x86: huffyuvdsp: Move inline assembly to init file
[ffmpeg.git] / libavcodec / pcm.c
index 811264b..9fadcb7 100644 (file)
 /*
  * PCM codecs
- * Copyright (c) 2001 Fabrice Bellard.
+ * Copyright (c) 2001 Fabrice Bellard
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * Libav 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
-#include "avcodec.h"
-
-/* from g711.c by SUN microsystems (unrestricted use) */
-
-#define        SIGN_BIT        (0x80)          /* Sign bit for a A-law byte. */
-#define        QUANT_MASK      (0xf)           /* Quantization field mask. */
-#define        NSEGS           (8)             /* Number of A-law segments. */
-#define        SEG_SHIFT       (4)             /* Left shift for segment number. */
-#define        SEG_MASK        (0x70)          /* Segment field mask. */
 
-#define        BIAS            (0x84)          /* Bias for linear code. */
-
-/*
- * alaw2linear() - Convert an A-law value to 16-bit linear PCM
- *
+/**
+ * @file
+ * PCM codecs
  */
-static int alaw2linear(unsigned char   a_val)
-{
-       int             t;
-       int             seg;
-
-       a_val ^= 0x55;
-
-       t = (a_val & QUANT_MASK) << 4;
-       seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
-       switch (seg) {
-       case 0:
-               t += 8;
-               break;
-       case 1:
-               t += 0x108;
-               break;
-       default:
-               t += 0x108;
-               t <<= seg - 1;
-       }
-       return ((a_val & SIGN_BIT) ? t : -t);
-}
-
-static int ulaw2linear(unsigned char   u_val)
-{
-       int             t;
-
-       /* Complement to obtain normal u-law value. */
-       u_val = ~u_val;
-
-       /*
-        * Extract and bias the quantization bits. Then
-        * shift up by the segment number and subtract out the bias.
-        */
-       t = ((u_val & QUANT_MASK) << 3) + BIAS;
-       t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
 
-       return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
-}
-
-/* 16384 entries per table */
-static UINT8 *linear_to_alaw = NULL;
-static int linear_to_alaw_ref = 0;
-
-static UINT8 *linear_to_ulaw = NULL;
-static int linear_to_ulaw_ref = 0;
-
-static void build_xlaw_table(UINT8 *linear_to_xlaw, 
-                             int (*xlaw2linear)(unsigned char),
-                             int mask) 
-{
-    int i, j, v, v1, v2;
-
-    j = 0;
-    for(i=0;i<128;i++) {
-        if (i != 127) {
-            v1 = xlaw2linear(i ^ mask);
-            v2 = xlaw2linear((i + 1) ^ mask);
-            v = (v1 + v2 + 4) >> 3;
-        } else {
-            v = 8192;
-        }
-        for(;j<v;j++) {
-            linear_to_xlaw[8192 + j] = (i ^ mask);
-            if (j > 0)
-                linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
-        }
-    }
-    linear_to_xlaw[0] = linear_to_xlaw[1];
-}
+#include "libavutil/attributes.h"
+#include "avcodec.h"
+#include "bytestream.h"
+#include "internal.h"
+#include "mathops.h"
+#include "pcm_tablegen.h"
 
-static int pcm_encode_init(AVCodecContext *avctx)
+static av_cold int pcm_encode_init(AVCodecContext *avctx)
 {
-    avctx->frame_size = 1;
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_ALAW:
-        if (linear_to_alaw_ref == 0) {
-            linear_to_alaw = av_malloc(16384);
-            if (!linear_to_alaw)
-                return -1;
-            build_xlaw_table(linear_to_alaw, alaw2linear, 0xd5);
-        }
-        linear_to_alaw_ref++;
-        break;
-    case CODEC_ID_PCM_MULAW:
-        if (linear_to_ulaw_ref == 0) {
-            linear_to_ulaw = av_malloc(16384);
-            if (!linear_to_ulaw)
-                return -1;
-            build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
-        }
-        linear_to_ulaw_ref++;
+    avctx->frame_size = 0;
+    switch (avctx->codec->id) {
+    case AV_CODEC_ID_PCM_ALAW:
+        pcm_alaw_tableinit();
+        break;
+    case AV_CODEC_ID_PCM_MULAW:
+        pcm_ulaw_tableinit();
         break;
     default:
         break;
     }
-    
-    avctx->coded_frame= avcodec_alloc_frame();
-    avctx->coded_frame->key_frame= 1;
-    
+
+    avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
+    avctx->block_align           = avctx->channels * avctx->bits_per_coded_sample / 8;
+    avctx->bit_rate              = avctx->block_align * avctx->sample_rate * 8;
+    avctx->coded_frame           = av_frame_alloc();
+    if (!avctx->coded_frame)
+        return AVERROR(ENOMEM);
+
     return 0;
 }
 
