[alsa-devel] [PATCH 2/2] cplay: add option to specify codec ID
Katsuhiro Suzuki
suzuki.katsuhiro at socionext.com
Tue Jan 23 03:33:12 CET 2018
This patch adds a -I command line option to set the codec ID,
same as crecord.
Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro at socionext.com>
---
src/utils/cplay.c | 174 +++++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 139 insertions(+), 35 deletions(-)
diff --git a/src/utils/cplay.c b/src/utils/cplay.c
index bc95f0d..a716f5e 100644
--- a/src/utils/cplay.c
+++ b/src/utils/cplay.c
@@ -74,25 +74,75 @@
#include "tinycompress/tinymp3.h"
static int verbose;
+static const unsigned int DEFAULT_CODEC_ID = SND_AUDIOCODEC_PCM;
+
+static const struct {
+ const char *name;
+ unsigned int id;
+} codec_ids[] = {
+ { "PCM", SND_AUDIOCODEC_PCM },
+ { "MP3", SND_AUDIOCODEC_MP3 },
+ { "AMR", SND_AUDIOCODEC_AMR },
+ { "AMRWB", SND_AUDIOCODEC_AMRWB },
+ { "AMRWBPLUS", SND_AUDIOCODEC_AMRWBPLUS },
+ { "AAC", SND_AUDIOCODEC_AAC },
+ { "WMA", SND_AUDIOCODEC_WMA },
+ { "REAL", SND_AUDIOCODEC_REAL },
+ { "VORBIS", SND_AUDIOCODEC_VORBIS },
+ { "FLAC", SND_AUDIOCODEC_FLAC },
+ { "IEC61937", SND_AUDIOCODEC_IEC61937 },
+ { "G723_1", SND_AUDIOCODEC_G723_1 },
+ { "G729", SND_AUDIOCODEC_G729 },
+/* BESPOKE isn't defined on older kernels */
+#ifdef SND_AUDIOCODEC_BESPOKE
+ { "BESPOKE", SND_AUDIOCODEC_BESPOKE },
+#endif
+};
+#define CPLAY_NUM_CODEC_IDS (sizeof(codec_ids) / sizeof(codec_ids[0]))
+
+static const char *codec_name_from_id(unsigned int id)
+{
+ static char hexname[12];
+ int i;
+
+ for (i = 0; i < CPLAY_NUM_CODEC_IDS; ++i) {
+ if (codec_ids[i].id == id)
+ return codec_ids[i].name;
+ }
+
+ snprintf(hexname, sizeof(hexname), "0x%x", id);
+ return hexname; /* a static is safe because we're single-threaded */
+}
static void usage(void)
{
+ int i;
+
fprintf(stderr, "usage: cplay [OPTIONS] filename\n"
"-c\tcard number\n"
"-d\tdevice node\n"
+ "-I\tspecify codec ID (default is mp3)\n"
"-b\tbuffer size\n"
"-f\tfragments\n\n"
"-v\tverbose mode\n"
"-h\tPrints this help list\n\n"
"Example:\n"
"\tcplay -c 1 -d 2 test.mp3\n"
- "\tcplay -f 5 test.mp3\n");
+ "\tcplay -f 5 test.mp3\n\n"
+ "Valid codec IDs:\n");
+
+ for (i = 0; i < CPLAY_NUM_CODEC_IDS; ++i)
+ fprintf(stderr, "%s%c", codec_ids[i].name,
+ ((i + 1) % 8) ? ' ' : '\n');
+
+ fprintf(stderr, "\nor the value in decimal or hex\n");
exit(EXIT_FAILURE);
}
void play_samples(char *name, unsigned int card, unsigned int device,
- unsigned long buffer_size, unsigned int frag);
+ unsigned long buffer_size, unsigned int frag,
+ unsigned long codec_id);
struct mp3_header {
uint16_t sync;
@@ -156,15 +206,15 @@ int main(int argc, char **argv)
{
char *file;
unsigned long buffer_size = 0;
- int c;
+ int c, i;
unsigned int card = 0, device = 0, frag = 0;
-
+ unsigned int codec_id = SND_AUDIOCODEC_MP3;
if (argc < 2)
usage();
verbose = 0;
- while ((c = getopt(argc, argv, "hvb:f:c:d:")) != -1) {
+ while ((c = getopt(argc, argv, "hvb:f:c:d:I:")) != -1) {
switch (c) {
case 'h':
usage();
@@ -181,6 +231,25 @@ int main(int argc, char **argv)
case 'd':
device = strtol(optarg, NULL, 10);
break;
+ case 'I':
+ if (optarg[0] == '0') {
+ codec_id = strtol(optarg, NULL, 0);
+ } else {
+ for (i = 0; i < CPLAY_NUM_CODEC_IDS; ++i) {
+ if (strcmp(optarg,
+ codec_ids[i].name) == 0) {
+ codec_id = codec_ids[i].id;
+ break;
+ }
+ }
+
+ if (i == CPLAY_NUM_CODEC_IDS) {
+ fprintf(stderr, "Unrecognised ID: %s\n",
+ optarg);
+ usage();
+ }
+ }
+ break;
case 'v':
verbose = 1;
break;
@@ -193,24 +262,74 @@ int main(int argc, char **argv)
