* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <inttypes.h>
+
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
+#include "apedsp.h"
#include "avcodec.h"
-#include "dsputil.h"
+#include "bswapdsp.h"
#include "bytestream.h"
#include "internal.h"
+#include "get_bits.h"
+#include "unary.h"
/**
* @file
int32_t coeffsA[2][4]; ///< adaption coefficients
int32_t coeffsB[2][5]; ///< adaption coefficients
int32_t historybuffer[HISTORY_SIZE + PREDICTOR_SIZE];
+
+ unsigned int sample_pos;
} APEPredictor;
/** Decoder context */
typedef struct APEContext {
AVClass *class; ///< class for AVOptions
AVCodecContext *avctx;
- DSPContext dsp;
+ BswapDSPContext bdsp;
+ APEDSPContext adsp;
int channels;
int samples; ///< samples left to decode in current frame
int bps;
APERice riceX; ///< rice code parameters for the second channel
APERice riceY; ///< rice code parameters for the first channel
APEFilter filters[APE_FILTER_LEVELS][2]; ///< filters used for reconstruction
+ GetBitContext gb;
uint8_t *data; ///< current frame data
uint8_t *data_end; ///< frame data end
static void ape_apply_filters(APEContext *ctx, int32_t *decoded0,
int32_t *decoded1, int count);
+static void entropy_decode_mono_0000(APEContext *ctx, int blockstodecode);
+static void entropy_decode_stereo_0000(APEContext *ctx, int blockstodecode);
+static void entropy_decode_mono_3860(APEContext *ctx, int blockstodecode);
+static void entropy_decode_stereo_3860(APEContext *ctx, int blockstodecode);
static void entropy_decode_mono_3900(APEContext *ctx, int blockstodecode);
static void entropy_decode_stereo_3900(APEContext *ctx, int blockstodecode);
+static void entropy_decode_stereo_3930(APEContext *ctx, int blockstodecode);
static void entropy_decode_mono_3990(APEContext *ctx, int blockstodecode);
static void entropy_decode_stereo_3990(APEContext *ctx, int blockstodecode);
+static void predictor_decode_mono_3800(APEContext *ctx, int count);
+static void predictor_decode_stereo_3800(APEContext *ctx, int count);
static void predictor_decode_mono_3930(APEContext *ctx, int count);
static void predictor_decode_stereo_3930(APEContext *ctx, int count);
static void predictor_decode_mono_3950(APEContext *ctx, int count);
static void predictor_decode_stereo_3950(APEContext *ctx, int count);
-// TODO: dsputilize
-
static av_cold int ape_decode_close(AVCodecContext *avctx)
{
APEContext *s = avctx->priv_data;
return 0;
}
+static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2,
+ const int16_t *v3,
+ int order, int mul)
+{
+ int res = 0;
+
+ while (order--) {
+ res += *v1 * *v2++;
+ *v1++ += mul * *v3++;
+ }
+ return res;
+}
+
static av_cold int ape_decode_init(AVCodecContext *avctx)
{
APEContext *s = avctx->priv_data;
av_log(avctx, AV_LOG_DEBUG, "Compression Level: %d - Flags: %d\n",
s->compression_level, s->flags);
- if (s->compression_level % 1000 || s->compression_level > COMPRESSION_LEVEL_INSANE) {
