flac-lpc patch by (Justin Ruggles jruggle earthlink net)

tabs removed and regression.sh fixed (it was missing in the patch) by me

Originally committed as revision 5572 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -1983,6 +1983,58 @@ typedef struct AVCodecContext {
      * - decoding: unused
      */
     int b_sensitivity;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int compression_level;
+#define FF_COMPRESSION_DEFAULT -1
+
+    /**
+     * sets whether to use LPC mode - used by FLAC encoder
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int use_lpc;
+
+    /**
+     * LPC coefficient precision - used by FLAC encoder
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int lpc_coeff_precision;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int min_prediction_order;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int max_prediction_order;
+
+    /**
+     * search method for selecting prediction order
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int prediction_order_method;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int min_partition_order;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int max_partition_order;
 } AVCodecContext;
 
 /**

libavcodec/utils.c

@@ -744,6 +744,14 @@ static AVOption options[]={
 {"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},
 {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
 {"b_sensitivity", NULL, OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},
+{"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},
+{"use_lpc", NULL, OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
+{"lpc_coeff_precision", NULL, OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},
+{"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
+{"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
+{"prediction_order_method", NULL, OFFSET(prediction_order_method), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
+{"min_partition_order", NULL, OFFSET(min_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
+{"max_partition_order", NULL, OFFSET(max_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 {NULL},
 };
 
@@ -800,6 +808,13 @@ void avcodec_get_context_defaults(AVCodecContext *s){
     s->sample_fmt= SAMPLE_FMT_S16; // FIXME: set to NONE
     s->mv0_threshold= 256;
     s->b_sensitivity= 40;
+    s->compression_level = FF_COMPRESSION_DEFAULT;
+    s->use_lpc = -1;
+    s->min_prediction_order = -1;
+    s->max_prediction_order = -1;
+    s->prediction_order_method = -1;
+    s->min_partition_order = -1;
+    s->max_partition_order = -1;
 
     s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
     s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;

tests/ffmpeg.regression.ref

@@ -176,7 +176,7 @@ stddev:1050.18 PSNR:35.89 bytes:1054720
 264236 ./data/a-adpcm_yam.wav
 e92cec8c07913ffb91ad2b11f79cdc00 *./data/out.wav
 stddev:18312.68 PSNR:11.06 bytes:1056768
-9ab5f311b70bc1fa8591b891db50b386 *./data/a-flac.flac
-353384 ./data/a-flac.flac
+c3382f03ce2efb5d475240d288a33898 *./data/a-flac.flac
+353368 ./data/a-flac.flac
 c4228df189aad9567a037727d0e763e4 *./data/out.wav
 stddev: 33.31 PSNR:65.87 bytes:1040384

tests/regression.sh

@@ -599,7 +599,7 @@ fi
 if [ -n "$do_flac" ] ; then
 # encoding
 file=${outfile}flac.flac
-do_ffmpeg $file -y -ab 128 -ac 2 -ar 44100 -f s16le -i $pcm_src -acodec flac $file
+do_ffmpeg $file -y -ab 128 -ac 2 -ar 44100 -f s16le -i $pcm_src -acodec flac -compression_level 2 $file
 
 # decoding
 do_ffmpeg $pcm_dst -y -i $file -f wav $pcm_dst

tests/rotozoom.regression.ref

@@ -176,7 +176,7 @@ stddev:1050.18 PSNR:35.89 bytes:1054720
 264236 ./data/a-adpcm_yam.wav
 e92cec8c07913ffb91ad2b11f79cdc00 *./data/out.wav
 stddev:18312.68 PSNR:11.06 bytes:1056768
-9ab5f311b70bc1fa8591b891db50b386 *./data/a-flac.flac
-353384 ./data/a-flac.flac
+c3382f03ce2efb5d475240d288a33898 *./data/a-flac.flac
+353368 ./data/a-flac.flac
 c4228df189aad9567a037727d0e763e4 *./data/out.wav
 stddev: 33.31 PSNR:65.87 bytes:1040384