lavc: Move {min,max}_prediction_order to codec private options

These options are only used by alac and flac.
They are very codec-specific options, so deprecate the global variants.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavcodec/alacenc.c

@@ -19,6 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/opt.h"
+
 #include "avcodec.h"
 #include "put_bits.h"
 #include "internal.h"
@@ -57,6 +59,7 @@ typedef struct AlacLPCContext {
 } AlacLPCContext;
 
 typedef struct AlacEncodeContext {
+    AVCodecContext *avctx;
     int frame_size;                     /**< current frame size               */
     int verbatim;                       /**< current frame verbatim mode flag */
     int compression_level;
@@ -73,7 +76,6 @@ typedef struct AlacEncodeContext {
     RiceContext rc;
     AlacLPCContext lpc[2];
     LPCContext lpc_ctx;
-    AVCodecContext *avctx;
 } AlacEncodeContext;
 
 
@@ -544,7 +546,8 @@ static av_cold int alac_encode_init(AVCodecContext *avctx)
         AV_WB8(alac_extradata+20, s->rc.k_modifier);
     }
 
-    s->min_prediction_order = DEFAULT_MIN_PRED_ORDER;
+#if FF_API_PRIVATE_OPT
+FF_DISABLE_DEPRECATION_WARNINGS
     if (avctx->min_prediction_order >= 0) {
         if (avctx->min_prediction_order < MIN_LPC_ORDER ||
            avctx->min_prediction_order > ALAC_MAX_LPC_ORDER) {
@@ -557,7 +560,6 @@ static av_cold int alac_encode_init(AVCodecContext *avctx)
         s->min_prediction_order = avctx->min_prediction_order;
     }
 
-    s->max_prediction_order = DEFAULT_MAX_PRED_ORDER;
     if (avctx->max_prediction_order >= 0) {
         if (avctx->max_prediction_order < MIN_LPC_ORDER ||
             avctx->max_prediction_order > ALAC_MAX_LPC_ORDER) {
@@ -569,6 +571,8 @@ static av_cold int alac_encode_init(AVCodecContext *avctx)
 
         s->max_prediction_order = avctx->max_prediction_order;
     }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
 
     if (s->max_prediction_order < s->min_prediction_order) {
         av_log(avctx, AV_LOG_ERROR,
@@ -634,12 +638,29 @@ static int alac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     return 0;
 }
 
+#define OFFSET(x) offsetof(AlacEncodeContext, x)
+#define AE AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "min_prediction_order", NULL, OFFSET(min_prediction_order), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MIN_PRED_ORDER }, MIN_LPC_ORDER, ALAC_MAX_LPC_ORDER, AE },
+    { "max_prediction_order", NULL, OFFSET(max_prediction_order), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MAX_PRED_ORDER }, MIN_LPC_ORDER, ALAC_MAX_LPC_ORDER, AE },
+
+    { NULL },
+};
+
+static const AVClass alacenc_class = {
+    .class_name = "alacenc",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
 AVCodec ff_alac_encoder = {
     .name           = "alac",
     .long_name      = NULL_IF_CONFIG_SMALL("ALAC (Apple Lossless Audio Codec)"),
     .type           = AVMEDIA_TYPE_AUDIO,
     .id             = AV_CODEC_ID_ALAC,
     .priv_data_size = sizeof(AlacEncodeContext),
+    .priv_class     = &alacenc_class,
     .init           = alac_encode_init,
     .encode2        = alac_encode_frame,
     .close          = alac_encode_close,

libavcodec/avcodec.h

@@ -2386,19 +2386,15 @@ typedef struct AVCodecContext {
      */
     int trellis;
 
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
+#if FF_API_PRIVATE_OPT
+    /** @deprecated use encoder private options instead */
+    attribute_deprecated
     int min_prediction_order;
 
-    /**
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
+    /** @deprecated use encoder private options instead */
+    attribute_deprecated
     int max_prediction_order;
 
