add FF_API_USE_LPC define to disable the deprecated AVCodecContext.use_lpc field

Originally committed as revision 25275 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -66,6 +66,9 @@
 #ifndef FF_API_SUBTITLE_OLD
 #define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
 #endif
+#ifndef FF_API_USE_LPC
+#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
 
 #define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
 #define AV_TIME_BASE            1000000
@@ -2453,7 +2456,7 @@ typedef struct AVCodecContext {
     int compression_level;
 #define FF_COMPRESSION_DEFAULT -1
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
+#if FF_API_USE_LPC
     /**
      * Sets whether to use LPC mode - used by FLAC encoder.
      * - encoding: Set by user.

libavcodec/flacenc.c

@@ -288,7 +288,7 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
     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
+#if FF_API_USE_LPC
     /* for compatibility with deprecated AVCodecContext.use_lpc */
     if (avctx->use_lpc == 0) {
         s->options.lpc_type = AV_LPC_TYPE_FIXED;

libavcodec/options.c

@@ -382,7 +382,7 @@ static const AVOption options[]={
 {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
 {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", 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},
-#if LIBAVCODEC_VERSION_MAJOR < 53
+#if FF_API_USE_LPC
 {"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 #endif
 {"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},