+ if (s->compression_level % 1000 || s->compression_level > COMPRESSION_LEVEL_INSANE ||
+ (s->fileversion < 3930 && s->compression_level == COMPRESSION_LEVEL_INSANE)) {
av_log(avctx, AV_LOG_ERROR, "Incorrect compression level %d\n",
s->compression_level);
return AVERROR_INVALIDDATA;
filter_alloc_fail);
}
- if (s->fileversion < 3990) {
+ if (s->fileversion < 3860) {
+ s->entropy_decode_mono = entropy_decode_mono_0000;
+ s->entropy_decode_stereo = entropy_decode_stereo_0000;
+ } else if (s->fileversion < 3900) {
+ s->entropy_decode_mono = entropy_decode_mono_3860;
+ s->entropy_decode_stereo = entropy_decode_stereo_3860;
+ } else if (s->fileversion < 3930) {
s->entropy_decode_mono = entropy_decode_mono_3900;
s->entropy_decode_stereo = entropy_decode_stereo_3900;
+ } else if (s->fileversion < 3990) {
+ s->entropy_decode_mono = entropy_decode_mono_3900;
+ s->entropy_decode_stereo = entropy_decode_stereo_3930;
} else {
s->entropy_decode_mono = entropy_decode_mono_3990;
s->entropy_decode_stereo = entropy_decode_stereo_3990;
}
- if (s->fileversion < 3950) {
+ if (s->fileversion < 3930) {
+ s->predictor_decode_mono = predictor_decode_mono_3800;
+ s->predictor_decode_stereo = predictor_decode_stereo_3800;
+ } else if (s->fileversion < 3950) {
s->predictor_decode_mono = predictor_decode_mono_3930;
s->predictor_decode_stereo = predictor_decode_stereo_3930;
} else {
s->predictor_decode_stereo = predictor_decode_stereo_3950;
}
- ff_dsputil_init(&s->dsp, avctx);
+ s->adsp.scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c;
+
+ if (ARCH_ARM)
+ ff_apedsp_init_arm(&s->adsp);
+ if (ARCH_PPC)
+ ff_apedsp_init_ppc(&s->adsp);
+ if (ARCH_X86)
+ ff_apedsp_init_x86(&s->adsp);
+
+ ff_bswapdsp_init(&s->bdsp);
avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
return 0;
rice->k++;
}
+static inline int get_rice_ook(GetBitContext *gb, int k)
+{
+ unsigned int x;
+
+ x = get_unary(gb, 1, get_bits_left(gb));
+
+ if (k)
+ x = (x << k) | get_bits(gb, k);
+
+ return x;
+}
+
+static inline int ape_decode_value_3860(APEContext *ctx, GetBitContext *gb,
+ APERice *rice)
+{
+ unsigned int x, overflow;
+
+ overflow = get_unary(gb, 1, get_bits_left(gb));
+
+ if (ctx->fileversion > 3880) {
+ while (overflow >= 16) {
+ overflow -= 16;
+ rice->k += 4;
+ }
+ }
+
+ if (!rice->k)
+ x = overflow;
+ else
+ x = (overflow << rice->k) + get_bits(gb, rice->k);
+
+ rice->ksum += x - (rice->ksum + 8 >> 4);
+ if (rice->ksum < (rice->k ? 1 << (rice->k + 4) : 0))
+ rice->k--;
+ else if (rice->ksum >= (1 << (rice->k + 5)) && rice->k < 24)
+ rice->k++;
+
+ /* Convert to signed */
+ if (x & 1)
+ return (x >> 1) + 1;
+ else
+ return -(x >> 1);
+}
+
static inline int ape_decode_value_3900(APEContext *ctx, APERice *rice)
{
unsigned int x, overflow;
} else
tmpk = (rice->k < 1) ? 0 : rice->k - 1;
- if (tmpk <= 16)
