/*******************************************************************************
* Copyright (C) 2018 Cadence Design Systems, Inc.
* 
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to use this Software with Cadence processor cores only and 
* not with any other processors and platforms, subject to
* the following conditions:
* 
* The above copyright notice and this permission notice 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.

******************************************************************************/

#define MODULE_TAG                      PLYBK

#include <tinyalsa/asoundlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#include "xf.h"
#include "xa_playback.h"

#if 0
#define ID_RIFF 0x46464952
#define ID_WAVE 0x45564157
#define ID_FMT  0x20746d66
#define ID_DATA 0x61746164

#define HIFI_MISC_IOCTL_PCM_GAIN _IOW('A',  0x7b, struct misc_io_pcm_buf_param)
#define HIFI_DSP_MISC_DRIVER "/dev/hifi_misc"
struct misc_io_pcm_buf_param {
	uint64_t			buf;			
	uint32_t			buf_size;		
};

struct riff_wave_header {
    uint32_t riff_id;
    uint32_t riff_sz;
    uint32_t wave_id;
};

struct chunk_header {
    uint32_t id;
    uint32_t sz;
};

struct chunk_fmt {
    uint16_t audio_format;
    uint16_t num_channels;
    uint32_t sample_rate;
    uint32_t byte_rate;
    uint16_t block_align;
    uint16_t bits_per_sample;
};

static int s_close = 0;

void play_sample(FILE *file, unsigned int card, unsigned int device, unsigned int channels,
                 unsigned int rate, unsigned int bits, unsigned int period_size,
                 unsigned int period_count);

void stream_close(int sig)
{
    /* allow the stream to be closed gracefully */
    signal(sig, SIG_IGN);
    s_close = 1;
}
#endif

#if 0
int main(int argc, char **argv)
{
    FILE *file;
    struct riff_wave_header riff_wave_header;
    struct chunk_header chunk_header;
    struct chunk_fmt chunk_fmt;
    unsigned int device = 0;
    unsigned int card = 0;
    unsigned int period_size = 1024;
    unsigned int period_count = 4;
    char *filename;
    int more_chunks = 1;

    if (argc < 2) {
        fprintf(stderr, "Usage: %s file.wav [-D card] [-d device] [-p period_size]"
                " [-n n_periods] \n", argv[0]);
        return 1;
    }

    filename = argv[1];
    file = fopen(filename, "rb");
    if (!file) {
        fprintf(stderr, "Unable to open file '%s'\n", filename);
        return 1;
    }

    fread(&riff_wave_header, sizeof(riff_wave_header), 1, file);
    if ((riff_wave_header.riff_id != ID_RIFF) ||
        (riff_wave_header.wave_id != ID_WAVE)) {
        fprintf(stderr, "Error: '%s' is not a riff/wave file\n", filename);
        fclose(file);
        return 1;
    }

    do {
        fread(&chunk_header, sizeof(chunk_header), 1, file);

        switch (chunk_header.id) {
        case ID_FMT:
            fread(&chunk_fmt, sizeof(chunk_fmt), 1, file);
            /* If the format header is larger, skip the rest */
            if (chunk_header.sz > sizeof(chunk_fmt))
                fseek(file, chunk_header.sz - sizeof(chunk_fmt), SEEK_CUR);
            break;
        case ID_DATA:
            /* Stop looking for chunks */
            more_chunks = 0;
            break;
        default:
            /* Unknown chunk, skip bytes */
            fseek(file, chunk_header.sz, SEEK_CUR);
        }
    } while (more_chunks);

    /* parse command line arguments */
    argv += 2;
    while (*argv) {
        if (strcmp(*argv, "-d") == 0) {
            argv++;
            if (*argv)
                device = atoi(*argv);
        }
        if (strcmp(*argv, "-p") == 0) {
            argv++;
            if (*argv)
                period_size = atoi(*argv);
        }
        if (strcmp(*argv, "-n") == 0) {
            argv++;
            if (*argv)
                period_count = atoi(*argv);
        }
        if (strcmp(*argv, "-D") == 0) {
            argv++;
            if (*argv)
                card = atoi(*argv);
        }
        if (*argv)
            argv++;
    }

    play_sample(file, card, device, chunk_fmt.num_channels, chunk_fmt.sample_rate,
                chunk_fmt.bits_per_sample, period_size, period_count);

    fclose(file);

    return 0;
}
#endif

static int check_param(struct pcm_params *params, unsigned int param, unsigned int value,
                       char *param_name, char *param_unit)
{
    unsigned int min;
    unsigned int max;
    int is_within_bounds = 1;

    min = pcm_params_get_min(params, param);
    if (value < min) {
        TRACE(ERROR, _x("%s is %u%s, device only supports >= %u%s\n"), param_name, value,
                param_unit, min, param_unit);
        is_within_bounds = 0;
    }

    max = pcm_params_get_max(params, param);
    if (value > max) {
        TRACE(ERROR, _x("%s is %u%s, device only supports <= %u%s\n"), param_name, value,
                param_unit, max, param_unit);
        is_within_bounds = 0;
    }

    return is_within_bounds;
}

static int sample_is_playable(unsigned int card, unsigned int device, unsigned int channels,
                              unsigned int rate, unsigned int bits, unsigned int period_size,
                              unsigned int period_count)
{
    struct pcm_params *params;
    int can_play;

