picoproj: support setting the zoom mode

[libam7xxx.git] / examples / am7xxx-play.c

diff --git a/examples/am7xxx-play.c b/examples/am7xxx-play.c
index 5aa53ae..324ed89 100644 (file)
--- a/examples/am7xxx-play.c
+++ b/examples/am7xxx-play.c
@@ -17,6 +17,12 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @example examples/am7xxx-play.c
+ * am7xxx-play uses libavdevice, libavformat, libavcodec and libswscale to
+ * decode the input, encode it to jpeg and display it with libam7xxx.
+ */
+
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
@@ -29,6 +35,13 @@
 
 #include <am7xxx.h>
 
+/* On some systems ENOTSUP is not defined, fallback to its value on
+ * linux which is equal to EOPNOTSUPP which is 95
+ */
+#ifndef ENOTSUP
+#define ENOTSUP 95
+#endif
+
 static unsigned int run = 1;
 
 struct video_input_ctx {
@@ -84,7 +97,7 @@ static int video_input_init(struct video_input_ctx *input_ctx,
        /* 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");
+               fprintf(stderr, "cannot get information on the stream\n");
                goto cleanup;
        }
 
@@ -115,7 +128,7 @@ static int video_input_init(struct video_input_ctx *input_ctx,
        /* find the decoder for the video stream */
        input_codec = avcodec_find_decoder(input_codec_ctx->codec_id);
        if (input_codec == NULL) {
-               fprintf(stderr, "input_codec is NULL!");
+               fprintf(stderr, "input_codec is NULL!\n");
                ret = -ENOTSUP;
                goto cleanup;
        }
@@ -163,7 +176,7 @@ static int video_output_init(struct video_output_ctx *output_ctx,
        int ret;
 
        if (input_ctx == NULL) {
-               fprintf(stderr, "input_ctx must not be NULL!");
+               fprintf(stderr, "input_ctx must not be NULL!\n");
                ret = -EINVAL;
                goto out;
        }
@@ -171,7 +184,7 @@ static int video_output_init(struct video_output_ctx *output_ctx,
        /* create the encoder context */
        output_codec_ctx = avcodec_alloc_context3(NULL);
        if (output_codec_ctx == NULL) {
-               fprintf(stderr, "cannot allocate output codec context!");
+               fprintf(stderr, "cannot allocate output codec context!\n");
                ret = -ENOMEM;
                goto out;
        }
@@ -193,8 +206,10 @@ static int video_output_init(struct video_output_ctx *output_ctx,
        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->codec_ctx)->time_base.num;
-       output_codec_ctx->time_base.den  = (input_ctx->codec_ctx)->time_base.den;
+       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
@@ -290,7 +305,7 @@ static int am7xxx_play(const char *input_format_string,
        /* allocate an input frame */
        picture_raw = avcodec_alloc_frame();
        if (picture_raw == NULL) {
-               fprintf(stderr, "cannot allocate the raw picture frame!");
+               fprintf(stderr, "cannot allocate the raw picture frame!\n");
                ret = -ENOMEM;
                goto cleanup_output;
        }
@@ -524,6 +539,7 @@ static void unset_run(int signo)
        run = 0;
 }
 
+#ifdef HAVE_SIGACTION
 static int set_signal_handler(void (*signal_handler)(int))
 {
        struct sigaction new_action;
@@ -551,6 +567,15 @@ static int set_signal_handler(void (*signal_handler)(int))
 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)
 {
@@ -598,7 +623,7 @@ int main(int argc, char *argv[])
        am7xxx_context *ctx;
        am7xxx_device *dev;
 
-       while ((opt = getopt(argc, argv, "f:i:o:s:uF:q:l:hp:")) != -1) {
+       while ((opt = getopt(argc, argv, "f:i:o:s:uF:q:l:p:h")) != -1) {
                switch (opt) {
                case 'f':
                        input_format_string = strdup(optarg);
@@ -607,6 +632,7 @@ int main(int argc, char *argv[])
                        input_path = strdup(optarg);
                        break;
                case 'o':
+#ifdef HAVE_STRTOK_R
                        /*
                         * parse suboptions, the expected format is something
                         * like:
@@ -623,6 +649,9 @@ int main(int argc, char *argv[])
                                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);
@@ -678,11 +707,6 @@ int main(int argc, char *argv[])
                                log_level = AM7XXX_LOG_ERROR;
                        }
                        break;
-               case 'h':
-                       usage(argv[0]);
-                       ret = 0;
-                       goto out;
-                       break;
                case 'p':
                        power_mode = atoi(optarg);
                        switch(power_mode) {
@@ -699,6 +723,11 @@ int main(int argc, char *argv[])
                                goto out;
                        }
                        break;
+               case 'h':
+                       usage(argv[0]);
+                       ret = 0;
+                       goto out;
+                       break;
                default: /* '?' */
                        usage(argv[0]);
                        ret = -EINVAL;