shithub: libvpx

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twopass_encoder: Flush encoder.

Change-Id: Ib04a545b43f3a36c6df7eaf3ed2d802cf41119bb

--- a/examples/twopass_encoder.c

+++ b/examples/twopass_encoder.c

@@ -66,13 +66,14 @@

   exit(EXIT_FAILURE);

 }

-static void get_frame_stats(vpx_codec_ctx_t *ctx,

-                            const vpx_image_t *img,

-                            vpx_codec_pts_t pts,

-                            unsigned int duration,

-                            vpx_enc_frame_flags_t flags,

-                            unsigned int deadline,

-                            vpx_fixed_buf_t *stats) {

+static int get_frame_stats(vpx_codec_ctx_t *ctx,

+                           const vpx_image_t *img,

+                           vpx_codec_pts_t pts,

+                           unsigned int duration,

+                           vpx_enc_frame_flags_t flags,

+                           unsigned int deadline,

+                           vpx_fixed_buf_t *stats) {

+  int got_pkts = 0;

   vpx_codec_iter_t iter = NULL;

   const vpx_codec_cx_pkt_t *pkt = NULL;

   const vpx_codec_err_t res = vpx_codec_encode(ctx, img, pts, duration, flags,

@@ -81,6 +82,8 @@

     die_codec(ctx, "Failed to get frame stats.");

   while ((pkt = vpx_codec_get_cx_data(ctx, &iter)) != NULL) {

+    got_pkts = 1;

+

     if (pkt->kind == VPX_CODEC_STATS_PKT) {

       const uint8_t *const pkt_buf = pkt->data.twopass_stats.buf;

       const size_t pkt_size = pkt->data.twopass_stats.sz;

@@ -89,15 +92,18 @@

       stats->sz += pkt_size;

     }

   }

+

+  return got_pkts;

 }

-static void encode_frame(vpx_codec_ctx_t *ctx,

-                         const vpx_image_t *img,

-                         vpx_codec_pts_t pts,

-                         unsigned int duration,

-                         vpx_enc_frame_flags_t flags,

-                         unsigned int deadline,

-                         VpxVideoWriter *writer) {

+static int encode_frame(vpx_codec_ctx_t *ctx,

+                        const vpx_image_t *img,

+                        vpx_codec_pts_t pts,

+                        unsigned int duration,

+                        vpx_enc_frame_flags_t flags,

+                        unsigned int deadline,

+                        VpxVideoWriter *writer) {

+  int got_pkts = 0;

   vpx_codec_iter_t iter = NULL;

   const vpx_codec_cx_pkt_t *pkt = NULL;

   const vpx_codec_err_t res = vpx_codec_encode(ctx, img, pts, duration, flags,

@@ -106,6 +112,7 @@

     die_codec(ctx, "Failed to encode frame.");

   while ((pkt = vpx_codec_get_cx_data(ctx, &iter)) != NULL) {

+    got_pkts = 1;

     if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) {

       const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0;

@@ -117,12 +124,14 @@

       fflush(stdout);

     }

   }

+

+  return got_pkts;

 }

 static vpx_fixed_buf_t pass0(vpx_image_t *raw,

                              FILE *infile,

                              const VpxInterface *encoder,

-                             vpx_codec_enc_cfg_t *cfg) {

+                             const vpx_codec_enc_cfg_t *cfg) {

   vpx_codec_ctx_t codec;

   int frame_count = 0;

   vpx_fixed_buf_t stats = {NULL, 0};

@@ -130,6 +139,7 @@

   if (vpx_codec_enc_init(&codec, encoder->codec_interface(), cfg, 0))

     die_codec(&codec, "Failed to initialize encoder");

+  // Calculate frame statistics.

   while (vpx_img_read(raw, infile)) {

     ++frame_count;

     get_frame_stats(&codec, raw, frame_count, 1, 0, VPX_DL_BEST_QUALITY,

@@ -136,7 +146,9 @@

                     &stats);

   }

-  get_frame_stats(&codec, NULL, frame_count, 1, 0, VPX_DL_BEST_QUALITY, &stats);

+  // Flush encoder.

+  while (get_frame_stats(&codec, NULL, frame_count, 1, 0,

+                         VPX_DL_BEST_QUALITY, &stats)) {}

   printf("Pass 0 complete. Processed %d frames.\n", frame_count);

   if (vpx_codec_destroy(&codec))

@@ -149,7 +161,7 @@

                   FILE *infile,

                   const char *outfile_name,

                   const VpxInterface *encoder,

-                  vpx_codec_enc_cfg_t *cfg) {

+                  const vpx_codec_enc_cfg_t *cfg) {

   VpxVideoInfo info = {

     encoder->fourcc,

     cfg->g_w,

@@ -167,10 +179,14 @@

   if (vpx_codec_enc_init(&codec, encoder->codec_interface(), cfg, 0))

     die_codec(&codec, "Failed to initialize encoder");

+  // Encode frames.

   while (vpx_img_read(raw, infile)) {

     ++frame_count;

     encode_frame(&codec, raw, frame_count, 1, 0, VPX_DL_BEST_QUALITY, writer);

   }

+

+  // Flush encoder.

+  while (encode_frame(&codec, NULL, -1, 1, 0, VPX_DL_BEST_QUALITY, writer)) {}

   printf("\n");