libaac+ support

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -72,6 +72,7 @@ version 0.8:
 - Demuxer for On2's IVF format
 - Pictor/PC Paint decoder
 - HE-AAC v2 decoder
+- HE-AAC v2 encoding with libaacplus
 - libfaad2 wrapper removed
 - DTS-ES extension (XCh) decoding support
 - native VP8 decoder

LICENSE

@@ -41,6 +41,6 @@ is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of
 those licenses. So to combine the OpenCORE libraries with FFmpeg, the license
 version needs to be upgraded by passing --enable-version3 to configure.
 
-The nonfree external library libfaac can be hooked up in FFmpeg. You need to
+The nonfree external libraries libfaac and libaacplus can be hooked up in FFmpeg.
-pass --enable-nonfree to configure to enable it. Employ this option with care
+You need to pass --enable-nonfree to configure to enable it. Employ this option
-as FFmpeg then becomes nonfree and unredistributable.
+with care as FFmpeg then becomes nonfree and unredistributable.

configure

@@ -165,6 +165,7 @@ External library support:
   --enable-bzlib           enable bzlib [autodetect]
   --enable-libcelt         enable CELT/Opus decoding via libcelt [no]
   --enable-frei0r          enable frei0r video filtering
+  --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
   --enable-libopencv       enable video filtering via libopencv [no]
@@ -994,6 +995,7 @@ CONFIG_LIST="
     h264pred
     hardcoded_tables
     huffman
+    libaacplus
     libcdio
     libcelt
     libdc1394
@@ -1483,6 +1485,7 @@ vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
 h264_parser_select="golomb h264dsp h264pred"
 
 # external libraries
+libaacplus_encoder_deps="libaacplus"
 libcelt_decoder_deps="libcelt"
 libdirac_decoder_deps="libdirac !libschroedinger"
 libdirac_encoder_deps="libdirac"
@@ -2687,6 +2690,7 @@ die_license_disabled gpl libxavs
 die_license_disabled gpl libxvid
 die_license_disabled gpl x11grab
 
+die_license_disabled nonfree libaacplus
 die_license_disabled nonfree libfaac
 
 die_license_disabled version3 libopencore_amrnb
@@ -3008,6 +3012,7 @@ check_mathfunc truncf
 enabled avisynth   && require2 vfw32 "windows.h vfw.h" AVIFileInit -lavifil32
 enabled libcelt    && require libcelt celt/celt.h celt_decode -lcelt0
 enabled frei0r     && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
+enabled libaacplus && require  "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
 enabled libdc1394  && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
 enabled libdirac   && require_pkg_config dirac                          \
     "libdirac_decoder/dirac_parser.h libdirac_encoder/dirac_encoder.h"  \
@@ -3339,6 +3344,7 @@ echo "libcdio support           ${libcdio-no}"
 echo "libdc1394 support         ${libdc1394-no}"
 echo "libdirac enabled          ${libdirac-no}"
 echo "libfaac enabled           ${libfaac-no}"
+echo "libaacplus enabled        ${libaacplus-no}"
 echo "libgsm enabled            ${libgsm-no}"
 echo "libmp3lame enabled        ${libmp3lame-no}"
 echo "libnut enabled            ${libnut-no}"

doc/general.texi

@@ -559,6 +559,8 @@ following image formats are supported:
 @multitable @columnfractions .4 .1 .1 .4
 @item Name @tab Encoding @tab Decoding @tab Comments
 @item 8SVX audio             @tab     @tab  X
+@item AAC+                   @tab  E  @tab  X
+    @tab encoding supported through external library libaacplus
 @item AAC                    @tab  E  @tab  X
     @tab encoding supported through external library libfaac and libvo-aacenc
 @item AC-3                   @tab IX  @tab  X
@@ -1105,7 +1107,7 @@ These library packages are only available from
 @uref{http://sourceware.org/cygwinports/, Cygwin Ports}:
 
 @example
-yasm, libSDL-devel, libdirac-devel, libfaac-devel, libgsm-devel,
+yasm, libSDL-devel, libdirac-devel, libfaac-devel, libaacplus-devel, libgsm-devel,
 libmp3lame-devel, libschroedinger1.0-devel, speex-devel, libtheora-devel,
 libxvidcore-devel
 @end example

libavcodec/Makefile

@@ -579,6 +579,7 @@ OBJS-$(CONFIG_WEBM_MUXER)              += xiph.o mpeg4audio.o \
 OBJS-$(CONFIG_WTV_DEMUXER)             += mpeg4audio.o mpegaudiodata.o
 
 # external codec libraries
+OBJS-$(CONFIG_LIBAACPLUS_ENCODER)         += libaacplus.o
 OBJS-$(CONFIG_LIBCELT_DECODER)            += libcelt_dec.o
 OBJS-$(CONFIG_LIBDIRAC_DECODER)           += libdiracdec.o
 OBJS-$(CONFIG_LIBDIRAC_ENCODER)           += libdiracenc.o libdirac_libschro.o

libavcodec/allcodecs.c

@@ -374,6 +374,7 @@ void avcodec_register_all(void)
     REGISTER_ENCDEC  (XSUB, xsub);
 
     /* external libraries */
+    REGISTER_ENCODER (LIBAACPLUS, libaacplus);
     REGISTER_DECODER (LIBCELT, libcelt);
     REGISTER_ENCDEC  (LIBDIRAC, libdirac);
     REGISTER_ENCODER (LIBFAAC, libfaac);

libavcodec/libaacplus.c

@@ -0,0 +1,136 @@
+/*
+ * Interface to libaacplus for aac+ (sbr+ps) encoding
+ * Copyright (c) 2010 tipok <piratfm@gmail.com>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Interface to libaacplus for aac+ (sbr+ps) encoding.
+ */
+
+#include "avcodec.h"
+#include <aacplus.h>
+
+typedef struct aacPlusAudioContext {
+    aacplusEncHandle aacplus_handle;
+} aacPlusAudioContext;
+
+static av_cold int aacPlus_encode_init(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    aacplusEncConfiguration *aacplus_cfg;
+    unsigned long samples_input, max_bytes_output;
+
+    /* number of channels */
+    if (avctx->channels < 1 || avctx->channels > 2) {
+        av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
+        return -1;
+    }
+
+    s->aacplus_handle = aacplusEncOpen(avctx->sample_rate,
+                                 avctx->channels,
+                                 &samples_input, &max_bytes_output);
+    if(!s->aacplus_handle) {
+            av_log(avctx, AV_LOG_ERROR, "can't open encoder\n");
+            return -1;
+    }
+
+    /* check aacplus version */
+    aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle);
+
+    /* put the options in the configuration struct */
+    if(avctx->profile != FF_PROFILE_AAC_LOW && avctx->profile != FF_PROFILE_UNKNOWN) {
+            av_log(avctx, AV_LOG_ERROR, "invalid AAC profile: %d, only LC supported\n", avctx->profile);
+            aacplusEncClose(s->aacplus_handle);
+            return -1;
+    }
+
+    aacplus_cfg->bitRate = avctx->bit_rate;
+    aacplus_cfg->bandWidth = avctx->cutoff;
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+        aacplus_cfg->outputFormat = 0; //raw aac
+    }
+    aacplus_cfg->inputFormat = AACPLUS_INPUT_16BIT;
+    if (!aacplusEncSetConfiguration(s->aacplus_handle, aacplus_cfg)) {
+        av_log(avctx, AV_LOG_ERROR, "libaacplus doesn't support this output format!\n");
+        return -1;
+    }
+
+    avctx->frame_size = samples_input / avctx->channels;
+
+    avctx->coded_frame= avcodec_alloc_frame();
+    avctx->coded_frame->key_frame= 1;
+
+    /* Set decoder specific info */
+    avctx->extradata_size = 0;
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+
+        unsigned char *buffer = NULL;
+        unsigned long decoder_specific_info_size;
+
+        if (aacplusEncGetDecoderSpecificInfo(s->aacplus_handle, &buffer,
+                                           &decoder_specific_info_size) == 1) {
+            avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
+            avctx->extradata_size = decoder_specific_info_size;
+            memcpy(avctx->extradata, buffer, avctx->extradata_size);
+        }
+#undef free
+        free(buffer);
+#define free please_use_av_free
+    }
+    return 0;
+}
+
+static int aacPlus_encode_frame(AVCodecContext *avctx,
+                             unsigned char *frame, int buf_size, void *data)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    int bytes_written;
+
+    bytes_written = aacplusEncEncode(s->aacplus_handle,
+                                  data,
+                                  avctx->frame_size * avctx->channels,
+                                  frame,
+                                  buf_size);
+
+    return bytes_written;
+}
+
+static av_cold int aacPlus_encode_close(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+
+    av_freep(&avctx->coded_frame);
+    av_freep(&avctx->extradata);
+
+    aacplusEncClose(s->aacplus_handle);
+    return 0;
+}
+
+AVCodec ff_libaacplus_encoder = {
+    "libaacplus",
+    AVMEDIA_TYPE_AUDIO,
+    CODEC_ID_AAC,
+    sizeof(aacPlusAudioContext),
+    aacPlus_encode_init,
+    aacPlus_encode_frame,
+    aacPlus_encode_close,
+    .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"),
+};