lavc/texturedsp: require explicitly-set frame dimensions

This change decouples the frame dimensions from avctx, which is useful
for DXV decoding, and fixes incorrect behavior in the existing
implementation.

Tested with `make fate THREADS=7` and
`make fate THREADS=7 THREAD_TYPE=slice`.

Signed-off-by: Connor Worley <connorbworley@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavcodec/dds.c

@@ -636,6 +636,8 @@ static int dds_decode(AVCodecContext *avctx, AVFrame *frame,
         ctx->dec.tex_data.in = gbc->buffer;
         ctx->dec.frame_data.out = frame->data[0];
         ctx->dec.stride = frame->linesize[0];
+        ctx->dec.width  = avctx->coded_width;
+        ctx->dec.height = avctx->coded_height;
         ff_texturedsp_exec_decompress_threads(avctx, &ctx->dec);
     } else if (!ctx->paletted && ctx->bpp == 4 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
         uint8_t *dst = frame->data[0];

libavcodec/dxv.c

@@ -843,7 +843,6 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
 {
     DXVContext *ctx = avctx->priv_data;
     GetByteContext *gbc = &ctx->gbc;
-    AVCodecContext cavctx = *avctx;
     TextureDSPThreadContext texdsp_ctx, ctexdsp_ctx;
     int (*decompress_tex)(AVCodecContext *avctx);
     const char *msgcomp, *msgtext;
@@ -854,9 +853,6 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
 
     bytestream2_init(gbc, avpkt->data, avpkt->size);
 
-    cavctx.coded_height = avctx->coded_height / 2;
-    cavctx.coded_width  = avctx->coded_width  / 2;
-
     avctx->pix_fmt = AV_PIX_FMT_RGBA;
     avctx->colorspace = AVCOL_SPC_RGB;
 
@@ -943,7 +939,8 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
     texdsp_ctx.slice_count  = av_clip(avctx->thread_count, 1,
                                       avctx->coded_height / TEXTURE_BLOCK_H);
     ctexdsp_ctx.slice_count = av_clip(avctx->thread_count, 1,
-                                      cavctx.coded_height / TEXTURE_BLOCK_H);
+                                      avctx->coded_height / 2 / TEXTURE_BLOCK_H);
+
     /* New header is 12 bytes long. */
     if (!old_type) {
         version_major = bytestream2_get_byte(gbc) - 1;
@@ -979,8 +976,8 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
     if (avctx->pix_fmt != AV_PIX_FMT_RGBA) {
         int i;
 
-        ctx->ctex_size = cavctx.coded_width  / ctexdsp_ctx.raw_ratio *
+        ctx->ctex_size = avctx->coded_width  / 2 / ctexdsp_ctx.raw_ratio *
-                         cavctx.coded_height / TEXTURE_BLOCK_H *
+                         avctx->coded_height / 2 / TEXTURE_BLOCK_H *
                          ctexdsp_ctx.tex_ratio;
 
         ctx->op_size[0] = avctx->coded_width * avctx->coded_height / 16;
@@ -1007,6 +1004,10 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
     if (ret < 0)
         return ret;
 
+    texdsp_ctx.width   = avctx->coded_width;
+    texdsp_ctx.height  = avctx->coded_height;
+    ctexdsp_ctx.width  = avctx->coded_width  / 2;
+    ctexdsp_ctx.height = avctx->coded_height / 2;
     switch (tag) {
     case DXV_FMT_YG10:
         /* BC5 texture with alpha in the second half of each block */
@@ -1022,13 +1023,13 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame,
         ctexdsp_ctx.tex_data.in    = ctx->ctex_data;
         ctexdsp_ctx.frame_data.out = frame->data[2];
         ctexdsp_ctx.stride         = frame->linesize[2];
-        ret = ff_texturedsp_exec_decompress_threads(&cavctx, &ctexdsp_ctx);
+        ret = ff_texturedsp_exec_decompress_threads(avctx, &ctexdsp_ctx);
         if (ret < 0)
             return ret;
         ctexdsp_ctx.tex_data.in    = ctx->ctex_data + ctexdsp_ctx.tex_ratio / 2;
         ctexdsp_ctx.frame_data.out = frame->data[1];
         ctexdsp_ctx.stride         = frame->linesize[1];
-        ret = ff_texturedsp_exec_decompress_threads(&cavctx, &ctexdsp_ctx);
+        ret = ff_texturedsp_exec_decompress_threads(avctx, &ctexdsp_ctx);
         if (ret < 0)
             return ret;
         /* fallthrough */

libavcodec/dxvenc.c

@@ -233,6 +233,8 @@ static int dxv_encode(AVCodecContext *avctx, AVPacket *pkt,
         ctx->enc.tex_data.out = ctx->tex_data;
         ctx->enc.frame_data.in = frame->data[0];
         ctx->enc.stride = frame->linesize[0];
+        ctx->enc.width  = avctx->width;
+        ctx->enc.height = avctx->height;
         ff_texturedsp_exec_compress_threads(avctx, &ctx->enc);
     } else {
         /* unimplemented: YCoCg formats */

libavcodec/hapdec.c

@@ -323,6 +323,8 @@ static int hap_decode(AVCodecContext *avctx, AVFrame *frame,
 
         ctx->dec[t].frame_data.out = frame->data[0];
         ctx->dec[t].stride = frame->linesize[0];
+        ctx->dec[t].width  = avctx->coded_width;
+        ctx->dec[t].height = avctx->coded_height;
         ff_texturedsp_exec_decompress_threads(avctx, &ctx->dec[t]);
     }
 

libavcodec/hapenc.c

@@ -63,6 +63,8 @@ static int compress_texture(AVCodecContext *avctx, uint8_t *out, int out_length,
     ctx->enc.tex_data.out = out;
     ctx->enc.frame_data.in = f->data[0];
     ctx->enc.stride = f->linesize[0];
+    ctx->enc.width  = avctx->width;
+    ctx->enc.height = avctx->height;
     ff_texturedsp_exec_compress_threads(avctx, &ctx->enc);
 
     return 0;

libavcodec/texturedsp.h

@@ -72,6 +72,7 @@ typedef struct TextureDSPThreadContext {
         uint8_t *out;            // Output frame data
     } frame_data;
     ptrdiff_t stride;            // Frame linesize
+    int width, height;           // Frame width / height
     union {
         const uint8_t *in;       // Compressed texture for decompression
         uint8_t *out;            // Compressed texture of compression

libavcodec/texturedsp_template.c

@@ -27,8 +27,8 @@ static int exec_func(AVCodecContext *avctx, void *arg,
 {
     const TextureDSPThreadContext *ctx = arg;
     uint8_t *d = ctx->tex_data.out;
-    int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
+    int w_block = ctx->width  / TEXTURE_BLOCK_W;
-    int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
+    int h_block = ctx->height / TEXTURE_BLOCK_H;
     int x, y;
     int start_slice, end_slice;
     int base_blocks_per_slice = h_block / ctx->slice_count;

libavcodec/vbndec.c

@@ -162,6 +162,8 @@ static int vbn_decode_frame(AVCodecContext *avctx,
         ctx->dec.raw_ratio = 16;
         ctx->dec.frame_data.out = frame->data[0] + frame->linesize[0] * (frame->height - 1);
         ctx->dec.stride = -frame->linesize[0];
+        ctx->dec.width  = avctx->coded_width;
+        ctx->dec.height = avctx->coded_height;
         ff_texturedsp_exec_decompress_threads(avctx, &ctx->dec);
     }
 

libavcodec/vbnenc.c

@@ -114,6 +114,8 @@ static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt,
         ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0];
         ctx->enc.stride = -frame->linesize[0];
         ctx->enc.tex_data.out = pkt->data + VBN_HEADER_SIZE;
+        ctx->enc.width  = avctx->width;
+        ctx->enc.height = avctx->height;
         ff_texturedsp_exec_compress_threads(avctx, &ctx->enc);
     } else {
         const uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1);