loosen vorbis_enc.c dependencies by spliting vorbis.c

Originally committed as revision 8980 to svn://svn.ffmpeg.org/ffmpeg/trunk

3 files changed, 188 insertions, 154 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3bfe37adef..4feef82447 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -170,8 +170,8 @@ OBJS-$(CONFIG_VCR1_ENCODER)            += vcr1.o
 OBJS-$(CONFIG_VMDAUDIO_DECODER)        += vmdav.o
 OBJS-$(CONFIG_VMDVIDEO_DECODER)        += vmdav.o
 OBJS-$(CONFIG_VMNC_DECODER)            += vmnc.o
-OBJS-$(CONFIG_VORBIS_DECODER)          += vorbis.o vorbis_data.o xiph.o
-OBJS-$(CONFIG_VORBIS_ENCODER)          += vorbis_enc.o vorbis.o vorbis_data.o xiph.o
+OBJS-$(CONFIG_VORBIS_DECODER)          += vorbis.o vorbis_common.o vorbis_data.o xiph.o
+OBJS-$(CONFIG_VORBIS_ENCODER)          += vorbis_enc.o vorbis_common.o vorbis_data.o
 OBJS-$(CONFIG_VP3_DECODER)             += vp3.o
 OBJS-$(CONFIG_VP5_DECODER)             += vp5.o vp56.o vp56data.o
 OBJS-$(CONFIG_VP6_DECODER)             += vp6.o vp56.o vp56data.o
diff --git a/libavcodec/vorbis.c b/libavcodec/vorbis.c
index 7e5f0d3492..8623438a77 100644
--- a/libavcodec/vorbis.c
+++ b/libavcodec/vorbis.c
@@ -166,17 +166,6 @@ typedef struct vorbis_context_s {
 #define BARK(x) \
     (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
 
-unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) {   // x^(1/n)
-    unsigned int ret=0, i, j;
-
-    do {
-        ++ret;
-        for(i=0,j=ret;i<n-1;i++) j*=ret;
-    } while (j<=x);
-
-    return (ret-1);
-}
-
 static float vorbisfloat2float(uint_fast32_t val) {
     double mant=val&0x1fffff;
     long exp=(val&0x7fe00000L)>>21;
@@ -185,104 +174,6 @@ static float vorbisfloat2float(uint_fast32_t val) {
 }
 
 
-// Generate vlc codes from vorbis huffman code lengths
-
-int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
-    uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-        0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
-
-    uint_fast8_t i,j;
-    uint_fast32_t code,p;
-
-#ifdef V_DEBUG
-    GetBitContext gb;
-#endif
-
-    for(p=0;(bits[p]==0) && (p<num);++p);
-    if (p==num) {
-//        av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
-        return 0;
-    }
-
-    codes[p]=0;
-    for(i=0;i<bits[p];++i) {
-        exit_at_level[i+1]=1<<i;
-    }
-
-#ifdef V_DEBUG
-    av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
-    init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
-    for(i=0;i<bits[p];++i) {
-        av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
-    }
-    av_log(NULL, AV_LOG_INFO, "\n");
-#endif
-
-    ++p;
-
-    for(;p<num;++p) {
-        if (bits[p]==0) continue;
-        // find corresponding exit(node which the tree can grow further from)
-        for(i=bits[p];i>0;--i) {
-            if (exit_at_level[i]) break;
-        }
-        if (!i) return 1; // overspecified tree
-        code=exit_at_level[i];
-        exit_at_level[i]=0;
-        // construct code (append 0s to end) and introduce new exits
-        for(j=i+1;j<=bits[p];++j) {
-            exit_at_level[j]=code+(1<<(j-1));
-        }
-        codes[p]=code;
-
-#ifdef V_DEBUG
-        av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
-        init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
-        for(i=0;i<bits[p];++i) {
-            av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
-        }
-        av_log(NULL, AV_LOG_INFO, "\n");
-#endif
-
-    }
-
-    //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
-    for (p=1; p<33; p++)
-        if (exit_at_level[p]) return 1;
-
-    return 0;
-}
-
-void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
-    int i;
-    list[0].sort = 0;
-    list[1].sort = 1;
-    for (i = 2; i < values; i++) {
-        int j;
-        list[i].low = 0;
-        list[i].high = 1;
-        list[i].sort = i;
-        for (j = 2; j < i; j++) {
-            int tmp = list[j].x;
-            if (tmp < list[i].x) {
-                if (tmp > list[list[i].low].x) list[i].low = j;
-            } else {
-                if (tmp < list[list[i].high].x) list[i].high = j;
-            }
-        }
-    }
-    for (i = 0; i < values - 1; i++) {
-        int j;
-        for (j = i + 1; j < values; j++) {
-            if (list[list[i].sort].x > list[list[j].sort].x) {
-                int tmp = list[i].sort;
-                list[i].sort = list[j].sort;
-                list[j].sort = tmp;
-            }
-        }
-    }
-}
-
 // Free all allocated memory -----------------------------------------
 
 static void vorbis_free(vorbis_context *vc) {
@@ -1209,49 +1100,6 @@ static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
     return 0;
 }
 
-static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
-    int dy = y1 - y0;
-    int adx = x1 - x0;
-    int ady = FFABS(dy);
-    int base = dy / adx;
-    int x = x0;
-    int y = y0;
-    int err = 0;
-    int sy;
-    if (dy < 0) sy = base - 1;
-    else        sy = base + 1;
-    ady = ady - FFABS(base) * adx;
-    if (x >= n) return;
-    buf[x] = ff_vorbis_floor1_inverse_db_table[y];
-    for (x = x0 + 1; x < x1; x++) {
-        if (x >= n) return;
-        err += ady;
-        if (err >= adx) {
-            err -= adx;
-            y += sy;
-        } else {
-            y += base;
-        }
-        buf[x] = ff_vorbis_floor1_inverse_db_table[y];
-    }
-}
-
-void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
-    int lx, ly, i;
-    lx = 0;
-    ly = y_list[0] * multiplier;
-    for (i = 1; i < values; i++) {
-        int pos = list[i].sort;
-        if (flag[pos]) {
-            render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
-            lx = list[pos].x;
-            ly = y_list[pos] * multiplier;
-        }
-        if (lx >= samples) break;
-    }
-    if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
-}
-
 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
     vorbis_floor1 * vf=&vfu->t1;
     GetBitContext *gb=&vc->gb;
diff --git a/libavcodec/vorbis_common.c b/libavcodec/vorbis_common.c
new file mode 100644
index 0000000000..5b398d834b
--- /dev/null
+++ b/libavcodec/vorbis_common.c
@@ -0,0 +1,186 @@
+/**
+ * @file vorbis_common.c
+ * Common code for Vorbis I encoder and decoder
+ * @author Denes Balatoni  ( dbalatoni programozo hu )
+
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#undef V_DEBUG
+//#define V_DEBUG
+
+#define ALT_BITSTREAM_READER_LE
+#include "avcodec.h"
+#include "bitstream.h"
+
+#include "vorbis.h"
+
+
+/* Helper functions */
+
+unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) {   // x^(1/n)
+    unsigned int ret=0, i, j;
+
+    do {
+        ++ret;
+        for(i=0,j=ret;i<n-1;i++) j*=ret;
+    } while (j<=x);
+
+    return (ret-1);
+}
+
+// Generate vlc codes from vorbis huffman code lengths
+
+int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
+    uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+        0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+
+    uint_fast8_t i,j;
+    uint_fast32_t code,p;
+
+#ifdef V_DEBUG
+    GetBitContext gb;
+#endif
+
+    for(p=0;(bits[p]==0) && (p<num);++p);
+    if (p==num) {
+//        av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
+        return 0;
+    }
+
+    codes[p]=0;
+    for(i=0;i<bits[p];++i) {
+        exit_at_level[i+1]=1<<i;
+    }
+
+#ifdef V_DEBUG
+    av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
+    init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
+    for(i=0;i<bits[p];++i) {
+        av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
+    }
+    av_log(NULL, AV_LOG_INFO, "\n");
+#endif
+
+    ++p;
+
+    for(;p<num;++p) {
+        if (bits[p]==0) continue;
+        // find corresponding exit(node which the tree can grow further from)
+        for(i=bits[p];i>0;--i) {
+            if (exit_at_level[i]) break;
+        }
+        if (!i) return 1; // overspecified tree
+        code=exit_at_level[i];
+        exit_at_level[i]=0;
+        // construct code (append 0s to end) and introduce new exits
+        for(j=i+1;j<=bits[p];++j) {
+            exit_at_level[j]=code+(1<<(j-1));
+        }
+        codes[p]=code;
+
+#ifdef V_DEBUG
+        av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
+        init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
+        for(i=0;i<bits[p];++i) {
+            av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
+        }
+        av_log(NULL, AV_LOG_INFO, "\n");
+#endif
+
+    }
+
+    //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
+    for (p=1; p<33; p++)
+        if (exit_at_level[p]) return 1;
+
+    return 0;
+}
+
+void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
+    int i;
+    list[0].sort = 0;
+    list[1].sort = 1;
+    for (i = 2; i < values; i++) {
+        int j;
+        list[i].low = 0;
+        list[i].high = 1;
+        list[i].sort = i;
+        for (j = 2; j < i; j++) {
+            int tmp = list[j].x;
+            if (tmp < list[i].x) {
+                if (tmp > list[list[i].low].x) list[i].low = j;
+            } else {
+                if (tmp < list[list[i].high].x) list[i].high = j;
+            }
+        }
+    }
+    for (i = 0; i < values - 1; i++) {
+        int j;
+        for (j = i + 1; j < values; j++) {
+            if (list[list[i].sort].x > list[list[j].sort].x) {
+                int tmp = list[i].sort;
+                list[i].sort = list[j].sort;
+                list[j].sort = tmp;
+            }
+        }
+    }
+}
+
+static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
+    int dy = y1 - y0;
+    int adx = x1 - x0;
+    int ady = FFABS(dy);
+    int base = dy / adx;
+    int x = x0;
+    int y = y0;
+    int err = 0;
+    int sy;
+    if (dy < 0) sy = base - 1;
+    else        sy = base + 1;
+    ady = ady - FFABS(base) * adx;
+    if (x >= n) return;
+    buf[x] = ff_vorbis_floor1_inverse_db_table[y];
+    for (x = x0 + 1; x < x1; x++) {
+        if (x >= n) return;
+        err += ady;
+        if (err >= adx) {
+            err -= adx;
+            y += sy;
+        } else {
+            y += base;
+        }
+        buf[x] = ff_vorbis_floor1_inverse_db_table[y];
+    }
+}
+
+void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
+    int lx, ly, i;
+    lx = 0;
+    ly = y_list[0] * multiplier;
+    for (i = 1; i < values; i++) {
+        int pos = list[i].sort;
+        if (flag[pos]) {
+            render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
+            lx = list[pos].x;
+            ly = y_list[pos] * multiplier;
+        }
+        if (lx >= samples) break;
+    }
+    if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
+}