1 files changed, 141 insertions, 0 deletions
diff --git a/libavcodec/libaacplus.c b/libavcodec/libaacplus.c
new file mode 100644
index 0000000..545e240
--- /dev/null
+++ b/libavcodec/libaacplus.c
@@ -0,0 +1,141 @@
+/*
+ * 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 <aacplus.h>
+
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct aacPlusAudioContext {
+    aacplusEncHandle aacplus_handle;
+    unsigned long max_output_bytes;
+    unsigned long samples_input;
+} aacPlusAudioContext;
+
+static av_cold int aacPlus_encode_init(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    aacplusEncConfiguration *aacplus_cfg;
+
+    /* 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 AVERROR(EINVAL);
+    }
+
+    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);
+        return AVERROR(EINVAL);
+    }
+
+    s->aacplus_handle = aacplusEncOpen(avctx->sample_rate, avctx->channels,
+                                       &s->samples_input, &s->max_output_bytes);
+    if (!s->aacplus_handle) {
+        av_log(avctx, AV_LOG_ERROR, "can't open encoder\n");
+        return AVERROR(EINVAL);
+    }
+
+    /* check aacplus version */
+    aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle);
+
+    aacplus_cfg->bitRate = avctx->bit_rate;
+    aacplus_cfg->bandWidth = avctx->cutoff;
+    aacplus_cfg->outputFormat = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
+    aacplus_cfg->inputFormat = avctx->sample_fmt == AV_SAMPLE_FMT_FLT ? AACPLUS_INPUT_FLOAT : 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 AVERROR(EINVAL);
+    }
+
+    avctx->frame_size = s->samples_input / avctx->channels;
+
+    /* 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);
+        }
+        free(buffer);
+    }
+    return 0;
+}
+
+static int aacPlus_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                                const AVFrame *frame, int *got_packet)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    int32_t *input_buffer = (int32_t *)frame->data[0];
+    int ret;
+
+    if ((ret = ff_alloc_packet2(avctx, pkt, s->max_output_bytes)) < 0)
+        return ret;
+
+    pkt->size = aacplusEncEncode(s->aacplus_handle, input_buffer,
+                                 s->samples_input, pkt->data, pkt->size);
+    *got_packet   = 1;
+    pkt->pts      = frame->pts;
+    return 0;
+}
+
+static av_cold int aacPlus_encode_close(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+
+    av_freep(&avctx->extradata);
+    aacplusEncClose(s->aacplus_handle);
+
+    return 0;
+}
+
+static const AVProfile profiles[] = {
+    { FF_PROFILE_AAC_LOW, "LC" },
+    { FF_PROFILE_UNKNOWN },
+};
+
+AVCodec ff_libaacplus_encoder = {
+    .name           = "libaacplus",
+    .long_name      = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"),
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_AAC,
+    .priv_data_size = sizeof(aacPlusAudioContext),
+    .init           = aacPlus_encode_init,
+    .encode2        = aacPlus_encode_frame,
+    .close          = aacPlus_encode_close,
+    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+                                                     AV_SAMPLE_FMT_FLT,
+                                                     AV_SAMPLE_FMT_NONE },
+    .profiles       = profiles,
+    .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
+                                            AV_CH_LAYOUT_STEREO,
+                                            0 },
+};