-#if FF_API_PRIVATE_OPT
     /** @deprecated use encoder private options instead */
     attribute_deprecated
     int64_t timecode_frame_start;

libavcodec/flacenc.c

@@ -325,9 +325,9 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
     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 == FF_LPC_TYPE_NONE) {
-        s->options.min_prediction_order = 0;
-    } else if (avctx->min_prediction_order >= 0) {
+#if FF_API_PRIVATE_OPT
+FF_DISABLE_DEPRECATION_WARNINGS
+    if (avctx->min_prediction_order >= 0) {
         if (s->options.lpc_type == FF_LPC_TYPE_FIXED) {
             if (avctx->min_prediction_order > MAX_FIXED_ORDER) {
                 av_log(avctx, AV_LOG_WARNING,
@@ -343,9 +343,7 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
         }
         s->options.min_prediction_order = avctx->min_prediction_order;
     }
-    if (s->options.lpc_type == FF_LPC_TYPE_NONE) {
-        s->options.max_prediction_order = 0;
-    } else if (avctx->max_prediction_order >= 0) {
+    if (avctx->max_prediction_order >= 0) {
         if (s->options.lpc_type == FF_LPC_TYPE_FIXED) {
             if (avctx->max_prediction_order > MAX_FIXED_ORDER) {
                 av_log(avctx, AV_LOG_WARNING,
@@ -361,6 +359,26 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
         }
         s->options.max_prediction_order = avctx->max_prediction_order;
     }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+    if (s->options.lpc_type == FF_LPC_TYPE_NONE) {
+        s->options.min_prediction_order = 0;
+        s->options.max_prediction_order = 0;
+    } else if (s->options.lpc_type == FF_LPC_TYPE_FIXED) {
+        if (s->options.min_prediction_order > MAX_FIXED_ORDER) {
+            av_log(avctx, AV_LOG_WARNING,
+                   "invalid min prediction order %d, clamped to %d\n",
+                   s->options.min_prediction_order, MAX_FIXED_ORDER);
+            s->options.min_prediction_order = MAX_FIXED_ORDER;
+        }
+        if (s->options.max_prediction_order > MAX_FIXED_ORDER) {
+            av_log(avctx, AV_LOG_WARNING,
+                   "invalid max prediction order %d, clamped to %d\n",
+                   s->options.max_prediction_order, MAX_FIXED_ORDER);
+            s->options.max_prediction_order = MAX_FIXED_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);
@@ -1332,6 +1350,9 @@ static const AVOption options[] = {
 { "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" },
+{ "min_prediction_order", NULL, offsetof(FlacEncodeContext, options.min_prediction_order), AV_OPT_TYPE_INT, { .i64 = 0 }, MIN_LPC_ORDER, MAX_LPC_ORDER, FLAGS },
+{ "max_prediction_order", NULL, offsetof(FlacEncodeContext, options.max_prediction_order), AV_OPT_TYPE_INT, { .i64 = 0 }, MIN_LPC_ORDER, MAX_LPC_ORDER, FLAGS },
+
 { NULL },
 };
 

libavcodec/options_table.h

@@ -410,9 +410,9 @@ static const AVOption avcodec_options[] = {
 {"b_sensitivity", "adjust sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), AV_OPT_TYPE_INT, {.i64 = 40 }, 1, INT_MAX, V|E},
 #endif
 {"compression_level", NULL, OFFSET(compression_level), AV_OPT_TYPE_INT, {.i64 = FF_COMPRESSION_DEFAULT }, INT_MIN, INT_MAX, V|A|E},
+#if FF_API_PRIVATE_OPT
 {"min_prediction_order", NULL, OFFSET(min_prediction_order), AV_OPT_TYPE_INT, {.i64 = -1 }, INT_MIN, INT_MAX, A|E},
 {"max_prediction_order", NULL, OFFSET(max_prediction_order), AV_OPT_TYPE_INT, {.i64 = -1 }, INT_MIN, INT_MAX, A|E},
-#if FF_API_PRIVATE_OPT
 {"timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, V|E},
 #endif
 {"bits_per_raw_sample", NULL, OFFSET(bits_per_raw_sample), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX},