doc/filters: Documentation to add sess_config option for tensorflow backend

[ffmpeg] / libavcodec / rv10.c

diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index 4d4c2b0f2e8fb2b5bda85732b59574b45d2fdf1c..d8261c34c71f202a0c5e8a6f146ed8d3c2f27725 100644 (file)
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -47,7 +47,7 @@
 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
 
 #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries.
-#define DC_VLC_BITS 14 // FIXME find a better solution
+#define DC_VLC_BITS        9
 
 typedef struct RVDecContext {
     MpegEncContext m;
@@ -84,22 +84,11 @@ int ff_rv_decode_dc(MpegEncContext *s, int n)
 
     if (n < 4) {
         code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
-        if (code < 0) {
-            /* Skip entry - no error. */
-            skip_bits(&s->gb, 18);
-            code = 255;
-        }
     } else {
         code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
         if (code < 0) {
-            if (show_bits(&s->gb, 9) == 0x1FE) {
-                /* Skip entry - no error. */
-                skip_bits(&s->gb, 18);
-                code = 255;
-            } else {
-                av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
-                return -1;
-            }
+            av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
+            return -1;
         }
     }
     return code;
@@ -165,7 +154,7 @@ static int rv10_decode_picture_header(MpegEncContext *s)
     return mb_count;
 }
 
-static int rv20_decode_picture_header(RVDecContext *rv)
+static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
 {
     MpegEncContext *s = &rv->m;
     int seq, mb_pos, i, ret;
@@ -237,12 +226,16 @@ static int rv20_decode_picture_header(RVDecContext *rv)
             new_w = rv->orig_width;
             new_h = rv->orig_height;
         }
-        if (new_w != s->width || new_h != s->height) {
+        if (new_w != s->width || new_h != s->height || !s->context_initialized) {
             AVRational old_aspect = s->avctx->sample_aspect_ratio;
             av_log(s->avctx, AV_LOG_DEBUG,
                    "attempting to change resolution to %dx%d\n", new_w, new_h);
             if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
                 return AVERROR_INVALIDDATA;
+
+            if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
+                return AVERROR_INVALIDDATA;
+
             ff_mpv_common_end(s);
 
             // attempt to keep aspect during typical resolution switches
@@ -346,16 +339,27 @@ static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
 
 static av_cold void rv10_init_static(void)
 {
-    static VLC_TYPE table[16896 + 16640][2];
+    static VLC_TYPE table[1472 + 992][2];
 
     rv_dc_lum.table             = table;
-    rv_dc_lum.table_allocated   = 16896;
+    rv_dc_lum.table_allocated   = 1472;
     rv10_build_vlc(&rv_dc_lum, rv_lum_len_count,
                    rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len));
-    rv_dc_chrom.table           = &table[16896];
-    rv_dc_chrom.table_allocated = 16640;
+    for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
+        /* All codes beginning with 0x7F have the same length and value.
+         * Modifying the table directly saves us the useless subtables. */
+        rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][0] = 255;
+        rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][1] = 18;
+    }
+    rv_dc_chrom.table           = &table[1472];
+    rv_dc_chrom.table_allocated = 992;
     rv10_build_vlc(&rv_dc_chrom, rv_chrom_len_count,
                    rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len) - 2);
+    for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
+        /* Same as above. */
+        rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][0] = 255;
+        rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][1] = 18;
+    }
     ff_h263_decode_init_vlc();
 }
 
@@ -374,7 +378,6 @@ static av_cold int rv10_decode_init(AVCodecContext *avctx)
                                    avctx->coded_height, 0, avctx)) < 0)
         return ret;
 
-    ff_mpv_decode_defaults(s);
     ff_mpv_decode_init(s, avctx);
 
     s->out_format  = FMT_H263;
@@ -448,7 +451,7 @@ static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
     if (s->codec_id == AV_CODEC_ID_RV10)
         mb_count = rv10_decode_picture_header(s);
     else
-        mb_count = rv20_decode_picture_header(rv);
+        mb_count = rv20_decode_picture_header(rv, whole_size);
     if (mb_count < 0) {
         if (mb_count != ERROR_SKIP_FRAME)
             av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
@@ -678,7 +681,7 @@ static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     return avpkt->size;
 }
 
-AVCodec ff_rv10_decoder = {
+const AVCodec ff_rv10_decoder = {
     .name           = "rv10",
     .long_name      = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -688,7 +691,6 @@ AVCodec ff_rv10_decoder = {
     .close          = rv10_decode_end,
     .decode         = rv10_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
     .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P,
@@ -696,7 +698,7 @@ AVCodec ff_rv10_decoder = {
     },
 };
 
-AVCodec ff_rv20_decoder = {
+const AVCodec ff_rv20_decoder = {
     .name           = "rv20",
     .long_name      = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -706,7 +708,6 @@ AVCodec ff_rv20_decoder = {
     .close          = rv10_decode_end,
     .decode         = rv10_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
     .flush          = ff_mpeg_flush,
     .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {