X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavcodec%2Fflacenc.c;h=122d485631094e50d992702ea6c2e266931e9abb;hb=cc5e9e5ff052fe31aa757de79f2d11fb21df3fba;hp=d87d5d7c21998fb7ce2caa687f81dd4e470b05bf;hpb=23940f1405d4c19df69b1fa77c319e9f114c8ef7;p=ffmpeg

diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c
index d87d5d7c219..122d4856310 100644
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
@@ -1,30 +1,31 @@
-/**
+/*
  * FLAC audio encoder
  * Copyright (c) 2006  Justin Ruggles <justin.ruggles@gmail.com>
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavutil/crc.h"
 #include "libavutil/md5.h"
+#include "libavutil/opt.h"
 #include "avcodec.h"
 #include "get_bits.h"
-#include "dsputil.h"
 #include "golomb.h"
+#include "internal.h"
 #include "lpc.h"
 #include "flac.h"
 #include "flacdata.h"
@@ -44,7 +45,7 @@
 typedef struct CompressionOptions {
     int compression_level;
     int block_time_ms;
-    enum AVLPCType lpc_type;
+    enum FFLPCType lpc_type;
     int lpc_passes;
     int lpc_coeff_precision;
     int min_prediction_order;
@@ -52,6 +53,7 @@ typedef struct CompressionOptions {
     int prediction_order_method;
     int min_partition_order;
     int max_partition_order;
+    int ch_mode;
 } CompressionOptions;
 
 typedef struct RiceContext {
@@ -77,9 +79,11 @@ typedef struct FlacFrame {
     int bs_code[2];
     uint8_t crc8;
     int ch_mode;
+    int verbatim_only;
 } FlacFrame;
 
 typedef struct FlacEncodeContext {
+    AVClass *class;
     PutBitContext pb;
     int channels;
     int samplerate;
@@ -94,12 +98,13 @@ typedef struct FlacEncodeContext {
     FlacFrame frame;
     CompressionOptions options;
     AVCodecContext *avctx;
-    DSPContext dsp;
+    LPCContext lpc_ctx;
     struct AVMD5 *md5ctx;
 } FlacEncodeContext;
 
+
 /**
- * Write streaminfo metadata block to byte array
+ * Write streaminfo metadata block to byte array.
  */
 static void write_streaminfo(FlacEncodeContext *s, uint8_t *header)
 {
@@ -123,9 +128,10 @@ static void write_streaminfo(FlacEncodeContext *s, uint8_t *header)
     memcpy(&header[18], s->md5sum, 16);
 }
 
+
 /**
- * Set blocksize based on samplerate
- * Choose the closest predefined blocksize >= BLOCK_TIME_MS milliseconds
+ * Set blocksize based on samplerate.
+ * Choose the closest predefined blocksize >= BLOCK_TIME_MS milliseconds.
  */
 static int select_blocksize(int samplerate, int block_time_ms)
 {
@@ -135,41 +141,97 @@ static int select_blocksize(int samplerate, int block_time_ms)
 
     assert(samplerate > 0);
     blocksize = ff_flac_blocksize_table[1];
-    target = (samplerate * block_time_ms) / 1000;
-    for(i=0; i<16; i++) {
-        if(target >= ff_flac_blocksize_table[i] && ff_flac_blocksize_table[i] > blocksize) {
+    target    = (samplerate * block_time_ms) / 1000;
+    for (i = 0; i < 16; i++) {
+        if (target >= ff_flac_blocksize_table[i] &&
+            ff_flac_blocksize_table[i] > blocksize) {
             blocksize = ff_flac_blocksize_table[i];
         }
     }
     return blocksize;
 }
 
+
+static av_cold void dprint_compression_options(FlacEncodeContext *s)
+{
+    AVCodecContext     *avctx = s->avctx;
+    CompressionOptions *opt   = &s->options;
+
+    av_log(avctx, AV_LOG_DEBUG, " compression: %d\n", opt->compression_level);
+
+    switch (opt->lpc_type) {
+    case FF_LPC_TYPE_NONE:
+        av_log(avctx, AV_LOG_DEBUG, " lpc type: None\n");
+        break;
+    case FF_LPC_TYPE_FIXED:
+        av_log(avctx, AV_LOG_DEBUG, " lpc type: Fixed pre-defined coefficients\n");
+        break;
+    case FF_LPC_TYPE_LEVINSON:
+        av_log(avctx, AV_LOG_DEBUG, " lpc type: Levinson-Durbin recursion with Welch window\n");
+        break;
+    case FF_LPC_TYPE_CHOLESKY:
+        av_log(avctx, AV_LOG_DEBUG, " lpc type: Cholesky factorization, %d pass%s\n",
+               opt->lpc_passes, opt->lpc_passes == 1 ? "" : "es");
+        break;
+    }
+
+    av_log(avctx, AV_LOG_DEBUG, " prediction order: %d, %d\n",
+           opt->min_prediction_order, opt->max_prediction_order);
+
+    switch (opt->prediction_order_method) {
+    case ORDER_METHOD_EST:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "estimate");
+        break;
+    case ORDER_METHOD_2LEVEL:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "2-level");
+        break;
+    case ORDER_METHOD_4LEVEL:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "4-level");
+        break;
+    case ORDER_METHOD_8LEVEL:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "8-level");
+        break;
+    case ORDER_METHOD_SEARCH:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "full search");
+        break;
+    case ORDER_METHOD_LOG:
+        av_log(avctx, AV_LOG_DEBUG, " order method: %s\n", "log search");
+        break;
+    }
+
+
+    av_log(avctx, AV_LOG_DEBUG, " partition order: %d, %d\n",
+           opt->min_partition_order, opt->max_partition_order);
+
+    av_log(avctx, AV_LOG_DEBUG, " block size: %d\n", avctx->frame_size);
+
+    av_log(avctx, AV_LOG_DEBUG, " lpc precision: %d\n",
+           opt->lpc_coeff_precision);
+}
+
+
 static av_cold int flac_encode_init(AVCodecContext *avctx)
 {
     int freq = avctx->sample_rate;
     int channels = avctx->channels;
     FlacEncodeContext *s = avctx->priv_data;
-    int i, level;
+    int i, level, ret;
     uint8_t *streaminfo;
 
     s->avctx = avctx;
 
-    dsputil_init(&s->dsp, avctx);
-
-    if(avctx->sample_fmt != SAMPLE_FMT_S16) {
+    if (avctx->sample_fmt != AV_SAMPLE_FMT_S16)
         return -1;
-    }
 
-    if(channels < 1 || channels > FLAC_MAX_CHANNELS) {
+    if (channels < 1 || channels > FLAC_MAX_CHANNELS)
         return -1;
-    }
     s->channels = channels;
 
     /* find samplerate in table */
-    if(freq < 1)
+    if (freq < 1)
         return -1;
-    for(i=4; i<12; i++) {
-        if(freq == ff_flac_sample_rate_table[i]) {
+    for (i = 4; i < 12; i++) {
+        if (freq == ff_flac_sample_rate_table[i]) {
             s->samplerate = ff_flac_sample_rate_table[i];
             s->sr_code[0] = i;
             s->sr_code[1] = 0;
@@ -177,14 +239,14 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
         }
     }
     /* if not in table, samplerate is non-standard */
-    if(i == 12) {
-        if(freq % 1000 == 0 && freq < 255000) {
+    if (i == 12) {
+        if (freq % 1000 == 0 && freq < 255000) {
             s->sr_code[0] = 12;
             s->sr_code[1] = freq / 1000;
-        } else if(freq % 10 == 0 && freq < 655350) {
+        } else if (freq % 10 == 0 && freq < 655350) {
             s->sr_code[0] = 14;
             s->sr_code[1] = freq / 10;
-        } else if(freq < 65535) {
+        } else if (freq < 65535) {
             s->sr_code[0] = 13;
             s->sr_code[1] = freq;
         } else {
@@ -194,105 +256,69 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
     }
 
     /* set compression option defaults based on avctx->compression_level */
-    if(avctx->compression_level < 0) {
+    if (avctx->compression_level < 0)
         s->options.compression_level = 5;
-    } else {
+    else
         s->options.compression_level = avctx->compression_level;
-    }
-    av_log(avctx, AV_LOG_DEBUG, " compression: %d\n", s->options.compression_level);
 
-    level= s->options.compression_level;
-    if(level > 12) {
+    level = s->options.compression_level;
+    if (level > 12) {
         av_log(avctx, AV_LOG_ERROR, "invalid compression level: %d\n",
                s->options.compression_level);
         return -1;
     }
 
-    s->options.block_time_ms       = ((int[]){ 27, 27, 27,105,105,105,105,105,105,105,105,105,105})[level];
-    s->options.lpc_type            = ((int[]){ AV_LPC_TYPE_FIXED,    AV_LPC_TYPE_FIXED,    AV_LPC_TYPE_FIXED,
-                                               AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON,
-                                               AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON,
-                                               AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON, AV_LPC_TYPE_LEVINSON,
-                                               AV_LPC_TYPE_LEVINSON})[level];
-    s->options.min_prediction_order= ((int[]){  2,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1})[level];
-    s->options.max_prediction_order= ((int[]){  3,  4,  4,  6,  8,  8,  8,  8, 12, 12, 12, 32, 32})[level];
-    s->options.prediction_order_method = ((int[]){ ORDER_METHOD_EST,    ORDER_METHOD_EST,    ORDER_METHOD_EST,
-                                                   ORDER_METHOD_EST,    ORDER_METHOD_EST,    ORDER_METHOD_EST,
-                                                   ORDER_METHOD_4LEVEL, ORDER_METHOD_LOG,    ORDER_METHOD_4LEVEL,
-                                                   ORDER_METHOD_LOG,    ORDER_METHOD_SEARCH, ORDER_METHOD_LOG,
-                                                   ORDER_METHOD_SEARCH})[level];
-    s->options.min_partition_order = ((int[]){  2,  2,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0})[level];
-    s->options.max_partition_order = ((int[]){  2,  2,  3,  3,  3,  8,  8,  8,  8,  8,  8,  8,  8})[level];
-
-    /* set compression option overrides from AVCodecContext */
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    /* for compatibility with deprecated AVCodecContext.use_lpc */
-    if (avctx->use_lpc == 0) {
-        s->options.lpc_type = AV_LPC_TYPE_FIXED;
-    } else if (avctx->use_lpc == 1) {
-        s->options.lpc_type = AV_LPC_TYPE_LEVINSON;
-    } else if (avctx->use_lpc > 1) {
-        s->options.lpc_type   = AV_LPC_TYPE_CHOLESKY;
-        s->options.lpc_passes = avctx->use_lpc - 1;
-    }
-#endif
-    if (avctx->lpc_type > AV_LPC_TYPE_DEFAULT) {
-        if (avctx->lpc_type > AV_LPC_TYPE_CHOLESKY) {
-            av_log(avctx, AV_LOG_ERROR, "unknown lpc type: %d\n", avctx->lpc_type);
-            return -1;
-        }
-        s->options.lpc_type = avctx->lpc_type;
-        if (s->options.lpc_type == AV_LPC_TYPE_CHOLESKY) {
-            if (avctx->lpc_passes < 0) {
-                // default number of passes for Cholesky
-                s->options.lpc_passes = 2;
-            } else if (avctx->lpc_passes == 0) {
-                av_log(avctx, AV_LOG_ERROR, "invalid number of lpc passes: %d\n",
-                       avctx->lpc_passes);
-                return -1;
-            } else {
-                s->options.lpc_passes = avctx->lpc_passes;
-            }
-        }
-    }
-    switch (s->options.lpc_type) {
-    case AV_LPC_TYPE_NONE:
-        av_log(avctx, AV_LOG_DEBUG, " lpc type: None\n");
-        break;
-    case AV_LPC_TYPE_FIXED:
-        av_log(avctx, AV_LOG_DEBUG, " lpc type: Fixed pre-defined coefficients\n");
-        break;
-    case AV_LPC_TYPE_LEVINSON:
-        av_log(avctx, AV_LOG_DEBUG, " lpc type: Levinson-Durbin recursion with Welch window\n");
-        break;
-    case AV_LPC_TYPE_CHOLESKY:
-        av_log(avctx, AV_LOG_DEBUG, " lpc type: Cholesky factorization, %d pass%s\n",
-               s->options.lpc_passes, s->options.lpc_passes==1?"":"es");
-        break;
+    s->options.block_time_ms = ((int[]){ 27, 27, 27,105,105,105,105,105,105,105,105,105,105})[level];
+
+    if (s->options.lpc_type == FF_LPC_TYPE_DEFAULT)
+        s->options.lpc_type  = ((int[]){ FF_LPC_TYPE_FIXED,    FF_LPC_TYPE_FIXED,    FF_LPC_TYPE_FIXED,
+                                         FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON,
+                                         FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON,
+                                         FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON, FF_LPC_TYPE_LEVINSON,
+                                         FF_LPC_TYPE_LEVINSON})[level];
+
+    s->options.min_prediction_order = ((int[]){  2,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1})[level];
+    s->options.max_prediction_order = ((int[]){  3,  4,  4,  6,  8,  8,  8,  8, 12, 12, 12, 32, 32})[level];
+
+    if (s->options.prediction_order_method < 0)
+        s->options.prediction_order_method = ((int[]){ ORDER_METHOD_EST,    ORDER_METHOD_EST,    ORDER_METHOD_EST,
+                                                       ORDER_METHOD_EST,    ORDER_METHOD_EST,    ORDER_METHOD_EST,
+                                                       ORDER_METHOD_4LEVEL, ORDER_METHOD_LOG,    ORDER_METHOD_4LEVEL,
+                                                       ORDER_METHOD_LOG,    ORDER_METHOD_SEARCH, ORDER_METHOD_LOG,
+                                                       ORDER_METHOD_SEARCH})[level];
+
+    if (s->options.min_partition_order > s->options.max_partition_order) {
+        av_log(avctx, AV_LOG_ERROR, "invalid partition orders: min=%d max=%d\n",
+               s->options.min_partition_order, s->options.max_partition_order);
+        return AVERROR(EINVAL);
     }
+    if (s->options.min_partition_order < 0)
+        s->options.min_partition_order = ((int[]){  2,  2,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0})[level];
+    if (s->options.max_partition_order < 0)
+        s->options.max_partition_order = ((int[]){  2,  2,  3,  3,  3,  8,  8,  8,  8,  8,  8,  8,  8})[level];
 
-    if (s->options.lpc_type == AV_LPC_TYPE_NONE) {
+    if (s->options.lpc_type == FF_LPC_TYPE_NONE) {
         s->options.min_prediction_order = 0;
     } else if (avctx->min_prediction_order >= 0) {
-        if (s->options.lpc_type == AV_LPC_TYPE_FIXED) {
-            if(avctx->min_prediction_order > MAX_FIXED_ORDER) {
+        if (s->options.lpc_type == FF_LPC_TYPE_FIXED) {
+            if (avctx->min_prediction_order > MAX_FIXED_ORDER) {
                 av_log(avctx, AV_LOG_ERROR, "invalid min prediction order: %d\n",
                        avctx->min_prediction_order);
                 return -1;
             }
-        } else if(avctx->min_prediction_order < MIN_LPC_ORDER ||
-                  avctx->min_prediction_order > MAX_LPC_ORDER) {
+        } else if (avctx->min_prediction_order < MIN_LPC_ORDER ||
+                   avctx->min_prediction_order > MAX_LPC_ORDER) {
             av_log(avctx, AV_LOG_ERROR, "invalid min prediction order: %d\n",
                    avctx->min_prediction_order);
             return -1;
         }
         s->options.min_prediction_order = avctx->min_prediction_order;
     }
-    if (s->options.lpc_type == AV_LPC_TYPE_NONE) {
+    if (s->options.lpc_type == FF_LPC_TYPE_NONE) {
         s->options.max_prediction_order = 0;
     } else if (avctx->max_prediction_order >= 0) {
-        if (s->options.lpc_type == AV_LPC_TYPE_FIXED) {
-            if(avctx->max_prediction_order > MAX_FIXED_ORDER) {
+        if (s->options.lpc_type == FF_LPC_TYPE_FIXED) {
+            if (avctx->max_prediction_order > MAX_FIXED_ORDER) {
                 av_log(avctx, AV_LOG_ERROR, "invalid max prediction order: %d\n",
                        avctx->max_prediction_order);
                 return -1;
@@ -305,63 +331,14 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
         }
         s->options.max_prediction_order = avctx->max_prediction_order;
     }
-    if(s->options.max_prediction_order < s->options.min_prediction_order) {
+    if (s->options.max_prediction_order < s->options.min_prediction_order) {
         av_log(avctx, AV_LOG_ERROR, "invalid prediction orders: min=%d max=%d\n",
                s->options.min_prediction_order, s->options.max_prediction_order);
         return -1;
     }
-    av_log(avctx, AV_LOG_DEBUG, " prediction order: %d, %d\n",
-           s->options.min_prediction_order, s->options.max_prediction_order);
-
-    if(avctx->prediction_order_method >= 0) {
-        if(avctx->prediction_order_method > ORDER_METHOD_LOG) {
-            av_log(avctx, AV_LOG_ERROR, "invalid prediction order method: %d\n",
-                   avctx->prediction_order_method);
-            return -1;
-        }
-        s->options.prediction_order_method = avctx->prediction_order_method;
-    }
-    switch(s->options.prediction_order_method) {
-        case ORDER_METHOD_EST:    av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "estimate"); break;
-        case ORDER_METHOD_2LEVEL: av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "2-level"); break;
-        case ORDER_METHOD_4LEVEL: av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "4-level"); break;
-        case ORDER_METHOD_8LEVEL: av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "8-level"); break;
-        case ORDER_METHOD_SEARCH: av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "full search"); break;
-        case ORDER_METHOD_LOG:    av_log(avctx, AV_LOG_DEBUG, " order method: %s\n",
-                                         "log search"); break;
-    }
-
-    if(avctx->min_partition_order >= 0) {
-        if(avctx->min_partition_order > MAX_PARTITION_ORDER) {
-            av_log(avctx, AV_LOG_ERROR, "invalid min partition order: %d\n",
-                   avctx->min_partition_order);
-            return -1;
-        }
-        s->options.min_partition_order = avctx->min_partition_order;
-    }
-    if(avctx->max_partition_order >= 0) {
-        if(avctx->max_partition_order > MAX_PARTITION_ORDER) {
-            av_log(avctx, AV_LOG_ERROR, "invalid max partition order: %d\n",
-                   avctx->max_partition_order);
-            return -1;
-        }
-        s->options.max_partition_order = avctx->max_partition_order;
-    }
-    if(s->options.max_partition_order < s->options.min_partition_order) {
-        av_log(avctx, AV_LOG_ERROR, "invalid partition orders: min=%d max=%d\n",
-               s->options.min_partition_order, s->options.max_partition_order);
-        return -1;
-    }
-    av_log(avctx, AV_LOG_DEBUG, " partition order: %d, %d\n",
-           s->options.min_partition_order, s->options.max_partition_order);
 
-    if(avctx->frame_size > 0) {
-        if(avctx->frame_size < FLAC_MIN_BLOCKSIZE ||
+    if (avctx->frame_size > 0) {
+        if (avctx->frame_size < FLAC_MIN_BLOCKSIZE ||
                 avctx->frame_size > FLAC_MAX_BLOCKSIZE) {
             av_log(avctx, AV_LOG_ERROR, "invalid block size: %d\n",
                    avctx->frame_size);
@@ -371,22 +348,6 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
         s->avctx->frame_size = select_blocksize(s->samplerate, s->options.block_time_ms);
     }
     s->max_blocksize = s->avctx->frame_size;
-    av_log(avctx, AV_LOG_DEBUG, " block size: %d\n", s->avctx->frame_size);
-
-    /* set LPC precision */
-    if(avctx->lpc_coeff_precision > 0) {
-        if(avctx->lpc_coeff_precision > MAX_LPC_PRECISION) {
-            av_log(avctx, AV_LOG_ERROR, "invalid lpc coeff precision: %d\n",
-                   avctx->lpc_coeff_precision);
-            return -1;
-        }
-        s->options.lpc_coeff_precision = avctx->lpc_coeff_precision;
-    } else {
-        /* default LPC precision */
-        s->options.lpc_coeff_precision = 15;
-    }
-    av_log(avctx, AV_LOG_DEBUG, " lpc precision: %d\n",
-           s->options.lpc_coeff_precision);
 
     /* set maximum encoded frame size in verbatim mode */
     s->max_framesize = ff_flac_get_max_frame_size(s->avctx->frame_size,
@@ -394,42 +355,53 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
 
     /* initialize MD5 context */
     s->md5ctx = av_malloc(av_md5_size);
-    if(!s->md5ctx)
+    if (!s->md5ctx)
         return AVERROR(ENOMEM);
     av_md5_init(s->md5ctx);
 
     streaminfo = av_malloc(FLAC_STREAMINFO_SIZE);
+    if (!streaminfo)
+        return AVERROR(ENOMEM);
     write_streaminfo(s, streaminfo);
     avctx->extradata = streaminfo;
     avctx->extradata_size = FLAC_STREAMINFO_SIZE;
 
-    s->frame_count = 0;
+    s->frame_count   = 0;
     s->min_framesize = s->max_framesize;
 
+#if FF_API_OLD_ENCODE_AUDIO
     avctx->coded_frame = avcodec_alloc_frame();
-    avctx->coded_frame->key_frame = 1;
+    if (!avctx->coded_frame)
+        return AVERROR(ENOMEM);
+#endif
 
-    return 0;
+    ret = ff_lpc_init(&s->lpc_ctx, avctx->frame_size,
+                      s->options.max_prediction_order, FF_LPC_TYPE_LEVINSON);
+
+    dprint_compression_options(s);
+
+    return ret;
 }
 
-static void init_frame(FlacEncodeContext *s)
+
+static void init_frame(FlacEncodeContext *s, int nb_samples)
 {
     int i, ch;
     FlacFrame *frame;
 
     frame = &s->frame;
 
-    for(i=0; i<16; i++) {
-        if(s->avctx->frame_size == ff_flac_blocksize_table[i]) {
-            frame->blocksize = ff_flac_blocksize_table[i];
+    for (i = 0; i < 16; i++) {
+        if (nb_samples == ff_flac_blocksize_table[i]) {
+            frame->blocksize  = ff_flac_blocksize_table[i];
             frame->bs_code[0] = i;
             frame->bs_code[1] = 0;
             break;
         }
     }
-    if(i == 16) {
-        frame->blocksize = s->avctx->frame_size;
-        if(frame->blocksize <= 256) {
+    if (i == 16) {
+        frame->blocksize = nb_samples;
+        if (frame->blocksize <= 256) {
             frame->bs_code[0] = 6;
             frame->bs_code[1] = frame->blocksize-1;
         } else {
@@ -438,45 +410,107 @@ static void init_frame(FlacEncodeContext *s)
         }
     }
 
-    for(ch=0; ch<s->channels; ch++) {
+    for (ch = 0; ch < s->channels; ch++)
         frame->subframes[ch].obits = 16;
-    }
+
+    frame->verbatim_only = 0;
 }
 
+
 /**
- * Copy channel-interleaved input samples into separate subframes
+ * Copy channel-interleaved input samples into separate subframes.
  */
-static void copy_samples(FlacEncodeContext *s, int16_t *samples)
+static void copy_samples(FlacEncodeContext *s, const int16_t *samples)
 {
     int i, j, ch;
     FlacFrame *frame;
 
     frame = &s->frame;
-    for(i=0,j=0; i<frame->blocksize; i++) {
-        for(ch=0; ch<s->channels; ch++,j++) {
+    for (i = 0, j = 0; i < frame->blocksize; i++)
+        for (ch = 0; ch < s->channels; ch++, j++)
             frame->subframes[ch].samples[i] = samples[j];
+}
+
+
+static int rice_count_exact(int32_t *res, int n, int k)
+{
+    int i;
+    int count = 0;
+
+    for (i = 0; i < n; i++) {
+        int32_t v = -2 * res[i] - 1;
+        v ^= v >> 31;
+        count += (v >> k) + 1 + k;
+    }
+    return count;
+}
+
+
+static int subframe_count_exact(FlacEncodeContext *s, FlacSubframe *sub,
+                                int pred_order)
+{
+    int p, porder, psize;
+    int i, part_end;
+    int count = 0;
+
+    /* subframe header */
+    count += 8;
+
+    /* subframe */
+    if (sub->type == FLAC_SUBFRAME_CONSTANT) {
+        count += sub->obits;
+    } else if (sub->type == FLAC_SUBFRAME_VERBATIM) {
+        count += s->frame.blocksize * sub->obits;
+    } else {
+        /* warm-up samples */
+        count += pred_order * sub->obits;
+
+        /* LPC coefficients */
+        if (sub->type == FLAC_SUBFRAME_LPC)
+            count += 4 + 5 + pred_order * s->options.lpc_coeff_precision;
+
+        /* rice-encoded block */
+        count += 2;
+
+        /* partition order */
+        porder = sub->rc.porder;
+        psize  = s->frame.blocksize >> porder;
+        count += 4;
+
+        /* residual */
+        i        = pred_order;
+        part_end = psize;
+        for (p = 0; p < 1 << porder; p++) {
+            int k = sub->rc.params[p];
+            count += 4;
+            count += rice_count_exact(&sub->residual[i], part_end - i, k);
+            i = part_end;
+            part_end = FFMIN(s->frame.blocksize, part_end + psize);
         }
     }
+
+    return count;
 }
 
 
 #define rice_encode_count(sum, n, k) (((n)*((k)+1))+((sum-(n>>1))>>(k)))
 
 /**
- * Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0
+ * Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0.
  */
 static int find_optimal_param(uint32_t sum, int n)
 {
     int k;
     uint32_t sum2;
 
-    if(sum <= n>>1)
+    if (sum <= n >> 1)
         return 0;
-    sum2 = sum-(n>>1);
-    k = av_log2(n<256 ? FASTDIV(sum2,n) : sum2/n);
+    sum2 = sum - (n >> 1);
+    k    = av_log2(n < 256 ? FASTDIV(sum2, n) : sum2 / n);
     return FFMIN(k, MAX_RICE_PARAM);
 }
 
+
 static uint32_t calc_optimal_rice_params(RiceContext *rc, int porder,
                                          uint32_t *sums, int n, int pred_order)
 {
@@ -484,11 +518,11 @@ static uint32_t calc_optimal_rice_params(RiceContext *rc, int porder,
     int k, cnt, part;
     uint32_t all_bits;
 
-    part = (1 << porder);
+    part     = (1 << porder);
     all_bits = 4 * part;
 
     cnt = (n >> porder) - pred_order;
-    for(i=0; i<part; i++) {
+    for (i = 0; i < part; i++) {
         k = find_optimal_param(sums[i], cnt);
         rc->params[i] = k;
         all_bits += rice_encode_count(sums[i], cnt, k);
@@ -500,6 +534,7 @@ static uint32_t calc_optimal_rice_params(RiceContext *rc, int porder,
     return all_bits;
 }
 
+
 static void calc_sums(int pmin, int pmax, uint32_t *data, int n, int pred_order,
                       uint32_t sums[][MAX_PARTITIONS])
 {
@@ -508,26 +543,25 @@ static void calc_sums(int pmin, int pmax, uint32_t *data, int n, int pred_order,
     uint32_t *res, *res_end;
 
     /* sums for highest level */
-    parts = (1 << pmax);
-    res = &data[pred_order];
+    parts   = (1 << pmax);
+    res     = &data[pred_order];
     res_end = &data[n >> pmax];
-    for(i=0; i<parts; i++) {
+    for (i = 0; i < parts; i++) {
         uint32_t sum = 0;
-        while(res < res_end){
+        while (res < res_end)
             sum += *(res++);
-        }
         sums[pmax][i] = sum;
-        res_end+= n >> pmax;
+        res_end += n >> pmax;
     }
     /* sums for lower levels */
-    for(i=pmax-1; i>=pmin; i--) {
+    for (i = pmax - 1; i >= pmin; i--) {
         parts = (1 << i);
-        for(j=0; j<parts; j++) {
+        for (j = 0; j < parts; j++)
             sums[i][j] = sums[i+1][2*j] + sums[i+1][2*j+1];
-        }
     }
 }
 
+
 static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax,
                                  int32_t *data, int n, int pred_order)
 {
@@ -543,19 +577,18 @@ static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax,
     assert(pmin <= pmax);
 
     udata = av_malloc(n * sizeof(uint32_t));
-    for(i=0; i<n; i++) {
+    for (i = 0; i < n; i++)
         udata[i] = (2*data[i]) ^ (data[i]>>31);
-    }
 
     calc_sums(pmin, pmax, udata, n, pred_order, sums);
 
     opt_porder = pmin;
     bits[pmin] = UINT32_MAX;
-    for(i=pmin; i<=pmax; i++) {
+    for (i = pmin; i <= pmax; i++) {
         bits[i] = calc_optimal_rice_params(&tmp_rc, i, sums[i], n, pred_order);
-        if(bits[i] <= bits[opt_porder]) {
+        if (bits[i] <= bits[opt_porder]) {
             opt_porder = i;
-            *rc= tmp_rc;
+            *rc = tmp_rc;
         }
     }
 
@@ -563,155 +596,144 @@ static uint32_t calc_rice_params(RiceContext *rc, int pmin, int pmax,
     return bits[opt_porder];
 }
 
+
 static int get_max_p_order(int max_porder, int n, int order)
 {
     int porder = FFMIN(max_porder, av_log2(n^(n-1)));
-    if(order > 0)
+    if (order > 0)
         porder = FFMIN(porder, av_log2(n/order));
     return porder;
 }
 
-static uint32_t calc_rice_params_fixed(RiceContext *rc, int pmin, int pmax,
-                                       int32_t *data, int n, int pred_order,
-                                       int bps)
-{
-    uint32_t bits;
-    pmin = get_max_p_order(pmin, n, pred_order);
-    pmax = get_max_p_order(pmax, n, pred_order);
-    bits = pred_order*bps + 6;
-    bits += calc_rice_params(rc, pmin, pmax, data, n, pred_order);
-    return bits;
-}
 
-static uint32_t calc_rice_params_lpc(RiceContext *rc, int pmin, int pmax,
-                                     int32_t *data, int n, int pred_order,
-                                     int bps, int precision)
+static uint32_t find_subframe_rice_params(FlacEncodeContext *s,
+                                          FlacSubframe *sub, int pred_order)
 {
-    uint32_t bits;
-    pmin = get_max_p_order(pmin, n, pred_order);
-    pmax = get_max_p_order(pmax, n, pred_order);
-    bits = pred_order*bps + 4 + 5 + pred_order*precision + 6;
-    bits += calc_rice_params(rc, pmin, pmax, data, n, pred_order);
+    int pmin = get_max_p_order(s->options.min_partition_order,
+                               s->frame.blocksize, pred_order);
+    int pmax = get_max_p_order(s->options.max_partition_order,
+                               s->frame.blocksize, pred_order);
+
+    uint32_t bits = 8 + pred_order * sub->obits + 2 + 4;
+    if (sub->type == FLAC_SUBFRAME_LPC)
+        bits += 4 + 5 + pred_order * s->options.lpc_coeff_precision;
+    bits += calc_rice_params(&sub->rc, pmin, pmax, sub->residual,
+                             s->frame.blocksize, pred_order);
     return bits;
 }
 
-static void encode_residual_verbatim(int32_t *res, int32_t *smp, int n)
-{
-    assert(n > 0);
-    memcpy(res, smp, n * sizeof(int32_t));
-}
 
 static void encode_residual_fixed(int32_t *res, const int32_t *smp, int n,
                                   int order)
 {
     int i;
 
-    for(i=0; i<order; i++) {
+    for (i = 0; i < order; i++)
         res[i] = smp[i];
-    }
 
-    if(order==0){
-        for(i=order; i<n; i++)
-            res[i]= smp[i];
-    }else if(order==1){
-        for(i=order; i<n; i++)
-            res[i]= smp[i] - smp[i-1];
-    }else if(order==2){
+    if (order == 0) {
+        for (i = order; i < n; i++)
+            res[i] = smp[i];
+    } else if (order == 1) {
+        for (i = order; i < n; i++)
+            res[i] = smp[i] - smp[i-1];
+    } else if (order == 2) {
         int a = smp[order-1] - smp[order-2];
-        for(i=order; i<n; i+=2) {
-            int b = smp[i] - smp[i-1];
-            res[i]= b - a;
-            a = smp[i+1] - smp[i];
-            res[i+1]= a - b;
+        for (i = order; i < n; i += 2) {
+            int b    = smp[i  ] - smp[i-1];
+            res[i]   = b - a;
+            a        = smp[i+1] - smp[i  ];
+            res[i+1] = a - b;
         }
-    }else if(order==3){
-        int a = smp[order-1] - smp[order-2];
+    } else if (order == 3) {
+        int a = smp[order-1] -   smp[order-2];
         int c = smp[order-1] - 2*smp[order-2] + smp[order-3];
-        for(i=order; i<n; i+=2) {
-            int b = smp[i] - smp[i-1];
-            int d = b - a;
-            res[i]= d - c;
-            a = smp[i+1] - smp[i];
-            c = a - b;
-            res[i+1]= c - d;
+        for (i = order; i < n; i += 2) {
+            int b    = smp[i  ] - smp[i-1];
+            int d    = b - a;
+            res[i]   = d - c;
+            a        = smp[i+1] - smp[i  ];
+            c        = a - b;
+            res[i+1] = c - d;
         }
-    }else{
-        int a = smp[order-1] - smp[order-2];
-        int c = smp[order-1] - 2*smp[order-2] + smp[order-3];
+    } else {
+        int a = smp[order-1] -   smp[order-2];
+        int c = smp[order-1] - 2*smp[order-2] +   smp[order-3];
         int e = smp[order-1] - 3*smp[order-2] + 3*smp[order-3] - smp[order-4];
-        for(i=order; i<n; i+=2) {
-            int b = smp[i] - smp[i-1];
-            int d = b - a;
-            int f = d - c;
-            res[i]= f - e;
-            a = smp[i+1] - smp[i];
-            c = a - b;
-            e = c - d;
-            res[i+1]= e - f;
+        for (i = order; i < n; i += 2) {
+            int b    = smp[i  ] - smp[i-1];
+            int d    = b - a;
+            int f    = d - c;
+            res[i  ] = f - e;
+            a        = smp[i+1] - smp[i  ];
+            c        = a - b;
+            e        = c - d;
+            res[i+1] = e - f;
         }
     }
 }
 
+
 #define LPC1(x) {\
     int c = coefs[(x)-1];\
-    p0 += c*s;\
-    s = smp[i-(x)+1];\
-    p1 += c*s;\
+    p0   += c * s;\
+    s     = smp[i-(x)+1];\
+    p1   += c * s;\
 }
 
-static av_always_inline void encode_residual_lpc_unrolled(
-    int32_t *res, const int32_t *smp, int n,
-    int order, const int32_t *coefs, int shift, int big)
+static av_always_inline void encode_residual_lpc_unrolled(int32_t *res,
+                                    const int32_t *smp, int n, int order,
+                                    const int32_t *coefs, int shift, int big)
 {
     int i;
-    for(i=order; i<n; i+=2) {
-        int s = smp[i-order];
+    for (i = order; i < n; i += 2) {
+        int s  = smp[i-order];
         int p0 = 0, p1 = 0;
-        if(big) {
-            switch(order) {
-                case 32: LPC1(32)
-                case 31: LPC1(31)
-                case 30: LPC1(30)
-                case 29: LPC1(29)
-                case 28: LPC1(28)
-                case 27: LPC1(27)
-                case 26: LPC1(26)
-                case 25: LPC1(25)
-                case 24: LPC1(24)
-                case 23: LPC1(23)
-                case 22: LPC1(22)
-                case 21: LPC1(21)
-                case 20: LPC1(20)
-                case 19: LPC1(19)
-                case 18: LPC1(18)
-                case 17: LPC1(17)
-                case 16: LPC1(16)
-                case 15: LPC1(15)
-                case 14: LPC1(14)
-                case 13: LPC1(13)
-                case 12: LPC1(12)
-                case 11: LPC1(11)
-                case 10: LPC1(10)
-                case  9: LPC1( 9)
-                         LPC1( 8)
-                         LPC1( 7)
-                         LPC1( 6)
-                         LPC1( 5)
-                         LPC1( 4)
-                         LPC1( 3)
-                         LPC1( 2)
-                         LPC1( 1)
+        if (big) {
+            switch (order) {
+            case 32: LPC1(32)
+            case 31: LPC1(31)
+            case 30: LPC1(30)
+            case 29: LPC1(29)
+            case 28: LPC1(28)
+            case 27: LPC1(27)
+            case 26: LPC1(26)
+            case 25: LPC1(25)
+            case 24: LPC1(24)
+            case 23: LPC1(23)
+            case 22: LPC1(22)
+            case 21: LPC1(21)
+            case 20: LPC1(20)
+            case 19: LPC1(19)
+            case 18: LPC1(18)
+            case 17: LPC1(17)
+            case 16: LPC1(16)
+            case 15: LPC1(15)
+            case 14: LPC1(14)
+            case 13: LPC1(13)
+            case 12: LPC1(12)
+            case 11: LPC1(11)
+            case 10: LPC1(10)
+            case  9: LPC1( 9)
+                     LPC1( 8)
+                     LPC1( 7)
+                     LPC1( 6)
+                     LPC1( 5)
+                     LPC1( 4)
+                     LPC1( 3)
+                     LPC1( 2)
+                     LPC1( 1)
             }
         } else {
-            switch(order) {
-                case  8: LPC1( 8)
-                case  7: LPC1( 7)
-                case  6: LPC1( 6)
-                case  5: LPC1( 5)
-                case  4: LPC1( 4)
-                case  3: LPC1( 3)
-                case  2: LPC1( 2)
-                case  1: LPC1( 1)
+            switch (order) {
+            case  8: LPC1( 8)
+            case  7: LPC1( 7)
+            case  6: LPC1( 6)
+            case  5: LPC1( 5)
+            case  4: LPC1( 4)
+            case  3: LPC1( 3)
+            case  2: LPC1( 2)
+            case  1: LPC1( 1)
             }
         }
         res[i  ] = smp[i  ] - (p0 >> shift);
@@ -719,213 +741,231 @@ static av_always_inline void encode_residual_lpc_unrolled(
     }
 }
 
