a2dp: move codecs to separate files

spa/plugins/bluez5/a2dp-codec-aac.c

@@ -0,0 +1,177 @@
+/* Spa A2DP SBC codec
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <stddef.h>
+#include <errno.h>
+#include <arpa/inet.h>
+
+#include <spa/param/audio/format.h>
+
+#include "defs.h"
+#include "rtp.h"
+#include "a2dp-codecs.h"
+
+struct impl {
+	struct rtp_header *header;
+	struct rtp_payload *payload;
+
+	int codesize;
+	int frame_length;
+
+	int min_bitpool;
+	int max_bitpool;
+};
+
+static int codec_fill_caps(uint32_t flags, uint8_t caps[A2DP_MAX_CAPS_SIZE])
+{
+	const a2dp_aac_t a2dp_aac = {
+		.object_type =
+			/* NOTE: AAC Long Term Prediction and AAC Scalable are
+			 *       not supported by the FDK-AAC library. */
+			AAC_OBJECT_TYPE_MPEG2_AAC_LC |
+			AAC_OBJECT_TYPE_MPEG4_AAC_LC,
+		AAC_INIT_FREQUENCY(
+			AAC_SAMPLING_FREQ_8000 |
+			AAC_SAMPLING_FREQ_11025 |
+			AAC_SAMPLING_FREQ_12000 |
+			AAC_SAMPLING_FREQ_16000 |
+			AAC_SAMPLING_FREQ_22050 |
+			AAC_SAMPLING_FREQ_24000 |
+			AAC_SAMPLING_FREQ_32000 |
+			AAC_SAMPLING_FREQ_44100 |
+			AAC_SAMPLING_FREQ_48000 |
+			AAC_SAMPLING_FREQ_64000 |
+			AAC_SAMPLING_FREQ_88200 |
+			AAC_SAMPLING_FREQ_96000)
+		.channels =
+			AAC_CHANNELS_1 |
+			AAC_CHANNELS_2,
+		.vbr = 1,
+		AAC_INIT_BITRATE(0xFFFF)
+	};
+	memcpy(caps, &a2dp_aac, sizeof(a2dp_aac));
+	return sizeof(a2dp_aac);
+}
+
+static int codec_select_config(uint32_t flags, const void *caps, size_t caps_size,
+			const struct spa_audio_info *info, uint8_t config[A2DP_MAX_CAPS_SIZE])
+{
+	a2dp_aac_t conf;
+	int freq;
+
+	if (caps_size < sizeof(conf))
+		return -EINVAL;
+
+	conf = *(a2dp_aac_t*)caps;
+
+	if (conf.object_type & AAC_OBJECT_TYPE_MPEG2_AAC_LC)
+		conf.object_type = AAC_OBJECT_TYPE_MPEG2_AAC_LC;
+	else if (conf.object_type & AAC_OBJECT_TYPE_MPEG4_AAC_LC)
+		conf.object_type = AAC_OBJECT_TYPE_MPEG4_AAC_LC;
+	else if (conf.object_type & AAC_OBJECT_TYPE_MPEG4_AAC_LTP)
+		conf.object_type = AAC_OBJECT_TYPE_MPEG4_AAC_LTP;
+	else if (conf.object_type & AAC_OBJECT_TYPE_MPEG4_AAC_SCA)
+		conf.object_type = AAC_OBJECT_TYPE_MPEG4_AAC_SCA;
+	else
+		return -ENOTSUP;
+
+	freq = AAC_GET_FREQUENCY(conf);
+	if (freq & AAC_SAMPLING_FREQ_48000)
+		freq = AAC_SAMPLING_FREQ_48000;
+	else if (freq & AAC_SAMPLING_FREQ_44100)
+		freq = AAC_SAMPLING_FREQ_44100;
+	else if (freq & AAC_SAMPLING_FREQ_64000)
+		freq = AAC_SAMPLING_FREQ_64000;
+	else if (freq & AAC_SAMPLING_FREQ_32000)
+		freq = AAC_SAMPLING_FREQ_32000;
+	else if (freq & AAC_SAMPLING_FREQ_88200)
+		freq = AAC_SAMPLING_FREQ_88200;
+	else if (freq & AAC_SAMPLING_FREQ_96000)
+		freq = AAC_SAMPLING_FREQ_96000;
+	else if (freq & AAC_SAMPLING_FREQ_24000)
+		freq = AAC_SAMPLING_FREQ_24000;
+	else if (freq & AAC_SAMPLING_FREQ_22050)
+		freq = AAC_SAMPLING_FREQ_22050;
+	else if (freq & AAC_SAMPLING_FREQ_16000)
+		freq = AAC_SAMPLING_FREQ_16000;
+	else if (freq & AAC_SAMPLING_FREQ_12000)
+		freq = AAC_SAMPLING_FREQ_12000;
+	else if (freq & AAC_SAMPLING_FREQ_11025)
+		freq = AAC_SAMPLING_FREQ_11025;
+	else if (freq & AAC_SAMPLING_FREQ_8000)
+		freq = AAC_SAMPLING_FREQ_8000;
+	else
+		return -ENOTSUP;
+
+	AAC_SET_FREQUENCY(conf, freq);
+
+	if (conf.channels & AAC_CHANNELS_2)
+		conf.channels = AAC_CHANNELS_2;
+	else if (conf.channels & AAC_CHANNELS_1)
+		conf.channels = AAC_CHANNELS_1;
+	else
+		return -ENOTSUP;
+
+	memcpy(config, &conf, sizeof(conf));
+
+	return sizeof(conf);
+}
+
+static void *codec_init(uint32_t flags, void *config, size_t config_len, struct spa_audio_info *info)
+{
+	struct impl *this;
+	int res;
+
+	this = calloc(1, sizeof(struct impl));
+	if (this == NULL) {
+		res = -errno;
+		goto error;
+	}
+
+	spa_zero(*info);
+	info->media_type = SPA_MEDIA_TYPE_audio;
+	info->media_subtype = SPA_MEDIA_SUBTYPE_aac;
+
+	return this;
+error:
+	errno = -res;
+	return NULL;
+}
+
+static void codec_deinit(void *data)
+{
+	struct impl *this = data;
+	free(this);
+}
+
+struct a2dp_codec a2dp_codec_aac = {
+	.codec_id = A2DP_CODEC_MPEG24,
+	.name = "aac",
+	.description = "AAC",
+	.fill_caps = codec_fill_caps,
+	.select_config = codec_select_config,
+	.init = codec_init,
+	.deinit = codec_deinit,
+};