X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpegaudio.h;h=b55680100bd78b9bfadf29bb8314e3d767b24311;hb=0249144a1c5ca6054e4b7374b5dd24bcbe435239;hp=bf79d3b58c74352b0e85a0cbca7cf96c40457102;hpb=987903826b0dba2e134be200ac94be66b4a3acf1;p=ffmpeg

diff --git a/libavcodec/mpegaudio.h b/libavcodec/mpegaudio.h
index bf79d3b58c7..b55680100bd 100644
--- a/libavcodec/mpegaudio.h
+++ b/libavcodec/mpegaudio.h
@@ -1,34 +1,36 @@
 /*
  * copyright (c) 2001 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file mpegaudio.h
+ * @file
  * mpeg audio declarations for both encoder and decoder.
  */
 
 #ifndef AVCODEC_MPEGAUDIO_H
 #define AVCODEC_MPEGAUDIO_H
 
-#include "avcodec.h"
-#include "bitstream.h"
-#include "dsputil.h"
+#ifndef CONFIG_FLOAT
+#   define CONFIG_FLOAT 0
+#endif
+
+#include <stdint.h>
 
 /* max frame size, in samples */
 #define MPA_FRAME_SIZE 1152
@@ -45,111 +47,29 @@
 #define MPA_DUAL    2
 #define MPA_MONO    3
 
-/* header + layer + bitrate + freq + lsf/mpeg25 */
-#define SAME_HEADER_MASK \
-   (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19))
-
-#define MP3_MASK 0xFFFE0CCF
-
-/* define USE_HIGHPRECISION to have a bit exact (but slower) mpeg
-   audio decoder */
-
-#ifdef USE_HIGHPRECISION
+#ifndef FRAC_BITS
 #define FRAC_BITS   23   /* fractional bits for sb_samples and dct */
 #define WFRAC_BITS  16   /* fractional bits for window */
-#else
-#define FRAC_BITS   15   /* fractional bits for sb_samples and dct */
-#define WFRAC_BITS  14   /* fractional bits for window */
 #endif
 
 #define FRAC_ONE    (1 << FRAC_BITS)
 
 #define FIX(a)   ((int)((a) * FRAC_ONE))
 
-#if defined(USE_HIGHPRECISION) && defined(CONFIG_AUDIO_NONSHORT)
-typedef int32_t OUT_INT;
-#define OUT_MAX INT32_MAX
-#define OUT_MIN INT32_MIN
-#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 31)
-#else
-typedef int16_t OUT_INT;
-#define OUT_MAX INT16_MAX
-#define OUT_MIN INT16_MIN
-#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
-#endif
-
-#if FRAC_BITS <= 15
+#if CONFIG_FLOAT
+#   define INTFLOAT float
+typedef float MPA_INT;
+typedef float OUT_INT;
+#elif FRAC_BITS <= 15
+#   define INTFLOAT int
 typedef int16_t MPA_INT;
+typedef int16_t OUT_INT;
 #else
+#   define INTFLOAT int
 typedef int32_t MPA_INT;
+typedef int16_t OUT_INT;
 #endif
 
-#define BACKSTEP_SIZE 512
-#define EXTRABYTES 24
-
-struct GranuleDef;
-
-typedef struct MPADecodeContext {
-    DECLARE_ALIGNED_8(uint8_t, last_buf[2*BACKSTEP_SIZE + EXTRABYTES]);
-    int last_buf_size;
-    int frame_size;
-    /* next header (used in free format parsing) */
-    uint32_t free_format_next_header;
-    int error_protection;
-    int layer;
-    int sample_rate;
-    int sample_rate_index; /* between 0 and 8 */
-    int bit_rate;
-    GetBitContext gb;
-    GetBitContext in_gb;
-    int nb_channels;
-    int mode;
-    int mode_ext;
-    int lsf;
-    DECLARE_ALIGNED_16(MPA_INT, synth_buf[MPA_MAX_CHANNELS][512 * 2]);
-    int synth_buf_offset[MPA_MAX_CHANNELS];
-    DECLARE_ALIGNED_16(int32_t, sb_samples[MPA_MAX_CHANNELS][36][SBLIMIT]);
-    int32_t mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */
-#ifdef DEBUG
-    int frame_count;
-#endif
-    void (*compute_antialias)(struct MPADecodeContext *s, struct GranuleDef *g);
-    int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3
-    int dither_state;
-    int error_resilience;
-    AVCodecContext* avctx;
-} MPADecodeContext;
-
-/* layer 3 huffman tables */
-typedef struct HuffTable {
-    int xsize;
-    const uint8_t *bits;
-    const uint16_t *codes;
-} HuffTable;
-
 int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
-int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate);
-void ff_mpa_synth_init(MPA_INT *window);
-void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,
-                         MPA_INT *window, int *dither_state,
-                         OUT_INT *samples, int incr,
-                         int32_t sb_samples[SBLIMIT]);
-
-/* fast header check for resync */
-static inline int ff_mpa_check_header(uint32_t header){
-    /* header */
-    if ((header & 0xffe00000) != 0xffe00000)
-        return -1;
-    /* layer check */
-    if ((header & (3<<17)) == 0)
-        return -1;
-    /* bit rate */
-    if ((header & (0xf<<12)) == 0xf<<12)
-        return -1;
-    /* frequency */
-    if ((header & (3<<10)) == 3<<10)
-        return -1;
-    return 0;
-}
 
 #endif /* AVCODEC_MPEGAUDIO_H */