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From 2912f8573cea25fbd38ac7a8b68af2ea6a05e599 Mon Sep 17 00:00:00 2001
From: Zhang Peng <peng.zhang_8@nxp.com>
Date: Wed, 28 Oct 2020 19:08:53 +0800
Subject: [PATCH] cplay: Support aac streams
Support run aac format streams for cplay.
Upstream-Status: Inappropriate [i.MX specific]
Signed-off-by: Zhang Peng <peng.zhang_8@nxp.com>
---
src/utils/cplay.c | 210 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 210 insertions(+)
diff --git a/src/utils/cplay.c b/src/utils/cplay.c
index 8e3dcbb..2a1464a 100644
--- a/src/utils/cplay.c
+++ b/src/utils/cplay.c
@@ -245,6 +245,190 @@ static int parse_wav_header(FILE *file, unsigned int *num_channels, unsigned int
return 0;
}
+int find_adts_header(FILE *file, unsigned int *num_channels, unsigned int *sample_rate, unsigned int *format)
+{
+ int ret;
+ unsigned char buf[5];
+
+ ret = fread(buf, sizeof(buf), 1, file);
+ if (ret < 0) {
+ fprintf(stderr, "open file error: %d\n", ret);
+ return 0;
+ }
+ fseek(file, 0, SEEK_SET);
+
+ if ((buf[0] != 0xff) || (buf[1] & 0xf0 != 0xf0))
+ return 0;
+ /* mpeg id */
+ switch (buf[1]>>3 & 0x1) {
+ case 0x0:
+ *format = SND_AUDIOSTREAMFORMAT_MP4ADTS;
+ break;
+ case 0x1:
+ *format = SND_AUDIOSTREAMFORMAT_MP2ADTS;
+ break;
+ default:
+ fprintf(stderr, "can't find stream format\n");
+ break;
+ }
+ /* sample_rate */
+ switch (buf[2]>>2 & 0xf) {
+ case 0x0:
+ *sample_rate = 96000;
+ break;
+ case 0x1:
+ *sample_rate = 88200;
+ break;
+ case 0x2:
+ *sample_rate = 64000;
+ break;
+ case 0x3:
+ *sample_rate = 48000;
+ break;
+ case 0x4:
+ *sample_rate = 44100;
+ break;
+ case 0x5:
+ *sample_rate = 32000;
+ break;
+ case 0x6:
+ *sample_rate = 24000;
+ break;
+ case 0x7:
+ *sample_rate = 22050;
+ break;
+ case 0x8:
+ *sample_rate = 16000;
+ break;
+ case 0x9:
+ *sample_rate = 12000;
+ break;
+ case 0xa:
+ *sample_rate = 11025;
+ break;
+ case 0xb:
+ *sample_rate = 8000;
+ break;
+ case 0xc:
+ *sample_rate = 7350;
+ break;
+ default:
+ break;
+ }
+ /* channel */
+ switch (((buf[2]&0x1) << 2) | (buf[3]>>6)) {
+ case 1:
+ *num_channels = 1;
+ break;
+ case 2:
+ *num_channels = 2;
+ break;
+ case 3:
+ *num_channels = 3;
+ break;
+ case 4:
+ *num_channels = 4;
+ break;
+ case 5:
+ *num_channels = 5;
+ break;
+ case 6:
+ *num_channels = 6;
+ break;
+ case 7:
+ *num_channels = 7;
+ break;
+ default:
+ break;
+ }
+ return 1;
+}
+
+static const int aac_sample_rates[] = { 96000, 88200, 64000, 48000, 44100,
+ 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350
+};
+
+#define MAX_SR_NUM sizeof(aac_sample_rates)/sizeof(aac_sample_rates[0])
+
+static int get_sample_rate_from_index(int sr_index)
+{
+ if (sr_index >= 0 && sr_index < MAX_SR_NUM)
+ return aac_sample_rates[sr_index];
+
+ return 0;
+}
+
+int find_adif_header(FILE *file, unsigned int *num_channels, unsigned int *sample_rate, unsigned int *format)
+{
+ int ret;
+ unsigned char adif_id[4];
+ unsigned char adif_header[20];
+ int bitstream_type;
+ int bitrate;
+ int object_type;
+ int sr_index;
+ int skip_size = 0;
+
+ ret = fread(adif_id, sizeof(unsigned char), 4, file);
+ if (ret < 0) {
+ fprintf(stderr, "read data from file err: %d\n", ret);
+ return 0;
+ }
+ /* adif id */
+ if ((adif_id[0] != 0x41) || (adif_id[1] != 0x44) ||
+ (adif_id[2] != 0x49) || (adif_id[3] != 0x46))
+ return 0;
+
+ fread(adif_header, sizeof(unsigned char), 20, file);
+
+ /* copyright string */
+ if (adif_header[0] & 0x80)
+ skip_size = 9;
+
+ bitstream_type = adif_header[0 + skip_size] & 0x10;
+ bitrate =
+ ((unsigned int) (adif_header[0 + skip_size] & 0x0f) << 19) |
+ ((unsigned int) adif_header[1 + skip_size] << 11) |
+ ((unsigned int) adif_header[2 + skip_size] << 3) |
+ ((unsigned int) adif_header[3 + skip_size] & 0xe0);
+
+ if (bitstream_type == 0) {
+ object_type = ((adif_header[6 + skip_size] & 0x01) << 1) |
+ ((adif_header[7 + skip_size] & 0x80) >> 7);
+ sr_index = (adif_header[7 + skip_size] & 0x78) >> 3;
+ }
+ /* VBR */
+ else {
+ object_type = (adif_header[4 + skip_size] & 0x18) >> 3;
+ sr_index = ((adif_header[4 + skip_size] & 0x07) << 1) |
+ ((adif_header[5 + skip_size] & 0x80) >> 7);
+ }
+
+ /* sample rate */
+ *sample_rate = get_sample_rate_from_index(sr_index);
+
+ /* FIXME: assume channels is 2 */
+ *num_channels = 2;
+
+ *format = SND_AUDIOSTREAMFORMAT_ADIF;
+ fseek(file, 0, SEEK_SET);
+ return 1;
+}
+
+static int parse_aac_header(FILE *file, unsigned int *num_channels, unsigned int *sample_rate, unsigned int *format)
+{
+ if (find_adts_header(file, num_channels, sample_rate, format))
+ return 1;
+ else if (find_adif_header(file, num_channels, sample_rate, format))
+ return 1;
+ else {
+ fprintf(stderr, "can't find streams format\n");
+ return 0;
+ }
+
+ return 1;
+}
+
static int print_time(struct compress *compress)
{
unsigned int avail;
@@ -513,6 +697,29 @@ void get_codec_pcm(FILE *file, struct compr_config *config,
codec->format = format;
}
+void get_codec_aac(FILE *file, struct compr_config *config,
+ struct snd_codec *codec)
+{
+ unsigned int channels, rate, format;
+
+ if (parse_aac_header(file, &channels, &rate, &format) == 0) {
+ fclose(file);
+ exit(EXIT_FAILURE);
+ };
+ fseek(file, 0, SEEK_SET);
+
+ codec->id = SND_AUDIOCODEC_AAC;
+ codec->ch_in = channels;
+ codec->ch_out = channels;
+ codec->sample_rate = rate;
+ codec->bit_rate = 0;
+ codec->rate_control = 0;
+ codec->profile = SND_AUDIOPROFILE_AAC;
+ codec->level = 0;
+ codec->ch_mode = 0;
+ codec->format = format;
+
+}
void play_samples(char *name, unsigned int card, unsigned int device,
unsigned long buffer_size, unsigned int frag,
unsigned long codec_id, int pause_count, int pause_block,
@@ -544,6 +751,9 @@ void play_samples(char *name, unsigned int card, unsigned int device,
case SND_AUDIOCODEC_PCM:
get_codec_pcm(file, &config, &codec);
break;
+ case SND_AUDIOCODEC_AAC:
+ get_codec_aac(file, &config, &codec);
+ break;
default:
fprintf(stderr, "codec ID %ld is not supported\n", codec_id);
exit(EXIT_FAILURE);
--
2.17.1
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