + last_symbol = b << 8 | bytestream2_get_byte(gB); + else if (b > 129) { + repeat = 0; + while (b-- > 130) + repeat = (repeat << 8) + bytestream2_get_byte(gB) + 1; + if (last_symbol == -2) { + int skip = FFMIN((unsigned)repeat, dst + w - p); + repeat -= skip; + p += skip; + } + } else + last_symbol = 127 - b; + } + if (last_symbol >= 0) + *p = last_symbol; + else if (last_symbol == -1 && prev_avail) + *p = *(p - stride); + } while (++p < dst + w); + dst += stride; + prev_avail = 1; + } while (--h); + + return 0; +} + +static int decode_rle(GetBitContext *gb, uint8_t *pal_dst, int pal_stride, + uint8_t *rgb_dst, int rgb_stride, uint32_t *pal, + int keyframe, int kf_slipt, int slice, int w, int h) +{ + uint8_t bits[270] = { 0 }; + uint32_t codes[270]; + VLC vlc; + + int current_length = 0, read_codes = 0, next_code = 0, current_codes = 0; + int remaining_codes, surplus_codes, i; + + const int alphabet_size = 270 - keyframe; + + int last_symbol = 0, repeat = 0, prev_avail = 0; + + if (!keyframe) { + int x, y, clipw, cliph; + + x = get_bits(gb, 12); + y = get_bits(gb, 12); + clipw = get_bits(gb, 12) + 1; + cliph = get_bits(gb, 12) + 1; + + if (x + clipw > w || y + cliph > h) + return AVERROR_INVALIDDATA; + pal_dst += pal_stride * y + x; + rgb_dst += rgb_stride * y + x * 3; + w = clipw; + h = cliph; + if (y) + prev_avail = 1; + } else { + if (slice > 0) { + pal_dst += pal_stride * kf_slipt; + rgb_dst += rgb_stride * kf_slipt; + prev_avail = 1; + h -= kf_slipt; + } else + h = kf_slipt; + } + + /* read explicit codes */ + do { + while (current_codes--) { + int symbol = get_bits(gb, 8); + if (symbol >= 204 - keyframe) + symbol += 14 - keyframe; + else if (symbol > 189) + symbol = get_bits1(gb) + (symbol << 1) - 190; + if (bits[symbol]) + return AVERROR_INVALIDDATA; + bits[symbol] = current_length; + codes[symbol] = next_code++; + read_codes++; + } + current_length++; + next_code <<= 1; + remaining_codes = (1 << current_length) - next_code; + current_codes = get_bits(gb, av_ceil_log2(remaining_codes + 1)); + if (current_length > 22 || current_codes > remaining_codes) + return AVERROR_INVALIDDATA; + } while (current_codes != remaining_codes); + + remaining_codes = alphabet_size - read_codes; + + /* determine the minimum length to fit the rest of the alphabet */ + while ((surplus_codes = (2 << current_length) - + (next_code << 1) - remaining_codes) < 0) { + current_length++; + next_code <<= 1; + } + + /* add the rest of the symbols lexicographically */ + for (i = 0; i < alphabet_size; i++) + if (!bits[i]) { + if (surplus_codes-- == 0) { + current_length++; + next_code <<= 1; + } + bits[i] = current_length; + codes[i] = next_code++; + } + + if (next_code != 1 << current_length) + return AVERROR_INVALIDDATA; + + if (i = init_vlc(&vlc, 9, alphabet_size, bits, 1, 1, codes, 4, 4, 0)) + return i; + + /* frame decode */ + do { + uint8_t *pp = pal_dst; + uint8_t *rp = rgb_dst; + do { + if (repeat-- < 1) { + int b = get_vlc2(gb, vlc.table, 