Imported Upstream version 6.1

[platform/upstream/ffmpeg.git] / libavcodec / adx.c

diff --git a/libavcodec/adx.c b/libavcodec/adx.c
index 870216c..6323e5c 100644 (file)
--- a/libavcodec/adx.c
+++ b/libavcodec/adx.c
@@ -1,25 +1,24 @@
 /*
  * Copyright (c) 2011  Justin Ruggles
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "adx.h"
 
@@ -34,49 +33,3 @@ void ff_adx_calculate_coeffs(int cutoff, int sample_rate, int bits, int *coeff)
     coeff[0] = lrintf(c * 2.0  * (1 << bits));
     coeff[1] = lrintf(-(c * c) * (1 << bits));
 }
-
-int avpriv_adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,
-                             int bufsize, int *header_size, int *coeff)
-{
-    int offset, cutoff;
-
-    if (bufsize < 24)
-        return AVERROR_INVALIDDATA;
-
-    if (AV_RB16(buf) != 0x8000)
-        return AVERROR_INVALIDDATA;
-    offset = AV_RB16(buf + 2) + 4;
-
-    /* if copyright string is within the provided data, validate it */
-    if (bufsize >= offset && memcmp(buf + offset - 6, "(c)CRI", 6))
-        return AVERROR_INVALIDDATA;
-
-    /* check for encoding=3 block_size=18, sample_size=4 */
-    if (buf[4] != 3 || buf[5] != 18 || buf[6] != 4) {
-        av_log_ask_for_sample(avctx, "unsupported ADX format\n");
-        return AVERROR_PATCHWELCOME;
-    }
-
-    /* channels */
-    avctx->channels = buf[7];
-    if (avctx->channels <= 0 || avctx->channels > 2)
-        return AVERROR_INVALIDDATA;
-
-    /* sample rate */
-    avctx->sample_rate = AV_RB32(buf + 8);
-    if (avctx->sample_rate < 1 ||
-        avctx->sample_rate > INT_MAX / (avctx->channels * BLOCK_SIZE * 8))
-        return AVERROR_INVALIDDATA;
-
-    /* bit rate */
-    avctx->bit_rate = avctx->sample_rate * avctx->channels * BLOCK_SIZE * 8 / BLOCK_SAMPLES;
-
-    /* LPC coefficients */
-    if (coeff) {
-        cutoff = AV_RB16(buf + 16);
-        ff_adx_calculate_coeffs(cutoff, avctx->sample_rate, COEFF_BITS, coeff);
-    }
-
-    *header_size = offset;
-    return 0;
-}