lavu: rename audioconvert.* to channel_layout.* and deprecate audioconvert.h
authorJustin Ruggles <justin.ruggles@gmail.com>
Sat, 10 Nov 2012 14:03:17 +0000 (09:03 -0500)
committerJustin Ruggles <justin.ruggles@gmail.com>
Sun, 11 Nov 2012 18:35:12 +0000 (13:35 -0500)
doc/APIchanges
libavutil/Makefile
libavutil/audioconvert.c [deleted file]
libavutil/audioconvert.h
libavutil/channel_layout.c [new file with mode: 0644]
libavutil/channel_layout.h [new file with mode: 0644]
libavutil/version.h

index c8b8fbf..a0756da 100644 (file)
@@ -13,6 +13,9 @@ libavutil:     2012-10-22
 
 API changes, most recent first:
 
+2012-xx-xx - xxxxxxx - lavu 52.2.0 - audioconvert.h
+  Rename audioconvert.h to channel_layout.h. audioconvert.h is now deprecated.
+
 2012-xx-xx - xxxxxxx - lavu 52.1.0 - intmath.h
   Add av_ctz() for trailing zero bit count
 
index d4ffd5e..48a0e16 100644 (file)
@@ -11,6 +11,7 @@ HEADERS = adler32.h                                                     \
           base64.h                                                      \
           blowfish.h                                                    \
           bswap.h                                                       \
+          channel_layout.h                                              \
           common.h                                                      \
           cpu.h                                                         \
           crc.h                                                         \
@@ -53,10 +54,10 @@ BUILT_HEADERS = avconfig.h
 OBJS = adler32.o                                                        \
        aes.o                                                            \
        audio_fifo.o                                                     \
-       audioconvert.o                                                   \
        avstring.o                                                       \
        base64.o                                                         \
        blowfish.o                                                       \
+       channel_layout.o                                                 \
        cpu.o                                                            \
        crc.o                                                            \
        des.o                                                            \
diff --git a/libavutil/audioconvert.c b/libavutil/audioconvert.c
deleted file mode 100644 (file)
index 113b9d7..0000000
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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 2.1 of the License, or (at your option) any later version.
- *
- * 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * audio conversion routines
- */
-
-#include "avstring.h"
-#include "avutil.h"
-#include "audioconvert.h"
-#include "common.h"
-
-static const char * const channel_names[] = {
-    [0]  = "FL",        /* front left */
-    [1]  = "FR",        /* front right */
-    [2]  = "FC",        /* front center */
-    [3]  = "LFE",       /* low frequency */
-    [4]  = "BL",        /* back left */
-    [5]  = "BR",        /* back right */
-    [6]  = "FLC",       /* front left-of-center  */
-    [7]  = "FRC",       /* front right-of-center */
-    [8]  = "BC",        /* back-center */
-    [9]  = "SL",        /* side left */
-    [10] = "SR",        /* side right */
-    [11] = "TC",        /* top center */
-    [12] = "TFL",       /* top front left */
-    [13] = "TFC",       /* top front center */
-    [14] = "TFR",       /* top front right */
-    [15] = "TBL",       /* top back left */
-    [16] = "TBC",       /* top back center */
-    [17] = "TBR",       /* top back right */
-    [29] = "DL",        /* downmix left */
-    [30] = "DR",        /* downmix right */
-    [31] = "WL",        /* wide left */
-    [32] = "WR",        /* wide right */
-    [33] = "SDL",       /* surround direct left */
-    [34] = "SDR",       /* surround direct right */
-    [35] = "LFE2",      /* low frequency 2 */
-};
-
-static const char *get_channel_name(int channel_id)
-{
-    if (channel_id < 0 || channel_id >= FF_ARRAY_ELEMS(channel_names))
-        return NULL;
-    return channel_names[channel_id];
-}
-
-static const struct {
-    const char *name;
-    int         nb_channels;
-    uint64_t     layout;
-} channel_layout_map[] = {
-    { "mono",        1,  AV_CH_LAYOUT_MONO },
-    { "stereo",      2,  AV_CH_LAYOUT_STEREO },
-    { "stereo",      2,  AV_CH_LAYOUT_STEREO_DOWNMIX },
-    { "2.1",         3,  AV_CH_LAYOUT_2POINT1 },
-    { "3.0",         3,  AV_CH_LAYOUT_SURROUND },
-    { "3.0(back)",   3,  AV_CH_LAYOUT_2_1 },
-    { "3.1",         4,  AV_CH_LAYOUT_3POINT1 },
-    { "4.0",         4,  AV_CH_LAYOUT_4POINT0 },
-    { "quad",        4,  AV_CH_LAYOUT_QUAD },
-    { "quad(side)",  4,  AV_CH_LAYOUT_2_2 },
-    { "4.1",         5,  AV_CH_LAYOUT_4POINT1 },
-    { "5.0",         5,  AV_CH_LAYOUT_5POINT0 },
-    { "5.0",         5,  AV_CH_LAYOUT_5POINT0_BACK },
-    { "5.1",         6,  AV_CH_LAYOUT_5POINT1 },
-    { "5.1",         6,  AV_CH_LAYOUT_5POINT1_BACK },
-    { "6.0",         6,  AV_CH_LAYOUT_6POINT0 },
-    { "6.0(front)",  6,  AV_CH_LAYOUT_6POINT0_FRONT },
-    { "hexagonal",   6,  AV_CH_LAYOUT_HEXAGONAL },
-    { "6.1",         7,  AV_CH_LAYOUT_6POINT1 },
-    { "6.1",         7,  AV_CH_LAYOUT_6POINT1_BACK },
-    { "6.1(front)",  7,  AV_CH_LAYOUT_6POINT1_FRONT },
-    { "7.0",         7,  AV_CH_LAYOUT_7POINT0 },
-    { "7.0(front)",  7,  AV_CH_LAYOUT_7POINT0_FRONT },
-    { "7.1",         8,  AV_CH_LAYOUT_7POINT1 },
-    { "7.1(wide)",   8,  AV_CH_LAYOUT_7POINT1_WIDE },
-    { "7.1(wide)",   8,  AV_CH_LAYOUT_7POINT1_WIDE_BACK },
-    { "octagonal",   8,  AV_CH_LAYOUT_OCTAGONAL },
-    { "downmix",     2,  AV_CH_LAYOUT_STEREO_DOWNMIX, },
-    { 0 }
-};
-
-static uint64_t get_channel_layout_single(const char *name, int name_len)
-{
-    int i;
-    char *end;
-    int64_t layout;
-
-    for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map) - 1; i++) {
-        if (strlen(channel_layout_map[i].name) == name_len &&
-            !memcmp(channel_layout_map[i].name, name, name_len))
-            return channel_layout_map[i].layout;
-    }
-    for (i = 0; i < FF_ARRAY_ELEMS(channel_names); i++)
-        if (channel_names[i] &&
-            strlen(channel_names[i]) == name_len &&
-            !memcmp(channel_names[i], name, name_len))
-            return (int64_t)1 << i;
-    i = strtol(name, &end, 10);
-    if (end - name == name_len ||
-        (end + 1 - name == name_len && *end  == 'c'))
-        return av_get_default_channel_layout(i);
-    layout = strtoll(name, &end, 0);
-    if (end - name == name_len)
-        return FFMAX(layout, 0);
-    return 0;
-}
-
-uint64_t av_get_channel_layout(const char *name)
-{
-    const char *n, *e;
-    const char *name_end = name + strlen(name);
-    int64_t layout = 0, layout_single;
-
-    for (n = name; n < name_end; n = e + 1) {
-        for (e = n; e < name_end && *e != '+' && *e != '|'; e++);
-        layout_single = get_channel_layout_single(n, e - n);
-        if (!layout_single)
-            return 0;
-        layout |= layout_single;
-    }
-    return layout;
-}
-
-void av_get_channel_layout_string(char *buf, int buf_size,
-                                  int nb_channels, uint64_t channel_layout)
-{
-    int i;
-
-    if (nb_channels <= 0)
-        nb_channels = av_get_channel_layout_nb_channels(channel_layout);
-
-    for (i = 0; channel_layout_map[i].name; i++)
-        if (nb_channels    == channel_layout_map[i].nb_channels &&