-static int pcm_encode_close(AVCodecContext *avctx)
+static av_cold int pcm_encode_close(AVCodecContext *avctx)
 {
     av_freep(&avctx->coded_frame);
 
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_ALAW:
-        if (--linear_to_alaw_ref == 0)
-            av_free(linear_to_alaw);
-        break;
-    case CODEC_ID_PCM_MULAW:
-        if (--linear_to_ulaw_ref == 0)
-            av_free(linear_to_ulaw);
-        break;
-    default:
-        /* nothing to free */
-        break;
-    }
     return 0;
 }
 
-static int pcm_encode_frame(AVCodecContext *avctx,
-                           unsigned char *frame, int buf_size, void *data)
+/**
+ * Write PCM samples macro
+ * @param type   Datatype of native machine format
+ * @param endian bytestream_put_xxx() suffix
+ * @param src    Source pointer (variable name)
+ * @param dst    Destination pointer (variable name)
+ * @param n      Total number of samples (variable name)
+ * @param shift  Bitshift (bits)
+ * @param offset Sample value offset
+ */
+#define ENCODE(type, endian, src, dst, n, shift, offset)                \
+    samples_ ## type = (const type *) src;                              \
+    for (; n > 0; n--) {                                                \
+        register type v = (*samples_ ## type++ >> shift) + offset;      \
+        bytestream_put_ ## endian(&dst, v);                             \
+    }
+
+static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+                            const AVFrame *frame, int *got_packet_ptr)
 {
-    int n, sample_size, v;
-    short *samples;
+    int n, sample_size, v, ret;
+    const short *samples;
     unsigned char *dst;
+    const uint8_t *srcu8;
+    const int16_t *samples_int16_t;
+    const int32_t *samples_int32_t;
+    const int64_t *samples_int64_t;
+    const uint16_t *samples_uint16_t;
+    const uint32_t *samples_uint32_t;
 
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_S16LE:
-    case CODEC_ID_PCM_S16BE:
-    case CODEC_ID_PCM_U16LE:
-    case CODEC_ID_PCM_U16BE:
-        sample_size = 2;
+    sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
+    n           = frame->nb_samples * avctx->channels;
+    samples     = (const short *)frame->data[0];
+
+    if ((ret = ff_alloc_packet(avpkt, n * sample_size))) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+        return ret;
+    }
+    dst = avpkt->data;
+
+    switch (avctx->codec->id) {
+    case AV_CODEC_ID_PCM_U32LE:
+        ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
         break;
-    default:
-        sample_size = 1;
+    case AV_CODEC_ID_PCM_U32BE:
+        ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
         break;
-    }
-    n = buf_size / sample_size;
-    samples = data;
-    dst = frame;
-
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_S16LE:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = v & 0xff;
-            dst[1] = v >> 8;
-            dst += 2;
-        }
+    case AV_CODEC_ID_PCM_S24LE:
+        ENCODE(int32_t, le24, samples, dst, n, 8, 0)
         break;
-    case CODEC_ID_PCM_S16BE:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = v >> 8;
-            dst[1] = v;
-            dst += 2;
-        }
+    case AV_CODEC_ID_PCM_S24BE:
+        ENCODE(int32_t, be24, samples, dst, n, 8, 0)
         break;
-    case CODEC_ID_PCM_U16LE:
-        for(;n>0;n--) {
-            v = *samples++;
-            v += 0x8000;
-            dst[0] = v & 0xff;
-            dst[1] = v >> 8;
-            dst += 2;
-        }
+    case AV_CODEC_ID_PCM_U24LE:
+        ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
         break;
-    case CODEC_ID_PCM_U16BE:
-        for(;n>0;n--) {
-            v = *samples++;
-            v += 0x8000;
-            dst[0] = v >> 8;
-            dst[1] = v;
-            dst += 2;
-        }
+    case AV_CODEC_ID_PCM_U24BE:
+        ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
         break;
-    case CODEC_ID_PCM_S8:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = v >> 8;
-            dst++;
+    case AV_CODEC_ID_PCM_S24DAUD:
+        for (; n > 0; n--) {
+            uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
+                           (ff_reverse[*samples & 0xff] << 8);
+            tmp <<= 4; // sync flags would go here
+            bytestream_put_be24(&dst, tmp);
+            samples++;
         }
         break;
-    case CODEC_ID_PCM_U8:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = (v >> 8) + 128;
-            dst++;
+    case AV_CODEC_ID_PCM_U16LE:
+        ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
+        break;
+    case AV_CODEC_ID_PCM_U16BE:
+        ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
+        break;
+    case AV_CODEC_ID_PCM_S8:
+        srcu8 = frame->data[0];
+        for (; n > 0; n--) {
+            v      = *srcu8++;
+            *dst++ = v - 128;
         }
         break;
-    case CODEC_ID_PCM_ALAW:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = linear_to_alaw[(v + 32768) >> 2];
-            dst++;
+#if HAVE_BIGENDIAN
+    case AV_CODEC_ID_PCM_F64LE:
+        ENCODE(int64_t, le64, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S32LE:
+    case AV_CODEC_ID_PCM_F32LE:
+        ENCODE(int32_t, le32, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S16LE:
+        ENCODE(int16_t, le16, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F64BE:
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_S32BE:
+    case AV_CODEC_ID_PCM_S16BE:
+#else
+    case AV_CODEC_ID_PCM_F64BE:
+        ENCODE(int64_t, be64, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_S32BE:
+        ENCODE(int32_t, be32, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S16BE:
+        ENCODE(int16_t, be16, samples, dst, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F64LE:
+    case AV_CODEC_ID_PCM_F32LE:
+    case AV_CODEC_ID_PCM_S32LE:
+    case AV_CODEC_ID_PCM_S16LE:
+#endif /* HAVE_BIGENDIAN */
+    case AV_CODEC_ID_PCM_U8:
+        memcpy(dst, samples, n * sample_size);
+        dst += n * sample_size;
+        break;
+    case AV_CODEC_ID_PCM_ALAW:
+        for (; n > 0; n--) {
+            v      = *samples++;
+            *dst++ = linear_to_alaw[(v + 32768) >> 2];
         }
         break;
-    case CODEC_ID_PCM_MULAW:
-        for(;n>0;n--) {
-            v = *samples++;
-            dst[0] = linear_to_ulaw[(v + 32768) >> 2];
-            dst++;
+    case AV_CODEC_ID_PCM_MULAW:
+        for (; n > 0; n--) {
+            v      = *samples++;
+            *dst++ = linear_to_ulaw[(v + 32768) >> 2];
         }
         break;
     default:
         return -1;
     }
-    //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
 
-    return dst - frame;
+    *got_packet_ptr = 1;
+    return 0;
 }
 
 typedef struct PCMDecode {
-    short table[256];
+    short   table[256];
 } PCMDecode;
 
-static int pcm_decode_init(AVCodecContext * avctx)
+static av_cold int pcm_decode_init(AVCodecContext *avctx)
 {
     PCMDecode *s = avctx->priv_data;
     int i;
 
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_ALAW:
-        for(i=0;i<256;i++)
+    if (avctx->channels <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
+        return AVERROR(EINVAL);
+    }
+
+    switch (avctx->codec->id) {
+    case AV_CODEC_ID_PCM_ALAW:
+        for (i = 0; i < 256; i++)
             s->table[i] = alaw2linear(i);
         break;
-    case CODEC_ID_PCM_MULAW:
-        for(i=0;i<256;i++)
+    case AV_CODEC_ID_PCM_MULAW:
+        for (i = 0; i < 256; i++)
             s->table[i] = ulaw2linear(i);
         break;
     default:
         break;
     }
+
+    avctx->sample_fmt = avctx->codec->sample_fmts[0];
+
+    if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
+        avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
+
     return 0;
 }
 
-static int pcm_decode_frame(AVCodecContext *avctx,
-                           void *data, int *data_size,
-                           UINT8 *buf, int buf_size)
+/**
+ * Read PCM samples macro
+ * @param size   Data size of native machine format
+ * @param endian bytestream_get_xxx() endian suffix
+ * @param src    Source pointer (variable name)
+ * @param dst    Destination pointer (variable name)
+ * @param n      Total number of samples (variable name)
+ * @param shift  Bitshift (bits)
+ * @param offset Sample value offset
+ */
+#define DECODE(size, endian, src, dst, n, shift, offset)                \
+    for (; n > 0; n--) {                                                \
+        uint ## size ## _t v = bytestream_get_ ## endian(&src);         \
+        AV_WN ## size ## A(dst, (v - offset) << shift);                 \
+        dst += size / 8;                                                \
+    }
+
+#if HAVE_BIGENDIAN
+#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)         \
+    {                                                                   \
+        int av_unused n2;                                               \
+        n /= avctx->channels;                                           \
+        for (c = 0; c < avctx->channels; c++) {                         \
+            samples = frame->extended_data[c];                          \
+            n2 = n;                                                     \
+            DECODE(size, endian, src, samples, n2, 0, 0)                \
+        }                                                               \
+    }
+#else
+#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)         \
+    {                                                                   \
+        int av_unused n2;                                               \
+        n /= avctx->channels;                                           \
+        for (c = 0; c < avctx->channels; c++) {                         \
+            samples = frame->extended_data[c];                          \
+            memcpy(samples, src, n * size / 8);                         \
+            src += n * size / 8;                                        \
+        }                                                               \
+    }
+#endif /* HAVE_BIGENDIAN */
+
+static int pcm_decode_frame(AVCodecContext *avctx, void *data,
+                            int *got_frame_ptr, AVPacket *avpkt)
 {
-    PCMDecode *s = avctx->priv_data;
-    int n;
-    short *samples;
-    UINT8 *src;
-
-    samples = data;
-    src = buf;
-
-    switch(avctx->codec->id) {
-    case CODEC_ID_PCM_S16LE:
-        n = buf_size >> 1;
-        for(;n>0;n--) {
-            *samples++ = src[0] | (src[1] << 8);
-            src += 2;
-        }
+    const uint8_t *src = avpkt->data;
+    int buf_size       = avpkt->size;
+    PCMDecode *s       = avctx->priv_data;
+    AVFrame *frame     = data;
+    int sample_size, c, n, ret, samples_per_block;
+    uint8_t *samples;
+    int32_t *dst_int32_t;
+
+    sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
+
+    /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
+    samples_per_block = 1;
+    if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
+        /* we process 40-bit blocks per channel for LXF */
+        samples_per_block = 2;
+        sample_size       = 5;
+    }
+
+    if (sample_size == 0) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
+        return AVERROR(EINVAL);
+    }
+
+    n = avctx->channels * sample_size;
+
+    if (n && buf_size % n) {
+        if (buf_size < n) {
+            av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
+            return -1;
+        } else
+            buf_size -= buf_size % n;
+    }
+
+    n = buf_size / sample_size;
+
+    /* get output buffer */
+    frame->nb_samples = n * samples_per_block / avctx->channels;
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
+    }
+    samples = frame->data[0];
+
+    switch (avctx->codec->id) {
+    case AV_CODEC_ID_PCM_U32LE:
+        DECODE(32, le32, src, samples, n, 0, 0x80000000)
         break;
-    case CODEC_ID_PCM_S16BE:
-        n = buf_size >> 1;
-        for(;n>0;n--) {
-            *samples++ = (src[0] << 8) | src[1];
-            src += 2;
-        }
+    case AV_CODEC_ID_PCM_U32BE:
+        DECODE(32, be32, src, samples, n, 0, 0x80000000)
         break;
-    case CODEC_ID_PCM_U16LE:
-        n = buf_size >> 1;
-        for(;n>0;n--) {
-            *samples++ = (src[0] | (src[1] << 8)) - 0x8000;
-            src += 2;
-        }
+    case AV_CODEC_ID_PCM_S24LE:
+        DECODE(32, le24, src, samples, n, 8, 0)
+        break;
+    case AV_CODEC_ID_PCM_S24BE:
+        DECODE(32, be24, src, samples, n, 8, 0)
+        break;
+    case AV_CODEC_ID_PCM_U24LE:
+        DECODE(32, le24, src, samples, n, 8, 0x800000)
+        break;
+    case AV_CODEC_ID_PCM_U24BE:
+        DECODE(32, be24, src, samples, n, 8, 0x800000)
         break;
-    case CODEC_ID_PCM_U16BE:
-        n = buf_size >> 1;
-        for(;n>0;n--) {
-            *samples++ = ((src[0] << 8) | src[1]) - 0x8000;
-            src += 2;
+    case AV_CODEC_ID_PCM_S24DAUD:
+        for (; n > 0; n--) {
+            uint32_t v = bytestream_get_be24(&src);
+            v >>= 4; // sync flags are here
+            AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
+                             (ff_reverse[v        & 0xff] << 8));
+            samples += 2;
         }
         break;
-    case CODEC_ID_PCM_S8:
-        n = buf_size;
-        for(;n>0;n--) {
-            *samples++ = src[0] << 8;
-            src++;
+    case AV_CODEC_ID_PCM_S16LE_PLANAR:
+        DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
+        break;
+    case AV_CODEC_ID_PCM_S24LE_PLANAR:
+        DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
+        break;
+    case AV_CODEC_ID_PCM_S32LE_PLANAR:
+        DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
+        break;
+    case AV_CODEC_ID_PCM_U16LE:
+        DECODE(16, le16, src, samples, n, 0, 0x8000)
+        break;
+    case AV_CODEC_ID_PCM_U16BE:
+        DECODE(16, be16, src, samples, n, 0, 0x8000)
+        break;
+    case AV_CODEC_ID_PCM_S8:
+        for (; n > 0; n--)
+            *samples++ = *src++ + 128;
+        break;
+#if HAVE_BIGENDIAN
+    case AV_CODEC_ID_PCM_F64LE:
+        DECODE(64, le64, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S32LE:
+    case AV_CODEC_ID_PCM_F32LE:
+        DECODE(32, le32, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S16LE:
+        DECODE(16, le16, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F64BE:
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_S32BE:
+    case AV_CODEC_ID_PCM_S16BE:
+#else
+    case AV_CODEC_ID_PCM_F64BE:
+        DECODE(64, be64, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_S32BE:
+        DECODE(32, be32, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_S16BE:
+        DECODE(16, be16, src, samples, n, 0, 0)
+        break;
+    case AV_CODEC_ID_PCM_F64LE:
+    case AV_CODEC_ID_PCM_F32LE:
+    case AV_CODEC_ID_PCM_S32LE:
+    case AV_CODEC_ID_PCM_S16LE:
+#endif /* HAVE_BIGENDIAN */
+    case AV_CODEC_ID_PCM_U8:
+        memcpy(samples, src, n * sample_size);
+        break;
+    case AV_CODEC_ID_PCM_ZORK:
+        for (; n > 0; n--) {
+            int v = *src++;
+            if (v < 128)
+                v = 128 - v;
+            *samples++ = v;
         }
         break;
-    case CODEC_ID_PCM_U8:
-        n = buf_size;
-        for(;n>0;n--) {
-            *samples++ = ((int)src[0] - 128) << 8;
-            src++;
+    case AV_CODEC_ID_PCM_ALAW:
+    case AV_CODEC_ID_PCM_MULAW:
+        for (; n > 0; n--) {
+            AV_WN16A(samples, s->table[*src++]);
+            samples += 2;
         }
         break;
-    case CODEC_ID_PCM_ALAW:
-    case CODEC_ID_PCM_MULAW:
-        n = buf_size;
-        for(;n>0;n--) {
-            *samples++ = s->table[src[0]];
-            src++;
+    case AV_CODEC_ID_PCM_LXF:
+    {
+        int i;
+        n /= avctx->channels;
+        for (c = 0; c < avctx->channels; c++) {
+            dst_int32_t = (int32_t *)frame->extended_data[c];
+            for (i = 0; i < n; i++) {
+                // extract low 20 bits and expand to 32 bits
+                *dst_int32_t++ =  (src[2]         << 28) |
+                                  (src[1]         << 20) |
+                                  (src[0]         << 12) |
+                                 ((src[2] & 0x0F) <<  8) |
+                                   src[1];
+                // extract high 20 bits and expand to 32 bits
+                *dst_int32_t++ =  (src[4]         << 24) |
+                                  (src[3]         << 16) |
+                                 ((src[2] & 0xF0) <<  8) |
+                                  (src[4]         <<  4) |
+                                  (src[3]         >>  4);
+                src += 5;
+            }
         }
         break;
+    }
     default:
-        *data_size = 0;
         return -1;
     }
-    *data_size = (UINT8 *)samples - (UINT8 *)data;
-    return src - buf;
+
+    *got_frame_ptr = 1;
+
+    return buf_size;
 }
 
-#define PCM_CODEC(id, name)                     \
-AVCodec name ## _encoder = {                    \
-    #name,                                      \
-    CODEC_TYPE_AUDIO,                           \
-    id,                                         \
-    0,                                          \
-    pcm_encode_init,                           \
-    pcm_encode_frame,                          \
-    pcm_encode_close,                          \
-    NULL,                                       \
-};                                              \
-AVCodec name ## _decoder = {                    \
-    #name,                                      \
-    CODEC_TYPE_AUDIO,                           \
-    id,                                         \
-    sizeof(PCMDecode),                          \
-    pcm_decode_init,                           \
-    NULL,                                       \
-    NULL,                                       \
-    pcm_decode_frame,                           \
-};
-
-PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
-PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
-PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
-PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
-PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
-PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
-PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
-PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
-
-#undef PCM_CODEC
+#define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
+#define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_)                  \
+AVCodec ff_ ## name_ ## _encoder = {                                        \
+    .name         = #name_,                                                 \
+    .long_name    = NULL_IF_CONFIG_SMALL(long_name_),                       \
+    .type         = AVMEDIA_TYPE_AUDIO,                                     \
+    .id           = AV_CODEC_ID_ ## id_,                                    \
+    .init         = pcm_encode_init,                                        \
+    .encode2      = pcm_encode_frame,                                       \
+    .close        = pcm_encode_close,                                       \
+    .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE,                          \
+    .sample_fmts  = (const enum AVSampleFormat[]){ sample_fmt_,             \
+                                                   AV_SAMPLE_FMT_NONE },    \
+}
+
+#define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)                  \
+    PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
+#define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name)                  \
+    PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
+#define PCM_ENCODER(id, sample_fmt, name, long_name)                        \
+    PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
+
+#define PCM_DECODER_0(id, sample_fmt, name, long_name)
+#define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_)                  \
+AVCodec ff_ ## name_ ## _decoder = {                                        \
+    .name           = #name_,                                               \
+    .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \
+    .type           = AVMEDIA_TYPE_AUDIO,                                   \
+    .id             = AV_CODEC_ID_ ## id_,                                  \
+    .priv_data_size = sizeof(PCMDecode),                                    \
+    .init           = pcm_decode_init,                                      \
