add bitrate helper to choose all dnxhd variants

Originally committed as revision 11260 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dnxhddata.c

@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "avcodec.h"
 #include "dnxhddata.h"
 
 static const uint8_t dnxhd_1237_luma_weight[] = {
@@ -361,49 +362,57 @@ const CIDEntry ff_dnxhd_cid_table[] = {
       dnxhd_1237_dc_codes, dnxhd_1237_dc_bits,
       dnxhd_1237_ac_codes, dnxhd_1237_ac_bits, dnxhd_1237_ac_level,
       dnxhd_1237_ac_run_flag, dnxhd_1237_ac_index_flag,
-      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run },
+      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run,
+      { 115, 120, 145, 240, 290 } },
     { 1238, 1920, 1080, 0, 917504, 917504, 4, 8,
       dnxhd_1238_luma_weight, dnxhd_1238_chroma_weight,
       dnxhd_1238_dc_codes, dnxhd_1238_dc_bits,
       dnxhd_1238_ac_codes, dnxhd_1238_ac_bits, dnxhd_1238_ac_level,
       dnxhd_1238_ac_run_flag, dnxhd_1238_ac_index_flag,
-      dnxhd_1238_run_codes, dnxhd_1238_run_bits, dnxhd_1238_run },
+      dnxhd_1238_run_codes, dnxhd_1238_run_bits, dnxhd_1238_run,
+      { 175, 185, 220, 365, 440 } },
     { 1241, 1920, 1080, 1, 917504, 458752, 6, 10,
       dnxhd_1241_luma_weight, dnxhd_1241_chroma_weight,
       dnxhd_1241_dc_codes, dnxhd_1241_dc_bits,
       dnxhd_1241_ac_codes, dnxhd_1241_ac_bits, dnxhd_1241_ac_level,
       dnxhd_1241_ac_run_flag, dnxhd_1241_ac_index_flag,
-      dnxhd_1241_run_codes, dnxhd_1241_run_bits, dnxhd_1241_run },
+      dnxhd_1241_run_codes, dnxhd_1241_run_bits, dnxhd_1241_run,
+      { 185, 220 } },
     { 1242, 1920, 1080, 1, 606208, 303104, 4, 8,
       dnxhd_1242_luma_weight, dnxhd_1242_chroma_weight,
       dnxhd_1237_dc_codes, dnxhd_1237_dc_bits,
       dnxhd_1237_ac_codes, dnxhd_1237_ac_bits, dnxhd_1237_ac_level,
       dnxhd_1237_ac_run_flag, dnxhd_1237_ac_index_flag,
-      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run },
+      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run,
+      { 120, 145 } },
     { 1243, 1920, 1080, 1, 917504, 458752, 4, 8,
       dnxhd_1243_luma_weight, dnxhd_1243_chroma_weight,
       dnxhd_1238_dc_codes, dnxhd_1238_dc_bits,
       dnxhd_1238_ac_codes, dnxhd_1238_ac_bits, dnxhd_1238_ac_level,
       dnxhd_1238_ac_run_flag, dnxhd_1238_ac_index_flag,
-      dnxhd_1238_run_codes, dnxhd_1238_run_bits, dnxhd_1238_run },
+      dnxhd_1238_run_codes, dnxhd_1238_run_bits, dnxhd_1238_run,
+      { 185, 220 } },
     { 1251, 1280,  720, 0, 458752, 458752, 4, 8,
       dnxhd_1251_luma_weight, dnxhd_1251_chroma_weight,
       dnxhd_1251_dc_codes, dnxhd_1251_dc_bits,
       dnxhd_1251_ac_codes, dnxhd_1251_ac_bits, dnxhd_1251_ac_level,
       dnxhd_1251_ac_run_flag, dnxhd_1251_ac_index_flag,
-      dnxhd_1251_run_codes, dnxhd_1251_run_bits, dnxhd_1251_run },
+      dnxhd_1251_run_codes, dnxhd_1251_run_bits, dnxhd_1251_run,
+      { 90, 110, 175, 220 } },
     { 1252, 1280,  720, 0, 303104, 303104, 4, 8,
       dnxhd_1252_luma_weight, dnxhd_1252_chroma_weight,
       dnxhd_1252_dc_codes, dnxhd_1252_dc_bits,
       dnxhd_1252_ac_codes, dnxhd_1252_ac_bits, dnxhd_1252_ac_level,
       dnxhd_1252_ac_run_flag, dnxhd_1252_ac_index_flag,
-      dnxhd_1252_run_codes, dnxhd_1252_run_bits, dnxhd_1252_run },
+      dnxhd_1252_run_codes, dnxhd_1252_run_bits, dnxhd_1252_run,
+      { 60, 75, 115, 145 } },
     { 1253, 1920, 1080, 0, 188416, 188416, 4, 8,
       dnxhd_1237_luma_weight, dnxhd_1237_chroma_weight,
       dnxhd_1237_dc_codes, dnxhd_1237_dc_bits,
       dnxhd_1237_ac_codes, dnxhd_1237_ac_bits, dnxhd_1237_ac_level,
       dnxhd_1237_ac_run_flag, dnxhd_1237_ac_index_flag,
-      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run },
+      dnxhd_1237_run_codes, dnxhd_1237_run_bits, dnxhd_1237_run,
+      { 36, 45, 75, 90 } },
 };
 
 int ff_dnxhd_get_cid_table(int cid)
@@ -414,3 +423,21 @@ int ff_dnxhd_get_cid_table(int cid)
             return i;
     return -1;
 }
+
+int ff_dnxhd_find_cid(AVCodecContext *avctx)
+{
+    int i, j;
+    int mbs = avctx->bit_rate/1000000;
+    for (i = 0; i < sizeof(ff_dnxhd_cid_table)/sizeof(CIDEntry); i++) {
+        const CIDEntry *cid = &ff_dnxhd_cid_table[i];
+        if (cid->width == avctx->width && cid->height == avctx->height &&
+            cid->interlaced == !!(avctx->flags & CODEC_FLAG_INTERLACED_DCT) &&
+            cid->bit_depth == 8) { // until 10 bit is supported
+            for (j = 0; j < sizeof(cid->bit_rates); j++) {
+                if (cid->bit_rates[j] == mbs)
+                    return cid->cid;
+            }
+        }
+    }
+    return 0;
+}

libavcodec/dnxhddata.h

@@ -23,6 +23,7 @@
 #define FFMPEG_DNXHDDATA_H
 
 #include <stdint.h>
+#include "avcodec.h"
 
 typedef struct {
     int cid;
@@ -39,10 +40,12 @@ typedef struct {
     const uint8_t *ac_run_flag, *ac_index_flag;
     const uint16_t *run_codes;
     const uint8_t *run_bits, *run;
+    int bit_rates[5]; ///< Helpher to choose variants, rounded to nearest 5Mb/s
 } CIDEntry;
 
 extern const CIDEntry ff_dnxhd_cid_table[];
 
 int ff_dnxhd_get_cid_table(int cid);
+int ff_dnxhd_find_cid(AVCodecContext *avctx);
 
 #endif /* FFMPEG_DNXHDDATA_H */

libavcodec/dnxhdenc.c

@@ -171,31 +171,12 @@ static int dnxhd_encode_init(AVCodecContext *avctx)
     DNXHDEncContext *ctx = avctx->priv_data;
     int i, index;
 
-    if (avctx->width == 1920 && avctx->height == 1080) {
+    ctx->cid = ff_dnxhd_find_cid(avctx);
-        if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
-            if      (avctx->bit_rate == 120000000)
-                ctx->cid = 1242;
-            else if (avctx->bit_rate == 185000000)
-                ctx->cid = 1243;
-        } else {
-            if      (avctx->bit_rate == 120000000)
-                ctx->cid = 1237;
-            else if (avctx->bit_rate == 185000000)
-                ctx->cid = 1238;
-            else if (avctx->bit_rate ==  36000000)
-                ctx->cid = 1253;
-        }
-    } else if (avctx->width == 1280 && avctx->height == 720 &&
-               !(avctx->flags & CODEC_FLAG_INTERLACED_DCT)) {
-            if      (avctx->bit_rate ==  90000000)
-                ctx->cid = 1251;
-            else if (avctx->bit_rate ==  60000000)
-                ctx->cid = 1252;
-    }
     if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
         av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
         return -1;
     }
+    av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
 
     index = ff_dnxhd_get_cid_table(ctx->cid);
     ctx->cid_table = &ff_dnxhd_cid_table[index];