From 9155c595f1a9c5a089a59e2c0aefdfabd0a6c59b Mon Sep 17 00:00:00 2001 From: Derek Buitenhuis Date: Sat, 19 Apr 2014 18:46:52 -0400 Subject: [PATCH] fic: Support rendering cursors Signed-off-by: Derek Buitenhuis --- libavcodec/fic.c | 112 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 111 insertions(+), 1 deletion(-) diff --git a/libavcodec/fic.c b/libavcodec/fic.c index f0e7116318..f5a2ffe369 100644 --- a/libavcodec/fic.c +++ b/libavcodec/fic.c @@ -38,6 +38,7 @@ typedef struct FICThreadContext { typedef struct FICContext { AVCodecContext *avctx; AVFrame *frame; + AVFrame *final_frame; FICThreadContext *slice_data; int slice_data_size; @@ -48,6 +49,8 @@ typedef struct FICContext { int aligned_width, aligned_height; int num_slices, slice_h; + + uint8_t cursor_buf[4096]; } FICContext; static const uint8_t fic_qmat_hq[64] = { @@ -186,6 +189,69 @@ static int fic_decode_slice(AVCodecContext *avctx, void *tdata) return 0; } +static av_always_inline void fic_alpha_blend(uint8_t *dst, uint8_t *src, + int size, uint8_t *alpha) +{ + int i; + + for (i = 0; i < size; i++) + dst[i] = (dst[i] * (256 - alpha[i]) + src[i] * alpha[i]) >> 8; +} + +static void fic_draw_cursor(AVCodecContext *avctx, int cur_x, int cur_y) +{ + FICContext *ctx = avctx->priv_data; + uint8_t *ptr = ctx->cursor_buf; + uint8_t *dstptr[3]; + uint8_t planes[4][1024]; + uint8_t chroma[3][256]; + int i, j, p; + + /* Convert to YUVA444. */ + for (i = 0; i < 1024; i++) { + planes[0][i] = av_clip_uint8((( 25 * ptr[0] + 129 * ptr[1] + 66 * ptr[2]) / 255) + 16); + planes[1][i] = av_clip_uint8(((-38 * ptr[0] + 112 * ptr[1] + -74 * ptr[2]) / 255) + 128); + planes[2][i] = av_clip_uint8(((-18 * ptr[0] + 112 * ptr[1] + -94 * ptr[2]) / 255) + 128); + planes[3][i] = ptr[3]; + + ptr += 4; + } + + /* Subsample chroma. */ + for (i = 0; i < 32; i += 2) + for (j = 0; j < 32; j += 2) + for (p = 0; p < 3; p++) + chroma[p][16 * (i / 2) + j / 2] = (planes[p + 1][32 * i + j ] + + planes[p + 1][32 * i + j + 1] + + planes[p + 1][32 * (i + 1) + j ] + + planes[p + 1][32 * (i + 1) + j + 1]) / 4; + + /* Seek to x/y pos of cursor. */ + for (i = 0; i < 3; i++) + dstptr[i] = ctx->final_frame->data[i] + + (ctx->final_frame->linesize[i] * (cur_y >> !!i)) + + (cur_x >> !!i) + !!i; + + /* Copy. */ + for (i = 0; i < FFMIN(32, avctx->height - cur_y) - 1; i += 2) { + int lsize = FFMIN(32, avctx->width - cur_x); + int csize = lsize / 2; + + fic_alpha_blend(dstptr[0], + planes[0] + i * 32, lsize, planes[3] + i * 32); + fic_alpha_blend(dstptr[0] + ctx->final_frame->linesize[0], + planes[0] + (i + 1) * 32, lsize, planes[3] + (i + 1) * 32); + fic_alpha_blend(dstptr[1], + chroma[0] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16); + fic_alpha_blend(dstptr[2], + chroma[1] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16); + + dstptr[0] += ctx->final_frame->linesize[0] * 2; + dstptr[1] += ctx->final_frame->linesize[1]; + dstptr[2] += ctx->final_frame->linesize[2]; + } +} + static int fic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { @@ -195,6 +261,8 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data, int slice, nslices; int msize; int tsize; + int cur_x, cur_y; + int skip_cursor = 0; uint8_t *sdata; if ((ret = ff_reget_buffer(avctx, ctx->frame)) < 0) { @@ -232,6 +300,28 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data, return AVERROR_INVALIDDATA; } + if (tsize < 32) { + av_log(avctx, AV_LOG_WARNING, + "Cursor data too small. Skipping cursor.\n"); + skip_cursor = 1; + } + + /* Cursor position. */ + cur_x = AV_RL16(src + 33); + cur_y = AV_RL16(src + 35); + if (cur_x > avctx->width || cur_y > avctx->height) { + av_log(avctx, AV_LOG_WARNING, + "Invalid cursor position: (%d,%d). Skipping cusor.\n", + cur_x, cur_y); + skip_cursor = 1; + } + + if (AV_RL16(src + 37) != 32 || AV_RL16(src + 39) != 32) { + av_log(avctx, AV_LOG_WARNING, + "Invalid cursor size. Skipping cursor.\n"); + skip_cursor = 1; + } + /* Slice height for all but the last slice. */ ctx->slice_h = 16 * (ctx->aligned_height >> 4) / nslices; if (ctx->slice_h % 16) @@ -296,9 +386,28 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data, NULL, nslices, sizeof(ctx->slice_data[0]))) < 0) return ret; + av_frame_free(&ctx->final_frame); + ctx->final_frame = av_frame_clone(ctx->frame); + if (!ctx->final_frame) { + av_log(avctx, AV_LOG_ERROR, "Could not clone frame buffer.\n"); + return AVERROR(ENOMEM); + } + + /* Make sure we use a user-supplied buffer. */ + if ((ret = ff_reget_buffer(avctx, ctx->final_frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "Could not make frame writable.\n"); + return ret; + } + + /* Draw cursor. */ + if (!skip_cursor) { + memcpy(ctx->cursor_buf, src + 59, 32 * 32 * 4); + fic_draw_cursor(avctx, cur_x, cur_y); + } + skip: *got_frame = 1; - if ((ret = av_frame_ref(data, ctx->frame)) < 0) + if ((ret = av_frame_ref(data, ctx->final_frame)) < 0) return ret; return avpkt->size; @@ -309,6 +418,7 @@ static av_cold int fic_decode_close(AVCodecContext *avctx) FICContext *ctx = avctx->priv_data; av_freep(&ctx->slice_data); + av_frame_free(&ctx->final_frame); av_frame_free(&ctx->frame); return 0;