9, 3); + if (b < 256) + last_symbol = b; + else if (b < 268) { + b -= 256; + if (b == 11) + b = get_bits(gb, 4) + 10; + + if (!b) + repeat = 0; + else + repeat = get_bits(gb, b); + + while (b--) + repeat += 1 << b; + + if (last_symbol == -2) { + int skip = FFMIN(repeat, pal_dst + w - pp); + repeat -= skip; + pp += skip; + rp += skip * 3; + } + } else + last_symbol = 267 - b; + } + if (last_symbol >= 0) { + *pp = last_symbol; + AV_WB24(rp, pal[last_symbol]); + } else if (last_symbol == -1 && prev_avail) { + *pp = *(pp - pal_stride); + memcpy(rp, rp - rgb_stride, 3); + } + rp += 3; + } while (++pp < pal_dst + w); + pal_dst += pal_stride; + rgb_dst += rgb_stride; + prev_avail = 1; + } while (--h); + + ff_free_vlc(&vlc); + return 0; +} + +static int decode_wmv9(AVCodecContext *avctx, const uint8_t *buf, int buf_size, + int x, int y, int w, int h, int wmv9_mask) +{ + MSS2Context *ctx = avctx->priv_data; + MSS12Context *c = &ctx->c; + VC1Context *v = avctx->priv_data; + MpegEncContext *s = &v->s; + AVFrame *f; + + ff_mpeg_flush(avctx); + + if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) { + int i = ff_find_unused_picture(s, 0); + if (i < 0) + return -1; + s->current_picture_ptr = &s->picture[i]; + } + + init_get_bits(&s->gb, buf, buf_size * 8); + + s->loop_filter = avctx->skip_loop_filter < AVDISCARD_ALL; + + if (ff_vc1_parse_frame_header(v, &s->gb) == -1) { + av_log(v->s.avctx, AV_LOG_ERROR, "header error\n"); + return AVERROR_INVALIDDATA; + } + + if (s->pict_type != AV_PICTURE_TYPE_I) { + av_log(v->s.avctx, AV_LOG_ERROR, "expected I-frame\n"); + return AVERROR_INVALIDDATA; + } + + avctx->pix_fmt = PIX_FMT_YUV420P; + + if (ff_MPV_frame_start(s, avctx) < 0) { + av_log(v->s.avctx, AV_LOG_ERROR, "ff_MPV_frame_start error\n"); + avctx->pix_fmt = PIX_FMT_RGB24; + return -1; + } + + ff_er_frame_start(s); + + v->bits = buf_size * 8; + + v->end_mb_x = (w + 15) >> 4; + s->end_mb_y = (h + 15) >> 4; + if (v->respic & 1) + v->end_mb_x = v->end_mb_x + 1 >> 1; + if (v->respic & 2) + s->end_mb_y = s->end_mb_y + 1 >> 1; + + ff_vc1_decode_blocks(v); + + ff_er_frame_end(s); + + ff_MPV_frame_end(s); + + f = &s->current_picture.f; + + if (v->respic == 3) { + ctx->dsp.upsample_plane(f->data[0], f->linesize[0], w, h); + ctx->dsp.upsample_plane(f->data[1], f->linesize[1], w >> 1, h >> 1); + ctx->dsp.upsample_plane(f->data[2], f->linesize[2], w >> 1, h >> 1); + } else if (v->respic) + av_log_ask_for_sample(v->s.avctx, + "Asymmetric WMV9 rectangle subsampling\n"); + + av_assert0(f->linesize[1] == f->linesize[2]); + + if (wmv9_mask != -1) + ctx->dsp.mss2_blit_wmv9_masked(c->rgb_pic + y * c->rgb_stride + x * 3, + c->rgb_stride, wmv9_mask, + c->pal_pic + y * c->pal_stride + x, + c->pal_stride, + f->data[0], f->linesize[0], + f->data[1], f->data[2], f->linesize[1], + w, h); + else + ctx->dsp.mss2_blit_wmv9(c->rgb_pic + y * c->rgb_stride + x * 3, + c->rgb_stride, + f->data[0], f->linesize[0], + f->data[1], f->data[2], f->linesize[1], + w, h); + + avctx->pix_fmt = PIX_FMT_RGB24; + + return 0; +} + +typedef struct Rectangle { + int coded, x, y, w, h; +} Rectangle; + +#define MAX_WMV9_RECTANGLES 20 +#define ARITH2_PADDING 2 + +static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *data_size, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + MSS2Context *ctx = avctx->priv_data; + MSS12Context *c = &ctx->c; + GetBitContext gb; + GetByteContext gB; + ArithCoder acoder; + + int keyframe, has_wmv9, has_mv, is_rle, is_555, ret; + + Rectangle wmv9rects[MAX_WMV9_RECTANGLES], *r; + int used_rects = 0, i, implicit_rect, av_uninit(wmv9_mask); + + av_assert0(FF_INPUT_BUFFER_PADDING_SIZE >= + ARITH2_PADDING + (MIN_CACHE_BITS + 7) / 8); + + init_get_bits(&gb, buf, buf_size * 8); + + if (keyframe = get_bits1(&gb)) + skip_bits(&gb, 7); + has_wmv9 = get_bits1(&gb); + has_mv = keyframe ? 0 : get_bits1(&gb); + is_rle = get_bits1(&gb); + is_555 = is_rle && get_bits1(&gb); + if (c->slice_split > 0) + ctx->split_position = c->slice_split; + else if (c->slice_split < 0) { + if (get_bits1(&gb)) { + if (get_bits1(&gb)) { + if (get_bits1(&gb)) + ctx->split_position = get_bits(&gb, 16); + else + ctx->split_position = get_bits(&gb, 12); + } else + ctx->split_position = get_bits(&gb, 8) << 4; + } else { + if (keyframe) + ctx->split_position = avctx->height / 2; + } + } else + ctx->split_position = avctx->height; + + if (c->slice_split && (ctx->split_position < 1 - is_555 || + ctx->split_position > avctx->height - 1)) + return AVERROR_INVALIDDATA; + + align_get_bits(&gb); + buf += get_bits_count(&gb) >> 3; + buf_size -= get_bits_count(&gb) >> 3; + + if (buf_size < 1) + return AVERROR_INVALIDDATA; + + if (is_555 && (has_wmv9 || has_mv || c->slice_split && ctx->split_position)) + return AVERROR_INVALIDDATA; + + avctx->pix_fmt = is_555 ? PIX_FMT_RGB555 : PIX_FMT_RGB24; + if (ctx->pic.data[0] && ctx->pic.format != avctx->pix_fmt) + avctx->release_buffer(avctx, &ctx->pic); + + if (has_wmv9) { + bytestream2_init(&gB, buf, buf_size + ARITH2_PADDING); + arith2_init(&acoder, &gB); + + implicit_rect = !arith2_get_bit(&acoder); + + while (arith2_get_bit(&acoder)) { + if (used_rects == MAX_WMV9_RECTANGLES) + return AVERROR_INVALIDDATA; + r = &wmv9rects[used_rects]; + if (!used_rects) + r->x = arith2_get_number(&acoder, avctx->width); + else + r->x = arith2_get_number(&acoder, avctx->width - + wmv9rects[used_rects - 1].x) + + wmv9rects[used_rects - 1].x; + r->y = arith2_get_number(&acoder, avctx->height); + r->w = arith2_get_number(&acoder, avctx->width - r->x) + 1; + r->h = arith2_get_number(&acoder, avctx->height - r->y) + 1; + used_rects++; + } + + if (implicit_rect && used_rects) { + av_log(avctx, AV_LOG_ERROR, "implicit_rect && used_rects > 0\n"); + return AVERROR_INVALIDDATA; + } + + if (implicit_rect) { + wmv9rects[0].x = 0; + wmv9rects[0].y = 0; + wmv9rects[0].w = avctx->width; + wmv9rects[0].h = avctx->height; + + used_rects = 1; + } + for (i = 0; i < used_rects; i++) { + if (!implicit_rect && arith2_get_bit(&acoder)) { + av_log(avctx, AV_LOG_ERROR, "Unexpected grandchildren\n"); + return AVERROR_INVALIDDATA; + } + if (!i) { + wmv9_mask = arith2_get_bit(&acoder) - 1; + if (!wmv9_mask) + wmv9_mask = arith2_get_number(&acoder, 256); + } + wmv9rects[i].coded = arith2_get_number(&acoder, 2); + } + + buf += arith2_get_consumed_bytes(&acoder); + buf_size -= arith2_get_consumed_bytes(&acoder); + if (buf_size < 1) + return AVERROR_INVALIDDATA; + } + + c->mvX = c->mvY = 0; + if (keyframe && !is_555) { + if ((i = decode_pal_v2(c, buf, buf_size)) < 0) + return AVERROR_INVALIDDATA; + buf += i; + buf_size -= i; + } else if (has_mv) { + buf += 4; + buf_size -= 4; + if (buf_size < 1) + return AVERROR_INVALIDDATA; + c->mvX = AV_RB16(buf - 4) - avctx->width; + c->mvY = AV_RB16(buf - 2) - avctx->height; + } + + if (c->mvX < 0 || c->mvY < 0) { + FFSWAP(AVFrame, ctx->pic, ctx->last_pic); + FFSWAP(uint8_t *, c->pal_pic, c->last_pal_pic); + + if (ctx->pic.data[0]) + avctx->release_buffer(avctx, &ctx->pic); + + ctx->pic.reference = 3; + ctx->pic.buffer_hints = FF_BUFFER_HINTS_VALID | + FF_BUFFER_HINTS_READABLE | + FF_BUFFER_HINTS_PRESERVE | + FF_BUFFER_HINTS_REUSABLE; + + if ((ret = avctx->get_buffer(avctx, &ctx->pic)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + + if (ctx->last_pic.data[0]) { + av_assert0(ctx->pic.linesize[0] == ctx->last_pic.linesize[0]); + c->last_rgb_pic = ctx->last_pic.data[0] + + ctx->last_pic.linesize[0] * (avctx->height - 1); + } else { + av_log(avctx, AV_LOG_ERROR, "Missing keyframe\n"); + return -1; + } + } else { + if (ctx->last_pic.data[0]) + avctx->release_buffer(avctx, &ctx->last_pic); + + ctx->pic.reference = 3; + ctx->pic.buffer_hints = FF_BUFFER_HINTS_VALID | + FF_BUFFER_HINTS_READABLE | + FF_BUFFER_HINTS_PRESERVE | + FF_BUFFER_HINTS_REUSABLE; + + if ((ret = avctx->reget_buffer(avctx, &ctx->pic)) < 0) { + av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); + return ret; + } + + c->last_rgb_pic = NULL; + } + c->rgb_pic = ctx->pic.data[0] + + ctx->pic.linesize[0] * (avctx->height - 1); + c->rgb_stride = -ctx->pic.linesize[0]; + + ctx->pic.key_frame = keyframe; + ctx->pic.pict_type = keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P; + + if (is_555) { + bytestream2_init(&gB, buf, buf_size); + + if (decode_555(&gB, (uint16_t *)c->rgb_pic, c->rgb_stride >> 1, + keyframe, avctx->width, avctx->height)) + return AVERROR_INVALIDDATA; + + buf_size -= bytestream2_tell(&gB); + } else if (is_rle) { + init_get_bits(&gb, buf, buf_size * 8); + if (ret = decode_rle(&gb, c->pal_pic, c->pal_stride, + c->rgb_pic, c->rgb_stride, c->pal, keyframe, + ctx->split_position, 0, + avctx->width, avctx->height)) + return ret; + align_get_bits(&gb); + + if (c->slice_split) + if (ret = decode_rle(&gb, c->pal_pic, c->pal_stride, + c->rgb_pic, c->rgb_stride, c->pal, keyframe, + ctx->split_position, 1, + avctx->width, avctx->height)) + return ret; + + align_get_bits(&gb); + buf += get_bits_count(&gb) >> 