+    .decode         = pcm_decode_frame,                                     \
+    .capabilities   = CODEC_CAP_DR1,                                        \
+    .sample_fmts    = (const enum AVSampleFormat[]){ sample_fmt_,           \
+                                                     AV_SAMPLE_FMT_NONE },  \
+}
+
+#define PCM_DECODER_2(cf, id, sample_fmt, name, long_name)                  \
+    PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
+#define PCM_DECODER_3(cf, id, sample_fmt, name, long_name)                  \
+    PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
+#define PCM_DECODER(id, sample_fmt, name, long_name)                        \
+    PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
+
+#define PCM_CODEC(id, sample_fmt_, name, long_name_)                    \
+    PCM_ENCODER(id, sample_fmt_, name, long_name_);                     \
+    PCM_DECODER(id, sample_fmt_, name, long_name_)
+
+/* Note: Do not forget to add new entries to the Makefile as well. */
+PCM_CODEC  (PCM_ALAW,         AV_SAMPLE_FMT_S16, pcm_alaw,         "PCM A-law");
+PCM_CODEC  (PCM_F32BE,        AV_SAMPLE_FMT_FLT, pcm_f32be,        "PCM 32-bit floating point big-endian");
+PCM_CODEC  (PCM_F32LE,        AV_SAMPLE_FMT_FLT, pcm_f32le,        "PCM 32-bit floating point little-endian");
+PCM_CODEC  (PCM_F64BE,        AV_SAMPLE_FMT_DBL, pcm_f64be,        "PCM 64-bit floating point big-endian");
+PCM_CODEC  (PCM_F64LE,        AV_SAMPLE_FMT_DBL, pcm_f64le,        "PCM 64-bit floating point little-endian");
+PCM_DECODER(PCM_LXF,          AV_SAMPLE_FMT_S32P, pcm_lxf,          "PCM signed 20-bit little-endian planar");
+PCM_CODEC  (PCM_MULAW,        AV_SAMPLE_FMT_S16, pcm_mulaw,        "PCM mu-law");
+PCM_CODEC  (PCM_S8,           AV_SAMPLE_FMT_U8,  pcm_s8,           "PCM signed 8-bit");
+PCM_CODEC  (PCM_S16BE,        AV_SAMPLE_FMT_S16, pcm_s16be,        "PCM signed 16-bit big-endian");
+PCM_CODEC  (PCM_S16LE,        AV_SAMPLE_FMT_S16, pcm_s16le,        "PCM signed 16-bit little-endian");
+PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16le_planar, "PCM 16-bit little-endian planar");
+PCM_CODEC  (PCM_S24BE,        AV_SAMPLE_FMT_S32, pcm_s24be,        "PCM signed 24-bit big-endian");
+PCM_CODEC  (PCM_S24DAUD,      AV_SAMPLE_FMT_S16, pcm_s24daud,      "PCM D-Cinema audio signed 24-bit");
+PCM_CODEC  (PCM_S24LE,        AV_SAMPLE_FMT_S32, pcm_s24le,        "PCM signed 24-bit little-endian");
+PCM_DECODER(PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
+PCM_CODEC  (PCM_S32BE,        AV_SAMPLE_FMT_S32, pcm_s32be,        "PCM signed 32-bit big-endian");
+PCM_CODEC  (PCM_S32LE,        AV_SAMPLE_FMT_S32, pcm_s32le,        "PCM signed 32-bit little-endian");
+PCM_DECODER(PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
+PCM_CODEC  (PCM_U8,           AV_SAMPLE_FMT_U8,  pcm_u8,           "PCM unsigned 8-bit");
+PCM_CODEC  (PCM_U16BE,        AV_SAMPLE_FMT_S16, pcm_u16be,        "PCM unsigned 16-bit big-endian");
+PCM_CODEC  (PCM_U16LE,        AV_SAMPLE_FMT_S16, pcm_u16le,        "PCM unsigned 16-bit little-endian");
+PCM_CODEC  (PCM_U24BE,        AV_SAMPLE_FMT_S32, pcm_u24be,        "PCM unsigned 24-bit big-endian");
+PCM_CODEC  (PCM_U24LE,        AV_SAMPLE_FMT_S32, pcm_u24le,        "PCM unsigned 24-bit little-endian");
+PCM_CODEC  (PCM_U32BE,        AV_SAMPLE_FMT_S32, pcm_u32be,        "PCM unsigned 32-bit big-endian");
+PCM_CODEC  (PCM_U32LE,        AV_SAMPLE_FMT_S32, pcm_u32le,        "PCM unsigned 32-bit little-endian");
+PCM_DECODER(PCM_ZORK,         AV_SAMPLE_FMT_U8,  pcm_zork,         "PCM Zork");