am7xxx-play.c

/*
 * am7xxx-play - play stuff on an am7xxx device (e.g. Acer C110, PicoPix 1020)
 *
 * Copyright (C) 2012-2014  Antonio Ospite <ao2@ao2.it>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

 
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <signal.h>
#include <getopt.h>
 
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavformat/avformat.h>
#include <libavutil/imgutils.h>
#include <libswscale/swscale.h>
 
#include <am7xxx.h>
 
static unsigned int run = 1;
 
struct video_input_ctx {
        AVFormatContext *format_ctx;
        AVCodecContext  *codec_ctx;
        int video_stream_index;
};
 
static int video_input_init(struct video_input_ctx *input_ctx,
                            const char *input_format_string,
                            const char *input_path,
                            AVDictionary **input_options)
{
        AVInputFormat const *input_format = NULL;
        AVFormatContext *input_format_ctx;
        AVCodecParameters *input_codec_params;
        AVCodecContext *input_codec_ctx;
        AVCodec const *input_codec;
        int video_index;
        int ret;
 
        avdevice_register_all();
#if LIBAVCODEC_VERSION_MAJOR < 59
        avcodec_register_all();
        av_register_all();
#endif
 
        if (input_format_string) {
                /* find the desired input format */
                input_format = av_find_input_format(input_format_string);
                if (input_format == NULL) {
                        fprintf(stderr, "cannot find input format\n");
                        ret = -ENODEV;
                        goto out;
                }
        }
 
        if (input_path == NULL) {
                fprintf(stderr, "input_path must not be NULL!\n");
                ret = -EINVAL;
                goto out;
        }
 
        /* open the input format/device */
        input_format_ctx = NULL;
        ret = avformat_open_input(&input_format_ctx,
                                  input_path,
                                  input_format,
                                  input_options);
        if (ret < 0) {
                fprintf(stderr, "cannot open input format/device\n");
                goto out;
        }
 
        /* get information on the input stream (e.g. format, bitrate, framerate) */
        ret = avformat_find_stream_info(input_format_ctx, NULL);
        if (ret < 0) {
                fprintf(stderr, "cannot get information on the stream\n");
                goto cleanup;
        }
 
        /* dump what was found */
        av_dump_format(input_format_ctx, 0, input_path, 0);
 
        /* look for the first video_stream */
        video_index = av_find_best_stream(input_format_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &input_codec, 0);
        if (video_index < 0) {
                fprintf(stderr, "cannot find any video streams\n");
                ret = -EINVAL;
                goto cleanup;
        }
 
        input_codec_ctx = avcodec_alloc_context3(input_codec);
        if (input_codec_ctx == NULL) {
                fprintf(stderr, "failed to allocate the input codec context\n");
                ret = -ENOMEM;
                goto cleanup;
        }
 
        input_codec_params = input_format_ctx->streams[video_index]->codecpar;
        ret = avcodec_parameters_to_context(input_codec_ctx, input_codec_params);
        if (ret < 0) {
                fprintf(stderr, "cannot copy parameters to input codec context\n");
                goto cleanup_ctx;
        }
 
        /* open the decoder */
        ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
        if (ret < 0) {
                fprintf(stderr, "cannot open input codec\n");
                goto cleanup_ctx;
        }
 
        input_ctx->format_ctx = input_format_ctx;
        input_ctx->codec_ctx = input_codec_ctx;
        input_ctx->video_stream_index = video_index;
 
        ret = 0;
        goto out;
 
cleanup_ctx:
        avcodec_free_context(&input_codec_ctx);
cleanup:
        avformat_close_input(&input_format_ctx);
out:
        av_dict_free(input_options);
        *input_options = NULL;
        return ret;
}
 
 
struct video_output_ctx {
        AVCodecContext  *codec_ctx;
        int raw_output;
};
 
static int video_output_init(struct video_output_ctx *output_ctx,
                             struct video_input_ctx *input_ctx,
                             unsigned int upscale,
                             unsigned int quality,
                             am7xxx_image_format image_format,
                             am7xxx_device *dev)
{
        AVCodecContext *output_codec_ctx;
        AVCodec const *output_codec;
        unsigned int new_output_width;
        unsigned int new_output_height;
        int ret;
 
        if (input_ctx == NULL) {
                fprintf(stderr, "input_ctx must not be NULL!\n");
                ret = -EINVAL;
                goto out;
        }
 