file = argv[optind];
- play_samples(file, card, device, buffer_size, frag);
+ play_samples(file, card, device, buffer_size, frag, codec_id);
fprintf(stderr, "Finish Playing.... Close Normally\n");
exit(EXIT_SUCCESS);
}
+void get_codec_mp3(FILE *file, struct compr_config *config,
+ struct snd_codec *codec)
+{
+ size_t read;
+ struct mp3_header header;
+ unsigned int channels, rate, bits;
+
+ read = fread(&header, sizeof(header), 1, file);
+ if (read != 1) {
+ fprintf(stderr, "Unable to read header \n");
+ fclose(file);
+ exit(EXIT_FAILURE);
+ }
+
+ if (parse_mp3_header(&header, &channels, &rate, &bits) == -1) {
+ fclose(file);
+ exit(EXIT_FAILURE);
+ }
+
+ codec->id = SND_AUDIOCODEC_MP3;
+ codec->ch_in = channels;
+ codec->ch_out = channels;
+ codec->sample_rate = rate;
+ if (!codec->sample_rate) {
+ fprintf(stderr, "invalid sample rate %d\n", rate);
+ fclose(file);
+ exit(EXIT_FAILURE);
+ }
+ codec->bit_rate = bits;
+ codec->rate_control = 0;
+ codec->profile = 0;
+ codec->level = 0;
+ codec->ch_mode = 0;
+ codec->format = 0;
+}
+
+int get_codec_iec(FILE *file, struct compr_config *config,
+ struct snd_codec *codec)
+{
+ codec->id = SND_AUDIOCODEC_IEC61937;
+ /* FIXME: cannot get accurate ch_in, any channels may be accepted */
+ codec->ch_in = 2;
+ codec->ch_out = 2;
+ codec->sample_rate = 0;
+ codec->bit_rate = 0;
+ codec->rate_control = 0;
+ codec->profile = SND_AUDIOPROFILE_IEC61937_SPDIF;
+ codec->level = 0;
+ codec->ch_mode = 0;
+ codec->format = 0;
+}
+
void play_samples(char *name, unsigned int card, unsigned int device,
- unsigned long buffer_size, unsigned int frag)
+ unsigned long buffer_size, unsigned int frag,
+ unsigned long codec_id)
{
struct compr_config config;
struct snd_codec codec;
struct compress *compress;
- struct mp3_header header;
FILE *file;
char *buffer;
int size, num_read, wrote;
- unsigned int channels, rate, bits;
- size_t read;
if (verbose)
printf("%s: entry\n", __func__);
@@ -220,33 +339,18 @@ void play_samples(char *name, unsigned int card, unsigned int device,
exit(EXIT_FAILURE);
}
- read = fread(&header, 1, sizeof(header), file);
- if (read != sizeof(header)) {
- fprintf(stderr, "Unable to read header \n");
- fclose(file);
+ switch (codec_id) {
+ case SND_AUDIOCODEC_MP3:
+ get_codec_mp3(file, &config, &codec);
+ break;
+ case SND_AUDIOCODEC_IEC61937:
+ get_codec_iec(file, &config, &codec);
+ break;
+ default:
+ fprintf(stderr, "codec ID %d is not supported\n", codec_id);
exit(EXIT_FAILURE);
}
- if (parse_mp3_header(&header, &channels, &rate, &bits) == -1) {
- fclose(file);
- exit(EXIT_FAILURE);
- }
-
- codec.id = SND_AUDIOCODEC_MP3;
- codec.ch_in = channels;
- codec.ch_out = channels;
- codec.sample_rate = rate;
- if (!codec.sample_rate) {
- fprintf(stderr, "invalid sample rate %d\n", rate);
- fclose(file);
- exit(EXIT_FAILURE);
- }
- codec.bit_rate = bits;
- codec.rate_control = 0;
- codec.profile = 0;
- codec.level = 0;
- codec.ch_mode = 0;
- codec.format = 0;
if ((buffer_size != 0) && (frag != 0)) {
config.fragment_size = buffer_size/frag;
config.fragments = frag;
@@ -292,7 +396,7 @@ void play_samples(char *name, unsigned int card, unsigned int device,
printf("Playing file %s On Card %u device %u, with buffer of %lu bytes\n",
name, card, device, buffer_size);
printf("Format %u Channels %u, %u Hz, Bit Rate %d\n",
- SND_AUDIOCODEC_MP3, channels, rate, bits);
+ codec.id, codec.ch_in, codec.sample_rate, codec.bit_rate);
compress_start(compress);
if (verbose)
--
2.15.0
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