motionpixels: Convert to the new bitstream reader

libavcodec/motionpixels.c

@@ -20,7 +20,7 @@
  */
 
 #include "avcodec.h"
-#include "get_bits.h"
+#include "bitstream.h"
 #include "bswapdsp.h"
 #include "internal.h"
 
@@ -87,17 +87,18 @@ static av_cold int mp_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
+static void mp_read_changes_map(MotionPixelsContext *mp, BitstreamContext *bc,
+                                int count, int bits_len, int read_color)
 {
     uint16_t *pixels;
     int offset, w, h, color = 0, x, y, i;
 
     while (count--) {
-        offset = get_bits_long(gb, mp->offset_bits_len);
-        w      = get_bits(gb, bits_len) + 1;
-        h      = get_bits(gb, bits_len) + 1;
+        offset = bitstream_read(bc, mp->offset_bits_len);
+        w      = bitstream_read(bc, bits_len) + 1;
+        h      = bitstream_read(bc, bits_len) + 1;
         if (read_color)
-            color = get_bits(gb, 15);
+            color = bitstream_read(bc, 15);
         x = offset % mp->avctx->width;
         y = offset / mp->avctx->width;
         if (y >= mp->avctx->height)
@@ -116,16 +117,17 @@ static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int
     }
 }
 
-static void mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size, int code)
+static void mp_get_code(MotionPixelsContext *mp, BitstreamContext *bc,
+                        int size, int code)
 {
-    while (get_bits1(gb)) {
+    while (bitstream_read_bit(bc)) {
         ++size;
         if (size > mp->max_codes_bits) {
             av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
             return;
         }
         code <<= 1;
-        mp_get_code(mp, gb, size, code + 1);
+        mp_get_code(mp, bc, size, code + 1);
     }
     if (mp->current_codes_count >= MAX_HUFF_CODES) {
         av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
@@ -135,18 +137,18 @@ static void mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size, in
     mp->codes[mp->current_codes_count++].size = size;
 }
 
-static void mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
+static void mp_read_codes_table(MotionPixelsContext *mp, BitstreamContext *bc)
 {
     if (mp->codes_count == 1) {
-        mp->codes[0].delta = get_bits(gb, 4);
+        mp->codes[0].delta = bitstream_read(bc, 4);
     } else {
         int i;
 
-        mp->max_codes_bits = get_bits(gb, 4);
+        mp->max_codes_bits = bitstream_read(bc, 4);
         for (i = 0; i < mp->codes_count; ++i)
-            mp->codes[i].delta = get_bits(gb, 4);
+            mp->codes[i].delta = bitstream_read(bc, 4);
         mp->current_codes_count = 0;
-        mp_get_code(mp, gb, 0, 0);
+        mp_get_code(mp, bc, 0, 0);
    }
 }
 
@@ -175,16 +177,16 @@ static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const Yuv
     *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color;
 }
 
-static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
+static int mp_get_vlc(MotionPixelsContext *mp, BitstreamContext *bc)
 {
     int i;
 
-    i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1);
+    i = (mp->codes_count == 1) ? 0 : bitstream_read_vlc(bc, mp->vlc.table, mp->max_codes_bits, 1);
     i = FFMIN(i, FF_ARRAY_ELEMS(mp->codes) - 1);
     return mp->codes[i].delta;
 }
 
-static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
+static void mp_decode_line(MotionPixelsContext *mp, BitstreamContext *bc, int y)
 {
     YuvPixel p;
     const int y0 = y * mp->avctx->width;
@@ -211,13 +213,13 @@ static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
             memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
             p = mp_get_yuv_from_rgb(mp, x - 1, y);
         } else {
-            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
+            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, bc));
             p.y = av_clip_uintp2(p.y, 5);
             if ((x & 3) == 0) {
                 if ((y & 3) == 0) {
-                    p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
+                    p.v += mp_gradient(mp, 1, mp_get_vlc(mp, bc));
                     p.v = av_clip_intp2(p.v, 5);
-                    p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
+                    p.u += mp_gradient(mp, 2, mp_get_vlc(mp, bc));
                     p.u = av_clip_intp2(p.u, 5);
                     mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
                 } else {
@@ -231,7 +233,8 @@ static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
     }
 }
 
-static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
+static void mp_decode_frame_helper(MotionPixelsContext *mp,
+                                   BitstreamContext *bc)
 {
     YuvPixel p;
     int y, y0;
@@ -241,12 +244,12 @@ static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
             memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
             p = mp_get_yuv_from_rgb(mp, 0, y);
         } else {
-            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
+            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, bc));
             p.y = av_clip_uintp2(p.y, 5);
             if ((y & 3) == 0) {
-                p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
+                p.v += mp_gradient(mp, 1, mp_get_vlc(mp, bc));
                 p.v = av_clip_intp2(p.v, 5);
-                p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
+                p.u += mp_gradient(mp, 2, mp_get_vlc(mp, bc));
                 p.u = av_clip_intp2(p.u, 5);
             }
             mp->vpt[y] = p;
@@ -255,7 +258,7 @@ static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
     }
     for (y0 = 0; y0 < 2; ++y0)
         for (y = y0; y < mp->avctx->height; y += 2)
-            mp_decode_line(mp, gb, y);
+            mp_decode_line(mp, bc, y);
 }
 
 static int mp_decode_frame(AVCodecContext *avctx,
@@ -265,7 +268,7 @@ static int mp_decode_frame(AVCodecContext *avctx,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     MotionPixelsContext *mp = avctx->priv_data;
-    GetBitContext gb;
+    BitstreamContext bc;
     int i, count1, count2, sz, ret;
 
     if ((ret = ff_reget_buffer(avctx, mp->frame)) < 0) {
@@ -282,29 +285,29 @@ static int mp_decode_frame(AVCodecContext *avctx,
     if (buf_size & 3)
         memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
     memset(mp->bswapbuf + buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
-    init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
+    bitstream_init(&bc, mp->bswapbuf, buf_size * 8);
 
     memset(mp->changes_map, 0, avctx->width * avctx->height);
     for (i = !(avctx->extradata[1] & 2); i < 2; ++i) {
-        count1 = get_bits(&gb, 12);
-        count2 = get_bits(&gb, 12);
-        mp_read_changes_map(mp, &gb, count1, 8, i);
-        mp_read_changes_map(mp, &gb, count2, 4, i);
+        count1 = bitstream_read(&bc, 12);
+        count2 = bitstream_read(&bc, 12);
+        mp_read_changes_map(mp, &bc, count1, 8, i);
+        mp_read_changes_map(mp, &bc, count2, 4, i);
     }
 
-    mp->codes_count = get_bits(&gb, 4);
+    mp->codes_count = bitstream_read(&bc, 4);
     if (mp->codes_count == 0)
         goto end;
 
     if (mp->changes_map[0] == 0) {
-        *(uint16_t *)mp->frame->data[0] = get_bits(&gb, 15);
+        *(uint16_t *)mp->frame->data[0] = bitstream_read(&bc, 15);
         mp->changes_map[0] = 1;
     }
-    mp_read_codes_table(mp, &gb);
+    mp_read_codes_table(mp, &bc);
 
-    sz = get_bits(&gb, 18);
+    sz = bitstream_read(&bc, 18);
     if (avctx->extradata[0] != 5)
-        sz += get_bits(&gb, 18);
+        sz += bitstream_read(&bc, 18);
     if (sz == 0)
         goto end;
 
@@ -312,7 +315,7 @@ static int mp_decode_frame(AVCodecContext *avctx,
         goto end;
     if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0))
         goto end;
-    mp_decode_frame_helper(mp, &gb);
+    mp_decode_frame_helper(mp, &bc);
     ff_free_vlc(&mp->vlc);
 
 end: