backport libvo-aacenc wrapper for aac encoding

Changelog

@@ -10,6 +10,7 @@ version 0.6.3:
 - lavf: inspect more frames for fps when container time base is coarse
 - AMV: disable DR1 and don't override EMU_EDGE
   (addresses http://seclists.org/bugtraq/2011/Apr/257)
+- AAC encoding via libvo-aacenc
 
 
 version 0.6.2:

configure

@@ -181,6 +181,7 @@ External library support:
   --enable-libschroedinger enable Dirac support via libschroedinger [no]
   --enable-libspeex        enable Speex decoding via libspeex [no]
   --enable-libtheora       enable Theora encoding via libtheora [no]
+  --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
   --enable-libvorbis       enable Vorbis encoding via libvorbis,
                            native implementation exists [no]
   --enable-libvpx          enable VP8 support via libvpx [no]
@@ -929,6 +930,7 @@ CONFIG_LIST="
     libschroedinger
     libspeex
     libtheora
+    libvo_aacenc
     libvorbis
     libvpx
     libx264
@@ -1357,6 +1359,7 @@ libschroedinger_decoder_deps="libschroedinger"
 libschroedinger_encoder_deps="libschroedinger"
 libspeex_decoder_deps="libspeex"
 libtheora_encoder_deps="libtheora"
+libvo_aacenc_encoder_deps="libvo_aacenc"
 libvorbis_encoder_deps="libvorbis"
 libvpx_decoder_deps="libvpx"
 libvpx_encoder_deps="libvpx"
@@ -2347,6 +2350,7 @@ die_license_disabled nonfree libfaac
 
 die_license_disabled version3 libopencore_amrnb
 die_license_disabled version3 libopencore_amrwb
+die_license_disabled version3 libvo_aacenc
 
 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
 
@@ -2623,6 +2627,7 @@ enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) &&
                            require libschroedinger schroedinger/schro.h schro_init $(pkg-config --libs schroedinger-1.0)
 enabled libspeex   && require  libspeex speex/speex.h speex_decoder_init -lspeex
 enabled libtheora  && require  libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
+enabled libvo_aacenc && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
 enabled libvorbis  && require  libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
 enabled libvpx     && require2 libvpx "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_dec_init_ver" -lvpx &&
                       require2 libvpx "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver" -lvpx
@@ -2903,6 +2908,7 @@ echo "librtmp enabled           ${librtmp-no}"
 echo "libschroedinger enabled   ${libschroedinger-no}"
 echo "libspeex enabled          ${libspeex-no}"
 echo "libtheora enabled         ${libtheora-no}"
+echo "libvo-aacenc support      ${libvo_aacenc-no}"
 echo "libvorbis enabled         ${libvorbis-no}"
 echo "libvpx enabled            ${libvpx-no}"
 echo "libx264 enabled           ${libx264-no}"

doc/general.texi

@@ -511,7 +511,7 @@ following image formats are supported:
 @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 libfaac
+    @tab encoding supported through external library libfaac and libvo-aacenc
 @item AC-3                   @tab IX  @tab  X
 @item ADPCM 4X Movie         @tab     @tab  X
 @item ADPCM CDROM XA         @tab     @tab  X

libavcodec/Makefile

@@ -527,6 +527,7 @@ OBJS-$(CONFIG_LIBSCHROEDINGER_ENCODER)    += libschroedingerenc.o \
 OBJS-$(CONFIG_LIBSPEEX_DECODER)           += libspeexdec.o
 OBJS-$(CONFIG_LIBTHEORA_ENCODER)          += libtheoraenc.o
 OBJS-$(CONFIG_LIBVORBIS_ENCODER)          += libvorbis.o
+OBJS-$(CONFIG_LIBVO_AACENC_ENCODER)       += libvo-aacenc.o mpeg4audio.o
 OBJS-$(CONFIG_LIBVPX_DECODER)             += libvpxdec.o
 OBJS-$(CONFIG_LIBVPX_ENCODER)             += libvpxenc.o
 OBJS-$(CONFIG_LIBX264_ENCODER)            += libx264.o

libavcodec/allcodecs.c

@@ -343,6 +343,7 @@ void avcodec_register_all(void)
     REGISTER_ENCDEC  (LIBSCHROEDINGER, libschroedinger);
     REGISTER_DECODER (LIBSPEEX, libspeex);
     REGISTER_ENCODER (LIBTHEORA, libtheora);
+    REGISTER_ENCODER (LIBVO_AACENC, libvo_aacenc);
     REGISTER_ENCODER (LIBVORBIS, libvorbis);
     REGISTER_ENCDEC  (LIBVPX, libvpx);
     REGISTER_ENCODER (LIBX264, libx264);

libavcodec/libvo-aacenc.c

@@ -0,0 +1,128 @@
+/*
+ * AAC encoder wrapper
+ * Copyright (c) 2010 Martin Storsjo
+ *
+ * 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
+ */
+
+#include <vo-aacenc/voAAC.h>
+#include <vo-aacenc/cmnMemory.h>
+
+#include "avcodec.h"
+#include "mpeg4audio.h"
+
+typedef struct AACContext {
+    VO_AUDIO_CODECAPI codec_api;
+    VO_HANDLE handle;
+    VO_MEM_OPERATOR mem_operator;
+    VO_CODEC_INIT_USERDATA user_data;
+} AACContext;
+
+static av_cold int aac_encode_init(AVCodecContext *avctx)
+{
+    AACContext *s = avctx->priv_data;
+    AACENC_PARAM params = { 0 };
+    int index;
+
+    avctx->coded_frame = avcodec_alloc_frame();
+    avctx->frame_size = 1024;
+
+    voGetAACEncAPI(&s->codec_api);
+
+    s->mem_operator.Alloc = cmnMemAlloc;
+    s->mem_operator.Copy = cmnMemCopy;
+    s->mem_operator.Free = cmnMemFree;
+    s->mem_operator.Set = cmnMemSet;
+    s->mem_operator.Check = cmnMemCheck;
+    s->user_data.memflag = VO_IMF_USERMEMOPERATOR;
+    s->user_data.memData = &s->mem_operator;
+    s->codec_api.Init(&s->handle, VO_AUDIO_CodingAAC, &s->user_data);
+
+    params.sampleRate = avctx->sample_rate;
+    params.bitRate    = avctx->bit_rate;
+    params.nChannels  = avctx->channels;
+    params.adtsUsed   = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
+    if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, &params)
+        != VO_ERR_NONE) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    avctx->extradata_size = 2;
+    avctx->extradata      = av_mallocz(avctx->extradata_size +
+                                       FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata)
+        return AVERROR(ENOMEM);
+
+    for (index = 0; index < 16; index++)
+        if (avctx->sample_rate == ff_mpeg4audio_sample_rates[index])
+            break;
+    if (index == 16) {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n",
+                                    avctx->sample_rate);
+        return AVERROR_NOTSUPP;
+    }
+    avctx->extradata[0] = 0x02 << 3 | index >> 1;
+    avctx->extradata[1] = (index & 0x01) << 7 | avctx->channels << 3;
+    return 0;
+}
+
+static int aac_encode_close(AVCodecContext *avctx)
+{
+    AACContext *s = avctx->priv_data;
+
+    s->codec_api.Uninit(s->handle);
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+static int aac_encode_frame(AVCodecContext *avctx,
+                            unsigned char *frame/*out*/,
+                            int buf_size, void *data/*in*/)
+{
+    AACContext *s = avctx->priv_data;
+    VO_CODECBUFFER input = { 0 }, output = { 0 };
+    VO_AUDIO_OUTPUTINFO output_info = { { 0 } };
+
+    input.Buffer = data;
+    input.Length = 2 * avctx->channels * avctx->frame_size;
+    output.Buffer = frame;
+    output.Length = buf_size;
+
+    s->codec_api.SetInputData(s->handle, &input);
+    if (s->codec_api.GetOutputData(s->handle, &output, &output_info)
+        != VO_ERR_NONE) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n");
+        return AVERROR_UNKNOWN;
+    }
+    return output.Length;
+}
+
+AVCodec ff_libvo_aacenc_encoder = {
+    "libvo_aacenc",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_AAC,
+    sizeof(AACContext),
+    aac_encode_init,
+    aac_encode_frame,
+    aac_encode_close,
+    NULL,
+    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("libvo-aacenc AAC"),
+};
+