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author | Stefano Sabatini <stefasab@gmail.com> | 2011-10-29 00:10:43 +0200 |
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committer | Stefano Sabatini <stefasab@gmail.com> | 2011-10-31 11:06:19 +0100 |
commit | 3013bfa81ef17153a07970a8a5961e350992fdf0 (patch) | |
tree | 6bc8217dacbde37329e3656403ed123d8b0b1231 /libavfilter | |
parent | c0dbab964d0669ad549a289c39fd9852b5f7d136 (diff) | |
download | ffmpeg-3013bfa81ef17153a07970a8a5961e350992fdf0.tar.gz |
vf_overlay: enable RGB path
Add option rgb which forces the RGB path.
Diffstat (limited to 'libavfilter')
-rw-r--r-- | libavfilter/vf_overlay.c | 121 |
1 files changed, 103 insertions, 18 deletions
diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c index 57c9fe9564..db5398551e 100644 --- a/libavfilter/vf_overlay.c +++ b/libavfilter/vf_overlay.c @@ -33,6 +33,7 @@ #include "libavutil/imgutils.h" #include "libavutil/mathematics.h" #include "internal.h" +#include "drawutils.h" static const char *var_names[] = { "main_w", "W", ///< width of the main video @@ -53,13 +54,31 @@ enum var_name { #define MAIN 0 #define OVERLAY 1 +#define R 0 +#define G 1 +#define B 2 +#define A 3 + +#define Y 0 +#define U 1 +#define V 2 + typedef struct { const AVClass *class; int x, y; ///< position of overlayed picture + int allow_packed_rgb; + uint8_t main_is_packed_rgb; + uint8_t main_rgba_map[4]; + uint8_t main_has_alpha; + uint8_t overlay_is_packed_rgb; + uint8_t overlay_rgba_map[4]; + uint8_t overlay_has_alpha; + AVFilterBufferRef *overpicref; - int max_plane_step[4]; ///< steps per pixel for each plane + int main_pix_step[4]; ///< steps per pixel for each plane of the main output + int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay int hsub, vsub; ///< chroma subsampling values char *x_expr, *y_expr; @@ -70,6 +89,7 @@ typedef struct { static const AVOption overlay_options[] = { { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX }, { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX }, + {"rgb", "force packed RGB in input and output", OFFSET(allow_packed_rgb), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {NULL}, }; @@ -128,27 +148,59 @@ static av_cold void uninit(AVFilterContext *ctx) static int query_formats(AVFilterContext *ctx) { - const enum PixelFormat inout_pix_fmts[] = { PIX_FMT_YUV420P, PIX_FMT_NONE }; - const enum PixelFormat blend_pix_fmts[] = { PIX_FMT_YUVA420P, PIX_FMT_NONE }; - AVFilterFormats *inout_formats = avfilter_make_format_list(inout_pix_fmts); - AVFilterFormats *blend_formats = avfilter_make_format_list(blend_pix_fmts); + OverlayContext *over = ctx->priv; - avfilter_formats_ref(inout_formats, &ctx->inputs [MAIN ]->out_formats); - avfilter_formats_ref(blend_formats, &ctx->inputs [OVERLAY]->out_formats); - avfilter_formats_ref(inout_formats, &ctx->outputs[MAIN ]->in_formats ); + /* overlay formats contains alpha, for avoiding conversion with alpha information loss */ + const enum PixelFormat main_pix_fmts_yuv[] = { PIX_FMT_YUV420P, PIX_FMT_NONE }; + const enum PixelFormat overlay_pix_fmts_yuv[] = { PIX_FMT_YUVA420P, PIX_FMT_NONE }; + const enum PixelFormat main_pix_fmts_rgb[] = { + PIX_FMT_ARGB, PIX_FMT_RGBA, + PIX_FMT_ABGR, PIX_FMT_BGRA, + PIX_FMT_RGB24, PIX_FMT_BGR24, + PIX_FMT_NONE + }; + const enum PixelFormat overlay_pix_fmts_rgb[] = { + PIX_FMT_ARGB, PIX_FMT_RGBA, + PIX_FMT_ABGR, PIX_FMT_BGRA, + PIX_FMT_NONE + }; + + AVFilterFormats *main_formats; + AVFilterFormats *overlay_formats; + + if (over->allow_packed_rgb) { + main_formats = avfilter_make_format_list(main_pix_fmts_rgb); + overlay_formats = avfilter_make_format_list(overlay_pix_fmts_rgb); + } else { + main_formats = avfilter_make_format_list(main_pix_fmts_yuv); + overlay_formats = avfilter_make_format_list(overlay_pix_fmts_yuv); + } + + avfilter_formats_ref(main_formats, &ctx->inputs [MAIN ]->out_formats); + avfilter_formats_ref(overlay_formats, &ctx->inputs [OVERLAY]->out_formats); + avfilter_formats_ref(main_formats, &ctx->outputs[MAIN ]->in_formats ); return 0; } +static enum PixelFormat alpha_pix_fmts[] = { + PIX_FMT_YUVA420P, PIX_FMT_ARGB, PIX_FMT_ABGR, PIX_FMT_RGBA, + PIX_FMT_BGRA, PIX_FMT_NONE +}; + static int config_input_main(AVFilterLink *inlink) { OverlayContext *over = inlink->dst->priv; const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format]; - av_image_fill_max_pixsteps(over->max_plane_step, NULL, pix_desc); + av_image_fill_max_pixsteps(over->main_pix_step, NULL, pix_desc); + over->hsub = pix_desc->log2_chroma_w; over->vsub = pix_desc->log2_chroma_h; + over->main_is_packed_rgb = + ff_fill_rgba_map(over->main_rgba_map, inlink->format) >= 0; + over->main_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts); return 0; } @@ -159,6 +211,9 @@ static int config_input_overlay(AVFilterLink *inlink) char *expr; double var_values[VAR_VARS_NB], res; int ret; + const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format]; + + av_image_fill_max_pixsteps(over->overlay_pix_step, NULL, pix_desc); /* Finish the configuration by evaluating the expressions now when both inputs are configured. */ @@ -181,6 +236,10 @@ static int config_input_overlay(AVFilterLink *inlink) goto fail; over->x = res; + over->overlay_is_packed_rgb = + ff_fill_rgba_map(over->overlay_rgba_map, inlink->format) >= 0; + over->overlay_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts); + av_log(ctx, AV_LOG_INFO, "main w:%d h:%d fmt:%s overlay x:%d y:%d w:%d h:%d fmt:%s\n", ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h, @@ -272,6 +331,10 @@ static void start_frame_overlay(AVFilterLink *inlink, AVFilterBufferRef *inpicre ctx->outputs[0]->time_base); } +// divide by 255 and round to nearest +// apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 +#define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) + static void blend_slice(AVFilterContext *ctx, AVFilterBufferRef *dst, AVFilterBufferRef *src, int x, int y, int w, int h, @@ -289,21 +352,43 @@ static void blend_slice(AVFilterContext *ctx, start_y = FFMAX(y, slice_y); height = end_y - start_y; - if (dst->format == PIX_FMT_BGR24 || dst->format == PIX_FMT_RGB24) { - uint8_t *dp = dst->data[0] + x * 3 + start_y * dst->linesize[0]; + if (over->main_is_packed_rgb) { + uint8_t *dp = dst->data[0] + x * over->main_pix_step[0] + + start_y * dst->linesize[0]; uint8_t *sp = src->data[0]; - int b = dst->format == PIX_FMT_BGR24 ? 2 : 0; - int r = dst->format == PIX_FMT_BGR24 ? 0 : 2; + uint8_t alpha; ///< the amount of overlay to blend on to main + const int dr = over->main_rgba_map[R]; + const int dg = over->main_rgba_map[G]; + const int db = over->main_rgba_map[B]; + const int dstep = over->main_pix_step[0]; + const int sr = over->overlay_rgba_map[R]; + const int sg = over->overlay_rgba_map[G]; + const int sb = over->overlay_rgba_map[B]; + const int sa = over->overlay_rgba_map[A]; + const int sstep = over->overlay_pix_step[0]; if (slice_y > y) sp += (slice_y - y) * src->linesize[0]; for (i = 0; i < height; i++) { uint8_t *d = dp, *s = sp; for (j = 0; j < width; j++) { - d[r] = (d[r] * (0xff - s[3]) + s[0] * s[3] + 128) >> 8; - d[1] = (d[1] * (0xff - s[3]) + s[1] * s[3] + 128) >> 8; - d[b] = (d[b] * (0xff - s[3]) + s[2] * s[3] + 128) >> 8; - d += 3; - s += 4; + alpha = s[sa]; + switch (alpha) { + case 0: + break; + case 255: + d[dr] = s[sr]; + d[dg] = s[sg]; + d[db] = s[sb]; + break; + default: + // main_value = main_value * (1 - alpha) + overlay_value * alpha + // since alpha is in the range 0-255, the result must divided by 255 + d[dr] = FAST_DIV255(d[dr] * (255 - alpha) + s[sr] * alpha); + d[dg] = FAST_DIV255(d[dg] * (255 - alpha) + s[sg] * alpha); + d[db] = FAST_DIV255(d[db] * (255 - alpha) + s[sb] * alpha); + } + d += dstep; + s += sstep; } dp += dst->linesize[0]; sp += src->linesize[0]; |