        /* create the encoder context */
        output_codec_ctx = avcodec_alloc_context3(NULL);
        if (output_codec_ctx == NULL) {
                fprintf(stderr, "cannot allocate output codec context!\n");
                ret = -ENOMEM;
                goto out;
        }
 
        /* Calculate the new output dimension so the original frame is shown
         * in its entirety */
        ret = am7xxx_calc_scaled_image_dimensions(dev,
                                                  upscale,
                                                  (input_ctx->codec_ctx)->width,
                                                  (input_ctx->codec_ctx)->height,
                                                  &new_output_width,
                                                  &new_output_height);
        if (ret < 0) {
                fprintf(stderr, "cannot calculate output dimension\n");
                goto cleanup;
        }
 
        /* put sample parameters */
        output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
        output_codec_ctx->width      = new_output_width;
        output_codec_ctx->height     = new_output_height;
        output_codec_ctx->time_base.num  =
                (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
        output_codec_ctx->time_base.den  =
                (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
 
        /* When the raw format is requested we don't actually need to setup
         * and open a decoder
         */
        if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
                fprintf(stdout, "using raw output format\n");
                output_codec_ctx->pix_fmt    = AV_PIX_FMT_NV12;
                output_ctx->codec_ctx = output_codec_ctx;
                output_ctx->raw_output = 1;
                ret = 0;
                goto out;
        }
 
        /* YUVJ420P is deprecated in swscaler, but mjpeg still relies on it. */
        output_codec_ctx->pix_fmt    = AV_PIX_FMT_YUVJ420P;
        output_codec_ctx->codec_id   = AV_CODEC_ID_MJPEG;
        output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
 
        /* Set quality and other VBR settings */
 
        /* @note: 'quality' is expected to be between 1 and 100, but a value
         * between 0 to 99 has to be passed when calculating qmin and qmax.
         * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
         * in particular they won't be 0, this is needed because they are used
         * as divisor somewhere in the encoding process */
        output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
        output_codec_ctx->mb_lmin    = output_codec_ctx->qmin * FF_QP2LAMBDA;
        output_codec_ctx->mb_lmax    = output_codec_ctx->qmax * FF_QP2LAMBDA;
        output_codec_ctx->flags      |= AV_CODEC_FLAG_QSCALE;
        output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
 
        /* find the encoder */
        output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
        if (output_codec == NULL) {
                fprintf(stderr, "cannot find output codec!\n");
                ret = -EINVAL;
                goto cleanup;
        }
 
        /* open the codec */
        ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
        if (ret < 0) {
                fprintf(stderr, "could not open output codec!\n");
                goto cleanup;
        }
 
        output_ctx->codec_ctx = output_codec_ctx;
        output_ctx->raw_output = 0;
 
        ret = 0;
        goto out;
 
cleanup:
        avcodec_free_context(&output_codec_ctx);
out:
        return ret;
}
 
 
/*
 * Wrap the new avcodec API from FFMpeg 3.1 to minimize the changes in the
 * user code.
 *
 * If the use of the wrappers were to be made conditional, a check like the
 * following could be used:
 *
 *      #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 48, 101))
 *
 * As derived from the APIchanges document:
 * https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges
 *
 * The wrapper implementation has been taken from:
 * https://blogs.gentoo.org/lu_zero/2016/03/29/new-avcodec-api/
 */
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
{
        int ret;
 
        *got_frame = 0;
 
        if (pkt) {
                ret = avcodec_send_packet(avctx, pkt);
                /*
                 * In particular, we don't expect AVERROR(EAGAIN), because we
                 * read all decoded frames with avcodec_receive_frame() until
                 * done.
                 */
                if (ret < 0)
                        return ret == AVERROR_EOF ? 0 : ret;
        }
 
        ret = avcodec_receive_frame(avctx, frame);
        if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
                return ret;
        if (ret >= 0)
                *got_frame = 1;
 
        return 0;
}
 
static int encode(AVCodecContext *avctx, AVPacket *pkt, int *got_packet, AVFrame *frame)
{
        int ret;
 
        *got_packet = 0;
 
        ret = avcodec_send_frame(avctx, frame);
        if (ret < 0)
                return ret;
 
        ret = avcodec_receive_packet(avctx, pkt);
        if (!ret)
                *got_packet = 1;
        if (ret == AVERROR(EAGAIN))
                return 0;
 
        return ret;
}
 
 
static int am7xxx_play(const char *input_format_string,
                       AVDictionary **input_options,
                       const char *input_path,
                       unsigned int rescale_method,
                       unsigned int upscale,
                       unsigned int quality,
                       am7xxx_image_format image_format,
                       am7xxx_device *dev,
                       int dump_frame)
{
        struct video_input_ctx input_ctx;
        struct video_output_ctx output_ctx;
        AVFrame *frame_raw;
        AVFrame *frame_scaled;
        int out_buf_size;
        uint8_t *out_buf;
        int out_frame_size;
        uint8_t *out_frame;
        struct SwsContext *sw_scale_ctx;
        AVPacket in_packet;
        AVPacket out_packet;
        int got_frame;
        int got_packet;
        int ret;
 
        ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
        if (ret < 0) {
                fprintf(stderr, "cannot initialize input\n");
                goto out;
        }
 
        ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
        if (ret < 0) {
                fprintf(stderr, "cannot initialize input\n");
                goto cleanup_input;
        }
 
        /* allocate an input frame */
        frame_raw = av_frame_alloc();
        if (frame_raw == NULL) {
                fprintf(stderr, "cannot allocate the raw frame!\n");
                ret = -ENOMEM;
                goto cleanup_output;
        }
 
        /* allocate output frame */
        frame_scaled = av_frame_alloc();
        if (frame_scaled == NULL) {
                fprintf(stderr, "cannot allocate the scaled frame!\n");
                ret = -ENOMEM;
                goto cleanup_frame_raw;
        }
        frame_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
        frame_scaled->width = (output_ctx.codec_ctx)->width;
        frame_scaled->height = (output_ctx.codec_ctx)->height;
 
        /* calculate the bytes needed for the output image and create buffer for the output image */
        out_buf_size = av_image_get_buffer_size((output_ctx.codec_ctx)->pix_fmt,
                                                (output_ctx.codec_ctx)->width,
                                                (output_ctx.codec_ctx)->height,
                                                1);
        out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
        if (out_buf == NULL) {
                fprintf(stderr, "cannot allocate output data buffer!\n");
                ret = -ENOMEM;
                goto cleanup_frame_scaled;
        }
 
        /* assign appropriate parts of buffer to image planes in frame_scaled */
        av_image_fill_arrays(frame_scaled->data,
                             frame_scaled->linesize,
                             out_buf,
                             (output_ctx.codec_ctx)->pix_fmt,
                             (output_ctx.codec_ctx)->width,
                             (output_ctx.codec_ctx)->height,
                             1);
 
        sw_scale_ctx = sws_getCachedContext(NULL,
                                            (input_ctx.codec_ctx)->width,
                                            (input_ctx.codec_ctx)->height,
                                            (input_ctx.codec_ctx)->pix_fmt,
                                            (output_ctx.codec_ctx)->width,
                                            (output_ctx.codec_ctx)->height,
                                            (output_ctx.codec_ctx)->pix_fmt,
                                            rescale_method,
                                            NULL, NULL, NULL);
        if (sw_scale_ctx == NULL) {
                fprintf(stderr, "cannot set up the rescaling context!\n");
                ret = -EINVAL;
                goto cleanup_out_buf;
        }
 
        got_packet = 0;
        while (run) {
                /* read packet */
                ret = av_read_frame(input_ctx.format_ctx, &in_packet);
                if (ret < 0) {
                        if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
                                ret = 0;
                        else
                                fprintf(stderr, "av_read_frame failed, EOF?\n");
                        run = 0;
                        goto end_while;
                }
 
                if (in_packet.stream_index != input_ctx.video_stream_index) {
                        /* that is more or less a "continue", but there is
                         * still the packet to free */
                        goto end_while;
                }
 
                /* decode */
                got_frame = 0;
                ret = decode(input_ctx.codec_ctx, frame_raw, &got_frame, &in_packet);
                if (ret < 0) {
                        fprintf(stderr, "cannot decode video\n");
                        run = 0;
                        goto end_while;
                }
 
                /* if we got the complete frame */
                if (got_frame) {
                        /*
                         * Rescaling the frame also changes its pixel format
                         * to the raw format supported by the projector if
                         * this was set in video_output_init()
                         */
                        sws_scale(sw_scale_ctx,
                                  (const uint8_t * const *)frame_raw->data,
                                  frame_raw->linesize,
                                  0,
                                  (input_ctx.codec_ctx)->height,
                                  frame_scaled->data,
                                  frame_scaled->linesize);
 
                        if (output_ctx.raw_output) {
                                out_frame = out_buf;
                                out_frame_size = out_buf_size;
                        } else {
                                frame_scaled->quality = (output_ctx.codec_ctx)->global_quality;
                                av_init_packet(&out_packet);
                                out_packet.data = NULL;
                                out_packet.size = 0;
                                got_packet = 0;
                                ret = encode(output_ctx.codec_ctx,
                                             &out_packet,
                                             &got_packet,
                                             frame_scaled);
                                if (ret < 0 || !got_packet) {
                                        fprintf(stderr, "cannot encode video\n");
                                        run = 0;
                                        goto end_while;
                                }
 
                                out_frame = out_packet.data;
                                out_frame_size = out_packet.size;
                        }
 
#ifdef DEBUG
                        if (dump_frame) {
                                char filename[NAME_MAX];
                                FILE *file;
                                if (!output_ctx.raw_output)
                                        snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
                                else
                                        snprintf(filename, NAME_MAX, "out.raw");
                                file = fopen(filename, "wb");
                                fwrite(out_frame, 1, out_frame_size, file);
                                fclose(file);
                        }
#else
                        (void) dump_frame;
#endif
 
                        ret = am7xxx_send_image_async(dev,
                                                      image_format,
                                                      (output_ctx.codec_ctx)->width,
                                                      (output_ctx.codec_ctx)->height,
                                                      out_frame,
                                                      out_frame_size);
                        if (ret < 0) {
                                perror("am7xxx_send_image_async");
                                run = 0;
                                goto end_while;
                        }
                }
end_while:
                if (!output_ctx.raw_output && got_packet)
                        av_packet_unref(&out_packet);
                av_packet_unref(&in_packet);
        }
 
        sws_freeContext(sw_scale_ctx);
cleanup_out_buf:
        av_free(out_buf);
cleanup_frame_scaled:
        av_frame_free(&frame_scaled);
cleanup_frame_raw:
        av_frame_free(&frame_raw);
 
cleanup_output:
        /* Freeing the codec context is needed as well,
         * see https://libav.org/documentation/doxygen/master/group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f
         */
        avcodec_free_context(&(output_ctx.codec_ctx));
 
cleanup_input:
        avcodec_free_context(&(input_ctx.codec_ctx));
        avformat_close_input(&(input_ctx.format_ctx));
 
out:
        return ret;
}
 
#ifdef HAVE_XCB
#include <xcb/xcb.h>
static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
{
        int i, screen_number;
        xcb_connection_t *connection;
        const xcb_setup_t *setup;
        xcb_screen_iterator_t iter;
 
        connection = xcb_connect(displayname, &screen_number);
        if (xcb_connection_has_error(connection)) {
                fprintf(stderr, "Cannot open a connection to %s\n", displayname);
                return -EINVAL;
        }
 
        setup = xcb_get_setup(connection);
        if (setup == NULL) {
                fprintf(stderr, "Cannot get setup for %s\n", displayname);
                xcb_disconnect(connection);
                return -EINVAL;
        }
 
        iter = xcb_setup_roots_iterator(setup);
        for (i = 0; i < screen_number; ++i) {
                xcb_screen_next(&iter);
        }
 
        xcb_screen_t *screen = iter.data;
 
        *width = screen->width_in_pixels;
        *height = screen->height_in_pixels;
 
        xcb_disconnect(connection);
 
        return 0;
}
 
static char *get_x_screen_size(const char *input_path)
{
        int len;
        int width;
        int height;
        char *screen_size;
        int ret;
 
        ret = x_get_screen_dimensions(input_path, &width, &height);
        if (ret < 0) {
                fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
                return NULL;
        }
 
        len = snprintf(NULL, 0, "%dx%d", width, height);
 
        screen_size = malloc((len + 1) * sizeof(char));
        if (screen_size == NULL) {
                perror("malloc");
                return NULL;
        }
 
        len = snprintf(screen_size, len + 1, "%dx%d", width, height);
        if (len < 0) {
                free(screen_size);
                screen_size = NULL;
                return NULL;
        }
        return screen_size;
}
#else
static char *get_x_screen_size(const char *input_path)
{
        (void) input_path;
        fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
        return strdup("vga");
}
#endif
 
static void unset_run(int signo)
{
        (void) signo;
        run = 0;
}
 
#ifdef HAVE_SIGACTION
static int set_signal_handler(void (*signal_handler)(int))
{
        struct sigaction new_action;
        struct sigaction old_action;
        int ret;
 
        new_action.sa_handler = signal_handler;
        sigemptyset(&new_action.sa_mask);
        new_action.sa_flags = 0;
 
        ret = sigaction(SIGINT, NULL, &old_action);
        if (ret < 0) {
                perror("sigaction on old_action");
                goto out;
        }
 
        if (old_action.sa_handler != SIG_IGN) {
                ret = sigaction(SIGINT, &new_action, NULL);
                if (ret < 0) {
                        perror("sigaction on new_action");
                        goto out;
                }
        }
 
out:
        return ret;
}
#else
static int set_signal_handler(void (*signal_handler)(int))
{
        (void)signal_handler;
        fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
        return 0;
}
#endif
 
 
static void usage(char *name)
{
        printf("usage: %s [OPTIONS]\n\n", name);
        printf("OPTIONS:\n");
        printf("\t-d <index>\t\tthe device index (default is 0)\n");
#ifdef DEBUG
        printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
#endif
        printf("\t-f <input format>\tthe input device format\n");
        printf("\t-i <input path>\t\tthe input path\n");
        printf("\t-o <options>\t\ta comma separated list of input format options\n");
        printf("\t\t\t\tEXAMPLE:\n");
        printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
        printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
        printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
        printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
        printf("\t\t\t\tSUPPORTED FORMATS:\n");
        printf("\t\t\t\t\t1 - JPEG\n");
        printf("\t\t\t\t\t2 - NV12\n");
        printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
        printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
        printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
               AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
        printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
        printf("\t\t\t\t         the slave connector to be plugged in.\n");
        printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
               AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
        printf("\t-h \t\t\tthis help message\n");
        printf("\n\nEXAMPLES OF USE:\n");
        printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
        printf("\t%s -f fbdev -i /dev/fb0\n", name);
        printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
        printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
}
 
int main(int argc, char *argv[])
{
        int ret;
        int opt;
        char *subopts;
        char *subopts_saved;
        char *subopt;
        char *input_format_string = NULL;
        AVDictionary *options = NULL;
        char *input_path = NULL;
        unsigned int rescale_method = SWS_BICUBIC;
        unsigned int upscale = 0;
        unsigned int quality = 95;
        int log_level = AM7XXX_LOG_INFO;
        int device_index = 0;
        int power_mode = AM7XXX_POWER_LOW;
        int zoom = AM7XXX_ZOOM_ORIGINAL;
        int format = AM7XXX_IMAGE_FORMAT_JPEG;
        am7xxx_context *ctx;
        am7xxx_device *dev;
        int dump_frame = 0;
 
