ADPCM IMA WAV 2, 3 and 5 bits decoder

[ffmpeg.git] / libavcodec / utils.c

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index f26e260..d77b5ec 100644 (file)
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -2899,7 +2899,9 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
                 int blocks = frame_bytes / ba;
                 switch (avctx->codec_id) {
                 case AV_CODEC_ID_ADPCM_IMA_WAV:
-                    return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
+                    if (bps < 2 || bps > 5)
+                        return 0;
+                    return blocks * (1 + (ba - 4 * ch) / (bps * ch) * 8);
                 case AV_CODEC_ID_ADPCM_IMA_DK3:
                     return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
                 case AV_CODEC_ID_ADPCM_IMA_DK4: