chasing indexing error

1 files changed, 0 insertions, 649 deletions

diff --git a/ffmpeg/libavcodec/alacenc.c b/ffmpeg/libavcodec/alacenc.c
deleted file mode 100644
index bc68a06..0000000
--- a/ffmpeg/libavcodec/alacenc.c
+++ /dev/null
@@ -1,649 +0,0 @@
-/*
- * ALAC audio encoder
- * Copyright (c) 2008  Jaikrishnan Menon <realityman@gmx.net>
- *
- * This file is part of FFmpeg.
- *
- * 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.
- *
- * 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "avcodec.h"
-#include "put_bits.h"
-#include "internal.h"
-#include "lpc.h"
-#include "mathops.h"
-#include "alac_data.h"
-
-#define DEFAULT_FRAME_SIZE        4096
-#define ALAC_EXTRADATA_SIZE       36
-#define ALAC_FRAME_HEADER_SIZE    55
-#define ALAC_FRAME_FOOTER_SIZE    3
-
-#define ALAC_ESCAPE_CODE          0x1FF
-#define ALAC_MAX_LPC_ORDER        30
-#define DEFAULT_MAX_PRED_ORDER    6
-#define DEFAULT_MIN_PRED_ORDER    4
-#define ALAC_MAX_LPC_PRECISION    9
-#define ALAC_MAX_LPC_SHIFT        9
-
-#define ALAC_CHMODE_LEFT_RIGHT    0
-#define ALAC_CHMODE_LEFT_SIDE     1
-#define ALAC_CHMODE_RIGHT_SIDE    2
-#define ALAC_CHMODE_MID_SIDE      3
-
-typedef struct RiceContext {
-    int history_mult;
-    int initial_history;
-    int k_modifier;
-    int rice_modifier;
-} RiceContext;
-
-typedef struct AlacLPCContext {
-    int lpc_order;
-    int lpc_coeff[ALAC_MAX_LPC_ORDER+1];
-    int lpc_quant;
-} AlacLPCContext;
-
-typedef struct AlacEncodeContext {
-    int frame_size;                     /**< current frame size               */
-    int verbatim;                       /**< current frame verbatim mode flag */
-    int compression_level;
-    int min_prediction_order;
-    int max_prediction_order;
-    int max_coded_frame_size;
-    int write_sample_size;
-    int extra_bits;
-    int32_t sample_buf[2][DEFAULT_FRAME_SIZE];
-    int32_t predictor_buf[DEFAULT_FRAME_SIZE];
-    int interlacing_shift;
-    int interlacing_leftweight;
-    PutBitContext pbctx;
-    RiceContext rc;
-    AlacLPCContext lpc[2];
-    LPCContext lpc_ctx;
-    AVCodecContext *avctx;
-} AlacEncodeContext;
-
-
-static void init_sample_buffers(AlacEncodeContext *s, int channels,
-                                uint8_t const *samples[2])
-{
-    int ch, i;
-    int shift = av_get_bytes_per_sample(s->avctx->sample_fmt) * 8 -
-                s->avctx->bits_per_raw_sample;
-
-#define COPY_SAMPLES(type) do {                             \
-        for (ch = 0; ch < channels; ch++) {                 \
-            int32_t       *bptr = s->sample_buf[ch];        \
-            const type *sptr = (const type *)samples[ch];   \
-            for (i = 0; i < s->frame_size; i++)             \
-                bptr[i] = sptr[i] >> shift;                 \
-        }                                                   \
-    } while (0)
-
-    if (s->avctx->sample_fmt == AV_SAMPLE_FMT_S32P)
-        COPY_SAMPLES(int32_t);
-    else
-        COPY_SAMPLES(int16_t);
-}
-
-static void encode_scalar(AlacEncodeContext *s, int x,
-                          int k, int write_sample_size)
-{
-    int divisor, q, r;
-
-    k = FFMIN(k, s->rc.k_modifier);
-    divisor = (1<<k) - 1;
-    q = x / divisor;
-    r = x % divisor;
-
-    if (q > 8) {
-        // write escape code and sample value directly
-        put_bits(&s->pbctx, 9, ALAC_ESCAPE_CODE);
-        put_bits(&s->pbctx, write_sample_size, x);
-    } else {
-        if (q)
-            put_bits(&s->pbctx, q, (1<<q) - 1);
-        put_bits(&s->pbctx, 1, 0);
-
-        if (k != 1) {
-            if (r > 0)
-                put_bits(&s->pbctx, k, r+1);
-            else
-                put_bits(&s->pbctx, k-1, 0);
-        }
-    }
-}
-
-static void write_element_header(AlacEncodeContext *s,
-                                 enum AlacRawDataBlockType element,
-                                 int instance)
-{
-    int encode_fs = 0;
-
-    if (s->frame_size < DEFAULT_FRAME_SIZE)
-        encode_fs = 1;
-
-    put_bits(&s->pbctx, 3,  element);               // element type
-    put_bits(&s->pbctx, 4,  instance);              // element instance
-    put_bits(&s->pbctx, 12, 0);                     // unused header bits
-    put_bits(&s->pbctx, 1,  encode_fs);             // Sample count is in the header
-    put_bits(&s->pbctx, 2,  s->extra_bits >> 3);    // Extra bytes (for 24-bit)
-    put_bits(&s->pbctx, 1,  s->verbatim);           // Audio block is verbatim
-    if (encode_fs)
-        put_bits32(&s->pbctx, s->frame_size);       // No. of samples in the frame
-}
-
-static void calc_predictor_params(AlacEncodeContext *s, int ch)
-{
-    int32_t coefs[MAX_LPC_ORDER][MAX_LPC_ORDER];
-    int shift[MAX_LPC_ORDER];
-    int opt_order;
-
-    if (s->compression_level == 1) {
-        s->lpc[ch].lpc_order = 6;
-        s->lpc[ch].lpc_quant = 6;
-        s->lpc[ch].lpc_coeff[0] =  160;
-        s->lpc[ch].lpc_coeff[1] = -190;
-        s->lpc[ch].lpc_coeff[2] =  170;
-        s->lpc[ch].lpc_coeff[3] = -130;
-        s->lpc[ch].lpc_coeff[4] =   80;
-        s->lpc[ch].lpc_coeff[5] =  -25;
-    } else {
-        opt_order = ff_lpc_calc_coefs(&s->lpc_ctx, s->sample_buf[ch],
-                                      s->frame_size,
-                                      s->min_prediction_order,
-                                      s->max_prediction_order,
-                                      ALAC_MAX_LPC_PRECISION, coefs, shift,
-                                      FF_LPC_TYPE_LEVINSON, 0,
-                                      ORDER_METHOD_EST, ALAC_MAX_LPC_SHIFT, 1);
-
-        s->lpc[ch].lpc_order = opt_order;
-        s->lpc[ch].lpc_quant = shift[opt_order-1];
-        memcpy(s->lpc[ch].lpc_coeff, coefs[opt_order-1], opt_order*sizeof(int));
-    }
-}
-
-static int estimate_stereo_mode(int32_t *left_ch, int32_t *right_ch, int n)
-{
-    int i, best;
-    int32_t lt, rt;
-    uint64_t sum[4];
-    uint64_t score[4];
-
-    /* calculate sum of 2nd order residual for each channel */
-    sum[0] = sum[1] = sum[2] = sum[3] = 0;
-    for (i = 2; i < n; i++) {
-        lt =  left_ch[i] - 2 *  left_ch[i - 1] +  left_ch[i - 2];
-        rt = right_ch[i] - 2 * right_ch[i - 1] + right_ch[i - 2];
-        sum[2] += FFABS((lt + rt) >> 1);
-        sum[3] += FFABS(lt - rt);
-        sum[0] += FFABS(lt);
-        sum[1] += FFABS(rt);
-    }
-
-    /* calculate score for each mode */
-    score[0] = sum[0] + sum[1];
-    score[1] = sum[0] + sum[3];
-    score[2] = sum[1] + sum[3];
-    score[3] = sum[2] + sum[3];
-
-    /* return mode with lowest score */
-    best = 0;
-    for (i = 1; i < 4; i++) {
-        if (score[i] < score[best])
-            best = i;
-    }
-    return best;
-}
-
-static void alac_stereo_decorrelation(AlacEncodeContext *s)
-{
-    int32_t *left = s->sample_buf[0], *right = s->sample_buf[1];
-    int i, mode, n = s->frame_size;
-    int32_t tmp;
-
-    mode = estimate_stereo_mode(left, right, n);
-
-    switch (mode) {
-    case ALAC_CHMODE_LEFT_RIGHT:
-        s->interlacing_leftweight = 0;
-        s->interlacing_shift      = 0;
-        break;
-    case ALAC_CHMODE_LEFT_SIDE:
-        for (i = 0; i < n; i++)
-            right[i] = left[i] - right[i];
-        s->interlacing_leftweight = 1;
-        s->interlacing_shift      = 0;
-        break;
-    case ALAC_CHMODE_RIGHT_SIDE:
-        for (i = 0; i < n; i++) {
-            tmp = right[i];
-            right[i] = left[i] - right[i];
-            left[i]  = tmp + (right[i] >> 31);
-        }
-        s->interlacing_leftweight = 1;
-        s->interlacing_shift      = 31;
-        break;
-    default:
-        for (i = 0; i < n; i++) {
-            tmp = left[i];
-            left[i]  = (tmp + right[i]) >> 1;
-            right[i] =  tmp - right[i];
-        }
-        s->interlacing_leftweight = 1;
-        s->interlacing_shift      = 1;
-        break;
-    }
-}
-
-static void alac_linear_predictor(AlacEncodeContext *s, int ch)
-{
-    int i;
-    AlacLPCContext lpc = s->lpc[ch];
-
-    if (lpc.lpc_order == 31) {
-        s->predictor_buf[0] = s->sample_buf[ch][0];
-
-        for (i = 1; i < s->frame_size; i++) {
-            s->predictor_buf[i] = s->sample_buf[ch][i    ] -
-                                  s->sample_buf[ch][i - 1];
-        }
-
-        return;
-    }
-
-    // generalised linear predictor
-
-    if (lpc.lpc_order > 0) {
-        int32_t *samples  = s->sample_buf[ch];
-        int32_t *residual = s->predictor_buf;
-
-        // generate warm-up samples
-        residual[0] = samples[0];
-        for (i = 1; i <= lpc.lpc_order; i++)
-            residual[i] = sign_extend(samples[i] - samples[i-1], s->write_sample_size);
-
-        // perform lpc on remaining samples
-        for (i = lpc.lpc_order + 1; i < s->frame_size; i++) {
-            int sum = 1 << (lpc.lpc_quant - 1), res_val, j;
-
-            for (j = 0; j < lpc.lpc_order; j++) {
-                sum += (samples[lpc.lpc_order-j] - samples[0]) *
-                       lpc.lpc_coeff[j];
-            }
-
-            sum >>= lpc.lpc_quant;
-            sum += samples[0];
-            residual[i] = sign_extend(samples[lpc.lpc_order+1] - sum,
-                                      s->write_sample_size);
-            res_val = residual[i];
-
-            if (res_val) {
-                int index = lpc.lpc_order - 1;
-                int neg = (res_val < 0);
-
-                while (index >= 0 && (neg ? (res_val < 0) : (res_val > 0))) {
-                    int val  = samples[0] - samples[lpc.lpc_order - index];
-                    int sign = (val ? FFSIGN(val) : 0);
-
-                    if (neg)
-                        sign *= -1;
-
-                    lpc.lpc_coeff[index] -= sign;
-                    val *= sign;
-                    res_val -= (val >> lpc.lpc_quant) * (lpc.lpc_order - index);
-                    index--;
-                }
-            }
-            samples++;
-        }
-    }
-}
-
-static void alac_entropy_coder(AlacEncodeContext *s)
-{
-    unsigned int history = s->rc.initial_history;
-    int sign_modifier = 0, i, k;
-    int32_t *samples = s->predictor_buf;
-
-    for (i = 0; i < s->frame_size;) {
-        int x;
-
-        k = av_log2((history >> 9) + 3);
-
-        x  = -2 * (*samples) -1;
-        x ^= x >> 31;
-
-        samples++;
-        i++;
-
-        encode_scalar(s, x - sign_modifier, k, s->write_sample_size);
-
-        history += x * s->rc.history_mult -
-                   ((history * s->rc.history_mult) >> 9);
-
-        sign_modifier = 0;
-        if (x > 0xFFFF)
-            history = 0xFFFF;
-
-        if (history < 128 && i < s->frame_size) {
-            unsigned int block_size = 0;
-
-            k = 7 - av_log2(history) + ((history + 16) >> 6);
-
-            while (*samples == 0 && i < s->frame_size) {
-                samples++;
-                i++;
-                block_size++;
-            }
-            encode_scalar(s, block_size, k, 16);
-            sign_modifier = (block_size <= 0xFFFF);
-            history = 0;
-        }
-
-    }
-}
-
-static void write_element(AlacEncodeContext *s,
-                          enum AlacRawDataBlockType element, int instance,
-                          const uint8_t *samples0, const uint8_t *samples1)
-{
-    uint8_t const *samples[2] = { samples0, samples1 };
-    int i, j, channels;
-    int prediction_type = 0;
-    PutBitContext *pb = &s->pbctx;
-
-    channels = element == TYPE_CPE ? 2 : 1;
-
-    if (s->verbatim) {
-        write_element_header(s, element, instance);
-        /* samples are channel-interleaved in verbatim mode */
-        if (s->avctx->sample_fmt == AV_SAMPLE_FMT_S32P) {
-            int shift = 32 - s->avctx->bits_per_raw_sample;
-            int32_t const *samples_s32[2] = { (const int32_t *)samples0,
-                                              (const int32_t *)samples1 };
-            for (i = 0; i < s->frame_size; i++)
-                for (j = 0; j < channels; j++)
-                    put_sbits(pb, s->avctx->bits_per_raw_sample,
-                              samples_s32[j][i] >> shift);
-        } else {
-            int16_t const *samples_s16[2] = { (const int16_t *)samples0,
-                                              (const int16_t *)samples1 };
-            for (i = 0; i < s->frame_size; i++)
-                for (j = 0; j < channels; j++)
-                    put_sbits(pb, s->avctx->bits_per_raw_sample,
-                              samples_s16[j][i]);
-        }
-    } else {
-        s->write_sample_size = s->avctx->bits_per_raw_sample - s->extra_bits +
-                               channels - 1;
-
-        init_sample_buffers(s, channels, samples);
-        write_element_header(s, element, instance);
-
-        if (channels == 2)
-            alac_stereo_decorrelation(s);
-        else
-            s->interlacing_shift = s->interlacing_leftweight = 0;
-        put_bits(pb, 8, s->interlacing_shift);
-        put_bits(pb, 8, s->interlacing_leftweight);
-
-        for (i = 0; i < channels; i++) {
-            calc_predictor_params(s, i);
-
-            put_bits(pb, 4, prediction_type);
-            put_bits(pb, 4, s->lpc[i].lpc_quant);
-
-            put_bits(pb, 3, s->rc.rice_modifier);
-            put_bits(pb, 5, s->lpc[i].lpc_order);
-            // predictor coeff. table
-            for (j = 0; j < s->lpc[i].lpc_order; j++)
-                put_sbits(pb, 16, s->lpc[i].lpc_coeff[j]);
-        }
-
-        // write extra bits if needed
-        if (s->extra_bits) {
-            uint32_t mask = (1 << s->extra_bits) - 1;
-            for (i = 0; i < s->frame_size; i++) {
-                for (j = 0; j < channels; j++) {
-                    put_bits(pb, s->extra_bits, s->sample_buf[j][i] & mask);
-                    s->sample_buf[j][i] >>= s->extra_bits;
-                }
-            }
-        }
-
-        // apply lpc and entropy coding to audio samples
-        for (i = 0; i < channels; i++) {
-            alac_linear_predictor(s, i);
-
-            // TODO: determine when this will actually help. for now it's not used.
-            if (prediction_type == 15) {
-                // 2nd pass 1st order filter
-                for (j = s->frame_size - 1; j > 0; j--)
-                    s->predictor_buf[j] -= s->predictor_buf[j - 1];
-            }
-            alac_entropy_coder(s);
-        }
-    }
-}
-
-static int write_frame(AlacEncodeContext *s, AVPacket *avpkt,
-                       uint8_t * const *samples)
-{
-    PutBitContext *pb = &s->pbctx;
-    const enum AlacRawDataBlockType *ch_elements = ff_alac_channel_elements[s->avctx->channels - 1];
-    const uint8_t *ch_map = ff_alac_channel_layout_offsets[s->avctx->channels - 1];
-    int ch, element, sce, cpe;
-
-    init_put_bits(pb, avpkt->data, avpkt->size);
-
-    ch = element = sce = cpe = 0;
-    while (ch < s->avctx->channels) {
-        if (ch_elements[element] == TYPE_CPE) {
-            write_element(s, TYPE_CPE, cpe, samples[ch_map[ch]],
-                          samples[ch_map[ch + 1]]);
-            cpe++;
-            ch += 2;
-        } else {
-            write_element(s, TYPE_SCE, sce, samples[ch_map[ch]], NULL);
-            sce++;
-            ch++;
-        }
-        element++;
-    }
-
-    put_bits(pb, 3, TYPE_END);
-    flush_put_bits(pb);
-
-    return put_bits_count(pb) >> 3;
-}
-
-static av_always_inline int get_max_frame_size(int frame_size, int ch, int bps)
-{
-    int header_bits = 23 + 32 * (frame_size < DEFAULT_FRAME_SIZE);
-    return FFALIGN(header_bits + bps * ch * frame_size + 3, 8) / 8;
-}
-
-static av_cold int alac_encode_close(AVCodecContext *avctx)
-{
-    AlacEncodeContext *s = avctx->priv_data;
-    ff_lpc_end(&s->lpc_ctx);
-    av_freep(&avctx->extradata);
-    avctx->extradata_size = 0;
-    return 0;
-}
-
-static av_cold int alac_encode_init(AVCodecContext *avctx)
-{
-    AlacEncodeContext *s = avctx->priv_data;
-    int ret;
-    uint8_t *alac_extradata;
-
-    avctx->frame_size = s->frame_size = DEFAULT_FRAME_SIZE;
-
-    if (avctx->sample_fmt == AV_SAMPLE_FMT_S32P) {
-        if (avctx->bits_per_raw_sample != 24)
-            av_log(avctx, AV_LOG_WARNING, "encoding as 24 bits-per-sample\n");
-        avctx->bits_per_raw_sample = 24;
-    } else {
-        avctx->bits_per_raw_sample = 16;
-        s->extra_bits              = 0;
-    }
-
-    // Set default compression level
-    if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
-        s->compression_level = 2;
-    else
-        s->compression_level = av_clip(avctx->compression_level, 0, 2);
-
-    // Initialize default Rice parameters
-    s->rc.history_mult    = 40;
-    s->rc.initial_history = 10;
-    s->rc.k_modifier      = 14;
-    s->rc.rice_modifier   = 4;
-
-    s->max_coded_frame_size = get_max_frame_size(avctx->frame_size,
-                                                 avctx->channels,
-                                                 avctx->bits_per_raw_sample);
-
-    avctx->extradata = av_mallocz(ALAC_EXTRADATA_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
-    if (!avctx->extradata) {
-        ret = AVERROR(ENOMEM);
-        goto error;
-    }
-    avctx->extradata_size = ALAC_EXTRADATA_SIZE;
-
-    alac_extradata = avctx->extradata;
-    AV_WB32(alac_extradata,    ALAC_EXTRADATA_SIZE);
-    AV_WB32(alac_extradata+4,  MKBETAG('a','l','a','c'));
-    AV_WB32(alac_extradata+12, avctx->frame_size);
-    AV_WB8 (alac_extradata+17, avctx->bits_per_raw_sample);
-    AV_WB8 (alac_extradata+21, avctx->channels);
-    AV_WB32(alac_extradata+24, s->max_coded_frame_size);
-    AV_WB32(alac_extradata+28,
-            avctx->sample_rate * avctx->channels * avctx->bits_per_raw_sample); // average bitrate
-    AV_WB32(alac_extradata+32, avctx->sample_rate);
-
-    // Set relevant extradata fields
-    if (s->compression_level > 0) {
-        AV_WB8(alac_extradata+18, s->rc.history_mult);
-        AV_WB8(alac_extradata+19, s->rc.initial_history);
-        AV_WB8(alac_extradata+20, s->rc.k_modifier);
-    }
-
-    s->min_prediction_order = DEFAULT_MIN_PRED_ORDER;
-    if (avctx->min_prediction_order >= 0) {
-        if (avctx->min_prediction_order < MIN_LPC_ORDER ||
-           avctx->min_prediction_order > ALAC_MAX_LPC_ORDER) {
-            av_log(avctx, AV_LOG_ERROR, "invalid min prediction order: %d\n",
-                   avctx->min_prediction_order);
-            ret = AVERROR(EINVAL);
-            goto error;
-        }
-
-        s->min_prediction_order = avctx->min_prediction_order;
-    }
-
-    s->max_prediction_order = DEFAULT_MAX_PRED_ORDER;
-    if (avctx->max_prediction_order >= 0) {
-        if (avctx->max_prediction_order < MIN_LPC_ORDER ||
-            avctx->max_prediction_order > ALAC_MAX_LPC_ORDER) {
-            av_log(avctx, AV_LOG_ERROR, "invalid max prediction order: %d\n",
-                   avctx->max_prediction_order);
-            ret = AVERROR(EINVAL);
-            goto error;
-        }
-
-        s->max_prediction_order = avctx->max_prediction_order;
-    }
-
-    if (s->max_prediction_order < s->min_prediction_order) {
-        av_log(avctx, AV_LOG_ERROR,
-               "invalid prediction orders: min=%d max=%d\n",
-               s->min_prediction_order, s->max_prediction_order);
-        ret = AVERROR(EINVAL);
-        goto error;
-    }
-
-    s->avctx = avctx;
-
-    if ((ret = ff_lpc_init(&s->lpc_ctx, avctx->frame_size,
-                           s->max_prediction_order,
-                           FF_LPC_TYPE_LEVINSON)) < 0) {
-        goto error;
-    }
-
-    return 0;
-error:
-    alac_encode_close(avctx);
-    return ret;
-}
-
-static int alac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
-                             const AVFrame *frame, int *got_packet_ptr)
-{
-    AlacEncodeContext *s = avctx->priv_data;
-    int out_bytes, max_frame_size, ret;
-
-    s->frame_size = frame->nb_samples;
-
-    if (frame->nb_samples < DEFAULT_FRAME_SIZE)
-        max_frame_size = get_max_frame_size(s->frame_size, avctx->channels,
-                                            avctx->bits_per_raw_sample);
-    else
-        max_frame_size = s->max_coded_frame_size;
-
-    if ((ret = ff_alloc_packet2(avctx, avpkt, 2 * max_frame_size)) < 0)
-        return ret;
-
-    /* use verbatim mode for compression_level 0 */
-    if (s->compression_level) {
-        s->verbatim   = 0;
-        s->extra_bits = avctx->bits_per_raw_sample - 16;
-    } else {
-        s->verbatim   = 1;
-        s->extra_bits = 0;
-    }
-
-    out_bytes = write_frame(s, avpkt, frame->extended_data);
-
-    if (out_bytes > max_frame_size) {
-        /* frame too large. use verbatim mode */
-        s->verbatim = 1;
-        s->extra_bits = 0;
-        out_bytes = write_frame(s, avpkt, frame->extended_data);
-    }
-
-    avpkt->size = out_bytes;
-    *got_packet_ptr = 1;
-    return 0;
-}
-
-AVCodec ff_alac_encoder = {
-    .name           = "alac",
-    .long_name      = NULL_IF_CONFIG_SMALL("ALAC (Apple Lossless Audio Codec)"),
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = AV_CODEC_ID_ALAC,
-    .priv_data_size = sizeof(AlacEncodeContext),
-    .init           = alac_encode_init,
-    .encode2        = alac_encode_frame,
-    .close          = alac_encode_close,
-    .capabilities   = CODEC_CAP_SMALL_LAST_FRAME,
-    .channel_layouts = ff_alac_channel_layouts,
-    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32P,
-                                                     AV_SAMPLE_FMT_S16P,
-                                                     AV_SAMPLE_FMT_NONE },
-};