+ if (tmpk <= 16 || ctx->fileversion < 3910)
x = range_decode_bits(ctx, tmpk);
else if (tmpk <= 32) {
x = range_decode_bits(ctx, 16);
return -(x >> 1);
}
+static void decode_array_0000(APEContext *ctx, GetBitContext *gb,
+ int32_t *out, APERice *rice, int blockstodecode)
+{
+ int i;
+ int ksummax, ksummin;
+
+ rice->ksum = 0;
+ for (i = 0; i < FFMIN(blockstodecode, 5); i++) {
+ out[i] = get_rice_ook(&ctx->gb, 10);
+ rice->ksum += out[i];
+ }
+ rice->k = av_log2(rice->ksum / 10) + 1;
+ 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;
+ }
+ ksummax = 1 << rice->k + 7;
+ ksummin = rice->k ? (1 << rice->k + 6) : 0;
+ for (; i < blockstodecode; i++) {
+ out[i] = get_rice_ook(&ctx->gb, rice->k);
+ rice->ksum += out[i] - out[i - 64];
+ while (rice->ksum < ksummin) {
+ rice->k--;
+ ksummin = rice->k ? ksummin >> 1 : 0;
+ ksummax >>= 1;
+ }
+ while (rice->ksum >= ksummax) {
+ rice->k++;
+ if (rice->k > 24)
+ return;
+ ksummax <<= 1;
+ ksummin = ksummin ? ksummin << 1 : 128;
+ }
+ }
+
+ for (i = 0; i < blockstodecode; i++) {
+ if (out[i] & 1)
+ out[i] = (out[i] >> 1) + 1;
+ else
+ out[i] = -(out[i] >> 1);
+ }
+}
+
+static void entropy_decode_mono_0000(APEContext *ctx, int blockstodecode)
+{
+ decode_array_0000(ctx, &ctx->gb, ctx->decoded[0], &ctx->riceY,
+ blockstodecode);
+}
+
+static void entropy_decode_stereo_0000(APEContext *ctx, int blockstodecode)
+{
+ decode_array_0000(ctx, &ctx->gb, ctx->decoded[0], &ctx->riceY,
+ blockstodecode);
+ decode_array_0000(ctx, &ctx->gb, ctx->decoded[1], &ctx->riceX,
+ blockstodecode);
+}
+
+static void entropy_decode_mono_3860(APEContext *ctx, int blockstodecode)
+{
+ int32_t *decoded0 = ctx->decoded[0];
+
+ while (blockstodecode--)
+ *decoded0++ = ape_decode_value_3860(ctx, &ctx->gb, &ctx->riceY);
+}
+
+static void entropy_decode_stereo_3860(APEContext *ctx, int blockstodecode)
+{
+ int32_t *decoded0 = ctx->decoded[0];
+ int32_t *decoded1 = ctx->decoded[1];
+ int blocks = blockstodecode;
+
+ while (blockstodecode--)
+ *decoded0++ = ape_decode_value_3860(ctx, &ctx->gb, &ctx->riceY);
+ while (blocks--)
+ *decoded1++ = ape_decode_value_3860(ctx, &ctx->gb, &ctx->riceX);
+}
+
static void entropy_decode_mono_3900(APEContext *ctx, int blockstodecode)
{
int32_t *decoded0 = ctx->decoded[0];
}
static void entropy_decode_stereo_3900(APEContext *ctx, int blockstodecode)
+{
+ int32_t *decoded0 = ctx->decoded[0];
+ int32_t *decoded1 = ctx->decoded[1];
+ int blocks = blockstodecode;
+
+ while (blockstodecode--)
+ *decoded0++ = ape_decode_value_3900(ctx, &ctx->riceY);
+ range_dec_normalize(ctx);
+ // because of some implementation peculiarities we need to backpedal here
+ ctx->ptr -= 1;
+ range_start_decoding(ctx);
+ while (blocks--)
+ *decoded1++ = ape_decode_value_3900(ctx, &ctx->riceX);
+}
+
+static void entropy_decode_stereo_3930(APEContext *ctx, int blockstodecode)
{
int32_t *decoded0 = ctx->decoded[0];
