Imported Upstream version 6.1

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

diff --git a/libavcodec/adx.c b/libavcodec/adx.c
index c60fabb..6323e5c 100644 (file)
--- a/libavcodec/adx.c
+++ b/libavcodec/adx.c
@@ -19,7 +19,6 @@
  */
 
 #include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "adx.h"
 
@@ -34,55 +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 ff_adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,
-                         int bufsize, int *header_size, int *coeff)
-{
-    int offset, cutoff, channels;
-
-    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 && offset >= 6 && 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) {
-        avpriv_request_sample(avctx, "Support for this ADX format");
-        return AVERROR_PATCHWELCOME;
-    }
-
-    /* channels */
-    channels = buf[7];
-    if (channels <= 0 || channels > 2)
-        return AVERROR_INVALIDDATA;
-
-    if (avctx->ch_layout.nb_channels != channels) {
-        av_channel_layout_uninit(&avctx->ch_layout);
-        avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
-        avctx->ch_layout.nb_channels = channels;
-    }
-
-    /* sample rate */
-    avctx->sample_rate = AV_RB32(buf + 8);
-    if (avctx->sample_rate < 1 ||
-        avctx->sample_rate > INT_MAX / (channels * BLOCK_SIZE * 8))
-        return AVERROR_INVALIDDATA;
-
-    /* bit rate */
-    avctx->bit_rate = avctx->sample_rate * 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;
-}