avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / amrwbdec.c

diff --git a/libavcodec/amrwbdec.c b/libavcodec/amrwbdec.c
index b488a5d3c7e22293ee2cfe20cf15dc00e90039a2..a6c1d894d75cb780b5b04ea88a8d3a46d05a9990 100644 (file)
--- a/libavcodec/amrwbdec.c
+++ b/libavcodec/amrwbdec.c
@@ -1121,9 +1121,13 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
     header_size      = decode_mime_header(ctx, buf);
     expected_fr_size = ((cf_sizes_wb[ctx->fr_cur_mode] + 7) >> 3) + 1;
 
-    if (ctx->fr_cur_mode == NO_DATA) {
-        for (i = 0; i < frame->nb_samples; i++)
-            buf_out[i] = 0.f;
+    if (!ctx->fr_quality)
+        av_log(avctx, AV_LOG_ERROR, "Encountered a bad or corrupted frame\n");
+
+    if (ctx->fr_cur_mode == NO_DATA || !ctx->fr_quality) {
+        /* The specification suggests a "random signal" and
+           "a muting technique" to "gradually decrease the output level". */
+        av_samples_set_silence(&frame->data[0], 0, frame->nb_samples, 1, AV_SAMPLE_FMT_FLT);
         *got_frame_ptr = 1;
         return expected_fr_size;
     }
@@ -1140,9 +1144,6 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
         return AVERROR_INVALIDDATA;
     }
 
-    if (!ctx->fr_quality || ctx->fr_cur_mode > MODE_SID)
-        av_log(avctx, AV_LOG_ERROR, "Encountered a bad or corrupted frame\n");
-
     if (ctx->fr_cur_mode == MODE_SID) { /* Comfort noise frame */
         avpriv_request_sample(avctx, "SID mode");
         return AVERROR_PATCHWELCOME;
@@ -1274,7 +1275,7 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
     return expected_fr_size;
 }
 
-AVCodec ff_amrwb_decoder = {
+const AVCodec ff_amrwb_decoder = {
     .name           = "amrwb",
     .long_name      = NULL_IF_CONFIG_SMALL("AMR-WB (Adaptive Multi-Rate WideBand)"),
     .type           = AVMEDIA_TYPE_AUDIO,
@@ -1282,7 +1283,7 @@ AVCodec ff_amrwb_decoder = {
     .priv_data_size = sizeof(AMRWBContext),
     .init           = amrwb_decode_init,
     .decode         = amrwb_decode_frame,
-    .capabilities   = AV_CODEC_CAP_DR1,
+    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
     .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLT,
                                                      AV_SAMPLE_FMT_NONE },
 };