int32_t *decoded1 = ctx->decoded[1];
static int init_entropy_decoder(APEContext *ctx)
{
/* Read the CRC */
- if (ctx->data_end - ctx->ptr < 6)
- return AVERROR_INVALIDDATA;
- ctx->CRC = bytestream_get_be32(&ctx->ptr);
+ if (ctx->fileversion >= 3900) {
+ if (ctx->data_end - ctx->ptr < 6)
+ return AVERROR_INVALIDDATA;
+ ctx->CRC = bytestream_get_be32(&ctx->ptr);
+ } else {
+ ctx->CRC = get_bits_long(&ctx->gb, 32);
+ }
/* Read the frame flags if they exist */
ctx->frameflags = 0;
ctx->riceY.k = 10;
ctx->riceY.ksum = (1 << ctx->riceY.k) * 16;
- /* The first 8 bits of input are ignored. */
- ctx->ptr++;
+ if (ctx->fileversion >= 3900) {
+ /* The first 8 bits of input are ignored. */
+ ctx->ptr++;
- range_start_decoding(ctx);
+ range_start_decoding(ctx);
+ }
return 0;
}
-static const int32_t initial_coeffs[4] = {
+static const int32_t initial_coeffs_fast_3320[1] = {
+ 375,
+};
+
+static const int32_t initial_coeffs_a_3800[3] = {
+ 64, 115, 64,
+};
+
+static const int32_t initial_coeffs_b_3800[2] = {
+ 740, 0
+};
+
+static const int32_t initial_coeffs_3930[4] = {
360, 317, -109, 98
};
p->buf = p->historybuffer;
/* Initialize and zero the coefficients */
- memcpy(p->coeffsA[0], initial_coeffs, sizeof(initial_coeffs));
- memcpy(p->coeffsA[1], initial_coeffs, sizeof(initial_coeffs));
+ if (ctx->fileversion < 3930) {
+ if (ctx->compression_level == COMPRESSION_LEVEL_FAST) {
+ memcpy(p->coeffsA[0], initial_coeffs_fast_3320,
+ sizeof(initial_coeffs_fast_3320));
+ memcpy(p->coeffsA[1], initial_coeffs_fast_3320,
+ sizeof(initial_coeffs_fast_3320));
+ } else {
+ memcpy(p->coeffsA[0], initial_coeffs_a_3800,
+ sizeof(initial_coeffs_a_3800));
+ memcpy(p->coeffsA[1], initial_coeffs_a_3800,
+ sizeof(initial_coeffs_a_3800));
+ }
+ } else {
+ memcpy(p->coeffsA[0], initial_coeffs_3930, sizeof(initial_coeffs_3930));
+ memcpy(p->coeffsA[1], initial_coeffs_3930, sizeof(initial_coeffs_3930));
+ }
memset(p->coeffsB, 0, sizeof(p->coeffsB));
+ if (ctx->fileversion < 3930) {
+ memcpy(p->coeffsB[0], initial_coeffs_b_3800,
+ sizeof(initial_coeffs_b_3800));
+ memcpy(p->coeffsB[1], initial_coeffs_b_3800,
+ sizeof(initial_coeffs_b_3800));
+ }
p->filterA[0] = p->filterA[1] = 0;
p->filterB[0] = p->filterB[1] = 0;
p->lastA[0] = p->lastA[1] = 0;
+
+ p->sample_pos = 0;
}
/** Get inverse sign of integer (-1 for positive, 1 for negative and 0 for zero) */
return (x < 0) - (x > 0);
}
+static av_always_inline int filter_fast_3320(APEPredictor *p,
+ const int decoded, const int filter,
+ const int delayA)
+{
+ int32_t predictionA;
+
+ p->buf[delayA] = p->lastA[filter];
+ if (p->sample_pos < 3) {
+ p->lastA[filter] = decoded;
+ p->filterA[filter] = decoded;
+ return decoded;
+ }
+
+ predictionA = p->buf[delayA] * 2 - p->buf[delayA - 1];
+ p->lastA[filter] = decoded + (predictionA * p->coeffsA[filter][0] >> 9);
+
+ if ((decoded ^ predictionA) > 0)
+ p->coeffsA[filter][0]++;
+ else
+ p->coeffsA[filter][0]--;
+
+ p->filterA[filter] += p->lastA[filter];
+
+ return p->filterA[filter];
+}
+
+static av_always_inline int filter_3800(APEPredictor *p,
+ const int decoded, const int filter,
+ const int delayA, const int delayB,
+ const int start, const int shift)
+{
+ int32_t predictionA, predictionB, sign;
+ int32_t d0, d1, d2, d3, d4;
+
+ p->buf[delayA] = p->lastA[filter];
+ p->buf[delayB] = p->filterB[filter];
+ if (p->sample_pos < start) {
+ predictionA = decoded + p->filterA[filter];
+ p->lastA[filter] = decoded;
+ p->filterB[filter] = decoded;
+ p->filterA[filter] = predictionA;
+ return predictionA;
+ }
+ d2 = p->buf[delayA];
+ d1 = (p->buf[delayA] - p->buf[delayA - 1]) << 1;
+ d0 = p->buf[delayA] + ((p->buf[delayA - 2] - p->buf[delayA - 1]) << 3);
+ d3 = p->buf[delayB] * 2 - p->buf[delayB - 1];
+ d4 = p->buf[delayB];
+
+ predictionA = d0 * p->coeffsA[filter][0] +
+ d1 * p->coeffsA[filter][1] +
+ d2 * p->coeffsA[filter][2];
+
+ sign = APESIGN(decoded);
+ p->coeffsA[filter][0] += (((d0 >> 30) & 2) - 1) * sign;
+ p->coeffsA[filter][1] += (((d1 >> 28) & 8) - 4) * sign;
+ p->coeffsA[filter][2] += (((d2 >> 28) & 8) - 4) * sign;
+
+ predictionB = d3 * p->coeffsB[filter][0] -
+ d4 * p->coeffsB[filter][1];
+ p->lastA[filter] = decoded + (predictionA >> 11);
+ sign = APESIGN(p->lastA[filter]);
+ p->coeffsB[filter][0] += (((d3 >> 29) & 4) - 2) * sign;
+ p->coeffsB[filter][1] -= (((d4 >> 30) & 2) - 1) * sign;
+
+ p->filterB[filter] = p->lastA[filter] + (predictionB >> shift);
+ p->filterA[filter] = p->filterB[filter] + ((p->filterA[filter] * 31) >> 5);
+
+ return p->filterA[filter];
+}
+
+static void long_filter_high_3800(int32_t *buffer, int order, int shift,
+ int32_t *coeffs, int32_t *delay, int length)
+{
+ int i, j;
+ int32_t dotprod, sign;
+
+ memset(coeffs, 0, order * sizeof(*coeffs));
+ for (i = 0; i < order; i++)
+ delay[i] = buffer[i];
+ for (i = order; i < length; i++) {
+ dotprod = 0;
+ sign = APESIGN(buffer[i]);
+ for (j = 0; j < order; j++) {
+ dotprod += delay[j] * coeffs[j];
+ coeffs[j] -= (((delay[j] >> 30) & 2) - 1) * sign;
+ }
+ buffer[i] -= dotprod >> shift;
+ for (j = 0; j < order - 1; j++)
+ delay[j] = delay[j + 1];
+ delay[order - 1] = buffer[i];
+ }
+}
+
+static void long_filter_ehigh_3830(int32_t *buffer, int length)
+{
+ int i, j;
+ int32_t dotprod, sign;
+ int32_t coeffs[8] = { 0 }, delay[8] = { 0 };
+
+ for (i = 0; i < length; i++) {
+ dotprod = 0;
+ sign = APESIGN(buffer[i]);
+ for (j = 7; j >= 0; j--) {
+ dotprod += delay[j] * coeffs[j];
+ coeffs[j] -= (((delay[j] >> 30) & 2) - 1) * sign;
+ }
+ for (j = 7; j > 0; j--)
+ delay[j] = delay[j - 1];
+ delay[0] = buffer[i];
+ buffer[i] -= dotprod >> 9;
+ }
+}
+
+static void predictor_decode_stereo_3800(APEContext *ctx, int count)
+{
+ APEPredictor *p = &ctx->predictor;
+ int32_t *decoded0 = ctx->decoded[0];
+ int32_t *decoded1 = ctx->decoded[1];
+ int32_t coeffs[256], delay[256];
+ int start = 4, shift = 10;
+
+ if (ctx->compression_level == COMPRESSION_LEVEL_HIGH) {
+ start = 16;
+ long_filter_high_3800(decoded0, 16, 9, coeffs, delay, count);
+ long_filter_high_3800(decoded1, 16, 9, coeffs, delay, count);
+ } else if (ctx->compression_level == COMPRESSION_LEVEL_EXTRA_HIGH) {
+ int order = 128, shift2 = 11;
+
+ if (ctx->fileversion >= 3830) {
+ order <<= 1;
+ shift++;
+ shift2++;
+ long_filter_ehigh_3830(decoded0 + order, count - order);
+ long_filter_ehigh_3830(decoded1 + order, count - order);
+ }
+ start = order;
+ long_filter_high_3800(decoded0, order, shift2, coeffs, delay, count);
+ long_filter_high_3800(decoded1, order, shift2, coeffs, delay, count);
+ }
+
+ while (count--) {
+ int X = *decoded0, Y = *decoded1;
+ if (ctx->compression_level == COMPRESSION_LEVEL_FAST) {
+ *decoded0 = filter_fast_3320(p, Y, 0, YDELAYA);
+ decoded0++;
+ *decoded1 = filter_fast_3320(p, X, 1, XDELAYA);
+ decoded1++;
+ } else {
+ *decoded0 = filter_3800(p, Y, 0, YDELAYA, YDELAYB,
+ start, shift);
+ decoded0++;
+ *decoded1 = filter_3800(p, X, 1, XDELAYA, XDELAYB,
+ start, shift);
+ decoded1++;
+ }
+
+ /* Combined */
+ p->buf++;
+ p->sample_pos++;
+
+ /* Have we filled the history buffer? */
+ if (p->buf == p->historybuffer + HISTORY_SIZE) {
+ memmove(p->historybuffer, p->buf,
+ PREDICTOR_SIZE * sizeof(*p->historybuffer));
+ p->buf = p->historybuffer;
+ }
+ }
+}
+
+static void predictor_decode_mono_3800(APEContext *ctx, int count)
+{
+ APEPredictor *p = &ctx->predictor;
+ int32_t *decoded0 = ctx->decoded[0];
+ int32_t coeffs[256], delay[256];
+ int start = 4, shift = 10;
+
+ if (ctx->compression_level == COMPRESSION_LEVEL_HIGH) {
+ start = 16;
+ long_filter_high_3800(decoded0, 16, 9, coeffs, delay, count);
+ } else if (ctx->compression_level == COMPRESSION_LEVEL_EXTRA_HIGH) {
+ int order = 128, shift2 = 11;
+
+ if (ctx->fileversion >= 3830) {
+ order <<= 1;
+ shift++;
+ shift2++;
+ long_filter_ehigh_3830(decoded0 + order, count - order);
+ }
+ start = order;
+ long_filter_high_3800(decoded0, order, shift2, coeffs, delay, count);
+ }
+
+ while (count--) {
+ if (ctx->compression_level == COMPRESSION_LEVEL_FAST) {
+ *decoded0 = filter_fast_3320(p, *decoded0, 0, YDELAYA);
+ decoded0++;
+ } else {
+ *decoded0 = filter_3800(p, *decoded0, 0, YDELAYA, YDELAYB,
+ start, shift);
+ decoded0++;
+ }
+
+ /* Combined */
+ p->buf++;
+ p->sample_pos++;
+
+ /* Have we filled the history buffer? */
+ if (p->buf == p->historybuffer + HISTORY_SIZE) {
+ memmove(p->historybuffer, p->buf,
+ PREDICTOR_SIZE * sizeof(*p->historybuffer));
+ p->buf = p->historybuffer;
+ }
+ }
+}
+
static av_always_inline int predictor_update_3930(APEPredictor *p,
const int decoded, const int filter,
const int delayA)
while (count--) {
/* round fixedpoint scalar product */
- res = ctx->dsp.scalarproduct_and_madd_int16(f->coeffs, f->delay - order,
- f->adaptcoeffs - order,
- order, APESIGN(*data));
+ res = ctx->adsp.scalarproduct_and_madd_int16(f->coeffs,
+ f->delay - order,
+ f->adaptcoeffs - order,
+ order, APESIGN(*data));
res = (res + (1 << (fracbits - 1))) >> fracbits;
res += *data;
*data++ = res;
int32_t *sample24;
int i, ch, ret;
int blockstodecode;
- int bytes_used = 0;
/* this should never be negative, but bad things will happen if it is, so
check it just to make sure. */
av_fast_malloc(&s->data, &s->data_size, buf_size);
if (!s->data)
return AVERROR(ENOMEM);
- s->dsp.bswap_buf((uint32_t*)s->data, (const uint32_t*)buf, buf_size >> 2);
+ s->bdsp.bswap_buf((uint32_t *) s->data, (const uint32_t *) buf,
+ buf_size >> 2);
memset(s->data + (buf_size & ~3), 0, buf_size & 3);
s->ptr = s->data;
s->data_end = s->data + buf_size;
nblocks = bytestream_get_be32(&s->ptr);
offset = bytestream_get_be32(&s->ptr);
- if (offset > 3) {
- av_log(avctx, AV_LOG_ERROR, "Incorrect offset passed\n");
- s->data = NULL;
- return AVERROR_INVALIDDATA;
- }
- if (s->data_end - s->ptr < offset) {
- av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
- return AVERROR_INVALIDDATA;
+ if (s->fileversion >= 3900) {
+ if (offset > 3) {
+ av_log(avctx, AV_LOG_ERROR, "Incorrect offset passed\n");
+ s->data = NULL;
+ return AVERROR_INVALIDDATA;
+ }
+ if (s->data_end - s->ptr < offset) {
+ av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+ s->ptr += offset;
+ } else {
+ init_get_bits(&s->gb, s->ptr, (s->data_end - s->ptr) * 8);
+ if (s->fileversion > 3800)
+ skip_bits_long(&s->gb, offset * 8);
+ else
+ skip_bits_long(&s->gb, offset);
}
- s->ptr += offset;
if (!nblocks || nblocks > INT_MAX) {
- av_log(avctx, AV_LOG_ERROR, "Invalid sample count: %u.\n", nblocks);
+ av_log(avctx, AV_LOG_ERROR, "Invalid sample count: %"PRIu32".\n",
+ nblocks);
return AVERROR_INVALIDDATA;
}
s->samples = nblocks;
return AVERROR_INVALIDDATA;
}
- bytes_used = avpkt->size;
}
if (!s->data) {
}
blockstodecode = FFMIN(s->blocks_per_loop, s->samples);
+ // for old files coefficients were not interleaved,
+ // so we need to decode all of them at once
+ if (s->fileversion < 3930)
+ blockstodecode = s->samples;
/* reallocate decoded sample buffer if needed */
av_fast_malloc(&s->decoded_buffer, &s->decoded_size,
*got_frame_ptr = 1;
- return bytes_used;
+ return (s->samples == 0) ? avpkt->size : 0;
}
static void ape_flush(AVCodecContext *avctx)
AVCodec ff_ape_decoder = {
.name = "ape",
+ .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_APE,
.priv_data_size = sizeof(APEContext),
.decode = ape_decode_frame,
.capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DELAY | CODEC_CAP_DR1,
.flush = ape_flush,
- .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
AV_SAMPLE_FMT_S16P,
AV_SAMPLE_FMT_S32P,
projects / ffmpeg / blobdiff