#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
+#include "libavutil/crc.h"
#include "libavutil/opt.h"
#include "lossless_audiodsp.h"
#include "avcodec.h"
unsigned int sample_pos;
} APEPredictor;
+typedef struct APEPredictor64 {
+ int64_t *buf;
+
+ int64_t lastA[2];
+
+ int64_t filterA[2];
+ int64_t filterB[2];
+
+ uint64_t coeffsA[2][4]; ///< adaption coefficients
+ uint64_t coeffsB[2][5]; ///< adaption coefficients
+ int64_t historybuffer[HISTORY_SIZE + PREDICTOR_SIZE];
+
+ unsigned int sample_pos;
+} APEPredictor64;
+
/** Decoder context */
typedef struct APEContext {
AVClass *class; ///< class for AVOptions
int fset; ///< which filter set to use (calculated from compression level)
int flags; ///< global decoder flags
- uint32_t CRC; ///< frame CRC
+ uint32_t CRC; ///< signalled frame CRC
+ uint32_t CRC_state; ///< accumulated CRC
int frameflags; ///< frame flags
APEPredictor predictor; ///< predictor used for final reconstruction
+ APEPredictor64 predictor64; ///< 64bit predictor used for final reconstruction
int32_t *decoded_buffer;
int decoded_size;
av_log(avctx, AV_LOG_ERROR, "Only mono and stereo is supported\n");
return AVERROR(EINVAL);
}
+ avctx->bits_per_raw_sample =
s->bps = avctx->bits_per_coded_sample;
switch (s->bps) {
case 8:
for (i = 0; i < APE_FILTER_LEVELS; i++) {
if (!ape_filter_orders[s->fset][i])
break;
- FF_ALLOC_OR_GOTO(avctx, s->filterbuf[i],
- (ape_filter_orders[s->fset][i] * 3 + HISTORY_SIZE) * 4,
- filter_alloc_fail);
+ if (!(s->filterbuf[i] = av_malloc((ape_filter_orders[s->fset][i] * 3 + HISTORY_SIZE) * 4)))
+ return AVERROR(ENOMEM);
}
if (s->fileversion < 3860) {
avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
return 0;
-filter_alloc_fail:
- ape_decode_close(avctx);
- return AVERROR(ENOMEM);
}
/**
x = (overflow << rice->k) + get_bits(gb, rice->k);
} else {
av_log(ctx->avctx, AV_LOG_ERROR, "Too many bits: %"PRIu32"\n", rice->k);
+ ctx->error = 1;
return AVERROR_INVALIDDATA;
}
rice->ksum += x - (rice->ksum + 8 >> 4);
static inline int ape_decode_value_3990(APEContext *ctx, APERice *rice)
{
- unsigned int x, overflow;
- int base, pivot;
+ unsigned int x, overflow, pivot;
+ int base;
- pivot = rice->ksum >> 5;
- if (pivot == 0)
- pivot = 1;
+ pivot = FFMAX(rice->ksum >> 5, 1);
overflow = range_get_symbol(ctx, counts_3980, counts_diff_3980);
return ((x >> 1) ^ ((x & 1) - 1)) + 1;
}
+static int get_k(int ksum)
+{
+ return av_log2(ksum) + !!ksum;
+}
+
static void decode_array_0000(APEContext *ctx, GetBitContext *gb,
int32_t *out, APERice *rice, int blockstodecode)
{
out[i] = get_rice_ook(&ctx->gb, 10);
rice->ksum += out[i];
}
- rice->k = av_log2(rice->ksum / 10) + 1;
+
+ if (blockstodecode <= 5)
+ goto end;
+
+ rice->k = get_k(rice->ksum / 10);
if (rice->k >= 24)
return;
for (; i < FFMIN(blockstodecode, 64); i++) {
out[i] = get_rice_ook(&ctx->gb, rice->k);
rice->ksum += out[i];
- rice->k = av_log2(rice->ksum / ((i + 1) * 2)) + 1;
+ rice->k = get_k(rice->ksum / ((i + 1) * 2));
if (rice->k >= 24)
return;
}
+
+ if (blockstodecode <= 64)
+ goto end;
+
+ rice->k = get_k(rice->ksum >> 7);
ksummax = 1 << rice->k + 7;
ksummin = rice->k ? (1 << rice->k + 6) : 0;
for (; i < blockstodecode; i++) {
+ if (get_bits_left(&ctx->gb) < 1) {
+ ctx->error = 1;
+ return;
+ }
out[i] = get_rice_ook(&ctx->gb, rice->k);
- rice->ksum += out[i] - out[i - 64];
+ rice->ksum += out[i] - (unsigned)out[i - 64];
while (rice->ksum < ksummin) {
rice->k--;
ksummin = rice->k ? ksummin >> 1 : 0;
}
}
+end:
for (i = 0; i < blockstodecode; i++)
out[i] = ((out[i] >> 1) ^ ((out[i] & 1) - 1)) + 1;
}
/* Read the frame flags if they exist */
ctx->frameflags = 0;
+ ctx->CRC_state = UINT32_MAX;
if ((ctx->fileversion > 3820) && (ctx->CRC & 0x80000000)) {
ctx->CRC &= ~0x80000000;
360, 317, -109, 98
};
+static const int64_t initial_coeffs_3930_64bit[4] = {
+ 360, 317, -109, 98
+};
+
static void init_predictor_decoder(APEContext *ctx)
{
APEPredictor *p = &ctx->predictor;
+ APEPredictor64 *p64 = &ctx->predictor64;
/* Zero the history buffers */
memset(p->historybuffer, 0, PREDICTOR_SIZE * sizeof(*p->historybuffer));
+ memset(p64->historybuffer, 0, PREDICTOR_SIZE * sizeof(*p64->historybuffer));
p->buf = p->historybuffer;
+ p64->buf = p64->historybuffer;
/* Initialize and zero the coefficients */
if (ctx->fileversion < 3930) {
} else {
memcpy(p->coeffsA[0], initial_coeffs_3930, sizeof(initial_coeffs_3930));
memcpy(p->coeffsA[1], initial_coeffs_3930, sizeof(initial_coeffs_3930));
+ memcpy(p64->coeffsA[0], initial_coeffs_3930_64bit, sizeof(initial_coeffs_3930_64bit));
+ memcpy(p64->coeffsA[1], initial_coeffs_3930_64bit, sizeof(initial_coeffs_3930_64bit));
}
memset(p->coeffsB, 0, sizeof(p->coeffsB));
+ memset(p64->coeffsB, 0, sizeof(p64->coeffsB));
if (ctx->fileversion < 3930) {
memcpy(p->coeffsB[0], initial_coeffs_b_3800,
sizeof(initial_coeffs_b_3800));
p->filterB[0] = p->filterB[1] = 0;
p->lastA[0] = p->lastA[1] = 0;
+ p64->filterA[0] = p64->filterA[1] = 0;
+ p64->filterB[0] = p64->filterB[1] = 0;
+ p64->lastA[0] = p64->lastA[1] = 0;
+
p->sample_pos = 0;
+
+ p64->sample_pos = 0;
}
/** Get inverse sign of integer (-1 for positive, 1 for negative and 0 for zero) */
p->coeffsB[filter][1] -= (((d4 >> 30) & 2) - 1) * sign;
p->filterB[filter] = p->lastA[filter] + (predictionB >> shift);
- p->filterA[filter] = p->filterB[filter] + ((int)(p->filterA[filter] * 31U) >> 5);
+ p->filterA[filter] = p->filterB[filter] + (unsigned)((int)(p->filterA[filter] * 31U) >> 5);
return p->filterA[filter];
}
{
int i, j;
int32_t dotprod, sign;
- int32_t coeffs[8] = { 0 }, delay[8] = { 0 };
+ int32_t delay[8] = { 0 };
+ uint32_t coeffs[8] = { 0 };
for (i = 0; i < length; i++) {
dotprod = 0;
d3 * p->coeffsA[filter][3];
p->lastA[filter] = decoded + (predictionA >> 9);
- p->filterA[filter] = p->lastA[filter] + ((p->filterA[filter] * 31) >> 5);
+ p->filterA[filter] = p->lastA[filter] + ((int)(p->filterA[filter] * 31U) >> 5);
sign = APESIGN(decoded);
p->coeffsA[filter][0] += ((d0 < 0) * 2 - 1) * sign;
}
}
-static av_always_inline int predictor_update_filter(APEPredictor *p,
+static av_always_inline int predictor_update_filter(APEPredictor64 *p,
const int decoded, const int filter,
const int delayA, const int delayB,
const int adaptA, const int adaptB)
{
- int32_t predictionA, predictionB, sign;
+ int64_t predictionA, predictionB;
+ int32_t sign;
p->buf[delayA] = p->lastA[filter];
p->buf[adaptA] = APESIGN(p->buf[delayA]);
- p->buf[delayA - 1] = p->buf[delayA] - (unsigned)p->buf[delayA - 1];
+ p->buf[delayA - 1] = p->buf[delayA] - (uint64_t)p->buf[delayA - 1];
p->buf[adaptA - 1] = APESIGN(p->buf[delayA - 1]);
predictionA = p->buf[delayA ] * p->coeffsA[filter][0] +
p->buf[delayA - 3] * p->coeffsA[filter][3];
/* Apply a scaled first-order filter compression */
- p->buf[delayB] = p->filterA[filter ^ 1] - ((int)(p->filterB[filter] * 31U) >> 5);
+ p->buf[delayB] = p->filterA[filter ^ 1] - ((int64_t)(p->filterB[filter] * 31ULL) >> 5);
p->buf[adaptB] = APESIGN(p->buf[delayB]);
- p->buf[delayB - 1] = p->buf[delayB] - (unsigned)p->buf[delayB - 1];
+ p->buf[delayB - 1] = p->buf[delayB] - (uint64_t)p->buf[delayB - 1];
p->buf[adaptB - 1] = APESIGN(p->buf[delayB - 1]);
p->filterB[filter] = p->filterA[filter ^ 1];
p->buf[delayB - 3] * p->coeffsB[filter][3] +
p->buf[delayB - 4] * p->coeffsB[filter][4];
- p->lastA[filter] = decoded + ((int)((unsigned)predictionA + (predictionB >> 1)) >> 10);
- p->filterA[filter] = p->lastA[filter] + ((int)(p->filterA[filter] * 31U) >> 5);
+ p->lastA[filter] = decoded + ((int64_t)((uint64_t)predictionA + (predictionB >> 1)) >> 10);
+ p->filterA[filter] = p->lastA[filter] + ((int64_t)(p->filterA[filter] * 31ULL) >> 5);
sign = APESIGN(decoded);
p->coeffsA[filter][0] += p->buf[adaptA ] * sign;
static void predictor_decode_stereo_3950(APEContext *ctx, int count)
{
- APEPredictor *p = &ctx->predictor;
+ APEPredictor64 *p = &ctx->predictor64;
int32_t *decoded0 = ctx->decoded[0];
int32_t *decoded1 = ctx->decoded[1];
static void predictor_decode_mono_3950(APEContext *ctx, int count)
{
- APEPredictor *p = &ctx->predictor;
+ APEPredictor64 *p = &ctx->predictor64;
int32_t *decoded0 = ctx->decoded[0];
int32_t predictionA, currentA, A, sign;
A = *decoded0;
p->buf[YDELAYA] = currentA;
- p->buf[YDELAYA - 1] = p->buf[YDELAYA] - p->buf[YDELAYA - 1];
+ p->buf[YDELAYA - 1] = p->buf[YDELAYA] - (uint64_t)p->buf[YDELAYA - 1];
predictionA = p->buf[YDELAYA ] * p->coeffsA[0][0] +
p->buf[YDELAYA - 1] * p->coeffsA[0][1] +
p->buf[YDELAYA - 2] * p->coeffsA[0][2] +
p->buf[YDELAYA - 3] * p->coeffsA[0][3];
- currentA = A + (predictionA >> 10);
+ currentA = A + (uint64_t)(predictionA >> 10);
