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-rw-r--r--libavcodec/wmadec.c91
1 files changed, 69 insertions, 22 deletions
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 50c77dd100..78b51e5871 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -1,21 +1,21 @@
/*
* WMA compatible decoder
- * Copyright (c) 2002 The Libav Project
+ * Copyright (c) 2002 The FFmpeg Project
*
- * 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
*/
@@ -34,6 +34,7 @@
*/
#include "libavutil/attributes.h"
+#include "libavutil/ffmath.h"
#include "avcodec.h"
#include "internal.h"
@@ -91,6 +92,16 @@ static av_cold int wma_decode_init(AVCodecContext *avctx)
s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
+ if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 8){
+ if (AV_RL16(extradata+4)==0xd && s->use_variable_block_len){
+ av_log(avctx, AV_LOG_WARNING, "Disabling use_variable_block_len, if this fails contact the ffmpeg developers and send us the file\n");
+ s->use_variable_block_len= 0; // this fixes issue1503
+ }
+ }
+
+ for (i=0; i<MAX_CHANNELS; i++)
+ s->max_exponent[i] = 1.0;
+
if (ff_wma_init(avctx, flags2) < 0)
return -1;
@@ -153,7 +164,7 @@ static av_cold void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len)
/* tables for x^-0.25 computation */
for (i = 0; i < 256; i++) {
e = i - 126;
- s->lsp_pow_e_table[i] = pow(2.0, e * -0.25);
+ s->lsp_pow_e_table[i] = exp2f(e * -0.25);
}
/* NOTE: these two tables are needed to avoid two operations in
@@ -162,7 +173,7 @@ static av_cold void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len)
for (i = (1 << LSP_POW_BITS) - 1; i >= 0; i--) {
m = (1 << LSP_POW_BITS) + i;
a = (float) m * (0.5 / (1 << LSP_POW_BITS));
- a = pow(a, -0.25);
+ a = 1/sqrt(sqrt(a));
s->lsp_pow_m_table1[i] = 2 * a - b;
s->lsp_pow_m_table2[i] = b - a;
b = a;
@@ -377,14 +388,14 @@ static void wma_window(WMACodecContext *s, float *out)
block_len = s->block_len;
bsize = s->frame_len_bits - s->block_len_bits;
- s->fdsp.vector_fmul_add(out, in, s->windows[bsize],
+ s->fdsp->vector_fmul_add(out, in, s->windows[bsize],
out, block_len);
} else {
block_len = 1 << s->prev_block_len_bits;
n = (s->block_len - block_len) / 2;
bsize = s->frame_len_bits - s->prev_block_len_bits;
- s->fdsp.vector_fmul_add(out + n, in + n, s->windows[bsize],
+ s->fdsp->vector_fmul_add(out + n, in + n, s->windows[bsize],
out + n, block_len);
memcpy(out + n + block_len, in + n + block_len, n * sizeof(float));
@@ -398,7 +409,7 @@ static void wma_window(WMACodecContext *s, float *out)
block_len = s->block_len;
bsize = s->frame_len_bits - s->block_len_bits;
- s->fdsp.vector_fmul_reverse(out, in, s->windows[bsize], block_len);
+ s->fdsp->vector_fmul_reverse(out, in, s->windows[bsize], block_len);
} else {
block_len = 1 << s->next_block_len_bits;
n = (s->block_len - block_len) / 2;
@@ -406,7 +417,7 @@ static void wma_window(WMACodecContext *s, float *out)
memcpy(out, in, n * sizeof(float));
- s->fdsp.vector_fmul_reverse(out + n, in + n, s->windows[bsize],
+ s->fdsp->vector_fmul_reverse(out + n, in + n, s->windows[bsize],
block_len);
memset(out + n + block_len, 0, n * sizeof(float));
@@ -472,6 +483,11 @@ static int wma_decode_block(WMACodecContext *s)
s->block_len_bits = s->frame_len_bits;
}
+ if (s->frame_len_bits - s->block_len_bits >= s->nb_block_sizes){
+ av_log(s->avctx, AV_LOG_ERROR, "block_len_bits not initialized to a valid value\n");
+ return -1;
+ }
+
/* now check if the block length is coherent with the frame length */
s->block_len = 1 << s->block_len_bits;
if ((s->block_pos + s->block_len) > s->frame_len) {
@@ -499,6 +515,10 @@ static int wma_decode_block(WMACodecContext *s)
* coef escape coding */
total_gain = 1;
for (;;) {
+ if (get_bits_left(&s->gb) < 7) {
+ av_log(s->avctx, AV_LOG_ERROR, "total_gain overread\n");
+ return AVERROR_INVALIDDATA;
+ }
a = get_bits(&s->gb, 7);
total_gain += a;
if (a != 127)