3; + buf_size -= get_bits_count(&gb) >> 3; + } else { + if (keyframe) + ff_mss12_codec_reset(c); + else if (c->corrupted) + return AVERROR_INVALIDDATA; + bytestream2_init(&gB, buf, buf_size + ARITH2_PADDING); + arith2_init(&acoder, &gB); + c->keyframe = keyframe; + if (c->corrupted = ff_mss12_decode_rect(&c->sc[0], &acoder, 0, 0, + avctx->width, + ctx->split_position)) + return AVERROR_INVALIDDATA; + + buf += arith2_get_consumed_bytes(&acoder); + buf_size -= arith2_get_consumed_bytes(&acoder); + if (c->slice_split) { + if (buf_size < 1) + return AVERROR_INVALIDDATA; + bytestream2_init(&gB, buf, buf_size + ARITH2_PADDING); + arith2_init(&acoder, &gB); + if (c->corrupted = ff_mss12_decode_rect(&c->sc[1], &acoder, 0, + ctx->split_position, + avctx->width, + avctx->height - ctx->split_position)) + return AVERROR_INVALIDDATA; + + buf += arith2_get_consumed_bytes(&acoder); + buf_size -= arith2_get_consumed_bytes(&acoder); + } + } + + if (has_wmv9) { + for (i = 0; i < used_rects; i++) { + int x = wmv9rects[i].x; + int y = wmv9rects[i].y; + int w = wmv9rects[i].w; + int h = wmv9rects[i].h; + if (wmv9rects[i].coded) { + int WMV9codedFrameSize; + if (buf_size < 4 || !(WMV9codedFrameSize = AV_RL24(buf))) + return AVERROR_INVALIDDATA; + if (ret = decode_wmv9(avctx, buf + 3, buf_size - 3, + x, y, w, h, wmv9_mask)) + return ret; + buf += WMV9codedFrameSize + 3; + buf_size -= WMV9codedFrameSize + 3; + } else { + uint8_t *dst = c->rgb_pic + y * c->rgb_stride + x * 3; + if (wmv9_mask != -1) { + ctx->dsp.mss2_gray_fill_masked(dst, c->rgb_stride, + wmv9_mask, + c->pal_pic + y * c->pal_stride + x, + c->pal_stride, + w, h); + } else { + do { + memset(dst, 0x80, w * 3); + dst += c->rgb_stride; + } while (--h); + } + } + } + } + + if (buf_size) + av_log(avctx, AV_LOG_WARNING, "buffer not fully consumed\n"); + + *data_size = sizeof(AVFrame); + *(AVFrame *)data = ctx->pic; + + return avpkt->size; +} + +static av_cold int wmv9_init(AVCodecContext *avctx) +{ + VC1Context *v = avctx->priv_data; + + v->s.avctx = avctx; + avctx->flags |= CODEC_FLAG_EMU_EDGE; + v->s.flags |= CODEC_FLAG_EMU_EDGE; + + if (avctx->idct_algo == FF_IDCT_AUTO) + avctx->idct_algo = FF_IDCT_WMV2; + + if (ff_vc1_init_common(v) < 0) + return -1; + ff_vc1dsp_init(&v->vc1dsp); + + v->profile = PROFILE_MAIN; + + v->zz_8x4 = ff_wmv2_scantableA; + v->zz_4x8 = ff_wmv2_scantableB; + v->res_y411 = 0; + v->res_sprite = 0; + + v->frmrtq_postproc = 7; + v->bitrtq_postproc = 31; + + v->res_x8 = 0; + v->multires = 0; + v->res_fasttx = 1; + + v->fastuvmc = 0; + + v->extended_mv = 0; + + v->dquant = 1; + v->vstransform = 1; + + v->res_transtab = 0; + + v->overlap = 0; + + v->s.resync_marker = 0; + v->rangered = 0; + + v->s.max_b_frames = avctx->max_b_frames = 0; + v->quantizer_mode = 0; + + v->finterpflag = 0; + + v->res_rtm_flag = 1; + + ff_vc1_init_transposed_scantables(v); + + if (ff_msmpeg4_decode_init(avctx) < 0 || + ff_vc1_decode_init_alloc_tables(v) < 0) + return -1; + + /* error concealment */ + v->s.me.qpel_put = v->s.dsp.put_qpel_pixels_tab; + v->s.me.qpel_avg = v->s.dsp.avg_qpel_pixels_tab; + + return 0; +} + +static av_cold int mss2_decode_end(AVCodecContext *avctx) +{ + MSS2Context *const ctx = avctx->priv_data; + + if (ctx->pic.data[0]) + avctx->release_buffer(avctx, &ctx->pic); + if (ctx->last_pic.data[0]) + avctx->release_buffer(avctx, &ctx->last_pic); + + ff_mss12_decode_end(&ctx->c); + av_freep(&ctx->c.pal_pic); + av_freep(&ctx->c.last_pal_pic); + ff_vc1_decode_end(avctx); + + return 0; +} + +static av_cold int mss2_decode_init(AVCodecContext *avctx) +{ + MSS2Context * const ctx = avctx->priv_data; + MSS12Context *c = &ctx->c; + int ret; + c->avctx = avctx; + avctx->coded_frame = &ctx->pic; + if (ret = ff_mss12_decode_init(c, 1)) + return ret; + c->pal_stride = c->mask_stride; + c->pal_pic = av_malloc(c->pal_stride * avctx->height); + c->last_pal_pic = av_malloc(c->pal_stride * avctx->height); + if (!c->pal_pic || !c->last_pal_pic) { + mss2_decode_end(avctx); + return AVERROR(ENOMEM); + } + if (ret = wmv9_init(avctx)) { + mss2_decode_end(avctx); + return ret; + } + ff_mss2dsp_init(&ctx->dsp); + return 0; +} + +AVCodec ff_mss2_decoder = { + .name = "mss2", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MSS2, + .priv_data_size = sizeof(MSS2Context), + .init = mss2_decode_init, + .close = mss2_decode_end, + .decode = mss2_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("MS Windows Media Video V9 Screen"), +}; diff --git a/libavcodec/mss2dsp.c b/libavcodec/mss2dsp.c new file mode 100644 index 0000000..aa13577 --- /dev/null +++ b/libavcodec/mss2dsp.c @@ -0,0 +1,153 @@ +/* + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines + */ + +#include "mss2dsp.h" +#include "libavutil/common.h" + +static av_always_inline void mss2_blit_wmv9_template(uint8_t *dst, + int dst_stride, + int gray, + int use_mask, + int maskcolor, + const uint8_t *mask, + int mask_stride, + const uint8_t *srcy, + int srcy_stride, + const uint8_t *srcu, + const uint8_t *srcv, + int srcuv_stride, + int w, int h) +{ + int i, j, k, r = -1; + while (++r < h) { + for (i = 0, j = 0, k = 0; i < w; j += (i & 1), i++, k += 3) { + if (!use_mask || mask[i] == maskcolor) { + if (gray) { + dst[k] = dst[k + 1] = dst[k + 2] = 0x80; + } else { + int y = srcy[i]; + int u = srcu[j] - 128; + int v = srcv[j] - 128; + dst[k] = av_clip_uint8(y + ( 91881 * v + 32768 >> 16)); + dst[k + 1] = av_clip_uint8(y + (-22554 * u - 46802 * v + 32768 >> 16)); + dst[k + 2] = av_clip_uint8(y + (116130 * u + 32768 >> 16)); + } + } + } + mask += mask_stride; + dst += dst_stride; + srcy += srcy_stride; + srcu += srcuv_stride * (r & 1); + srcv += srcuv_stride * (r & 1); + } +} + +static void mss2_blit_wmv9_c(uint8_t *dst, int dst_stride, + const uint8_t *srcy, int srcy_stride, + const uint8_t *srcu, const uint8_t *srcv, + int srcuv_stride, int w, int h) +{ + mss2_blit_wmv9_template(dst, dst_stride, 0, 0, + 0, NULL, 