mirror of https://git.ffmpeg.org/ffmpeg.git
ffplay: Use sws_scale to scale subtitles
Fixes some files from Ticket679 This also changes subtitles to 4:2:0 matching the output format and thus simplifying the blend code. This restricts placement to the chroma sample resolution though, speak up if you consider this a problem, say so, the code could be changed to use YUV444 for subtitles and scaling them down while blending, this would be slower though. The current code only uses a single swscale context and reinitializes it as needed, this could be changed as well if needed Reviewed-by: Marton Balint <cus@passwd.hu> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
parent
f40ec70478
commit
d64ba25a4d
280
ffplay.c
280
ffplay.c
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@ -223,6 +223,9 @@ typedef struct VideoState {
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Decoder viddec;
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Decoder subdec;
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int viddec_width;
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int viddec_height;
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int audio_stream;
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int av_sync_type;
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@ -278,6 +281,7 @@ typedef struct VideoState {
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#if !CONFIG_AVFILTER
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struct SwsContext *img_convert_ctx;
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#endif
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struct SwsContext *sub_convert_ctx;
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SDL_Rect last_display_rect;
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int eof;
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@ -829,229 +833,50 @@ static void fill_border(int xleft, int ytop, int width, int height, int x, int y
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#define ALPHA_BLEND(a, oldp, newp, s)\
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((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
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#define RGBA_IN(r, g, b, a, s)\
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{\
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unsigned int v = ((const uint32_t *)(s))[0];\
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a = (v >> 24) & 0xff;\
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r = (v >> 16) & 0xff;\
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g = (v >> 8) & 0xff;\
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b = v & 0xff;\
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}
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#define YUVA_IN(y, u, v, a, s, pal)\
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{\
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unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
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a = (val >> 24) & 0xff;\
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y = (val >> 16) & 0xff;\
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u = (val >> 8) & 0xff;\
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v = val & 0xff;\
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}
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#define YUVA_OUT(d, y, u, v, a)\
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{\
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((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
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}
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#define BPP 1
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static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
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{
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int wrap, wrap3, width2, skip2;
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int y, u, v, a, u1, v1, a1, w, h;
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int x, y, Y, U, V, A;
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uint8_t *lum, *cb, *cr;
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const uint8_t *p;
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const uint32_t *pal;
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int dstx, dsty, dstw, dsth;
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const AVPicture *src = &rect->pict;
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dstw = av_clip(rect->w, 0, imgw);
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dsth = av_clip(rect->h, 0, imgh);
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dstx = av_clip(rect->x, 0, imgw - dstw);
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dsty = av_clip(rect->y, 0, imgh - dsth);
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lum = dst->data[0] + dsty * dst->linesize[0];
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cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
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cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
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lum = dst->data[0] + dstx + dsty * dst->linesize[0];
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cb = dst->data[1] + dstx/2 + (dsty >> 1) * dst->linesize[1];
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cr = dst->data[2] + dstx/2 + (dsty >> 1) * dst->linesize[2];
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width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
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skip2 = dstx >> 1;
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wrap = dst->linesize[0];
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wrap3 = rect->pict.linesize[0];
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p = rect->pict.data[0];
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pal = (const uint32_t *)rect->pict.data[1]; /* Now in YCrCb! */
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if (dsty & 1) {
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lum += dstx;
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cb += skip2;
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cr += skip2;
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if (dstx & 1) {
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YUVA_IN(y, u, v, a, p, pal);
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
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cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
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cb++;
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cr++;
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lum++;
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p += BPP;
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}
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for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
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YUVA_IN(y, u, v, a, p, pal);
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u1 = u;
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v1 = v;
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a1 = a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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YUVA_IN(y, u, v, a, p + BPP, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
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cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
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cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
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cb++;
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cr++;
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p += 2 * BPP;
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lum += 2;
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}
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if (w) {
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YUVA_IN(y, u, v, a, p, pal);
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
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cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
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p++;
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for (y = 0; y<dsth; y++) {
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for (x = 0; x<dstw; x++) {
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Y = src->data[0][x + y*src->linesize[0]];
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A = src->data[3][x + y*src->linesize[3]];
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lum[0] = ALPHA_BLEND(A, lum[0], Y, 0);
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lum++;
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}
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p += wrap3 - dstw * BPP;
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lum += wrap - dstw - dstx;
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cb += dst->linesize[1] - width2 - skip2;
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cr += dst->linesize[2] - width2 - skip2;
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lum += dst->linesize[0] - dstw;
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}
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for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
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lum += dstx;
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cb += skip2;
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cr += skip2;
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if (dstx & 1) {
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YUVA_IN(y, u, v, a, p, pal);
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u1 = u;
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v1 = v;
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a1 = a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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p += wrap3;
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lum += wrap;
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YUVA_IN(y, u, v, a, p, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
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cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
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for (y = 0; y<dsth/2; y++) {
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for (x = 0; x<dstw/2; x++) {
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U = src->data[1][x + y*src->linesize[1]];
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V = src->data[2][x + y*src->linesize[2]];
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A = src->data[3][2*x + 2*y *src->linesize[3]]
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+ src->data[3][2*x + 1 + 2*y *src->linesize[3]]
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+ src->data[3][2*x + 1 + (2*y+1)*src->linesize[3]]
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+ src->data[3][2*x + (2*y+1)*src->linesize[3]];
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cb[0] = ALPHA_BLEND(A>>2, cb[0], U, 0);
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cr[0] = ALPHA_BLEND(A>>2, cr[0], V, 0);
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cb++;
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cr++;
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p += -wrap3 + BPP;
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lum += -wrap + 1;
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}
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for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
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YUVA_IN(y, u, v, a, p, pal);
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u1 = u;
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v1 = v;
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a1 = a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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YUVA_IN(y, u, v, a, p + BPP, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
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p += wrap3;
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lum += wrap;