p->buf[YADAPTCOEFFSA] = APESIGN(p->buf[YDELAYA ]);
p->buf[YADAPTCOEFFSA - 1] = APESIGN(p->buf[YDELAYA - 1]);
p->buf = p->historybuffer;
}
- p->filterA[0] = currentA + ((int)(p->filterA[0] * 31U) >> 5);
+ p->filterA[0] = currentA + (uint64_t)((int64_t)(p->filterA[0] * 31U) >> 5);
*(decoded0++) = p->filterA[0];
}
int32_t *data, int count, int order, int fracbits)
{
int res;
- int absres;
+ unsigned absres;
while (count--) {
/* round fixedpoint scalar product */
f->delay - order,
f->adaptcoeffs - order,
order, APESIGN(*data));
- res = (int)(res + (1U << (fracbits - 1))) >> fracbits;
- res += *data;
+ res = (int64_t)(res + (1LL << (fracbits - 1))) >> fracbits;
+ res += (unsigned)*data;
*data++ = res;
/* Update the output history */
/* Version 3.98 and later files */
/* Update the adaption coefficients */
- absres = res < 0 ? -(unsigned)res : res;
+ absres = FFABSU(res);
if (absres)
*f->adaptcoeffs = APESIGN(res) *
(8 << ((absres > f->avg * 3) + (absres > f->avg * 4 / 3)));
else
*f->adaptcoeffs = 0;
- f->avg += (absres - f->avg) / 16;
+ f->avg += (int)(absres - (unsigned)f->avg) / 16;
f->adaptcoeffs[-1] >>= 1;
f->adaptcoeffs[-2] >>= 1;
av_fast_malloc(&s->decoded_buffer, &s->decoded_size, decoded_buffer_size);
if (!s->decoded_buffer)
return AVERROR(ENOMEM);
- memset(s->decoded_buffer, 0, s->decoded_size);
+ memset(s->decoded_buffer, 0, decoded_buffer_size);
s->decoded[0] = s->decoded_buffer;
s->decoded[1] = s->decoded_buffer + FFALIGN(blockstodecode, 8);
for (ch = 0; ch < s->channels; ch++) {
sample24 = (int32_t *)frame->data[ch];
for (i = 0; i < blockstodecode; i++)
- *sample24++ = s->decoded[ch][i] << 8;
+ *sample24++ = s->decoded[ch][i] * 256U;
}
break;
}
s->samples -= blockstodecode;
+ if (avctx->err_recognition & AV_EF_CRCCHECK &&
+ s->fileversion >= 3900 && s->bps < 24) {
+ uint32_t crc = s->CRC_state;
+ const AVCRC *crc_tab = av_crc_get_table(AV_CRC_32_IEEE_LE);
+ for (i = 0; i < blockstodecode; i++) {
+ for (ch = 0; ch < s->channels; ch++) {
+ uint8_t *smp = frame->data[ch] + (i*(s->bps >> 3));
+ crc = av_crc(crc_tab, crc, smp, s->bps >> 3);
+ }
+ }
+
+ if (!s->samples && (~crc >> 1) ^ s->CRC) {
+ av_log(avctx, AV_LOG_ERROR, "CRC mismatch! Previously decoded "
+ "frames may have been affected as well.\n");
+ if (avctx->err_recognition & AV_EF_EXPLODE)
+ return AVERROR_INVALIDDATA;
+ }
+
+ s->CRC_state = crc;
+ }
+
*got_frame_ptr = 1;
return !s->samples ? avpkt->size : 0;
.version = LIBAVUTIL_VERSION_INT,
};
-AVCodec ff_ape_decoder = {
+const AVCodec ff_ape_decoder = {
.name = "ape",
.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.decode = ape_decode_frame,
.capabilities = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DELAY |
AV_CODEC_CAP_DR1,
+ .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.flush = ape_flush,
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
AV_SAMPLE_FMT_S16P,
projects / ffmpeg / blobdiff