@@ -62,7 +62,7 @@ static int aac_adtstoasc_filter(AVBitStreamFilterContext *bsfc,

     if (!hdr.crc_absent && hdr.num_aac_frames > 1) {

         av_log_missing_feature(avctx, "Multiple RDBs per frame with CRC", 0);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     buf      += AAC_ADTS_HEADER_SIZE + 2*!hdr.crc_absent;

@@ -75,7 +75,7 @@ static int aac_adtstoasc_filter(AVBitStreamFilterContext *bsfc,

             init_get_bits(&gb, buf, buf_size * 8);

             if (get_bits(&gb, 3) != 5) {

                 av_log_missing_feature(avctx, "PCE based channel configuration, where the PCE is not the first syntax element", 0);

-                return -1;

+                return AVERROR_PATCHWELCOME;

             }

             init_put_bits(&pb, pce_data, MAX_PCE_SIZE);

             pce_size = avpriv_copy_pce_data(&pb, &gb)/8;

@@ -634,7 +634,7 @@ static int decode_ga_specific_config(AACContext *ac, AVCodecContext *avctx,

     if (get_bits1(gb)) { // frameLengthFlag

         av_log_missing_feature(avctx, "960/120 MDCT window", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     if (get_bits1(gb))       // dependsOnCoreCoder

@@ -1635,7 +1635,7 @@ static int decode_ics(AACContext *ac, SingleChannelElement *sce,

             return -1;

         if (get_bits1(gb)) {

             av_log_missing_feature(ac->avctx, "SSR", 1);

-            return -1;

+            return AVERROR_PATCHWELCOME;

         }

     }

@@ -2324,7 +2324,7 @@ static int parse_adts_frame_header(AACContext *ac, GetBitContext *gb)

     if (size > 0) {

         if (hdr_info.num_aac_frames != 1) {

             av_log_missing_feature(ac->avctx, "More than one AAC RDB per ADTS frame", 0);

-            return -1;

+            return AVERROR_PATCHWELCOME;

         }

         push_output_configuration(ac);

         if (hdr_info.chan_config) {

@@ -2609,7 +2609,7 @@ static int latm_decode_audio_specific_config(struct LATMContext *latmctx,

     if (config_start_bit % 8) {

         av_log_missing_feature(latmctx->aac_ctx.avctx,

                                "Non-byte-aligned audio-specific config", 1);

-        return AVERROR_INVALIDDATA;

+        return AVERROR_PATCHWELCOME;

     }

     if (asclen <= 0)

         return AVERROR_INVALIDDATA;

@@ -876,7 +876,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)

             if (s->eac3 && get_bits1(gbc)) {

                 /* TODO: parse enhanced coupling strategy info */

                 av_log_missing_feature(s->avctx, "Enhanced coupling", 1);

-                return -1;

+                return AVERROR_PATCHWELCOME;

             }

             /* determine which channels are coupled */

@@ -427,9 +427,9 @@ static int check_specific_config(ALSDecContext *ctx)

         }                                               \

     }

-    MISSING_ERR(sconf->floating,             "Floating point decoding",     -1);

-    MISSING_ERR(sconf->rlslms,               "Adaptive RLS-LMS prediction", -1);

-    MISSING_ERR(sconf->chan_sort,            "Channel sorting",              0);

+    MISSING_ERR(sconf->floating,  "Floating point decoding",     AVERROR_PATCHWELCOME);

+    MISSING_ERR(sconf->rlslms,    "Adaptive RLS-LMS prediction", AVERROR_PATCHWELCOME);

+    MISSING_ERR(sconf->chan_sort, "Channel sorting",             0);

     return error;

 }

@@ -951,7 +951,7 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data,

     }

     if (p->cur_frame_mode == MODE_DTX) {

         av_log_missing_feature(avctx, "dtx mode", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     if (p->cur_frame_mode == MODE_12k2) {

@@ -1111,7 +1111,7 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,

     if (ctx->fr_cur_mode == MODE_SID) { /* Comfort noise frame */

         av_log_missing_feature(avctx, "SID mode", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     ff_amr_bit_reorder((uint16_t *) &ctx->frame, sizeof(AMRWBFrame),

@@ -322,7 +322,7 @@ int ff_eac3_parse_header(AC3DecodeContext *s)

            handled like AC-3 DolbyNet, but we cannot be sure until we have a

            sample which utilizes this feature. */

         av_log_missing_feature(s->avctx, "Reduced sampling rates", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     skip_bits(gbc, 5); // skip bitstream id

@@ -372,7 +372,7 @@ static inline int decode_subframe(FLACContext *s, int channel)

     }

     if (bps > 32) {

         av_log_missing_feature(s->avctx, "decorrelated bit depth > 32", 0);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

 //FIXME use av_log2 for types

@@ -130,7 +130,7 @@ static av_cold int mpc8_decode_init(AVCodecContext * avctx)

     channels = get_bits(&gb, 4) + 1;

     if (channels > 2) {

         av_log_missing_feature(avctx, "Multichannel MPC SV8", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     c->MSS = get_bits1(&gb);

     c->frames = 1 << (get_bits(&gb, 3) * 2);

@@ -222,7 +222,7 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)

         }

         if (s->format == FORMAT_ENCRYPTED) {

             av_log_missing_feature(s->avctx, "Encrypted TTA", 0);

-            return AVERROR(EINVAL);

+            return AVERROR_PATCHWELCOME;

         }

         avctx->channels = s->channels = get_bits(&s->gb, 16);

         avctx->bits_per_coded_sample = get_bits(&s->gb, 16);

@@ -314,7 +314,7 @@ static av_cold int decode_init(AVCodecContext *avctx)

     bits = ff_wma_get_frame_len_bits(avctx->sample_rate, 3, s->decode_flags);

     if (bits > WMAPRO_BLOCK_MAX_BITS) {

         av_log_missing_feature(avctx, "14-bits block sizes", 1);

-        return AVERROR_INVALIDDATA;

+        return AVERROR_PATCHWELCOME;

     }

     s->samples_per_frame = 1 << bits;

@@ -1763,7 +1763,7 @@ static int synth_superframe(AVCodecContext *ctx, int *got_frame_ptr)

      * the wild yet. */

     if (!get_bits1(gb)) {

         av_log_missing_feature(ctx, "WMAPro-in-WMAVoice support", 1);

-        return -1;

+        return AVERROR_PATCHWELCOME;

     }

     /* (optional) nr. of samples in superframe; always <= 480 and >= 0 */

@@ -99,7 +99,7 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,

         if (!is_start || !is_finish) {

             av_log_missing_feature(s, "RTP-X-QT with payload description "

                                       "split over several packets", 1);

-            return AVERROR(ENOSYS);

+            return AVERROR_PATCHWELCOME;

         }

         skip_bits(&gb, 12); // reserved

         data_len = get_bits(&gb, 16);

@@ -162,7 +162,7 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,

     if (has_packet_info) {

         av_log_missing_feature(s, "RTP-X-QT with packet specific info", 1);

-        return AVERROR(ENOSYS);

+        return AVERROR_PATCHWELCOME;

     }

     alen = len - avio_tell(&pb);

@@ -225,7 +225,7 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,

     default:  /* unimplemented */

         av_log_missing_feature(NULL, "RTP-X-QT with packing scheme 2", 1);

-        return AVERROR(ENOSYS);

+        return AVERROR_PATCHWELCOME;

     }

 }