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From 4d4bc0a958fe254531920095fbabc241aad88113 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Tue, 28 Jul 2020 13:00:36 +0800
Subject: [PATCH] cplay: Support wave file
The supported format is mono/stereo, S16_LE/S32_LE, 8kHz-192kHz.
Command is:
cplay -c x -I PCM test.wav
Upstream-Status: Inappropriate [i.MX specific]
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
include/tinycompress/wave_formats.h | 51 +++++++++++++
src/utils/cplay.c | 107 ++++++++++++++++++++++++++++
2 files changed, 158 insertions(+)
create mode 100644 include/tinycompress/wave_formats.h
--- /dev/null
+++ b/include/tinycompress/wave_formats.h
@@ -0,0 +1,53 @@
+#ifndef WAVE_FORMATS_H
+#define WAVE_FORMATS_H 1
+
+#include <sys/types.h>
+
+#define COMPOSE_ID(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
+
+#define WAV_RIFF COMPOSE_ID('R','I','F','F')
+#define WAV_RIFX COMPOSE_ID('R','I','F','X')
+#define WAV_WAVE COMPOSE_ID('W','A','V','E')
+#define WAV_FMT COMPOSE_ID('f','m','t',' ')
+#define WAV_DATA COMPOSE_ID('d','a','t','a')
+
+/* WAVE fmt block constants from Microsoft mmreg.h header */
+#define WAV_FMT_PCM 0x0001
+#define WAV_FMT_IEEE_FLOAT 0x0003
+#define WAV_FMT_DOLBY_AC3_SPDIF 0x0092
+#define WAV_FMT_EXTENSIBLE 0xfffe
+
+/* Used with WAV_FMT_EXTENSIBLE format */
+#define WAV_GUID_TAG "\x00\x00\x00\x00\x10\x00\x80\x00\x00\xAA\x00\x38\x9B\x71"
+
+typedef struct {
+ u_int magic; /* 'RIFF' */
+ u_int length; /* filelen */
+ u_int type; /* 'WAVE' */
+} WaveHeader;
+
+typedef struct {
+ u_short format; /* see WAV_FMT_* */
+ u_short channels;
+ u_int sample_fq; /* frequence of sample */
+ u_int byte_p_sec;
+ u_short byte_p_spl; /* samplesize; 1 or 2 bytes */
+ u_short bit_p_spl; /* 8, 12 or 16 bit */
+} WaveFmtBody;
+
+typedef struct {
+ WaveFmtBody format;
+ u_short ext_size;
+ u_short bit_p_spl;
+ u_int channel_mask;
+ u_short guid_format; /* WAV_FMT_* */
+ u_char guid_tag[14]; /* WAV_GUID_TAG */
+} WaveFmtExtensibleBody;
+
+typedef struct {
+ u_int type; /* 'data' */
+ u_int length; /* samplecount */
+} WaveChunkHeader;
+
+
+#endif /* FORMATS */
--- a/src/utils/cplay.c
+++ b/src/utils/cplay.c
@@ -1,4 +1,6 @@
/*
+ * Copyright 2020 NXP
+ *
* This file is provided under a dual BSD/LGPLv2.1 license. When using or
* redistributing this file, you may do so under either license.
*
@@ -73,6 +75,8 @@
#include "tinycompress/tinycompress.h"
#include "tinycompress/tinymp3.h"
#include "tinycompress/id3_tag_decode.h"
+#include "tinycompress/wave_formats.h"
+#include <alsa/asoundlib.h>
static int verbose;
static const unsigned int DEFAULT_CODEC_ID = SND_AUDIOCODEC_PCM;
@@ -166,6 +170,77 @@ static int parse_mp3_header(struct mp3_h
return 0;
}
+static int parse_wav_header(FILE *file, unsigned int *num_channels, unsigned int *sample_rate,
+ unsigned int *format) {
+ WaveHeader wave_header;
+ WaveChunkHeader chunk_header;
+ WaveFmtBody fmt_body;
+ int more_chunks = 1;
+
+ fread(&wave_header, sizeof(WaveHeader), 1, file);
+ if ((wave_header.magic != WAV_RIFF) ||
+ (wave_header.type != WAV_WAVE)) {
+ fprintf(stderr, "Error: it is not a riff/wave file\n");
+ return -1;
+ }
+
+ do {
+ fread(&chunk_header, sizeof(WaveChunkHeader), 1, file);
+ switch (chunk_header.type) {
+ case WAV_FMT:
+ fread(&fmt_body, sizeof(WaveFmtBody), 1, file);
+ /* If the format header is larger, skip the rest */
+ if (chunk_header.length > sizeof(WaveFmtBody))
+ fseek(file, chunk_header.length - sizeof(WaveFmtBody), SEEK_CUR);
+
+ *num_channels = fmt_body.channels;
+ *sample_rate = fmt_body.sample_fq;
+
+ switch (fmt_body.bit_p_spl) {
+ case 8:
+ *format = SND_PCM_FORMAT_U8;
+ break;
+ case 16:
+ *format = SND_PCM_FORMAT_S16_LE;
+ break;
+ case 24:
+ switch (fmt_body.byte_p_spl / fmt_body.channels) {
+ case 3:
+ *format = SND_PCM_FORMAT_S24_3LE;
+ break;
+ case 4:
+ *format = SND_PCM_FORMAT_S24_LE;
+ break;
+ default:
+ fprintf(stderr, "format error\n");
+ return -1;
+ }
+ break;
+ case 32:
+ if (fmt_body.format == WAV_FMT_PCM) {
+ *format = SND_PCM_FORMAT_S32_LE;
+ } else if (fmt_body.format == WAV_FMT_IEEE_FLOAT) {
+ *format = SND_PCM_FORMAT_FLOAT_LE;
+ }
+ break;
+ default:
+ fprintf(stderr, "format error\n");
+ return -1;
+ }
+ break;
+ case WAV_DATA:
+ /* Stop looking for chunks */
+ more_chunks = 0;
+ break;
+ default:
+ /* Unknown chunk, skip bytes */
+ fseek(file, chunk_header.length, SEEK_CUR);
+ }
+ } while (more_chunks);
+
+ return 0;
+}
+
static int print_time(struct compress *compress)
{
unsigned int avail;
@@ -385,6 +460,35 @@ void get_codec_iec(FILE *file, struct co
codec->format = 0;
}
+void get_codec_pcm(FILE *file, struct compr_config *config,
+ struct snd_codec *codec)
+{
+ unsigned int channels, rate, format;
+
+ if (parse_wav_header(file, &channels, &rate, &format) == -1) {
+ fclose(file);
+ exit(EXIT_FAILURE);
+ }
+
+ if (channels > 2 || (format != SND_PCM_FORMAT_S16_LE && format != SND_PCM_FORMAT_S32_LE) ||
+ rate > 192000) {
+ fprintf(stderr, "unsupported wave file\n");
+ fclose(file);
+ exit(EXIT_FAILURE);
+ }
+
+ codec->id = SND_AUDIOCODEC_PCM;
+ codec->ch_in = channels;
+ codec->ch_out = channels;
+ codec->sample_rate = rate;
+ codec->bit_rate = 0;
+ codec->rate_control = 0;
+ codec->profile = SND_AUDIOPROFILE_PCM;
+ 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)
@@ -411,6 +515,9 @@ void play_samples(char *name, unsigned i
case SND_AUDIOCODEC_IEC61937:
get_codec_iec(file, &config, &codec);
break;
+ case SND_AUDIOCODEC_PCM:
+ get_codec_pcm(file, &config, &codec);
+ break;
default:
fprintf(stderr, "codec ID %ld is not supported\n", codec_id);
exit(EXIT_FAILURE);
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