-            channel_layout == channel_layout_map[i].layout) {
-            av_strlcpy(buf, channel_layout_map[i].name, buf_size);
-            return;
-        }
-
-    snprintf(buf, buf_size, "%d channels", nb_channels);
-    if (channel_layout) {
-        int i, ch;
-        av_strlcat(buf, " (", buf_size);
-        for (i = 0, ch = 0; i < 64; i++) {
-            if ((channel_layout & (UINT64_C(1) << i))) {
-                const char *name = get_channel_name(i);
-                if (name) {
-                    if (ch > 0)
-                        av_strlcat(buf, "|", buf_size);
-                    av_strlcat(buf, name, buf_size);
-                }
-                ch++;
-            }
-        }
-        av_strlcat(buf, ")", buf_size);
-    }
-}
-
-int av_get_channel_layout_nb_channels(uint64_t channel_layout)
-{
-    return av_popcount64(channel_layout);
-}
-
-uint64_t av_get_default_channel_layout(int nb_channels)
-{
-    switch(nb_channels) {
-    case 1: return AV_CH_LAYOUT_MONO;
-    case 2: return AV_CH_LAYOUT_STEREO;
-    case 3: return AV_CH_LAYOUT_SURROUND;
-    case 4: return AV_CH_LAYOUT_QUAD;
-    case 5: return AV_CH_LAYOUT_5POINT0;
-    case 6: return AV_CH_LAYOUT_5POINT1;
-    case 7: return AV_CH_LAYOUT_6POINT1;
-    case 8: return AV_CH_LAYOUT_7POINT1;
-    default: return 0;
-    }
-}
-
-int av_get_channel_layout_channel_index(uint64_t channel_layout,
-                                        uint64_t channel)
-{
-    if (!(channel_layout & channel) ||
-        av_get_channel_layout_nb_channels(channel) != 1)
-        return AVERROR(EINVAL);
-    channel_layout &= channel - 1;
-    return av_get_channel_layout_nb_channels(channel_layout);
-}
-
-const char *av_get_channel_name(uint64_t channel)
-{
-    int i;
-    if (av_get_channel_layout_nb_channels(channel) != 1)
-        return NULL;
-    for (i = 0; i < 64; i++)
-        if ((1ULL<<i) & channel)
-            return get_channel_name(i);
-    return NULL;
-}
-
-uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
-{
-    int i;
-
-    if (av_get_channel_layout_nb_channels(channel_layout) <= index)
-        return 0;
-
-    for (i = 0; i < 64; i++) {
-        if ((1ULL << i) & channel_layout && !index--)
-            return 1ULL << i;
-    }
-    return 0;
-}
index 73076cb..300a67c 100644 (file)
@@ -1,182 +1,6 @@
-/*
- * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- * Copyright (c) 2008 Peter Ross
- *
- * 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 2.1 of the License, or (at your option) any later version.
- *
- * 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
 
-#ifndef AVUTIL_AUDIOCONVERT_H
-#define AVUTIL_AUDIOCONVERT_H
+#include "version.h"
 
-#include <stdint.h>
-
-/**
- * @file
- * audio conversion routines
- */
-
-/**
- * @addtogroup lavu_audio
- * @{
- */
-
-/**
- * @defgroup channel_masks Audio channel masks
- * @{
- */
-#define AV_CH_FRONT_LEFT             0x00000001
-#define AV_CH_FRONT_RIGHT            0x00000002
-#define AV_CH_FRONT_CENTER           0x00000004
-#define AV_CH_LOW_FREQUENCY          0x00000008
-#define AV_CH_BACK_LEFT              0x00000010
-#define AV_CH_BACK_RIGHT             0x00000020
-#define AV_CH_FRONT_LEFT_OF_CENTER   0x00000040
-#define AV_CH_FRONT_RIGHT_OF_CENTER  0x00000080
-#define AV_CH_BACK_CENTER            0x00000100
-#define AV_CH_SIDE_LEFT              0x00000200
-#define AV_CH_SIDE_RIGHT             0x00000400
-#define AV_CH_TOP_CENTER             0x00000800
-#define AV_CH_TOP_FRONT_LEFT         0x00001000
-#define AV_CH_TOP_FRONT_CENTER       0x00002000
-#define AV_CH_TOP_FRONT_RIGHT        0x00004000
-#define AV_CH_TOP_BACK_LEFT          0x00008000
-#define AV_CH_TOP_BACK_CENTER        0x00010000
-#define AV_CH_TOP_BACK_RIGHT         0x00020000
-#define AV_CH_STEREO_LEFT            0x20000000  ///< Stereo downmix.
-#define AV_CH_STEREO_RIGHT           0x40000000  ///< See AV_CH_STEREO_LEFT.
-#define AV_CH_WIDE_LEFT              0x0000000080000000ULL
-#define AV_CH_WIDE_RIGHT             0x0000000100000000ULL
-#define AV_CH_SURROUND_DIRECT_LEFT   0x0000000200000000ULL
-#define AV_CH_SURROUND_DIRECT_RIGHT  0x0000000400000000ULL
-#define AV_CH_LOW_FREQUENCY_2        0x0000000800000000ULL
-
-/** Channel mask value used for AVCodecContext.request_channel_layout
-    to indicate that the user requests the channel order of the decoder output
-    to be the native codec channel order. */
-#define AV_CH_LAYOUT_NATIVE          0x8000000000000000ULL
-
-/**
- * @}
- * @defgroup channel_mask_c Audio channel convenience macros
- * @{
- * */
-#define AV_CH_LAYOUT_MONO              (AV_CH_FRONT_CENTER)
-#define AV_CH_LAYOUT_STEREO            (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
-#define AV_CH_LAYOUT_2POINT1           (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_2_1               (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_SURROUND          (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
-#define AV_CH_LAYOUT_3POINT1           (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_4POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_4POINT1           (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_2_2               (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
-#define AV_CH_LAYOUT_QUAD              (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
-#define AV_CH_LAYOUT_5POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
-#define AV_CH_LAYOUT_5POINT1           (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_5POINT0_BACK      (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
-#define AV_CH_LAYOUT_5POINT1_BACK      (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_6POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_6POINT0_FRONT     (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
-#define AV_CH_LAYOUT_HEXAGONAL         (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_6POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_6POINT1_BACK      (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
-#define AV_CH_LAYOUT_6POINT1_FRONT     (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
-#define AV_CH_LAYOUT_7POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
-#define AV_CH_LAYOUT_7POINT0_FRONT     (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
-#define AV_CH_LAYOUT_7POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
-#define AV_CH_LAYOUT_7POINT1_WIDE      (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
-#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
-#define AV_CH_LAYOUT_OCTAGONAL         (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
-#define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
-
-enum AVMatrixEncoding {
-    AV_MATRIX_ENCODING_NONE,
-    AV_MATRIX_ENCODING_DOLBY,
-    AV_MATRIX_ENCODING_DPLII,
-    AV_MATRIX_ENCODING_NB
-};
-
-/**
- * @}
- */
-
-/**
- * Return a channel layout id that matches name, or 0 if no match is found.
- *
- * name can be one or several of the following notations,
- * separated by '+' or '|':
- * - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
- *   5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
- * - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
- *   SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
- * - a number of channels, in decimal, optionally followed by 'c', yielding
- *   the default channel layout for that number of channels (@see
- *   av_get_default_channel_layout);
- * - a channel layout mask, in hexadecimal starting with "0x" (see the
- *   AV_CH_* macros).
- *
- * Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
- */
-uint64_t av_get_channel_layout(const char *name);
-
-/**
- * Return a description of a channel layout.
- * If nb_channels is <= 0, it is guessed from the channel_layout.
- *
- * @param buf put here the string containing the channel layout
- * @param buf_size size in bytes of the buffer
- */
-void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout);
-
-/**
- * Return the number of channels in the channel layout.
- */
-int av_get_channel_layout_nb_channels(uint64_t channel_layout);
-
-/**
- * Return default channel layout for a given number of channels.
- */
-uint64_t av_get_default_channel_layout(int nb_channels);
-
-/**
- * Get the index of a channel in channel_layout.
- *
- * @param channel a channel layout describing exactly one channel which must be
- *                present in channel_layout.
- *
- * @return index of channel in channel_layout on success, a negative AVERROR
- *         on error.
- */
-int av_get_channel_layout_channel_index(uint64_t channel_layout,
-                                        uint64_t channel);
-
-/**
- * Get the channel with the given index in channel_layout.
- */
-uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
-
-/**
- * Get the name of a given channel.
- *
- * @return channel name on success, NULL on error.
- */
-const char *av_get_channel_name(uint64_t channel);
-
-/**
- * @}
- */
-
-#endif /* AVUTIL_AUDIOCONVERT_H */
+#if FF_API_AUDIOCONVERT
+#include "channel_layout.h"
+#endif
diff --git a/libavutil/channel_layout.c b/libavutil/channel_layout.c
new file mode 100644 (file)
index 0000000..79e398e
--- /dev/null
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * audio channel layout utility functions
+ */
+
+#include "avstring.h"
+#include "avutil.h"
+#include "channel_layout.h"
+#include "common.h"
+
+static const char * const channel_names[] = {
+    [0]  = "FL",        /* front left */
+    [1]  = "FR",        /* front right */
+    [2]  = "FC",        /* front center */
+    [3]  = "LFE",       /* low frequency */
+    [4]  = "BL",        /* back left */
+    [5]  = "BR",        /* back right */
+    [6]  = "FLC",       /* front left-of-center  */
+    [7]  = "FRC",       /* front right-of-center */
+    [8]  = "BC",        /* back-center */
+    [9]  = "SL",        /* side left */
+    [10] = "SR",        /* side right */
+    [11] = "TC",        /* top center */
+    [12] = "TFL",       /* top front left */
+    [13] = "TFC",       /* top front center */
+    [14] = "TFR",       /* top front right */
+    [15] = "TBL",       /* top back left */
+    [16] = "TBC",       /* top back center */
+    [17] = "TBR",       /* top back right */
+    [29] = "DL",        /* downmix left */
+    [30] = "DR",        /* downmix right */
+    [31] = "WL",        /* wide left */
+    [32] = "WR",        /* wide right */
+    [33] = "SDL",       /* surround direct left */
+    [34] = "SDR",       /* surround direct right */
+    [35] = "LFE2",      /* low frequency 2 */
+};
+
+static const char *get_channel_name(int channel_id)
+{
+    if (channel_id < 0 || channel_id >= FF_ARRAY_ELEMS(channel_names))
+        return NULL;
+    return channel_names[channel_id];
+}
+
+static const struct {
+    const char *name;
+    int         nb_channels;
+    uint64_t     layout;
+} channel_layout_map[] = {
+    { "mono",        1,  AV_CH_LAYOUT_MONO },
+    { "stereo",      2,  AV_CH_LAYOUT_STEREO },
+    { "stereo",      2,  AV_CH_LAYOUT_STEREO_DOWNMIX },
+    { "2.1",         3,  AV_CH_LAYOUT_2POINT1 },
+    { "3.0",         3,  AV_CH_LAYOUT_SURROUND },
+    { "3.0(back)",   3,  AV_CH_LAYOUT_2_1 },
+    { "3.1",         4,  AV_CH_LAYOUT_3POINT1 },
+    { "4.0",         4,  AV_CH_LAYOUT_4POINT0 },
+    { "quad",        4,  AV_CH_LAYOUT_QUAD },
+    { "quad(side)",  4,  AV_CH_LAYOUT_2_2 },
+    { "4.1",         5,  AV_CH_LAYOUT_4POINT1 },
+    { "5.0",         5,  AV_CH_LAYOUT_5POINT0 },
+    { "5.0",         5,  AV_CH_LAYOUT_5POINT0_BACK },
+    { "5.1",         6,  AV_CH_LAYOUT_5POINT1 },
+    { "5.1",         6,  AV_CH_LAYOUT_5POINT1_BACK },
+    { "6.0",         6,  AV_CH_LAYOUT_6POINT0 },
+    { "6.0(front)",  6,  AV_CH_LAYOUT_6POINT0_FRONT },
+    { "hexagonal",   6,  AV_CH_LAYOUT_HEXAGONAL },
+    { "6.1",         7,  AV_CH_LAYOUT_6POINT1 },
+    { "6.1",         7,  AV_CH_LAYOUT_6POINT1_BACK },
+    { "6.1(front)",  7,  AV_CH_LAYOUT_6POINT1_FRONT },
+    { "7.0",         7,  AV_CH_LAYOUT_7POINT0 },
+    { "7.0(front)",  7,  AV_CH_LAYOUT_7POINT0_FRONT },
+    { "7.1",         8,  AV_CH_LAYOUT_7POINT1 },
+    { "7.1(wide)",   8,  AV_CH_LAYOUT_7POINT1_WIDE },
+    { "7.1(wide)",   8,  AV_CH_LAYOUT_7POINT1_WIDE_BACK },
+    { "octagonal",   8,  AV_CH_LAYOUT_OCTAGONAL },
+    { "downmix",     2,  AV_CH_LAYOUT_STEREO_DOWNMIX, },
+    { 0 }
+};
+
+static uint64_t get_channel_layout_single(const char *name, int name_len)
+{
+    int i;
+    char *end;
+    int64_t layout;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map) - 1; i++) {
+        if (strlen(channel_layout_map[i].name) == name_len &&
+            !memcmp(channel_layout_map[i].name, name, name_len))
+            return channel_layout_map[i].layout;
+    }
+    for (i = 0; i < FF_ARRAY_ELEMS(channel_names); i++)
+        if (channel_names[i] &&
+            strlen(channel_names[i]) == name_len &&
+            !memcmp(channel_names[i], name, name_len))
+            return (int64_t)1 << i;
+    i = strtol(name, &end, 10);
+    if (end - name == name_len ||
+        (end + 1 - name == name_len && *end  == 'c'))
+        return av_get_default_channel_layout(i);
+    layout = strtoll(name, &end, 0);
+    if (end - name == name_len)
+        return FFMAX(layout, 0);
+    return 0;
+}
+
+uint64_t av_get_channel_layout(const char *name)
+{
+    const char *n, *e;
+    const char *name_end = name + strlen(name);
+    int64_t layout = 0, layout_single;
+
+    for (n = name; n < name_end; n = e + 1) {
+        for (e = n; e < name_end && *e != '+' && *e != '|'; e++);
+        layout_single = get_channel_layout_single(n, e - n);
+        if (!layout_single)
+            return 0;
+        layout |= layout_single;
+    }
+    return layout;
+}
+
+void av_get_channel_layout_string(char *buf, int buf_size,
+                                  int nb_channels, uint64_t channel_layout)
+{
+    int i;
+
+    if (nb_channels <= 0)
+        nb_channels = av_get_channel_layout_nb_channels(channel_layout);
+
+    for (i = 0; channel_layout_map[i].name; i++)
+        if (nb_channels    == channel_layout_map[i].nb_channels &&
+            channel_layout == channel_layout_map[i].layout) {
+            av_strlcpy(buf, channel_layout_map[i].name, buf_size);
+            return;
+        }
+
+    snprintf(buf, buf_size, "%d channels", nb_channels);
+    if (channel_layout) {
+        int i, ch;
+        av_strlcat(buf, " (", buf_size);
+        for (i = 0, ch = 0; i < 64; i++) {
+            if ((channel_layout & (UINT64_C(1) << i))) {
+                const char *name = get_channel_name(i);
+                if (name) {
+                    if (ch > 0)
+                        av_strlcat(buf, "|", buf_size);
+                    av_strlcat(buf, name, buf_size);
+                }
+                ch++;
+            }
+        }
+        av_strlcat(buf, ")", buf_size);
+    }
+}
+
+int av_get_channel_layout_nb_channels(uint64_t channel_layout)
+{
+    return av_popcount64(channel_layout);
+}
+
+uint64_t av_get_default_channel_layout(int nb_channels)
+{
+    switch(nb_channels) {
+    case 1: return AV_CH_LAYOUT_MONO;
+    case 2: return AV_CH_LAYOUT_STEREO;
+    case 3: return AV_CH_LAYOUT_SURROUND;
+    case 4: return AV_CH_LAYOUT_QUAD;
+    case 5: return AV_CH_LAYOUT_5POINT0;
+    case 6: return AV_CH_LAYOUT_5POINT1;
+    case 7: return AV_CH_LAYOUT_6POINT1;
+    case 8: return AV_CH_LAYOUT_7POINT1;
+    default: return 0;
+    }
+}
+
+int av_get_channel_layout_channel_index(uint64_t channel_layout,
+                                        uint64_t channel)
+{
+    if (!(channel_layout & channel) ||
+        av_get_channel_layout_nb_channels(channel) != 1)
+        return AVERROR(EINVAL);
+    channel_layout &= channel - 1;
+    return av_get_channel_layout_nb_channels(channel_layout);
+}
+
+const char *av_get_channel_name(uint64_t channel)
+{
+    int i;
+    if (av_get_channel_layout_nb_channels(channel) != 1)
+        return NULL;
+    for (i = 0; i < 64; i++)
+        if ((1ULL<<i) & channel)
+            return get_channel_name(i);
+    return NULL;
+}
+
+uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
+{
+    int i;
+
+    if (av_get_channel_layout_nb_channels(channel_layout) <= index)
+        return 0;
+
+    for (i = 0; i < 64; i++) {
+        if ((1ULL << i) & channel_layout && !index--)
+            return 1ULL << i;
+    }
+    return 0;
+}
diff --git a/libavutil/channel_layout.h b/libavutil/channel_layout.h
new file mode 100644 (file)
index 0000000..15b6887
--- /dev/null
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CHANNEL_LAYOUT_H
+#define AVUTIL_CHANNEL_LAYOUT_H
+
+#include <stdint.h>
+
+/**
+ * @file
+ * audio channel layout utility functions
+ */
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ */
+
+/**
+ * @defgroup channel_masks Audio channel masks
+ * @{
+ */
+#define AV_CH_FRONT_LEFT             0x00000001
+#define AV_CH_FRONT_RIGHT            0x00000002
+#define AV_CH_FRONT_CENTER           0x00000004
+#define AV_CH_LOW_FREQUENCY          0x00000008
+#define AV_CH_BACK_LEFT              0x00000010
+#define AV_CH_BACK_RIGHT             0x00000020
+#define AV_CH_FRONT_LEFT_OF_CENTER   0x00000040
+#define AV_CH_FRONT_RIGHT_OF_CENTER  0x00000080
+#define AV_CH_BACK_CENTER            0x00000100
+#define AV_CH_SIDE_LEFT              0x00000200
+#define AV_CH_SIDE_RIGHT             0x00000400
+#define AV_CH_TOP_CENTER             0x00000800
+#define AV_CH_TOP_FRONT_LEFT         0x00001000
+#define AV_CH_TOP_FRONT_CENTER       0x00002000
+#define AV_CH_TOP_FRONT_RIGHT        0x00004000
+#define AV_CH_TOP_BACK_LEFT          0x00008000
+#define AV_CH_TOP_BACK_CENTER        0x00010000
+#define AV_CH_TOP_BACK_RIGHT         0x00020000
+#define AV_CH_STEREO_LEFT            0x20000000  ///< Stereo downmix.
+#define AV_CH_STEREO_RIGHT           0x40000000  ///< See AV_CH_STEREO_LEFT.
+#define AV_CH_WIDE_LEFT              0x0000000080000000ULL
+#define AV_CH_WIDE_RIGHT             0x0000000100000000ULL
+#define AV_CH_SURROUND_DIRECT_LEFT   0x0000000200000000ULL
+#define AV_CH_SURROUND_DIRECT_RIGHT  0x0000000400000000ULL
+#define AV_CH_LOW_FREQUENCY_2        0x0000000800000000ULL
+
+/** Channel mask value used for AVCodecContext.request_channel_layout
+    to indicate that the user requests the channel order of the decoder output
+    to be the native codec channel order. */
+#define AV_CH_LAYOUT_NATIVE          0x8000000000000000ULL
+
+/**
+ * @}
+ * @defgroup channel_mask_c Audio channel convenience macros
+ * @{
+ * */
+#define AV_CH_LAYOUT_MONO              (AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_STEREO            (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
+#define AV_CH_LAYOUT_2POINT1           (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_1               (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_SURROUND          (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_3POINT1           (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_4POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_4POINT1           (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_2               (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_QUAD              (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_5POINT1           (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_5POINT0_BACK      (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1_BACK      (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_6POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT0_FRONT     (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_HEXAGONAL         (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_BACK      (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_FRONT     (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_7POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT0_FRONT     (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1_WIDE      (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_OCTAGONAL         (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
+
+enum AVMatrixEncoding {
+    AV_MATRIX_ENCODING_NONE,
+    AV_MATRIX_ENCODING_DOLBY,
+    AV_MATRIX_ENCODING_DPLII,
+    AV_MATRIX_ENCODING_NB
+};
+
+/**
+ * @}
+ */
+
+/**
+ * Return a channel layout id that matches name, or 0 if no match is found.
+ *
+ * name can be one or several of the following notations,
+ * separated by '+' or '|':
+ * - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
+ *   5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
+ * - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
+ *   SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
+ * - a number of channels, in decimal, optionally followed by 'c', yielding
+ *   the default channel layout for that number of channels (@see
+ *   av_get_default_channel_layout);
+ * - a channel layout mask, in hexadecimal starting with "0x" (see the
+ *   AV_CH_* macros).
+ *
+ * Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
+ */
+uint64_t av_get_channel_layout(const char *name);
+
+/**
+ * Return a description of a channel layout.
+ * If nb_channels is <= 0, it is guessed from the channel_layout.
+ *
+ * @param buf put here the string containing the channel layout
+ * @param buf_size size in bytes of the buffer
+ */
+void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout);
+
+/**
+ * Return the number of channels in the channel layout.
+ */
+int av_get_channel_layout_nb_channels(uint64_t channel_layout);
+
+/**
+ * Return default channel layout for a given number of channels.
+ */
+uint64_t av_get_default_channel_layout(int nb_channels);
+
+/**
+ * Get the index of a channel in channel_layout.
+ *
+ * @param channel a channel layout describing exactly one channel which must be
+ *                present in channel_layout.
+ *
+ * @return index of channel in channel_layout on success, a negative AVERROR
+ *         on error.
+ */
+int av_get_channel_layout_channel_index(uint64_t channel_layout,
+                                        uint64_t channel);
+
+/**
+ * Get the channel with the given index in channel_layout.
+ */
+uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
+
+/**
+ * Get the name of a given channel.
+ *
+ * @return channel name on success, NULL on error.
+ */
+const char *av_get_channel_name(uint64_t channel);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CHANNEL_LAYOUT_H */
index 1659dbd..6f79eeb 100644 (file)
@@ -37,7 +37,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 52
-#define LIBAVUTIL_VERSION_MINOR  1
+#define LIBAVUTIL_VERSION_MINOR  2
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
@@ -73,6 +73,9 @@
 #ifndef FF_API_AV_REVERSE
 #define FF_API_AV_REVERSE               (LIBAVUTIL_VERSION_MAJOR < 53)
 #endif
+#ifndef FF_API_AUDIOCONVERT
+#define FF_API_AUDIOCONVERT             (LIBAVUTIL_VERSION_MAJOR < 53)
+#endif
 
 /**
  * @}