@@ -607,7 +627,7 @@ static int wma_decode_block(WMACodecContext *s)
coefs1 = s->coefs1[ch];
exponents = s->exponents[ch];
esize = s->exponents_bsize[ch];
- mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
+ mult = ff_exp10(total_gain * 0.05) / s->max_exponent[ch];
mult *= mdct_norm;
coefs = s->coefs[ch];
if (s->use_noise_coding) {
@@ -655,7 +675,7 @@ static int wma_decode_block(WMACodecContext *s)
/* use noise with specified power */
mult1 = sqrt(exp_power[j] / exp_power[last_high_band]);
/* XXX: use a table */
- mult1 = mult1 * pow(10, s->high_band_values[ch][j] * 0.05);
+ mult1 = mult1 * ff_exp10(s->high_band_values[ch][j] * 0.05);
mult1 = mult1 / (s->max_exponent[ch] * s->noise_mult);
mult1 *= mdct_norm;
for (i = 0; i < n; i++) {
@@ -678,7 +698,7 @@ static int wma_decode_block(WMACodecContext *s)
/* very high freqs : noise */
n = s->block_len - s->coefs_end[bsize];
- mult1 = mult * exponents[((-1 << bsize)) >> esize];
+ mult1 = mult * exponents[(-(1 << bsize)) >> esize];
for (i = 0; i < n; i++) {
*coefs++ = s->noise_table[s->noise_index] * mult1;
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
@@ -716,7 +736,7 @@ static int wma_decode_block(WMACodecContext *s)
s->channel_coded[0] = 1;
}
- s->fdsp.butterflies_float(s->coefs[0], s->coefs[1], s->block_len);
+ s->fdsp->butterflies_float(s->coefs[0], s->coefs[1], s->block_len);
}
next:
@@ -808,7 +828,8 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
buf_size, avctx->block_align);
return AVERROR_INVALIDDATA;
}
- buf_size = avctx->block_align;
+ if (avctx->block_align)
+ buf_size = avctx->block_align;
init_get_bits(&s->gb, buf, buf_size * 8);
@@ -816,15 +837,38 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
/* read super frame header */
skip_bits(&s->gb, 4); /* super frame index */
nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0);
+ if (nb_frames <= 0) {
+ int is_error = nb_frames < 0 || get_bits_left(&s->gb) <= 8;
+ av_log(avctx, is_error ? AV_LOG_ERROR : AV_LOG_WARNING,
+ "nb_frames is %d bits left %d\n",
+ nb_frames, get_bits_left(&s->gb));
+ if (is_error)
+ return AVERROR_INVALIDDATA;
+
+ if ((s->last_superframe_len + buf_size - 1) >
+ MAX_CODED_SUPERFRAME_SIZE)
+ goto fail;
+
+ q = s->last_superframe + s->last_superframe_len;
+ len = buf_size - 1;
+ while (len > 0) {
+ *q++ = get_bits (&s->gb, 8);
+ len --;
+ }
+ memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+ s->last_superframe_len += 8*buf_size - 8;
+// s->reset_block_lengths = 1; //XXX is this needed ?
+ *got_frame_ptr = 0;
+ return buf_size;
+ }
} else
nb_frames = 1;
/* get output buffer */
frame->nb_samples = nb_frames * s->frame_len;
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
- }
samples = (float **) frame->extended_data;
samples_offset = 0;
@@ -901,13 +945,13 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
samples_offset += s->frame_len;
}
- ff_dlog(s->avctx, "%d %d %d %d outbytes:%td eaten:%d\n",
+ ff_dlog(s->avctx, "%d %d %d %d outbytes:%"PTRDIFF_SPECIFIER" eaten:%d\n",
s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len,
(int8_t *) samples - (int8_t *) data, avctx->block_align);
*got_frame_ptr = 1;
- return avctx->block_align;
+ return buf_size;
fail:
/* when error, we reset the bit reservoir */
@@ -923,6 +967,7 @@ static av_cold void flush(AVCodecContext *avctx)
s->last_superframe_len = 0;
}
+#if CONFIG_WMAV1_DECODER
AVCodec ff_wmav1_decoder = {
.name = "wmav1",
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
@@ -937,7 +982,8 @@ AVCodec ff_wmav1_decoder = {
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
};
-
+#endif
+#if CONFIG_WMAV2_DECODER
AVCodec ff_wmav2_decoder = {
.name = "wmav2",
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
@@ -952,3 +998,4 @@ AVCodec ff_wmav2_decoder = {
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
};
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 10:41:31 +0000