+
 static void encode_residual_lpc(int32_t *res, const int32_t *smp, int n,
                                 int order, const int32_t *coefs, int shift)
 {
     int i;
-    for(i=0; i<order; i++) {
+    for (i = 0; i < order; i++)
         res[i] = smp[i];
-    }
 #if CONFIG_SMALL
-    for(i=order; i<n; i+=2) {
+    for (i = order; i < n; i += 2) {
         int j;
-        int s = smp[i];
+        int s  = smp[i];
         int p0 = 0, p1 = 0;
-        for(j=0; j<order; j++) {
+        for (j = 0; j < order; j++) {
             int c = coefs[j];
-            p1 += c*s;
-            s = smp[i-j-1];
-            p0 += c*s;
+            p1   += c * s;
+            s     = smp[i-j-1];
+            p0   += c * s;
         }
         res[i  ] = smp[i  ] - (p0 >> shift);
         res[i+1] = smp[i+1] - (p1 >> shift);
     }
 #else
-    switch(order) {
-        case  1: encode_residual_lpc_unrolled(res, smp, n, 1, coefs, shift, 0); break;
-        case  2: encode_residual_lpc_unrolled(res, smp, n, 2, coefs, shift, 0); break;
-        case  3: encode_residual_lpc_unrolled(res, smp, n, 3, coefs, shift, 0); break;
-        case  4: encode_residual_lpc_unrolled(res, smp, n, 4, coefs, shift, 0); break;
-        case  5: encode_residual_lpc_unrolled(res, smp, n, 5, coefs, shift, 0); break;
-        case  6: encode_residual_lpc_unrolled(res, smp, n, 6, coefs, shift, 0); break;
-        case  7: encode_residual_lpc_unrolled(res, smp, n, 7, coefs, shift, 0); break;
-        case  8: encode_residual_lpc_unrolled(res, smp, n, 8, coefs, shift, 0); break;
-        default: encode_residual_lpc_unrolled(res, smp, n, order, coefs, shift, 1); break;
+    switch (order) {
+    case  1: encode_residual_lpc_unrolled(res, smp, n, 1, coefs, shift, 0); break;
+    case  2: encode_residual_lpc_unrolled(res, smp, n, 2, coefs, shift, 0); break;
+    case  3: encode_residual_lpc_unrolled(res, smp, n, 3, coefs, shift, 0); break;
+    case  4: encode_residual_lpc_unrolled(res, smp, n, 4, coefs, shift, 0); break;
+    case  5: encode_residual_lpc_unrolled(res, smp, n, 5, coefs, shift, 0); break;
+    case  6: encode_residual_lpc_unrolled(res, smp, n, 6, coefs, shift, 0); break;
+    case  7: encode_residual_lpc_unrolled(res, smp, n, 7, coefs, shift, 0); break;
+    case  8: encode_residual_lpc_unrolled(res, smp, n, 8, coefs, shift, 0); break;
+    default: encode_residual_lpc_unrolled(res, smp, n, order, coefs, shift, 1); break;
     }
 #endif
 }
 
-static int encode_residual(FlacEncodeContext *ctx, int ch)
+
+static int encode_residual_ch(FlacEncodeContext *s, int ch)
 {
     int i, n;
-    int min_order, max_order, opt_order, precision, omethod;
-    int min_porder, max_porder;
+    int min_order, max_order, opt_order, omethod;
     FlacFrame *frame;
     FlacSubframe *sub;
     int32_t coefs[MAX_LPC_ORDER][MAX_LPC_ORDER];
     int shift[MAX_LPC_ORDER];
     int32_t *res, *smp;
 
-    frame = &ctx->frame;
-    sub = &frame->subframes[ch];
-    res = sub->residual;
-    smp = sub->samples;
-    n = frame->blocksize;
+    frame = &s->frame;
+    sub   = &frame->subframes[ch];
+    res   = sub->residual;
+    smp   = sub->samples;
+    n     = frame->blocksize;
 
     /* CONSTANT */
-    for(i=1; i<n; i++) {
-        if(smp[i] != smp[0]) break;
-    }
-    if(i == n) {
+    for (i = 1; i < n; i++)
+        if(smp[i] != smp[0])
+            break;
+    if (i == n) {
         sub->type = sub->type_code = FLAC_SUBFRAME_CONSTANT;
         res[0] = smp[0];
-        return sub->obits;
+        return subframe_count_exact(s, sub, 0);
     }
 
     /* VERBATIM */
-    if(n < 5) {
+    if (frame->verbatim_only || n < 5) {
         sub->type = sub->type_code = FLAC_SUBFRAME_VERBATIM;
-        encode_residual_verbatim(res, smp, n);
-        return sub->obits * n;
+        memcpy(res, smp, n * sizeof(int32_t));
+        return subframe_count_exact(s, sub, 0);
     }
 
-    min_order = ctx->options.min_prediction_order;
-    max_order = ctx->options.max_prediction_order;
-    min_porder = ctx->options.min_partition_order;
-    max_porder = ctx->options.max_partition_order;
-    precision = ctx->options.lpc_coeff_precision;
-    omethod = ctx->options.prediction_order_method;
+    min_order  = s->options.min_prediction_order;
+    max_order  = s->options.max_prediction_order;
+    omethod    = s->options.prediction_order_method;
 
     /* FIXED */
-    if (ctx->options.lpc_type == AV_LPC_TYPE_NONE  ||
-        ctx->options.lpc_type == AV_LPC_TYPE_FIXED || n <= max_order) {
+    sub->type = FLAC_SUBFRAME_FIXED;
+    if (s->options.lpc_type == FF_LPC_TYPE_NONE  ||
+        s->options.lpc_type == FF_LPC_TYPE_FIXED || n <= max_order) {
         uint32_t bits[MAX_FIXED_ORDER+1];
-        if(max_order > MAX_FIXED_ORDER) max_order = MAX_FIXED_ORDER;
+        if (max_order > MAX_FIXED_ORDER)
+            max_order = MAX_FIXED_ORDER;
         opt_order = 0;
-        bits[0] = UINT32_MAX;
-        for(i=min_order; i<=max_order; i++) {
+        bits[0]   = UINT32_MAX;
+        for (i = min_order; i <= max_order; i++) {
             encode_residual_fixed(res, smp, n, i);
-            bits[i] = calc_rice_params_fixed(&sub->rc, min_porder, max_porder, res,
-                                             n, i, sub->obits);
-            if(bits[i] < bits[opt_order]) {
+            bits[i] = find_subframe_rice_params(s, sub, i);
+            if (bits[i] < bits[opt_order])
                 opt_order = i;
-            }
         }
-        sub->order = opt_order;
-        sub->type = FLAC_SUBFRAME_FIXED;
+        sub->order     = opt_order;
         sub->type_code = sub->type | sub->order;
-        if(sub->order != max_order) {
+        if (sub->order != max_order) {
             encode_residual_fixed(res, smp, n, sub->order);
-            return calc_rice_params_fixed(&sub->rc, min_porder, max_porder, res, n,
-                                          sub->order, sub->obits);
+            find_subframe_rice_params(s, sub, sub->order);
         }
-        return bits[sub->order];
+        return subframe_count_exact(s, sub, sub->order);
     }
 
     /* LPC */
-    opt_order = ff_lpc_calc_coefs(&ctx->dsp, smp, n, min_order, max_order,
-                                  precision, coefs, shift, ctx->options.lpc_type,
-                                  ctx->options.lpc_passes, omethod,
+    sub->type = FLAC_SUBFRAME_LPC;
+    opt_order = ff_lpc_calc_coefs(&s->lpc_ctx, smp, n, min_order, max_order,
+                                  s->options.lpc_coeff_precision, coefs, shift, s->options.lpc_type,
+                                  s->options.lpc_passes, omethod,
                                   MAX_LPC_SHIFT, 0);
 
-    if(omethod == ORDER_METHOD_2LEVEL ||
-       omethod == ORDER_METHOD_4LEVEL ||
-       omethod == ORDER_METHOD_8LEVEL) {
+    if (omethod == ORDER_METHOD_2LEVEL ||
+        omethod == ORDER_METHOD_4LEVEL ||
+        omethod == ORDER_METHOD_8LEVEL) {
         int levels = 1 << omethod;
         uint32_t bits[1 << ORDER_METHOD_8LEVEL];
         int order;
-        int opt_index = levels-1;
-        opt_order = max_order-1;
+        int opt_index   = levels-1;
+        opt_order       = max_order-1;
         bits[opt_index] = UINT32_MAX;
-        for(i=levels-1; i>=0; i--) {
+        for (i = levels-1; i >= 0; i--) {
             order = min_order + (((max_order-min_order+1) * (i+1)) / levels)-1;
-            if(order < 0) order = 0;
+            if (order < 0)
+                order = 0;
             encode_residual_lpc(res, smp, n, order+1, coefs[order], shift[order]);
-            bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder,
-                                           res, n, order+1, sub->obits, precision);
-            if(bits[i] < bits[opt_index]) {
+            bits[i] = find_subframe_rice_params(s, sub, order+1);
+            if (bits[i] < bits[opt_index]) {
                 opt_index = i;
                 opt_order = order;
             }
         }
         opt_order++;
-    } else if(omethod == ORDER_METHOD_SEARCH) {
+    } else if (omethod == ORDER_METHOD_SEARCH) {
         // brute-force optimal order search
         uint32_t bits[MAX_LPC_ORDER];
         opt_order = 0;
-        bits[0] = UINT32_MAX;
-        for(i=min_order-1; i<max_order; i++) {
+        bits[0]   = UINT32_MAX;
+        for (i = min_order-1; i < max_order; i++) {
             encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]);
-            bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder,
-                                           res, n, i+1, sub->obits, precision);
-            if(bits[i] < bits[opt_order]) {
+            bits[i] = find_subframe_rice_params(s, sub, i+1);
+            if (bits[i] < bits[opt_order])
                 opt_order = i;
-            }
         }
         opt_order++;
-    } else if(omethod == ORDER_METHOD_LOG) {
+    } else if (omethod == ORDER_METHOD_LOG) {
         uint32_t bits[MAX_LPC_ORDER];
         int step;
 
-        opt_order= min_order - 1 + (max_order-min_order)/3;
+        opt_order = min_order - 1 + (max_order-min_order)/3;
         memset(bits, -1, sizeof(bits));
 
-        for(step=16 ;step; step>>=1){
-            int last= opt_order;
-            for(i=last-step; i<=last+step; i+= step){
-                if(i<min_order-1 || i>=max_order || bits[i] < UINT32_MAX)
+        for (step = 16; step; step >>= 1) {
+            int last = opt_order;
+            for (i = last-step; i <= last+step; i += step) {
+                if (i < min_order-1 || i >= max_order || bits[i] < UINT32_MAX)
                     continue;
                 encode_residual_lpc(res, smp, n, i+1, coefs[i], shift[i]);
-                bits[i] = calc_rice_params_lpc(&sub->rc, min_porder, max_porder,
-                                            res, n, i+1, sub->obits, precision);
-                if(bits[i] < bits[opt_order])
-                    opt_order= i;
+                bits[i] = find_subframe_rice_params(s, sub, i+1);
+                if (bits[i] < bits[opt_order])
+                    opt_order = i;
             }
         }
         opt_order++;
     }
 
-    sub->order = opt_order;
-    sub->type = FLAC_SUBFRAME_LPC;
+    sub->order     = opt_order;
     sub->type_code = sub->type | (sub->order-1);
-    sub->shift = shift[sub->order-1];
-    for(i=0; i<sub->order; i++) {
+    sub->shift     = shift[sub->order-1];
+    for (i = 0; i < sub->order; i++)
         sub->coefs[i] = coefs[sub->order-1][i];
-    }
+
     encode_residual_lpc(res, smp, n, sub->order, sub->coefs, sub->shift);
-    return calc_rice_params_lpc(&sub->rc, min_porder, max_porder, res, n, sub->order,
-                                sub->obits, precision);
+
+    find_subframe_rice_params(s, sub, sub->order);
+
+    return subframe_count_exact(s, sub, sub->order);
 }
 
-static int encode_residual_v(FlacEncodeContext *ctx, int ch)
+
+static int count_frame_header(FlacEncodeContext *s)
 {
-    int i, n;
-    FlacFrame *frame;
-    FlacSubframe *sub;
-    int32_t *res, *smp;
+    uint8_t av_unused tmp;
+    int count;
+
+    /*
+    <14> Sync code
+    <1>  Reserved
+    <1>  Blocking strategy
+    <4>  Block size in inter-channel samples
+    <4>  Sample rate
+    <4>  Channel assignment
+    <3>  Sample size in bits
+    <1>  Reserved
+    */
+    count = 32;
+
+    /* coded frame number */
+    PUT_UTF8(s->frame_count, tmp, count += 8;)
+
+    /* explicit block size */
+    if (s->frame.bs_code[0] == 6)
+        count += 8;
+    else if (s->frame.bs_code[0] == 7)
+        count += 16;
+
+    /* explicit sample rate */
+    count += ((s->sr_code[0] == 12) + (s->sr_code[0] > 12)) * 8;
+
+    /* frame header CRC-8 */
+    count += 8;
+
+    return count;
+}
 
-    frame = &ctx->frame;
-    sub = &frame->subframes[ch];
-    res = sub->residual;
-    smp = sub->samples;
-    n = frame->blocksize;
 
-    /* CONSTANT */
-    for(i=1; i<n; i++) {
-        if(smp[i] != smp[0]) break;
-    }
-    if(i == n) {
-        sub->type = sub->type_code = FLAC_SUBFRAME_CONSTANT;
-        res[0] = smp[0];
-        return sub->obits;
-    }
+static int encode_frame(FlacEncodeContext *s)
+{
+    int ch, count;
 
-    /* VERBATIM */
-    sub->type = sub->type_code = FLAC_SUBFRAME_VERBATIM;
-    encode_residual_verbatim(res, smp, n);
-    return sub->obits * n;
+    count = count_frame_header(s);
+
+    for (ch = 0; ch < s->channels; ch++)
+        count += encode_residual_ch(s, ch);
+
+    count += (8 - (count & 7)) & 7; // byte alignment
+    count += 16;                    // CRC-16
+
+    return count >> 3;
 }
 
+
 static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n)
 {
     int i, best;
@@ -936,8 +976,8 @@ static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n)
 
     /* calculate sum of 2nd order residual for each channel */
     sum[0] = sum[1] = sum[2] = sum[3] = 0;
-    for(i=2; i<n; i++) {
-        lt = left_ch[i] - 2*left_ch[i-1] + left_ch[i-2];
+    for (i = 2; i < n; i++) {
+        lt = left_ch[i]  - 2*left_ch[i-1]  + left_ch[i-2];
         rt = right_ch[i] - 2*right_ch[i-1] + right_ch[i-2];
         sum[2] += FFABS((lt + rt) >> 1);
         sum[3] += FFABS(lt - rt);
@@ -945,9 +985,9 @@ static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n)
         sum[1] += FFABS(rt);
     }
     /* estimate bit counts */
-    for(i=0; i<4; i++) {
-        k = find_optimal_param(2*sum[i], n);
-        sum[i] = rice_encode_count(2*sum[i], n, k);
+    for (i = 0; i < 4; i++) {
+        k      = find_optimal_param(2 * sum[i], n);
+        sum[i] = rice_encode_count( 2 * sum[i], n, k);
     }
 
     /* calculate score for each mode */
@@ -958,75 +998,69 @@ static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n)
 
     /* return mode with lowest score */
     best = 0;
-    for(i=1; i<4; i++) {
-        if(score[i] < score[best]) {
+    for (i = 1; i < 4; i++)
+        if (score[i] < score[best])
             best = i;
-        }
-    }
-    if(best == 0) {
-        return FLAC_CHMODE_INDEPENDENT;
-    } else if(best == 1) {
-        return FLAC_CHMODE_LEFT_SIDE;
-    } else if(best == 2) {
-        return FLAC_CHMODE_RIGHT_SIDE;
-    } else {
-        return FLAC_CHMODE_MID_SIDE;
-    }
+
+    return best;
 }
 
+
 /**
- * Perform stereo channel decorrelation
+ * Perform stereo channel decorrelation.
  */
-static void channel_decorrelation(FlacEncodeContext *ctx)
+static void channel_decorrelation(FlacEncodeContext *s)
 {
     FlacFrame *frame;
     int32_t *left, *right;
     int i, n;
 
-    frame = &ctx->frame;
-    n = frame->blocksize;
+    frame = &s->frame;
+    n     = frame->blocksize;
     left  = frame->subframes[0].samples;
     right = frame->subframes[1].samples;
 
-    if(ctx->channels != 2) {
+    if (s->channels != 2) {
         frame->ch_mode = FLAC_CHMODE_INDEPENDENT;
         return;
     }
 
-    frame->ch_mode = estimate_stereo_mode(left, right, n);
+    if (s->options.ch_mode < 0)
+        frame->ch_mode = estimate_stereo_mode(left, right, n);
+    else
+        frame->ch_mode = s->options.ch_mode;
 
     /* perform decorrelation and adjust bits-per-sample */
-    if(frame->ch_mode == FLAC_CHMODE_INDEPENDENT) {
+    if (frame->ch_mode == FLAC_CHMODE_INDEPENDENT)
         return;
-    }
-    if(frame->ch_mode == FLAC_CHMODE_MID_SIDE) {
+    if (frame->ch_mode == FLAC_CHMODE_MID_SIDE) {
         int32_t tmp;
-        for(i=0; i<n; i++) {
-            tmp = left[i];
-            left[i] = (tmp + right[i]) >> 1;
-            right[i] = tmp - right[i];
+        for (i = 0; i < n; i++) {
+            tmp      = left[i];
+            left[i]  = (tmp + right[i]) >> 1;
+            right[i] =  tmp - right[i];
         }
         frame->subframes[1].obits++;
-    } else if(frame->ch_mode == FLAC_CHMODE_LEFT_SIDE) {
-        for(i=0; i<n; i++) {
+    } else if (frame->ch_mode == FLAC_CHMODE_LEFT_SIDE) {
+        for (i = 0; i < n; i++)
             right[i] = left[i] - right[i];
-        }
         frame->subframes[1].obits++;
     } else {
-        for(i=0; i<n; i++) {
+        for (i = 0; i < n; i++)
             left[i] -= right[i];
-        }
         frame->subframes[0].obits++;
     }
 }
 
+
 static void write_utf8(PutBitContext *pb, uint32_t val)
 {
     uint8_t tmp;
     PUT_UTF8(val, tmp, put_bits(pb, 8, tmp);)
 }
 
-static void output_frame_header(FlacEncodeContext *s)
+
+static void write_frame_header(FlacEncodeContext *s)
 {
     FlacFrame *frame;
     int crc;
@@ -1036,145 +1070,43 @@ static void output_frame_header(FlacEncodeContext *s)
     put_bits(&s->pb, 16, 0xFFF8);
     put_bits(&s->pb, 4, frame->bs_code[0]);
     put_bits(&s->pb, 4, s->sr_code[0]);
-    if(frame->ch_mode == FLAC_CHMODE_INDEPENDENT) {
+
+    if (frame->ch_mode == FLAC_CHMODE_INDEPENDENT)
         put_bits(&s->pb, 4, s->channels-1);
-    } else {
-        put_bits(&s->pb, 4, frame->ch_mode);
-    }
+    else
+        put_bits(&s->pb, 4, frame->ch_mode + FLAC_MAX_CHANNELS - 1);
+
     put_bits(&s->pb, 3, 4); /* bits-per-sample code */
     put_bits(&s->pb, 1, 0);
     write_utf8(&s->pb, s->frame_count);
-    if(frame->bs_code[0] == 6) {
+
+    if (frame->bs_code[0] == 6)
         put_bits(&s->pb, 8, frame->bs_code[1]);
-    } else if(frame->bs_code[0] == 7) {
+    else if (frame->bs_code[0] == 7)
         put_bits(&s->pb, 16, frame->bs_code[1]);
-    }
-    if(s->sr_code[0] == 12) {
+
+    if (s->sr_code[0] == 12)
         put_bits(&s->pb, 8, s->sr_code[1]);
-    } else if(s->sr_code[0] > 12) {
+    else if (s->sr_code[0] > 12)
         put_bits(&s->pb, 16, s->sr_code[1]);
-    }
+
     flush_put_bits(&s->pb);
-    crc = av_crc(av_crc_get_table(AV_CRC_8_ATM), 0,
-                 s->pb.buf, put_bits_count(&s->pb)>>3);
+    crc = av_crc(av_crc_get_table(AV_CRC_8_ATM), 0, s->pb.buf,
+                 put_bits_count(&s->pb) >> 3);
     put_bits(&s->pb, 8, crc);
 }
 
-static void output_subframe_constant(FlacEncodeContext *s, int ch)
-{
-    FlacSubframe *sub;
-    int32_t res;
-
-    sub = &s->frame.subframes[ch];
-    res = sub->residual[0];
-    put_sbits(&s->pb, sub->obits, res);
-}
-
-static void output_subframe_verbatim(FlacEncodeContext *s, int ch)
-{
-    int i;
-    FlacFrame *frame;
-    FlacSubframe *sub;
-    int32_t res;
-
-    frame = &s->frame;
-    sub = &frame->subframes[ch];
-
-    for(i=0; i<frame->blocksize; i++) {
-        res = sub->residual[i];
-        put_sbits(&s->pb, sub->obits, res);
-    }
-}
-
-static void output_residual(FlacEncodeContext *ctx, int ch)
-{
-    int i, j, p, n, parts;
-    int k, porder, psize, res_cnt;
-    FlacFrame *frame;
-    FlacSubframe *sub;
-    int32_t *res;
-
-    frame = &ctx->frame;
-    sub = &frame->subframes[ch];
-    res = sub->residual;
-    n = frame->blocksize;
-
-    /* rice-encoded block */
-    put_bits(&ctx->pb, 2, 0);
-
-    /* partition order */
-    porder = sub->rc.porder;
-    psize = n >> porder;
-    parts = (1 << porder);
-    put_bits(&ctx->pb, 4, porder);
-    res_cnt = psize - sub->order;
-
-    /* residual */
-    j = sub->order;
-    for(p=0; p<parts; p++) {
-        k = sub->rc.params[p];
-        put_bits(&ctx->pb, 4, k);
-        if(p == 1) res_cnt = psize;
-        for(i=0; i<res_cnt && j<n; i++, j++) {
-            set_sr_golomb_flac(&ctx->pb, res[j], k, INT32_MAX, 0);
-        }
-    }
-}
-
-static void output_subframe_fixed(FlacEncodeContext *ctx, int ch)
-{
-    int i;
-    FlacFrame *frame;
-    FlacSubframe *sub;
-
-    frame = &ctx->frame;
-    sub = &frame->subframes[ch];
-
-    /* warm-up samples */
-    for(i=0; i<sub->order; i++) {
-        put_sbits(&ctx->pb, sub->obits, sub->residual[i]);
-    }
-
-    /* residual */
-    output_residual(ctx, ch);
-}
-
-static void output_subframe_lpc(FlacEncodeContext *ctx, int ch)
-{
-    int i, cbits;
-    FlacFrame *frame;
-    FlacSubframe *sub;
-
-    frame = &ctx->frame;
-    sub = &frame->subframes[ch];
 
-    /* warm-up samples */
-    for(i=0; i<sub->order; i++) {
-        put_sbits(&ctx->pb, sub->obits, sub->residual[i]);
-    }
-
-    /* LPC coefficients */
-    cbits = ctx->options.lpc_coeff_precision;
-    put_bits(&ctx->pb, 4, cbits-1);
-    put_sbits(&ctx->pb, 5, sub->shift);
-    for(i=0; i<sub->order; i++) {
-        put_sbits(&ctx->pb, cbits, sub->coefs[i]);
-    }
-
-    /* residual */
-    output_residual(ctx, ch);
-}
-
-static void output_subframes(FlacEncodeContext *s)
+static void write_subframes(FlacEncodeContext *s)
 {
-    FlacFrame *frame;
-    FlacSubframe *sub;
     int ch;
 
-    frame = &s->frame;
-
-    for(ch=0; ch<s->channels; ch++) {
-        sub = &frame->subframes[ch];
+    for (ch = 0; ch < s->channels; ch++) {
+        FlacSubframe *sub = &s->frame.subframes[ch];
+        int i, p, porder, psize;
+        int32_t *part_end;
+        int32_t *res       =  sub->residual;
+        int32_t *frame_end = &sub->residual[s->frame.blocksize];
 
         /* subframe header */
         put_bits(&s->pb, 1, 0);
@@ -1182,130 +1114,204 @@ static void output_subframes(FlacEncodeContext *s)
         put_bits(&s->pb, 1, 0); /* no wasted bits */
 
         /* subframe */
-        if(sub->type == FLAC_SUBFRAME_CONSTANT) {
-            output_subframe_constant(s, ch);
-        } else if(sub->type == FLAC_SUBFRAME_VERBATIM) {
-            output_subframe_verbatim(s, ch);
-        } else if(sub->type == FLAC_SUBFRAME_FIXED) {
-            output_subframe_fixed(s, ch);
-        } else if(sub->type == FLAC_SUBFRAME_LPC) {
-            output_subframe_lpc(s, ch);
+        if (sub->type == FLAC_SUBFRAME_CONSTANT) {
+            put_sbits(&s->pb, sub->obits, res[0]);
+        } else if (sub->type == FLAC_SUBFRAME_VERBATIM) {
+            while (res < frame_end)
+                put_sbits(&s->pb, sub->obits, *res++);
+        } else {
+            /* warm-up samples */
+            for (i = 0; i < sub->order; i++)
+                put_sbits(&s->pb, sub->obits, *res++);
+
+            /* LPC coefficients */
+            if (sub->type == FLAC_SUBFRAME_LPC) {
+                int cbits = s->options.lpc_coeff_precision;
+                put_bits( &s->pb, 4, cbits-1);
+                put_sbits(&s->pb, 5, sub->shift);
+                for (i = 0; i < sub->order; i++)
+                    put_sbits(&s->pb, cbits, sub->coefs[i]);
+            }
+
+            /* rice-encoded block */
+            put_bits(&s->pb, 2, 0);
+
+            /* partition order */
+            porder  = sub->rc.porder;
+            psize   = s->frame.blocksize >> porder;
+            put_bits(&s->pb, 4, porder);
+
+            /* residual */
+            part_end  = &sub->residual[psize];
+            for (p = 0; p < 1 << porder; p++) {
+                int k = sub->rc.params[p];
+                put_bits(&s->pb, 4, k);
+                while (res < part_end)
+                    set_sr_golomb_flac(&s->pb, *res++, k, INT32_MAX, 0);
+                part_end = FFMIN(frame_end, part_end + psize);
+            }
         }
     }
 }
 