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YUVA_IN(y, u, v, a, p, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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YUVA_IN(y, u, v, a, p + BPP, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
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cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
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cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
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cb++;
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cr++;
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p += -wrap3 + 2 * BPP;
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lum += -wrap + 2;
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}
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if (w) {
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YUVA_IN(y, u, v, a, p, pal);
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u1 = u;
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v1 = v;
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a1 = a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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p += wrap3;
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lum += wrap;
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YUVA_IN(y, u, v, a, p, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
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cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
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cb++;
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cr++;
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p += -wrap3 + BPP;
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lum += -wrap + 1;
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}
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p += wrap3 + (wrap3 - dstw * BPP);
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lum += wrap + (wrap - dstw - dstx);
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cb += dst->linesize[1] - width2 - skip2;
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cr += dst->linesize[2] - width2 - skip2;
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}
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/* handle odd height */
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if (h) {
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lum += dstx;
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cb += skip2;
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cr += skip2;
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if (dstx & 1) {
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YUVA_IN(y, u, v, a, p, pal);
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
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cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
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cb++;
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cr++;
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lum++;
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p += BPP;
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}
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for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
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YUVA_IN(y, u, v, a, p, pal);
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u1 = u;
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v1 = v;
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a1 = a;
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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YUVA_IN(y, u, v, a, p + BPP, pal);
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u1 += u;
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v1 += v;
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a1 += a;
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lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
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cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
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cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
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cb++;
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cr++;
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p += 2 * BPP;
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lum += 2;
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}
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if (w) {
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YUVA_IN(y, u, v, a, p, pal);
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lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
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cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
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cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
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}
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cb += dst->linesize[1] - dstw/2;
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cr += dst->linesize[2] - dstw/2;
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}
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}
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@ -1306,6 +1131,7 @@ static void stream_close(VideoState *is)
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#if !CONFIG_AVFILTER
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sws_freeContext(is->img_convert_ctx);
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#endif
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sws_freeContext(is->sub_convert_ctx);
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av_free(is);
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}
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@ -1893,6 +1719,9 @@ static int get_video_frame(VideoState *is, AVFrame *frame)
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frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
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is->viddec_width = frame->width;
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is->viddec_height = frame->height;
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if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
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if (frame->pts != AV_NOPTS_VALUE) {
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double diff = dpts - get_master_clock(is);
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@ -2328,8 +2157,7 @@ static int subtitle_thread(void *arg)
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Frame *sp;
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int got_subtitle;
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double pts;
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int i, j;
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int r, g, b, y, u, v, a;
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int i;
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for (;;) {
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if (!(sp = frame_queue_peek_writable(&is->subpq)))
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@ -2348,14 +2176,41 @@ static int subtitle_thread(void *arg)
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for (i = 0; i < sp->sub.num_rects; i++)
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{
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for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
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{
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RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
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y = RGB_TO_Y_CCIR(r, g, b);
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u = RGB_TO_U_CCIR(r, g, b, 0);
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v = RGB_TO_V_CCIR(r, g, b, 0);
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YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
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int in_w = sp->sub.rects[i]->w;
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int in_h = sp->sub.rects[i]->h;
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int subw = is->subdec.avctx->width ? is->subdec.avctx->width : is->viddec_width;
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int subh = is->subdec.avctx->height ? is->subdec.avctx->height : is->viddec_height;
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int out_w = is->viddec_width ? in_w * is->viddec_width / subw : in_w;
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int out_h = is->viddec_height ? in_h * is->viddec_height / subh : in_h;
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AVPicture newpic;
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//can not use avpicture_alloc as it is not compatible with avsubtitle_free()
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av_image_fill_linesizes(newpic.linesize, AV_PIX_FMT_YUVA420P, out_w);
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newpic.data[0] = av_malloc(newpic.linesize[0] * out_h);
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newpic.data[3] = av_malloc(newpic.linesize[3] * out_h);
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newpic.data[1] = av_malloc(newpic.linesize[1] * ((out_h+1)/2));
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newpic.data[2] = av_malloc(newpic.linesize[2] * ((out_h+1)/2));
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is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
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in_w, in_h, AV_PIX_FMT_PAL8, out_w, out_h,
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AV_PIX_FMT_YUVA420P, sws_flags, NULL, NULL, NULL);
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if (!is->sub_convert_ctx || !newpic.data[0] || !newpic.data[3] ||
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!newpic.data[1] || !newpic.data[2]
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) {
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av_log(NULL, AV_LOG_FATAL, "Cannot initialize the sub conversion context\n");
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exit(1);
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}
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sws_scale(is->sub_convert_ctx,
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(void*)sp->sub.rects[i]->pict.data, sp->sub.rects[i]->pict.linesize,
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0, in_h, newpic.data, newpic.linesize);
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av_free(sp->sub.rects[i]->pict.data[0]);
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av_free(sp->sub.rects[i]->pict.data[1]);
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sp->sub.rects[i]->pict = newpic;
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sp->sub.rects[i]->w = out_w;
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sp->sub.rects[i]->h = out_h;
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sp->sub.rects[i]->x = sp->sub.rects[i]->x * out_w / in_w;
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sp->sub.rects[i]->y = sp->sub.rects[i]->y * out_h / in_h;
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}
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/* now we can update the picture count */
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@ -2772,6 +2627,9 @@ static int stream_component_open(VideoState *is, int stream_index)
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is->video_stream = stream_index;
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is->video_st = ic->streams[stream_index];
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is->viddec_width = avctx->width;
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is->viddec_height = avctx->height;
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decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
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decoder_start(&is->viddec, video_thread, is);
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is->queue_attachments_req = 1;
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