        while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
                switch (opt) {
                case 'd':
                        device_index = atoi(optarg);
                        if (device_index < 0) {
                                fprintf(stderr, "Unsupported device index\n");
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'D':
                        dump_frame = 1;
#ifndef DEBUG
                        fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
#endif
                        break;
                case 'f':
                        input_format_string = strdup(optarg);
                        break;
                case 'i':
                        input_path = strdup(optarg);
                        break;
                case 'o':
#ifdef HAVE_STRTOK_R
                        /*
                         * parse suboptions, the expected format is something
                         * like:
                         *   draw_mouse=1,framerate=100,video_size=800x480
                         */
                        subopts = subopts_saved = strdup(optarg);
                        while ((subopt = strtok_r(subopts, ",", &subopts))) {
                                char *subopt_name = strtok_r(subopt, "=", &subopt);
                                char *subopt_value = strtok_r(NULL, "", &subopt);
                                if (subopt_value == NULL) {
                                        fprintf(stderr, "invalid suboption: %s\n", subopt_name);
                                        continue;
                                }
                                av_dict_set(&options, subopt_name, subopt_value, 0);
                        }
                        free(subopts_saved);
#else
                        fprintf(stderr, "Option '-o' not implemented\n");
#endif
                        break;
                case 's':
                        rescale_method = atoi(optarg);
                        switch(rescale_method) {
                        case SWS_FAST_BILINEAR:
                        case SWS_BILINEAR:
                        case SWS_BICUBIC:
                        case SWS_X:
                        case SWS_POINT:
                        case SWS_AREA:
                        case SWS_BICUBLIN:
                        case SWS_GAUSS:
                        case SWS_SINC:
                        case SWS_LANCZOS:
                        case SWS_SPLINE:
                                break;
                        default:
                                fprintf(stderr, "Unsupported rescale method\n");
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'u':
                        upscale = 1;
                        break;
                case 'F':
                        format = atoi(optarg);
                        switch(format) {
                        case AM7XXX_IMAGE_FORMAT_JPEG:
                                fprintf(stdout, "JPEG format\n");
                                break;
                        case AM7XXX_IMAGE_FORMAT_NV12:
                                fprintf(stdout, "NV12 format\n");
                                break;
                        default:
                                fprintf(stderr, "Unsupported format\n");
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'q':
                        quality = atoi(optarg);
                        if (quality < 1 || quality > 100) {
                                fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'l':
                        log_level = atoi(optarg);
                        if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
                                fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
                                log_level = AM7XXX_LOG_ERROR;
                        }
                        break;
                case 'p':
                        power_mode = atoi(optarg);
                        switch(power_mode) {
                        case AM7XXX_POWER_OFF:
                        case AM7XXX_POWER_LOW:
                        case AM7XXX_POWER_MIDDLE:
                        case AM7XXX_POWER_HIGH:
                        case AM7XXX_POWER_TURBO:
                                fprintf(stdout, "Power mode: %d\n", power_mode);
                                break;
                        default:
                                fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
                                        AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'z':
                        zoom = atoi(optarg);
                        switch(zoom) {
                        case AM7XXX_ZOOM_ORIGINAL:
                        case AM7XXX_ZOOM_H:
                        case AM7XXX_ZOOM_H_V:
                        case AM7XXX_ZOOM_TEST:
                        case AM7XXX_ZOOM_TELE:
                                fprintf(stdout, "Zoom: %d\n", zoom);
                                break;
                        default:
                                fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
                                        AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
                                ret = -EINVAL;
                                goto out;
                        }
                        break;
                case 'h':
                        usage(argv[0]);
                        ret = 0;
                        goto out;
                default: /* '?' */
                        usage(argv[0]);
                        ret = -EINVAL;
                        goto out;
                }
        }
 
        if (input_path == NULL) {
                fprintf(stderr, "The -i option must always be passed\n\n");
                usage(argv[0]);
                ret = -EINVAL;
                goto out;
        }
 
        /*
         * When the input format is 'x11grab' set some useful fallback options
         * if not supplied by the user, in particular grab full screen
         */
        if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
                char *video_size;
 
                video_size = get_x_screen_size(input_path);
 
                if (!av_dict_get(options, "video_size", NULL, 0))
                        av_dict_set(&options, "video_size", video_size, 0);
 
                if (!av_dict_get(options, "framerate", NULL, 0))
                        av_dict_set(&options, "framerate", "60", 0);
 
                if (!av_dict_get(options, "draw_mouse", NULL, 0))
                        av_dict_set(&options, "draw_mouse",  "1", 0);
 
                free(video_size);
        }
 
        ret = set_signal_handler(unset_run);
        if (ret < 0) {
                perror("sigaction");
                goto out;
        }
 
        ret = am7xxx_init(&ctx);
        if (ret < 0) {
                perror("am7xxx_init");
                goto out;
        }
 
        am7xxx_set_log_level(ctx, log_level);
 
        ret = am7xxx_open_device(ctx, &dev, device_index);
        if (ret < 0) {
                perror("am7xxx_open_device");
                goto cleanup;
        }
 
        ret = am7xxx_set_zoom_mode(dev, zoom);
        if (ret < 0) {
                perror("am7xxx_set_zoom_mode");
                goto cleanup;
        }
 
        ret = am7xxx_set_power_mode(dev, power_mode);
        if (ret < 0) {
                perror("am7xxx_set_power_mode");
                goto cleanup;
        }
 
        /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
        if (zoom == AM7XXX_ZOOM_TEST)
                goto cleanup;
 
        ret = am7xxx_play(input_format_string,
                          &options,
                          input_path,
                          rescale_method,
                          upscale,
                          quality,
                          format,
                          dev,
                          dump_frame);
        if (ret < 0) {
                fprintf(stderr, "am7xxx_play failed\n");
                goto cleanup;
        }
 
cleanup:
        am7xxx_shutdown(ctx);
out:
        av_dict_free(&options);
        free(input_path);
        free(input_format_string);
        return ret;
}