    params = pcm_params_get(card, device, PCM_OUT);
    if (params == NULL) {
        TRACE(ERROR, _x("Unable to open PCM device %u.\n"), device);
        return 0;
    }

    can_play = check_param(params, PCM_PARAM_RATE, rate, "Sample rate", "Hz");
    can_play &= check_param(params, PCM_PARAM_CHANNELS, channels, "Sample", " channels");
    can_play &= check_param(params, PCM_PARAM_SAMPLE_BITS, bits, "Bitrate", " bits");
    can_play &= check_param(params, PCM_PARAM_PERIOD_SIZE, period_size, "Period size", "Hz");
    can_play &= check_param(params, PCM_PARAM_PERIODS, period_count, "Period count", "Hz");

    pcm_params_free(params);

    return can_play;
}

void *xa_playback_open(unsigned int card, 
		       unsigned int device, 
		       unsigned int channels,
                       unsigned int rate, 
		       unsigned int bits, 
		       unsigned int period_size,
                       unsigned int period_count)
{
    struct pcm_config config;
    struct pcm *pcm;

    memset(&config, 0, sizeof(config));
    config.channels = channels;
    config.rate = rate;
    config.period_size = period_size;
    config.period_count = period_count;
    if (bits == 32)
        config.format = PCM_FORMAT_S32_LE;
    else if (bits == 16)
        config.format = PCM_FORMAT_S16_LE;
    config.start_threshold = 0;
    config.stop_threshold = 0;
    config.silence_threshold = 0;

    if (!sample_is_playable(card, device, channels, rate, bits, period_size, period_count)) {
        return NULL;
    }

    pcm = pcm_open(card, device, PCM_OUT, &config);
    if (!pcm || !pcm_is_ready(pcm)) {
        TRACE(ERROR, _x("Unable to open PCM device %u (%s)\n"),
                device, pcm_get_error(pcm));
        return NULL;
    }

    return pcm;
}

int xa_playback_buf(void *handle, 
	 	    const void *data, 
 		    unsigned int nbytes)
{
    int err;

    if (!handle || !data)
	return XA_PLAYBACK_INVALID_PARAM;
    
    if (nbytes > 0) {
        err = pcm_write(handle, data, nbytes);
 	
	if (err == -EINVAL) return XA_PLAYBACK_INVALID_PARAM;  	
	if (err == -EPIPE ) return XA_PLAYBACK_UNDERRUN;  	
    }

    return XA_PLAYBACK_OK;
}

int xa_playback_close(void *handle)
{
    return pcm_close(handle);
}

#if 0
void play_sample(FILE *file, unsigned int card, unsigned int device, unsigned int channels,
                 unsigned int rate, unsigned int bits, unsigned int period_size,
                 unsigned int period_count)
{
    struct pcm_config config;
    struct pcm *pcm;
    char *buffer;
    int size;
    int num_read;
    int hifi_dsp_fd;      
    struct misc_io_pcm_buf_param pcmbuf;

    hifi_dsp_fd = open(HIFI_DSP_MISC_DRIVER, O_RDWR, 0);
    if(hifi_dsp_fd < 0){
        printf("Error opening hifi dsp device %d", errno);
    }

    memset(&config, 0, sizeof(config));
    config.channels = channels;
    config.rate = rate;
    config.period_size = period_size;
    config.period_count = period_count;
    if (bits == 32)
        config.format = PCM_FORMAT_S32_LE;
    else if (bits == 16)
        config.format = PCM_FORMAT_S16_LE;
    config.start_threshold = 0;
    config.stop_threshold = 0;
    config.silence_threshold = 0;

    if (!sample_is_playable(card, device, channels, rate, bits, period_size, period_count)) {
        return;
    }

    pcm = pcm_open(card, device, PCM_OUT, &config);
    if (!pcm || !pcm_is_ready(pcm)) {
        fprintf(stderr, "Unable to open PCM device %u (%s)\n",
                device, pcm_get_error(pcm));
        return;
    }

    size = pcm_frames_to_bytes(pcm, pcm_get_buffer_size(pcm));
    buffer = malloc(size);
    if (!buffer) {
        fprintf(stderr, "Unable to allocate %d bytes\n", size);
        free(buffer);
        pcm_close(pcm);
        return;
    }

    printf("Playing sample: %u ch, %u hz, %u bit\n", channels, rate, bits);

    /* catch ctrl-c to shutdown cleanly */
    signal(SIGINT, stream_close);

    do {
        num_read = fread(buffer, 1, size, file);

        pcmbuf.buf =(uint64_t) buffer;
        pcmbuf.buf_size = num_read;
        if(hifi_dsp_fd) {
      //      printf("ioctl send \n");
            ioctl(hifi_dsp_fd,HIFI_MISC_IOCTL_PCM_GAIN, &pcmbuf);
        //    printf("ioctl complete \n");
        }

        if (num_read > 0) {
            if (pcm_write(pcm, buffer, num_read)) {
                fprintf(stderr, "Error playing sample\n");
                break;
            }
        }
    } while (!s_close && num_read > 0);

    free(buffer);
    pcm_close(pcm);
    close(hifi_dsp_fd);
}
#endif