0, + srcy, srcy_stride, + srcu, srcv, srcuv_stride, + w, h); +} + +static void mss2_blit_wmv9_masked_c(uint8_t *dst, int dst_stride, + int maskcolor, const uint8_t *mask, + int mask_stride, + const uint8_t *srcy, int srcy_stride, + const uint8_t *srcu, const uint8_t *srcv, + int srcuv_stride, int w, int h) +{ + mss2_blit_wmv9_template(dst, dst_stride, 0, 1, + maskcolor, mask, mask_stride, + srcy, srcy_stride, + srcu, srcv, srcuv_stride, + w, h); +} + +static void mss2_gray_fill_masked_c(uint8_t *dst, int dst_stride, + int maskcolor, const uint8_t *mask, + int mask_stride, int w, int h) +{ + mss2_blit_wmv9_template(dst, dst_stride, 1, 1, + maskcolor, mask, mask_stride, + NULL, 0, + NULL, NULL, 0, + w, h); +} + +static void upsample_plane_c(uint8_t *plane, int plane_stride, int w, int h) +{ + uint8_t *src1, *src2, *dst1, *dst2, *p, a, b; + int i, j; + + w += (w & 1); + h += (h & 1); + + j = h - 1; + + memcpy(plane + plane_stride * j, + plane + plane_stride * (j >> 1), + w); + + while ((j -= 2) > 0) { + dst1 = plane + plane_stride * (j + 1); + dst2 = plane + plane_stride * j; + src1 = plane + plane_stride * ((j + 1) >> 1); + src2 = plane + plane_stride * ( j >> 1); + + for (i = (w - 1) >> 1; i >= 0; i--) { + a = src1[i]; + b = src2[i]; + dst1[i] = (3 * a + b + 2) >> 2; + dst2[i] = (a + 3 * b + 2) >> 2; + } + } + + for (j = h - 1; j >= 0; j--) { + p = plane + plane_stride * j; + i = w - 1; + + p[i] = p[i >> 1]; + + while ((i -= 2) > 0) { + a = p[ i >> 1]; + b = p[(i + 1) >> 1]; + p[i] = (3 * a + b + 1) >> 2; + p[i + 1] = (a + 3 * b + 1) >> 2; + } + } +} + +av_cold void ff_mss2dsp_init(MSS2DSPContext* dsp) +{ + dsp->mss2_blit_wmv9 = mss2_blit_wmv9_c; + dsp->mss2_blit_wmv9_masked = mss2_blit_wmv9_masked_c; + dsp->mss2_gray_fill_masked = mss2_gray_fill_masked_c; + dsp->upsample_plane = upsample_plane_c; +} diff --git a/libavcodec/mss2dsp.h b/libavcodec/mss2dsp.h new file mode 100644 index 0000000..b3d67a1 --- /dev/null +++ b/libavcodec/mss2dsp.h @@ -0,0 +1,50 @@ +/* + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines + */ + +#ifndef AVCODEC_MSS2DSP_H +#define AVCODEC_MSS2DSP_H + +#include "dsputil.h" + +typedef struct MSS2DSPContext { + void (*mss2_blit_wmv9)(uint8_t *dst, int dst_stride, + const uint8_t *srcy, int srcy_stride, + const uint8_t *srcu, const uint8_t *srcv, + int srcuv_stride, int w, int h); + void (*mss2_blit_wmv9_masked)(uint8_t *dst, int dst_stride, + int maskcolor, const uint8_t *mask, + int mask_stride, + const uint8_t *srcy, int srcy_stride, + const uint8_t *srcu, const uint8_t *srcv, + int srcuv_stride, int w, int h); + void (*mss2_gray_fill_masked)(uint8_t *dst, int dst_stride, + int maskcolor, const uint8_t *mask, + int mask_stride, int w, int h); + void (*upsample_plane)(uint8_t *plane, int plane_stride, int w, int h); +} MSS2DSPContext; + +av_cold void ff_mss2dsp_init(MSS2DSPContext* dsp); + +#endif /* AVCODEC_MSS2DSP_H */ diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c index 0e218af..de75aac 100644 --- a/libavcodec/vc1.c +++ b/libavcodec/vc1.c @@ -578,7 +578,12 @@ int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb) if (v->finterpflag) v->interpfrm = get_bits1(gb); - skip_bits(gb, 2); //framecnt unused + if (v->s.avctx->codec->id == AV_CODEC_ID_MSS2) + v->respic = + v->rangered = + v->multires = get_bits(gb, 2) == 1; + else + skip_bits(gb, 2); //framecnt unused v->rangeredfrm = 0; if (v->rangered) v->rangeredfrm = get_bits1(gb); diff --git a/libavcodec/vc1.h b/libavcodec/vc1.h index fe21f2f..13011ae 100644 --- a/libavcodec/vc1.h +++ b/libavcodec/vc1.h @@ -394,6 +394,8 @@ typedef struct VC1Context{ uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element) uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element) + int end_mb_x; ///< Horizontal macroblock limit (used only by mss2) + int parse_only; ///< Context is used within parser int warn_interlaced; diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index 63c0949..6b2662e 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -4348,10 +4348,10 @@ static void vc1_decode_i_blocks(VC1Context *v) s->mb_x = s->mb_y = 0; s->mb_intra = 1; s->first_slice_line = 1; - for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) { + for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) { s->mb_x = 0; ff_init_block_index(s); - for (; s->mb_x < s->mb_width; s->mb_x++) { + for (; s->mb_x < v->end_mb_x; s->mb_x++) { uint8_t *dst[6]; ff_update_block_index(s); dst[0] = s->dest[0]; @@ -4438,7 +4438,10 @@ static void vc1_decode_i_blocks(VC1Context *v) s->first_slice_line = 0; } if (v->s.loop_filter) - ff_draw_horiz_band(s, (s->mb_height - 1) * 16, 16); + ff_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16); + + /* This is intentionally mb_height and not end_mb_y - unlike in advanced + * profile, these only differ are when decoding MSS2 rectangles. */ ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END); } @@ -5549,6 +5552,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, ff_er_frame_start(s); v->bits = buf_size * 8; + v->end_mb_x = s->mb_width; if (v->field_mode) { uint8_t *tmp[2]; s->current_picture.f.linesize[0] <<= 1; diff --git a/libavcodec/version.h b/libavcodec/version.h index 78f4ccf..b08f00d 100644 --- a/libavcodec/version.h +++ b/libavcodec/version.h @@ -27,8 +27,8 @@ */ #define LIBAVCODEC_VERSION_MAJOR 54 -#define LIBAVCODEC_VERSION_MINOR 26 -#define LIBAVCODEC_VERSION_MICRO 1 +#define LIBAVCODEC_VERSION_MINOR 27 +#define LIBAVCODEC_VERSION_MICRO 0 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ LIBAVCODEC_VERSION_MINOR, \ diff --git a/libavformat/riff.c b/libavformat/riff.c index 6920115..f963890 100644 --- a/libavformat/riff.c +++ b/libavformat/riff.c @@ -289,6 +289,7 @@ const AVCodecTag ff_codec_bmp_tags[] = { { AV_CODEC_ID_TSCC2, MKTAG('T', 'S', 'C', '2') }, { AV_CODEC_ID_MTS2, MKTAG('M', 'T', 'S', '2') }, { AV_CODEC_ID_CLLC, MKTAG('C', 'L', 'L', 'C') }, + { AV_CODEC_ID_MSS2, MKTAG('M', 'S', 'S', '2') }, { AV_CODEC_ID_NONE, 0 } }; -- cgit v1.1