-static void output_frame_footer(FlacEncodeContext *s)
+
+static void write_frame_footer(FlacEncodeContext *s)
 {
     int crc;
     flush_put_bits(&s->pb);
-    crc = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0,
-                          s->pb.buf, put_bits_count(&s->pb)>>3));
+    crc = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, s->pb.buf,
+                            put_bits_count(&s->pb)>>3));
     put_bits(&s->pb, 16, crc);
     flush_put_bits(&s->pb);
 }
 
-static void update_md5_sum(FlacEncodeContext *s, int16_t *samples)
+
+static int write_frame(FlacEncodeContext *s, AVPacket *avpkt)
+{
+    init_put_bits(&s->pb, avpkt->data, avpkt->size);
+    write_frame_header(s);
+    write_subframes(s);
+    write_frame_footer(s);
+    return put_bits_count(&s->pb) >> 3;
+}
+
+
+static void update_md5_sum(FlacEncodeContext *s, const int16_t *samples)
 {
 #if HAVE_BIGENDIAN
     int i;
-    for(i = 0; i < s->frame.blocksize*s->channels; i++) {
+    for (i = 0; i < s->frame.blocksize * s->channels; i++) {
         int16_t smp = av_le2ne16(samples[i]);
         av_md5_update(s->md5ctx, (uint8_t *)&smp, 2);
     }
 #else
-    av_md5_update(s->md5ctx, (uint8_t *)samples, s->frame.blocksize*s->channels*2);
+    av_md5_update(s->md5ctx, (const uint8_t *)samples, s->frame.blocksize*s->channels*2);
 #endif
 }
 
-static int flac_encode_frame(AVCodecContext *avctx, uint8_t *frame,
-                             int buf_size, void *data)
+
+static int flac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+                             const AVFrame *frame, int *got_packet_ptr)
 {
-    int ch;
     FlacEncodeContext *s;
-    int16_t *samples = data;
-    int out_bytes;
-    int reencoded=0;
+    const int16_t *samples;
+    int frame_bytes, out_bytes, ret;
 
     s = avctx->priv_data;
 
-    if(buf_size < s->max_framesize*2) {
-        av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
-        return 0;
-    }
-
     /* when the last block is reached, update the header in extradata */
-    if (!data) {
+    if (!frame) {
         s->max_framesize = s->max_encoded_framesize;
         av_md5_final(s->md5ctx, s->md5sum);
         write_streaminfo(s, avctx->extradata);
         return 0;
     }
+    samples = (const int16_t *)frame->data[0];
+
+    /* change max_framesize for small final frame */
+    if (frame->nb_samples < s->frame.blocksize) {
+        s->max_framesize = ff_flac_get_max_frame_size(frame->nb_samples,
+                                                      s->channels, 16);
+    }
 
-    init_frame(s);
+    init_frame(s, frame->nb_samples);
 
     copy_samples(s, samples);
 
     channel_decorrelation(s);
 
-    for(ch=0; ch<s->channels; ch++) {
-        encode_residual(s, ch);
-    }
+    frame_bytes = encode_frame(s);
 
-write_frame:
-    init_put_bits(&s->pb, frame, buf_size);
-    output_frame_header(s);
-    output_subframes(s);
-    output_frame_footer(s);
-    out_bytes = put_bits_count(&s->pb) >> 3;
-
-    if(out_bytes > s->max_framesize) {
-        if(reencoded) {
-            /* still too large. must be an error. */
-            av_log(avctx, AV_LOG_ERROR, "error encoding frame\n");
-            return -1;
-        }
+    /* fallback to verbatim mode if the compressed frame is larger than it
+       would be if encoded uncompressed. */
+    if (frame_bytes > s->max_framesize) {
+        s->frame.verbatim_only = 1;
+        frame_bytes = encode_frame(s);
+    }
 
-        /* frame too large. use verbatim mode */
-        for(ch=0; ch<s->channels; ch++) {
-            encode_residual_v(s, ch);
-        }
-        reencoded = 1;
-        goto write_frame;
+    if ((ret = ff_alloc_packet(avpkt, frame_bytes))) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+        return ret;
     }
 
+    out_bytes = write_frame(s, avpkt);
+
     s->frame_count++;
-    s->sample_count += avctx->frame_size;
+    s->sample_count += frame->nb_samples;
     update_md5_sum(s, samples);
     if (out_bytes > s->max_encoded_framesize)
         s->max_encoded_framesize = out_bytes;
     if (out_bytes < s->min_framesize)
         s->min_framesize = out_bytes;
 
-    return out_bytes;
+    avpkt->pts      = frame->pts;
+    avpkt->duration = ff_samples_to_time_base(avctx, frame->nb_samples);
+    avpkt->size     = out_bytes;
+    *got_packet_ptr = 1;
+    return 0;
 }
 
+
 static av_cold int flac_encode_close(AVCodecContext *avctx)
 {
     if (avctx->priv_data) {
         FlacEncodeContext *s = avctx->priv_data;
         av_freep(&s->md5ctx);
+        ff_lpc_end(&s->lpc_ctx);
     }
     av_freep(&avctx->extradata);
     avctx->extradata_size = 0;
+#if FF_API_OLD_ENCODE_AUDIO
     av_freep(&avctx->coded_frame);
+#endif
     return 0;
 }
 
-AVCodec flac_encoder = {
-    "flac",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_FLAC,
-    sizeof(FlacEncodeContext),
-    flac_encode_init,
-    flac_encode_frame,
-    flac_encode_close,
-    NULL,
-    .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
-    .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
-    .long_name = NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"),
+#define FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
+static const AVOption options[] = {
+{ "lpc_coeff_precision", "LPC coefficient precision", offsetof(FlacEncodeContext, options.lpc_coeff_precision), AV_OPT_TYPE_INT, {.i64 = 15 }, 0, MAX_LPC_PRECISION, FLAGS },
+{ "lpc_type", "LPC algorithm", offsetof(FlacEncodeContext, options.lpc_type), AV_OPT_TYPE_INT, {.i64 = FF_LPC_TYPE_DEFAULT }, FF_LPC_TYPE_DEFAULT, FF_LPC_TYPE_NB-1, FLAGS, "lpc_type" },
+{ "none",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_NONE },     INT_MIN, INT_MAX, FLAGS, "lpc_type" },
+{ "fixed",    NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_FIXED },    INT_MIN, INT_MAX, FLAGS, "lpc_type" },
+{ "levinson", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_LEVINSON }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
+{ "cholesky", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_CHOLESKY }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
+{ "lpc_passes", "Number of passes to use for Cholesky factorization during LPC analysis", offsetof(FlacEncodeContext, options.lpc_passes),  AV_OPT_TYPE_INT, {.i64 = -1 }, INT_MIN, INT_MAX, FLAGS },
+{ "min_partition_order",  NULL, offsetof(FlacEncodeContext, options.min_partition_order),  AV_OPT_TYPE_INT, {.i64 = -1 },      -1, MAX_PARTITION_ORDER, FLAGS },
+{ "max_partition_order",  NULL, offsetof(FlacEncodeContext, options.max_partition_order),  AV_OPT_TYPE_INT, {.i64 = -1 },      -1, MAX_PARTITION_ORDER, FLAGS },
+{ "prediction_order_method", "Search method for selecting prediction order", offsetof(FlacEncodeContext, options.prediction_order_method), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, ORDER_METHOD_LOG, FLAGS, "predm" },
+{ "estimation", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_EST },    INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "2level",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_2LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "4level",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_4LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "8level",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_8LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "search",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_SEARCH }, INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "log",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_LOG },    INT_MIN, INT_MAX, FLAGS, "predm" },
+{ "ch_mode", "Stereo decorrelation mode", offsetof(FlacEncodeContext, options.ch_mode), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, FLAC_CHMODE_MID_SIDE, FLAGS, "ch_mode" },
+{ "auto",       NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1                      }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
+{ "indep",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_INDEPENDENT }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
+{ "left_side",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_LEFT_SIDE   }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
+{ "right_side", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_RIGHT_SIDE  }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
+{ "mid_side",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_MID_SIDE    }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
+{ NULL },
+};
+
+static const AVClass flac_encoder_class = {
+    "FLAC encoder",
+    av_default_item_name,
+    options,
+    LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_flac_encoder = {
+    .name           = "flac",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_FLAC,
+    .priv_data_size = sizeof(FlacEncodeContext),
+    .init           = flac_encode_init,
+    .encode2        = flac_encode_frame,
+    .close          = flac_encode_close,
+    .capabilities   = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
+    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+                                                     AV_SAMPLE_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"),
+    .priv_class     = &flac_encoder_class,
 };